diff --git a/anchor/app.py b/anchor/app.py
index 036605d..af27b7a 100644
--- a/anchor/app.py
+++ b/anchor/app.py
@@ -60,60 +60,116 @@ def _check_file_exists(path):
 
 
 def validate_config(conf):
-    logger = logging.getLogger("anchor")
+    for old_name in ['auth', 'ca', 'validators']:
+        if old_name in conf.config:
+            raise ConfigValidationException("The config seems to be for an "
+                                            "old version of Anchor. Please "
+                                            "check documentation.")
 
-    if not hasattr(conf, "auth") or not conf.auth:
-        raise ConfigValidationException("No authentication configured")
+    if not conf.config.get('registration_authority'):
+        raise ConfigValidationException("No registration authorities present")
 
-    if not hasattr(conf, "ca") or not conf.ca:
-        raise ConfigValidationException("No ca configuration present")
+    if not conf.config.get('signing_ca'):
+        raise ConfigValidationException("No signing CA configurations present")
+
+    if not conf.config.get('authentication'):
+        raise ConfigValidationException("No authentication methods present")
+
+    for name in conf.registration_authority.keys():
+        logger.info("Checking config for registration authority: %s", name)
+        validate_registration_authority_config(name, conf)
+
+    for name in conf.signing_ca.keys():
+        logger.info("Checking config for signing ca: %s", name)
+        validate_signing_ca_config(name, conf)
+
+    for name in conf.authentication.keys():
+        logger.info("Checking config for authentication method: %s", name)
+        validate_authentication_config(name, conf)
+
+
+def validate_authentication_config(name, conf):
+    auth_conf = conf.authentication[name]
+
+    default_user = "myusername"
+    default_secret = "simplepassword"
+
+    if not auth_conf.get('backend'):
+        raise ConfigValidationException(
+            "Authentication method %s doesn't define backend" % name)
+
+    if auth_conf['backend'] not in ('static', 'keystone', 'ldap'):
+        raise ConfigValidationException(
+            "Authentication backend % unknown" % (auth_conf['backend'],))
+
+    # Check for anchor being run with default user/secret
+    if auth_conf['backend'] == 'static':
+        if auth_conf['user'] == default_user:
+            logger.warning("default user for static auth in use")
+        if auth_conf['secret'] == default_secret:
+            logger.warning("default secret for static auth in use")
+
+
+def validate_signing_ca_config(name, conf):
+    ca_conf = conf.signing_ca[name]
 
     # mandatory CA settings
     ca_config_requirements = ["cert_path", "key_path", "output_path",
                               "signing_hash", "valid_hours"]
 
     for requirement in ca_config_requirements:
-        if requirement not in conf.ca.keys():
-            raise ConfigValidationException("CA config missing: %s" %
-                                            requirement)
+        if requirement not in ca_conf.keys():
+            raise ConfigValidationException(
+                "CA config missing: %s (for signing CA %s)" % (requirement,
+                                                               name))
 
     # all are specified, check the CA certificate and key are readable with
     # sane permissions
-    _check_file_exists(conf.ca['cert_path'])
-    _check_file_exists(conf.ca['key_path'])
+    _check_file_exists(ca_conf['cert_path'])
+    _check_file_exists(ca_conf['key_path'])
 
-    _check_file_permissions(conf.ca['key_path'])
+    _check_file_permissions(ca_conf['key_path'])
 
-    if not hasattr(conf, "validators"):
-        raise ConfigValidationException("No validators configured")
 
-    logger.info("Found {} validator sets.".format(len(conf.validators)))
-    for name, validator_set in conf.validators.items():
-        logger.info("Checking validator set <{}> ....".format(name))
-        if len(validator_set) == 0:
+def validate_registration_authority_config(ra_name, conf):
+    ra_conf = conf.registration_authority[ra_name]
+    auth_name = ra_conf.get('authentication')
+    if not auth_name:
+        raise ConfigValidationException(
+            "No authentication configured for registration authority: %s" %
+            ra_name)
+
+    if not conf.authentication.get(auth_name):
+        raise ConfigValidationException(
+            "Authentication method %s configured for registration authority "
+            "%s doesn't exist" % (auth_name, ra_name))
+
+    ca_name = ra_conf.get('signing_ca')
+    if not ca_name:
+        raise ConfigValidationException(
+            "No signing CA configuration present for registration authority: "
+            "%s" % ra_name)
+
+    if not conf.signing_ca.get(ca_name):
+        raise ConfigValidationException(
+            "Signing CA %s configured for registration authority %s doesn't "
+            "exist" % (ca_name, ra_name))
+
+    if not ra_conf.get("validators"):
+        raise ConfigValidationException(
+            "No validators configured for registration authority: %s" %
+            ra_name)
+
+    ra_validators = ra_conf['validators']
+
+    for step in ra_validators.keys():
+        if not hasattr(validators, step):
             raise ConfigValidationException(
-                "Validator set <{}> is empty".format(name))
+                "Unknown validator <{}> found (for registration "
+                "authority {})".format(step, ra_name))
 
-        for step in validator_set.keys():
-            if not hasattr(validators, step):
-                raise ConfigValidationException(
-                    "Validator set <{}> contains an "
-                    "unknown validator <{}>".format(name, step))
-
-    config_check_domains(validator_set)
-    logger.info("Validator set OK")
-
-
-def check_default_auth(conf):
-    default_user = "myusername"
-    default_secret = "simplepassword"
-
-    # Check for anchor being run with default user/secret
-    if 'static' in conf.auth.keys():
-        if conf.auth['static']['user'] == default_user:
-            logger.warning("default user for static auth in use")
-        if conf.auth['static']['secret'] == default_secret:
-            logger.warning("default secret for static auth in use")
+    config_check_domains(ra_validators)
+    logger.info("Validators OK for registration authority: %s", ra_name)
 
 
 def load_config():
@@ -134,7 +190,7 @@ def load_config():
 
     sys_config_path = os.path.join(os.sep, 'etc', 'anchor', 'config.json')
 
-    if 'auth' not in jsonloader.conf.config:
+    if 'registration_authority' not in jsonloader.conf.config:
         config_path = ""
         if config_name in os.environ:
             config_path = os.environ[config_name]
@@ -163,6 +219,4 @@ def setup_app(config):
         **app_conf
     )
 
-    check_default_auth(jsonloader.conf)
-
     return paste.translogger.TransLogger(app, setup_console_handler=False)
diff --git a/anchor/auth/__init__.py b/anchor/auth/__init__.py
index 73c255e..f495ca6 100644
--- a/anchor/auth/__init__.py
+++ b/anchor/auth/__init__.py
@@ -21,22 +21,24 @@ from anchor.auth import static  # noqa
 from anchor import jsonloader
 
 
-def validate(user, secret):
+def validate(ra_name, user, secret):
     """Top-level authN entry point.
 
        This will return an AuthDetails object or abort. This will only
        check that a single auth method. That method will either succeed
        or fail.
 
+       :param ra_name: name of the registration authority
        :param user: user provided user name
        :param secret: user provided secret (password or token)
        :return: AuthDetails if authenticated or aborts
     """
-    for name in jsonloader.conf.auth.keys():
-        module = globals()[name]
-        res = module.login(user, secret)
-        if res:
-            return res
+    auth_conf = jsonloader.authentication_for_registration_authority(ra_name)
+    backend_name = auth_conf['backend']
+    module = globals()[backend_name]
+    res = module.login(ra_name, user, secret)
+    if res:
+        return res
 
     # we should only get here if a module failed to abort
     pecan.abort(401, "authentication failure")
diff --git a/anchor/auth/static.py b/anchor/auth/static.py
index 28facd7..985fd9f 100644
--- a/anchor/auth/static.py
+++ b/anchor/auth/static.py
@@ -23,7 +23,7 @@ from anchor import util
 logger = logging.getLogger(__name__)
 
 
-def login(user, secret):
+def login(ra_name, user, secret):
     """Validates a user supplied user/password against an expected value.
 
        The expected value is pulled from the pecan config. Note that this
@@ -35,18 +35,21 @@ def login(user, secret):
        leaked. It may also be possible to use a timing attack to see
        which input failed validation. See comments below for details.
 
+       :param ra_name: name of the registration authority
        :param user: The user supplied username (unicode or string)
        :param secret: The user supplied password (unicode or string)
        :return: None on failure or an AuthDetails object on success
     """
+    auth_conf = jsonloader.authentication_for_registration_authority(ra_name)
+
     # convert input to strings
     user = str(user)
     secret = str(secret)
 
     # expected values
     try:
-        expected_user = str(jsonloader.conf.auth['static']['user'])
-        expected_secret = str(jsonloader.conf.auth['static']['secret'])
+        expected_user = str(auth_conf['user'])
+        expected_secret = str(auth_conf['secret'])
     except (KeyError, TypeError):
         logger.warning("auth conf missing static user or secret")
         return None
diff --git a/anchor/certificate_ops.py b/anchor/certificate_ops.py
index d789cda..e9d8beb 100644
--- a/anchor/certificate_ops.py
+++ b/anchor/certificate_ops.py
@@ -85,60 +85,60 @@ def _run_validator(name, body, args):
         return False
 
 
-def validate_csr(auth_result, csr, request):
+def validate_csr(ra_name, auth_result, csr, request):
     """Validates various aspects of the CSR based on the loaded config.
 
        The arguments of this method are passed to the underlying validate
        methods. Therefore, some may be optional, depending on which
        validation routines are specified in the configuration.
 
+       :param ra_name: name of the registration authority
        :param auth_result: AuthDetails value from auth.validate
        :param csr: CSR value from certificate_ops.parse_csr
        :param request: pecan request object associated with this action
     """
-    # TODO(tkelsey): make this more robust
 
+    ra_conf = jsonloader.config_for_registration_authority(ra_name)
     args = {'auth_result': auth_result,
             'csr': csr,
-            'conf': jsonloader.conf,
+            'conf': ra_conf,
             'request': request}
 
     # It is ok if the config doesn't have any validators listed
-    # so we set the initial state to valid.
     valid = True
-
     try:
-        for name, vset in jsonloader.conf.validators.items():
-            logger.debug("validate_csr: checking with set {}".format(name))
-            for vname, validator in vset.items():
-                valid = _run_validator(vname, validator, args)
-                if not valid:
-                    break  # early out at the first error
+        for vname, validator in ra_conf['validators'].items():
+            valid = _run_validator(vname, validator, args)
+            if not valid:
+                break
 
     except Exception as e:
         logger.exception("Error running validator <%s> - %s", vname, e)
         pecan.abort(500, "Internal Validation Error running validator "
-                         "'{}' in set '{}'".format(vname, name))
+                         "'{}' for registration authority "
+                         "'{}'".format(vname, ra_name))
 
-    # something failed, return a 400 to the client
     if not valid:
         pecan.abort(400, "CSR failed validation")
 
 
-def sign(csr):
+def sign(ra_name, csr):
     """Generate an X.509 certificate and sign it.
 
+    :param ra_name: name of the registration authority
     :param csr: X509 certificate signing request
     """
+    ca_conf = jsonloader.signing_ca_for_registration_authority(ra_name)
+
     try:
         ca = certificate.X509Certificate.from_file(
-            jsonloader.conf.ca["cert_path"])
+            ca_conf['cert_path'])
     except Exception as e:
         logger.exception("Cannot load the signing CA: %s", e)
         pecan.abort(500, "certificate signing error")
 
     try:
-        key = utils.get_private_key_from_file(jsonloader.conf.ca['key_path'])
+        key = utils.get_private_key_from_file(ca_conf['key_path'])
     except Exception as e:
         logger.exception("Cannot load the signing CA key: %s", e)
         pecan.abort(500, "certificate signing error")
@@ -147,7 +147,7 @@ def sign(csr):
     new_cert.set_version(2)
 
     start_time = int(time.time())
-    end_time = start_time + (jsonloader.conf.ca['valid_hours'] * 60 * 60)
+    end_time = start_time + (ca_conf['valid_hours'] * 60 * 60)
     new_cert.set_not_before(start_time)
     new_cert.set_not_after(end_time)
 
@@ -167,12 +167,12 @@ def sign(csr):
     logger.info("Signing certificate for <%s> with serial <%s>",
                 csr.get_subject(), serial)
 
-    new_cert.sign(key, jsonloader.conf.ca['signing_hash'])
+    new_cert.sign(key, ca_conf['signing_hash'])
 
     path = os.path.join(
-        jsonloader.conf.ca['output_path'],
+        ca_conf['output_path'],
         '%s.crt' % new_cert.get_fingerprint(
-            jsonloader.conf.ca['signing_hash']))
+            ca_conf['signing_hash']))
 
     logger.info("Saving certificate to: %s", path)
 
diff --git a/anchor/controllers/__init__.py b/anchor/controllers/__init__.py
index 17eca90..665bec8 100644
--- a/anchor/controllers/__init__.py
+++ b/anchor/controllers/__init__.py
@@ -18,6 +18,7 @@ from pecan import rest
 
 from anchor import auth
 from anchor import certificate_ops
+from anchor import jsonloader
 
 
 logger = logging.getLogger(__name__)
@@ -31,22 +32,40 @@ class RobotsController(rest.RestController):
         return "User-agent: *\nDisallow: /\n"
 
 
-class SignController(rest.RestController):
-    """Handles POST requests to /sign."""
+class SignInstanceController(rest.RestController):
+    """Handles POST requests to /v1/sign/ra_name."""
+
+    def __init__(self, ra_name):
+        self.ra_name = ra_name
 
     @pecan.expose(content_type="text/plain")
     def post(self):
-        auth_result = auth.validate(pecan.request.POST.get('user'),
-                                    pecan.request.POST.get('secret'))
+        ra_name = self.ra_name
 
+        logger.debug("processing signing request in registration authority %s",
+                     ra_name)
+        auth_result = auth.validate(ra_name,
+                                    pecan.request.POST.get('user'),
+                                    pecan.request.POST.get('secret'))
         csr = certificate_ops.parse_csr(pecan.request.POST.get('csr'),
                                         pecan.request.POST.get('encoding'))
+        certificate_ops.validate_csr(ra_name, auth_result, csr, pecan.request)
 
-        certificate_ops.validate_csr(auth_result, csr, pecan.request)
+        return certificate_ops.sign(ra_name, csr)
 
-        return certificate_ops.sign(csr)
+
+class SignController(rest.RestController):
+    @pecan.expose()
+    def _lookup(self, ra_name, *remaining):
+        if ra_name in jsonloader.registration_authority_names():
+            return SignInstanceController(ra_name), remaining
+        pecan.abort(404)
+
+
+class V1Controller(rest.RestController):
+    sign = SignController()
 
 
 class RootController(object):
     robots = RobotsController()
-    sign = SignController()
+    v1 = V1Controller()
diff --git a/anchor/jsonloader.py b/anchor/jsonloader.py
index be018ad..2ba52c7 100644
--- a/anchor/jsonloader.py
+++ b/anchor/jsonloader.py
@@ -36,19 +36,21 @@ class AnchorConf():
         self._logger = logger
         self._config = {}
 
-    def load_file_data(self, config_file):
-        '''Load a config from a file.'''
+    def _load_json_file(self, config_file):
         try:
             with open(config_file, 'r') as f:
-                self._config = json.load(f)
-
+                return json.load(f)
         except IOError:
             logger.error("could not open config file: %s" % config_file)
             raise
-        except Exception:
+        except ValueError:
             logger.error("error parsing config file: %s" % config_file)
             raise
 
+    def load_file_data(self, config_file):
+        '''Load a config from a file.'''
+        self._config = self._load_json_file(config_file)
+
     def load_str_data(self, data):
         '''Load a config from string data.'''
         self._config = json.loads(data)
@@ -70,3 +72,33 @@ class AnchorConf():
 
 
 conf = AnchorConf(logger)
+
+
+def config_for_registration_authority(ra_name):
+    """Get configuration for a given name."""
+    return conf.registration_authority[ra_name]
+
+
+def authentication_for_registration_authority(ra_name):
+    """Get authentication config for a given name.
+
+    This is only supposed to be called after config validation. All the right
+    elements are expected to be in place.
+    """
+    auth_name = conf.registration_authority[ra_name]['authentication']
+    return conf.authentication[auth_name]
+
+
+def signing_ca_for_registration_authority(ra_name):
+    """Get signing ca config for a given name.
+
+    This is only supposed to be called after config validation. All the right
+    elements are expected to be in place.
+    """
+    ca_name = conf.registration_authority[ra_name]['signing_ca']
+    return conf.signing_ca[ca_name]
+
+
+def registration_authority_names():
+    """List the names of supported registration authorities."""
+    return conf.registration_authority.keys()
diff --git a/config.json b/config.json
index 2a8cf65..12251d7 100755
--- a/config.json
+++ b/config.json
@@ -5,7 +5,6 @@
       "user": "myusername"
     }
   },
-
   "ca": {
     "cert_path": "CA/root-ca.crt",
     "key_path": "CA/root-ca-unwrapped.key",
@@ -13,53 +12,54 @@
     "signing_hash": "sha256",
     "valid_hours": 24
   },
-
-  "validators": {
-    "default" : {
-      "common_name" : {
-        "allowed_domains": [
-          ".example.com"
+  "instances": {
+    "default": {
+      "validators": {
+        "common_name" : {
+          "allowed_domains": [
+            ".example.com"
+            ]
+        },
+        "alternative_names": {
+          "allowed_domains": [
+            ".example.com"
+          ]
+        },
+        "server_group": {
+          "group_prefixes": {
+            "bk": "Bock_Team",
+            "cs": "CS_Team",
+            "gl": "Glance_Team",
+            "mb": "MB_Team",
+            "nv": "Nova_Team",
+            "ops": "SysEng_Team",
+            "qu": "Neutron_Team",
+            "sw": "Swift_Team"
+          }
+        },
+        "extensions": {
+          "allowed_extensions": [
+            "keyUsage",
+            "subjectAltName",
+            "basicConstraints",
+            "subjectKeyIdentifier"
+          ]
+        },
+        "key_usage": {
+          "allowed_usage": [
+            "Digital Signature",
+            "Key Encipherment",
+            "Non Repudiation"
+          ]
+        },
+        "ca_status": {
+          "ca_requested": false
+        },
+        "source_cidrs": {
+          "cidrs": [
+            "127.0.0.0/8"
           ]
-      },
-      "alternative_names": {
-        "allowed_domains": [
-          ".example.com"
-        ]
-      },
-      "server_group": {
-        "group_prefixes": {
-          "bk": "Bock_Team",
-          "cs": "CS_Team",
-          "gl": "Glance_Team",
-          "mb": "MB_Team",
-          "nv": "Nova_Team",
-          "ops": "SysEng_Team",
-          "qu": "Neutron_Team",
-          "sw": "Swift_Team"
         }
-      },
-      "extensions": {
-        "allowed_extensions": [
-          "keyUsage",
-          "subjectAltName",
-          "basicConstraints",
-          "subjectKeyIdentifier"
-        ]
-      },
-      "key_usage": {
-        "allowed_usage": [
-          "Digital Signature",
-          "Key Encipherment",
-          "Non Repudiation"
-        ]
-      },
-      "ca_status": {
-        "ca_requested": false
-      },
-      "source_cidrs": {
-        "cidrs": [
-          "127.0.0.0/8"
-        ]
       }
     }
   }
diff --git a/docs/api.rst b/docs/api.rst
new file mode 100644
index 0000000..2f97c19
--- /dev/null
+++ b/docs/api.rst
@@ -0,0 +1,28 @@
+API version 1
+=============
+
+The following endpoints are available in version 1 of the API.
+
+/robots.txt (GET)
+-----------------
+
+Prevents attempts to index the service.
+
+/v1/sign/<registration_authority> (POST)
+----------------------------------------
+
+Requests signing of the CSR provided in the POST parameters. The request is
+processed by the selected virtual registration authority.
+
+Request parameters
+~~~~~~~~~~~~~~~~~~
+
+* ``user``: username used in authentication (optional)
+* ``secret``: secret used in authentication
+* ``encoding``: request encoding - currently supported: "pem"
+* ``csr``: the text of the submitted CSR
+
+Result
+~~~~~~
+
+Signed certificate
diff --git a/docs/configuration.rst b/docs/configuration.rst
new file mode 100644
index 0000000..6ab6460
--- /dev/null
+++ b/docs/configuration.rst
@@ -0,0 +1,197 @@
+Configuration files
+===================
+
+Anchor is configured using two files: ``config.py`` and ``config.json``. The
+first one defines the Python and webservice related values. You can change the
+listening iterface address and port there, as well as logging details to suit
+your deployment. The second configuration defines the service behaviour at
+runtime.
+
+There are three main sections at the moment: ``authentication`` for
+authentication parameters, ``signing_ca`` for defining signing authorities, and
+``registration_authority`` for listing virtual registration authorities which
+can be selected by client requests.
+
+The main ``config.json`` structure looks like this:
+
+.. code:: json
+
+  {
+    "authentication": { ... },
+    "signing_ca": { ... },
+    "registration_authority": { ... }
+  }
+
+Each block apart from ``registration_authority`` defines a number of mapping
+from labels to definitions. Those labels can then be used in the
+``registration_authority`` block to refer to settings defined earlier.
+
+Authentication
+--------------
+
+The authentication block can define any number of authentication blocks, each
+using one specific authentication backend.
+
+Currently available authentication methods are: ``static``, ``keystone``, and
+``ldap``.
+
+Static
+~~~~~~
+
+Username and password are present in ``config.json``. This mode should be used
+only for development and testing.
+
+.. code:: json
+
+  {
+    "authentication": {
+      "method_1": {
+        "backend": "static",
+        "secret": "simplepassword",
+        "user": "myusername"
+      }
+    }
+  }
+
+Keystone
+~~~~~~~~
+
+Username is ignored, but password is a token valid in the configured keystone
+location.
+
+.. code:: json
+
+  {
+    "authentication": {
+      "method_2": {
+        "backend": "keystone",
+        "url": "https://keystone.example.com"
+      }
+    }
+  }
+
+LDAP
+~~~~
+
+Username and password are used to bind to an LDAP user in a configured domain.
+User's groups for the ``server_group`` filter are retrieved from attribute
+``memberOf`` in search for ``(sAMAccountName=username@domain)``. The search is done
+in the configured base.
+
+.. code:: json
+
+  {
+    "authentication": {
+      "method_3": {
+        "backend": "ldap",
+        "host": "ldap.example.com",
+        "base": "ou=Users,dc=example,dc=com",
+        "domain": "example.com",
+        "port": 636,
+        "ssl": true
+      }
+    }
+  }
+
+
+Signing authority
+-----------------
+
+The ``signing_ca`` section defines any number of signing authorities which can
+be referenced later on. Currently there's only one, default implementation
+which uses local files. An example configuration looks like this.
+
+.. code:: json
+
+  {
+    "signing_ca": {
+      "local": {
+        "cert_path": "CA/root-ca.crt",
+        "key_path": "CA/root-ca-unwrapped.key",
+        "output_path": "certs",
+        "signing_hash": "sha256",
+        "valid_hours": 24
+      }
+    }
+  }
+
+Parameters ``cert_path`` and ``key_path`` define the location of respectively
+the CA certificate and its private key. The location where the local copies of
+issued certificates is held is defiend by ``output_path``. The ``signing_hash``
+defines the hash used to sign the results. The validity of issued certificates
+(in hours) is set by ``valid_hours``.
+
+
+Virtual registration authority
+------------------------------
+
+The registration authority section puts together previously described elements
+and the list of validators applied to each request.
+
+.. code:: json
+
+  {
+    "registration_authority": {
+      "default": {
+        "authentication": "method_1",
+        "signing_ca": "local",
+        "validators": {
+          "ca_status": {
+            "ca_requested": false
+          },
+          "source_cidrs": {
+            "cidrs": [ "127.0.0.0/8" ]
+          }
+        }
+      }
+    }
+  }
+
+In the example above, CSRs sent to registration authority ``default`` will be
+authenticated using previously defined block ``method_1``, will be validated
+against two validators (``ca_status`` and ``source_cidrs``) and if they pass,
+the CSR will be signed by the previously defined signing ca called ``local``.
+
+Each validator has its own set of parameters described separately in the
+:doc:`validators section </validators>`.
+
+
+Example configuration
+---------------------
+
+.. code:: json
+
+  {
+    "authentication": {
+      "method_1": {
+        "backend": "static",
+        "secret": "simplepassword",
+        "user": "myusername"
+      }
+    },
+
+    "signing_ca": {
+      "local": {
+        "cert_path": "CA/root-ca.crt",
+        "key_path": "CA/root-ca-unwrapped.key",
+        "output_path": "certs",
+        "signing_hash": "sha256",
+        "valid_hours": 24
+      }
+    },
+
+    "registration_authority": {
+      "default": {
+        "authentication": "method_1",
+        "signing_ca": "local",
+        "validators": {
+          "ca_status": {
+            "ca_requested": false
+          },
+          "source_cidrs": {
+            "cidrs": [ "127.0.0.0/8" ]
+          }
+        }
+      }
+    }
+  }
diff --git a/docs/index.rst b/docs/index.rst
index 1fd702f..61de144 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -10,6 +10,9 @@ Contents:
 .. toctree::
    :maxdepth: 2
 
+   configuration
+   api
+   validators
 
 Indices and tables
 ==================
diff --git a/docs/validators.rst b/docs/validators.rst
new file mode 100644
index 0000000..231ca89
--- /dev/null
+++ b/docs/validators.rst
@@ -0,0 +1,4 @@
+Validators
+==========
+
+TODO
diff --git a/tests/__init__.py b/tests/__init__.py
index 4bceffa..8da6b99 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -34,29 +34,37 @@ class DefaultConfigMixin(object):
 
     def setUp(self):
         self.sample_conf_auth = {
-            "static": {
+            "default_auth": {
+                "backend": "static",
                 "user": "myusername",
                 "secret": "simplepassword"
             }
         }
         self.sample_conf_ca = {
-            "cert_path": "tests/CA/root-ca.crt",
-            "key_path": "tests/CA/root-ca-unwrapped.key",
-            "output_path": "certs",
-            "signing_hash": "sha256",
-            "valid_hours": 24
+            "default_ca": {
+                "cert_path": "tests/CA/root-ca.crt",
+                "key_path": "tests/CA/root-ca-unwrapped.key",
+                "output_path": "certs",
+                "signing_hash": "sha256",
+                "valid_hours": 24
+            }
         }
         self.sample_conf_validators = {
-            "steps": {
-                "common_name": {
-                    "allowed_domains": [".test.com"]
-                }
+            "common_name": {
+                "allowed_domains": [".test.com"]
+            }
+        }
+        self.sample_conf_ra = {
+            "default_ra": {
+                "authentication": "default_auth",
+                "signing_ca": "default_ca",
+                "validators": self.sample_conf_validators
             }
         }
         self.sample_conf = {
-            "auth": self.sample_conf_auth,
-            "ca": self.sample_conf_ca,
-            "validators": self.sample_conf_validators,
+            "authentication": self.sample_conf_auth,
+            "signing_ca": self.sample_conf_ca,
+            "registration_authority": self.sample_conf_ra,
         }
 
         super(DefaultConfigMixin, self).setUp()
diff --git a/tests/auth/test_static.py b/tests/auth/test_static.py
index 196f390..6959e8f 100644
--- a/tests/auth/test_static.py
+++ b/tests/auth/test_static.py
@@ -35,39 +35,33 @@ class AuthStaticTests(tests.DefaultConfigMixin, unittest.TestCase):
     def test_validate_static(self):
         """Test all static user/pass authentication paths."""
         config = "anchor.jsonloader.conf._config"
-        self.sample_conf_auth['static'] = {'secret': 'simplepassword',
-                                           'user': 'myusername'}
+        self.sample_conf_auth['default_auth'] = {
+            "backend": "static",
+            "user": "myusername",
+            "secret": "simplepassword"
+        }
         data = self.sample_conf
 
         with mock.patch.dict(config, data):
-            valid_user = data['auth']['static']['user']
-            valid_pass = data['auth']['static']['secret']
+            valid_user = self.sample_conf_auth['default_auth']['user']
+            valid_pass = self.sample_conf_auth['default_auth']['secret']
 
             expected = results.AuthDetails(username=valid_user, groups=[])
-            self.assertEqual(auth.validate(valid_user, valid_pass), expected)
+            self.assertEqual(auth.validate('default_ra', valid_user,
+                                           valid_pass), expected)
             with self.assertRaises(http_status.HTTPUnauthorized):
-                auth.validate(valid_user, 'badpass')
+                auth.validate('default_ra', valid_user, 'badpass')
             with self.assertRaises(http_status.HTTPUnauthorized):
-                auth.validate('baduser', valid_pass)
+                auth.validate('default_ra', 'baduser', valid_pass)
             with self.assertRaises(http_status.HTTPUnauthorized):
-                auth.validate('baduser', 'badpass')
+                auth.validate('default_ra', 'baduser', 'badpass')
 
     def test_validate_static_malformed1(self):
         """Test static user/pass authentication with malformed config."""
         config = "anchor.jsonloader.conf._config"
-        self.sample_conf_auth['static'] = {}
+        self.sample_conf_auth['default_auth'] = {'backend': 'static'}
         data = self.sample_conf
 
         with mock.patch.dict(config, data):
             with self.assertRaises(http_status.HTTPUnauthorized):
-                auth.validate('baduser', 'badpass')
-
-    def test_validate_static_malformed2(self):
-        """Test static user/pass authentication with malformed config."""
-        config = "anchor.jsonloader.conf._config"
-        self.sample_conf['auth'] = {}
-        data = self.sample_conf
-
-        with mock.patch.dict(config, data):
-            with self.assertRaises(http_status.HTTPUnauthorized):
-                auth.validate('baduser', 'badpass')
+                auth.validate('default_ra', 'baduser', 'badpass')
diff --git a/tests/controllers/test_app.py b/tests/controllers/test_app.py
index c4597e3..a92ff6b 100644
--- a/tests/controllers/test_app.py
+++ b/tests/controllers/test_app.py
@@ -41,8 +41,11 @@ class TestApp(tests.DefaultConfigMixin, unittest.TestCase):
     @mock.patch('anchor.app._check_file_exists')
     @mock.patch('anchor.app._check_file_permissions')
     def test_config_check_domains_good(self, a, b):
-        steps = self.sample_conf_validators['steps']
-        steps['common_name']['allowed_domains'] = ['.test.com']
+        self.sample_conf_ra['default_ra']['validators'] = {
+            "common_name": {
+                "allowed_domains": [".test.com"]
+            }
+        }
         config = json.dumps(self.sample_conf)
         jsonloader.conf.load_str_data(config)
 
@@ -53,8 +56,11 @@ class TestApp(tests.DefaultConfigMixin, unittest.TestCase):
     @mock.patch('anchor.app._check_file_exists')
     @mock.patch('anchor.app._check_file_permissions')
     def test_config_check_domains_bad(self, a, b):
-        steps = self.sample_conf_validators['steps']
-        steps['common_name']['allowed_domains'] = ['error.test.com']
+        self.sample_conf_ra['default_ra']['validators'] = {
+            "common_name": {
+                "allowed_domains": ["error.test.com"]
+            }
+        }
         config = json.dumps(self.sample_conf)
         jsonloader.conf.load_str_data(config)
 
@@ -77,24 +83,74 @@ class TestApp(tests.DefaultConfigMixin, unittest.TestCase):
             self.assertRaises(app.ConfigValidationException,
                               app._check_file_permissions, "/mock/path")
 
-    def test_validate_config_no_auth(self):
-        del self.sample_conf['auth']
+    def test_validate_old_config(self):
+        config = json.dumps({
+            "ca": {},
+            "auth": {},
+            "validators": {},
+        })
+        jsonloader.conf.load_str_data(config)
+        self.assertRaisesRegexp(app.ConfigValidationException,
+                                "old version of Anchor",
+                                app.validate_config, jsonloader.conf)
+
+    @mock.patch('anchor.app._check_file_permissions')
+    def test_validate_config_no_registration_authorities(self,
+                                                         mock_check_perm):
+        del self.sample_conf['registration_authority']
         config = json.dumps(self.sample_conf)
         jsonloader.conf.load_str_data(config)
         self.assertRaisesRegexp(app.ConfigValidationException,
-                                "No authentication configured",
+                                "No registration authorities present",
+                                app.validate_config, jsonloader.conf)
+
+    @mock.patch('anchor.app._check_file_permissions')
+    def test_validate_config_no_auth(self, mock_check_perm):
+        del self.sample_conf['authentication']
+        config = json.dumps(self.sample_conf)
+        jsonloader.conf.load_str_data(config)
+        self.assertRaisesRegexp(app.ConfigValidationException,
+                                "No authentication methods present",
+                                app.validate_config, jsonloader.conf)
+
+    @mock.patch('anchor.app._check_file_permissions')
+    def test_validate_config_no_auth_backend(self, mock_check_perm):
+        del self.sample_conf_auth['default_auth']['backend']
+        config = json.dumps(self.sample_conf)
+        jsonloader.conf.load_str_data(config)
+        self.assertRaisesRegexp(app.ConfigValidationException,
+                                "Authentication method .* doesn't define "
+                                "backend",
+                                app.validate_config, jsonloader.conf)
+
+    @mock.patch('anchor.app._check_file_permissions')
+    def test_validate_config_no_ra_auth(self, mock_check_perm):
+        del self.sample_conf_ra['default_ra']['authentication']
+        config = json.dumps(self.sample_conf)
+        jsonloader.conf.load_str_data(config)
+        self.assertRaisesRegexp(app.ConfigValidationException,
+                                "No authentication .* for .* default_ra",
                                 app.validate_config, jsonloader.conf)
 
     def test_validate_config_no_ca(self):
-        del self.sample_conf['ca']
+        del self.sample_conf['signing_ca']
         config = json.dumps(self.sample_conf)
         jsonloader.conf.load_str_data(config)
-
         self.assertRaisesRegexp(app.ConfigValidationException,
-                                "No ca configuration present",
+                                "No signing CA configurations present",
                                 app.validate_config, jsonloader.conf)
 
-    def test_validate_config_ca_config_reqs(self):
+    @mock.patch('anchor.app._check_file_permissions')
+    def test_validate_config_no_ra_ca(self, mock_check_perm):
+        del self.sample_conf_ra['default_ra']['signing_ca']
+        config = json.dumps(self.sample_conf)
+        jsonloader.conf.load_str_data(config)
+        self.assertRaisesRegexp(app.ConfigValidationException,
+                                "No signing CA .* for .* default_ra",
+                                app.validate_config, jsonloader.conf)
+
+    @mock.patch('anchor.app._check_file_permissions')
+    def test_validate_config_ca_config_reqs(self, mock_check_perm):
         ca_config_requirements = ["cert_path", "key_path", "output_path",
                                   "signing_hash", "valid_hours"]
 
@@ -118,11 +174,13 @@ class TestApp(tests.DefaultConfigMixin, unittest.TestCase):
                                 "could not read file: tests/CA/root-ca.crt",
                                 app.validate_config, jsonloader.conf)
 
+    @mock.patch('anchor.app._check_file_permissions')
     @mock.patch('os.path.isfile')
     @mock.patch('os.access')
     @mock.patch('os.stat')
-    def test_validate_config_no_validators(self, stat, access, isfile):
-        del self.sample_conf['validators']
+    def test_validate_config_no_validators(self, stat, access, isfile,
+                                           mock_check_perm):
+        self.sample_conf_ra['default_ra']['validators'] = {}
         config = json.dumps(self.sample_conf)
         jsonloader.conf.load_str_data(config)
         isfile.return_value = True
@@ -132,45 +190,35 @@ class TestApp(tests.DefaultConfigMixin, unittest.TestCase):
                                 "No validators configured",
                                 app.validate_config, jsonloader.conf)
 
+    @mock.patch('anchor.app._check_file_permissions')
     @mock.patch('os.path.isfile')
     @mock.patch('os.access')
     @mock.patch('os.stat')
-    def test_validate_config_no_validator_steps(self, stat, access, isfile):
-        del self.sample_conf_validators['steps']
-        self.sample_conf_validators['no_steps'] = {}
+    def test_validate_config_unknown_validator(self, stat, access, isfile,
+                                               mock_check_perm):
+        self.sample_conf_validators['unknown_validator'] = {}
         config = json.dumps(self.sample_conf)
         jsonloader.conf.load_str_data(config)
         isfile.return_value = True
         access.return_value = True
         stat.return_value.st_mode = self.expected_key_permissions
-        self.assertRaisesRegexp(app.ConfigValidationException,
-                                "Validator set <no_steps> is empty",
-                                app.validate_config, jsonloader.conf)
+        with self.assertRaises(app.ConfigValidationException,
+                               msg="Unknown validator <unknown_validator> "
+                                   "found (for registration authority "
+                                   "default)"):
+            app.validate_config(jsonloader.conf)
 
+    @mock.patch('anchor.app._check_file_permissions')
     @mock.patch('os.path.isfile')
     @mock.patch('os.access')
     @mock.patch('os.stat')
-    def test_validate_config_unknown_validator(self, stat, access, isfile):
-        self.sample_conf_validators['steps']['unknown_validator'] = {}
-        config = json.dumps(self.sample_conf)
-        jsonloader.conf.load_str_data(config)
-        isfile.return_value = True
-        access.return_value = True
-        stat.return_value.st_mode = self.expected_key_permissions
-        self.assertRaisesRegexp(app.ConfigValidationException,
-                                "Validator set <steps> contains an "
-                                "unknown validator <unknown_validator>",
-                                app.validate_config, jsonloader.conf)
-
-    @mock.patch('os.path.isfile')
-    @mock.patch('os.access')
-    @mock.patch('os.stat')
-    def test_validate_config_good(self, stat, access, isfile):
+    def test_validate_config_good(self, stat, access, isfile, mock_check_perm):
         config = json.dumps(self.sample_conf)
         jsonloader.conf.load_str_data(config)
         isfile.return_value = True
         access.return_value = True
         stat.return_value.st_mode = self.expected_key_permissions
+        app.validate_config(jsonloader.conf)
 
     @mock.patch('anchor.jsonloader.conf.load_file_data')
     def test_config_paths_env(self, conf):
diff --git a/tests/test_certificate_ops.py b/tests/test_certificate_ops.py
index 38dcf2f..1509d11 100644
--- a/tests/test_certificate_ops.py
+++ b/tests/test_certificate_ops.py
@@ -104,59 +104,63 @@ class CertificateOpsTests(tests.DefaultConfigMixin, unittest.TestCase):
         """Test basic success path for validate_csr."""
         csr_obj = certificate_ops.parse_csr(self.csr, 'pem')
         config = "anchor.jsonloader.conf._config"
-        self.sample_conf_validators['steps'] = {'extensions': {
+        self.sample_conf_ra['default_ra']['validators'] = {'extensions': {
             'allowed_extensions': []}}
         data = self.sample_conf
 
         with mock.patch.dict(config, data):
-            certificate_ops.validate_csr(None, csr_obj, None)
+            certificate_ops.validate_csr('default_ra', None, csr_obj, None)
 
     def test_validate_csr_bypass(self):
         """Test empty validator set for validate_csr."""
         csr_obj = certificate_ops.parse_csr(self.csr, 'pem')
         config = "anchor.jsonloader.conf._config"
-        self.sample_conf['validators'] = {}
+        self.sample_conf_ra['default_ra']['validators'] = {}
         data = self.sample_conf
 
         with mock.patch.dict(config, data):
             # this should work, it allows people to bypass validation
-            certificate_ops.validate_csr(None, csr_obj, None)
+            certificate_ops.validate_csr('default_ra', None, csr_obj, None)
 
     def test_validate_csr_fail(self):
         """Test failure path for validate_csr."""
         csr_obj = certificate_ops.parse_csr(self.csr, 'pem')
         config = "anchor.jsonloader.conf._config"
-        self.sample_conf_validators['steps'] = {'common_name': {
-            'allowed_domains': ['.testing.com']}}
+        self.sample_conf_ra['default_ra']['validators'] = {
+            'common_name': {
+                'allowed_domains': ['.testing.com']
+            }
+        }
         data = self.sample_conf
 
         with mock.patch.dict(config, data):
             with self.assertRaises(http_status.HTTPException) as cm:
-                certificate_ops.validate_csr(None, csr_obj, None)
+                certificate_ops.validate_csr('default_ra', None, csr_obj, None)
         self.assertEqual(cm.exception.code, 400)
 
     def test_ca_cert_read_failure(self):
         """Test CA certificate read failure."""
         csr_obj = certificate_ops.parse_csr(self.csr, 'pem')
         config = "anchor.jsonloader.conf._config"
-        self.sample_conf_ca['cert_path'] = '/xxx/not/a/valid/path'
-        self.sample_conf_ca['key_path'] = 'tests/CA/root-ca-unwrapped.key'
+        ca_conf = self.sample_conf_ca['default_ca']
+        ca_conf['cert_path'] = '/xxx/not/a/valid/path'
+        ca_conf['key_path'] = 'tests/CA/root-ca-unwrapped.key'
         data = self.sample_conf
 
         with mock.patch.dict(config, data):
             with self.assertRaises(http_status.HTTPException) as cm:
-                certificate_ops.sign(csr_obj)
+                certificate_ops.sign('default_ra', csr_obj)
         self.assertEqual(cm.exception.code, 500)
 
     def test_ca_key_read_failure(self):
         """Test CA key read failure."""
         csr_obj = certificate_ops.parse_csr(self.csr, 'pem')
         config = "anchor.jsonloader.conf._config"
-        self.sample_conf_ca['cert_path'] = 'tests/CA/root-ca.crt'
-        self.sample_conf_ca['key_path'] = '/xxx/not/a/valid/path'
+        self.sample_conf_ca['default_ca']['cert_path'] = 'tests/CA/root-ca.crt'
+        self.sample_conf_ca['default_ca']['key_path'] = '/xxx/not/a/valid/path'
         data = self.sample_conf
 
         with mock.patch.dict(config, data):
             with self.assertRaises(http_status.HTTPException) as cm:
-                certificate_ops.sign(csr_obj)
+                certificate_ops.sign('default_ra', csr_obj)
         self.assertEqual(cm.exception.code, 500)
diff --git a/tests/test_config.py b/tests/test_config.py
new file mode 100644
index 0000000..7f25839
--- /dev/null
+++ b/tests/test_config.py
@@ -0,0 +1,98 @@
+# -*- coding:utf-8 -*-
+#
+# Copyright 2015 Hewlett-Packard Development Company, L.P.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+from anchor import jsonloader
+
+import json
+import logging
+import sys
+import unittest
+
+import mock
+
+import tests
+
+
+logger = logging.getLogger(__name__)
+
+# find the class representing an open file; it depends on the python version
+# it's used later for mocking
+if sys.version_info[0] < 3:
+    file_class = file  # noqa
+else:
+    import _io
+    file_class = _io.TextIOWrapper
+
+
+class TestConfig(tests.DefaultConfigMixin, unittest.TestCase):
+    def test_wrong_key(self):
+        """Wrong config key should raise the right error."""
+        jsonloader.conf = jsonloader.AnchorConf(logger)
+
+        with self.assertRaises(AttributeError):
+            jsonloader.conf.abcdef
+
+    def test_load_file(self):
+        """Test loading of a correct configuration."""
+        jsonloader.conf = jsonloader.AnchorConf(logger)
+
+        open_name = 'anchor.jsonloader.open'
+        with mock.patch(open_name, create=True) as mock_open:
+            mock_open.return_value = mock.MagicMock(spec=file_class)
+            m_file = mock_open.return_value.__enter__.return_value
+            m_file.read.return_value = json.dumps(self.sample_conf)
+
+            jsonloader.conf.load_file_data('/tmp/impossible_path')
+
+        self.assertEqual(
+            (jsonloader.conf.registration_authority['default_ra']
+                ['authentication']),
+            'default_auth')
+        self.assertEqual(
+            jsonloader.conf.signing_ca['default_ca']['valid_hours'],
+            24)
+
+    def test_load_file_cant_open(self):
+        """Test failures when opening files."""
+        jsonloader.conf = jsonloader.AnchorConf(logger)
+
+        open_name = 'anchor.jsonloader.open'
+        with mock.patch(open_name, create=True) as mock_open:
+            mock_open.return_value = mock.MagicMock(spec=file_class)
+            mock_open.side_effect = IOError("can't open file")
+
+            with self.assertRaises(IOError):
+                jsonloader.conf.load_file_data('/tmp/impossible_path')
+
+    def test_load_file_cant_parse(self):
+        """Test failues when parsing json format."""
+        jsonloader.conf = jsonloader.AnchorConf(logger)
+
+        open_name = 'anchor.jsonloader.open'
+        with mock.patch(open_name, create=True) as mock_open:
+            mock_open.return_value = mock.MagicMock(spec=file_class)
+            m_file = mock_open.return_value.__enter__.return_value
+            m_file.read.return_value = "{{{{ bad json"
+
+            with self.assertRaises(ValueError):
+                jsonloader.conf.load_file_data('/tmp/impossible_path')
+
+    def test_registration_authority_names(self):
+        """Instances should be listed once config is loaded."""
+        jsonloader.conf = jsonloader.AnchorConf(logger)
+        jsonloader.conf.load_str_data(json.dumps(self.sample_conf))
+        self.assertEqual(list(jsonloader.registration_authority_names()),
+                         ['default_ra'])
diff --git a/tests/test_functional.py b/tests/test_functional.py
index 7b12c96..13816fd 100644
--- a/tests/test_functional.py
+++ b/tests/test_functional.py
@@ -76,12 +76,13 @@ class TestFunctional(tests.DefaultConfigMixin, unittest.TestCase):
 
         # Load config from json test config
         jsonloader.conf.load_str_data(json.dumps(self.sample_conf))
-        self.conf = getattr(jsonloader.conf, "_config")
-        self.conf["ca"]["output_path"] = tempfile.mkdtemp()
+        self.conf = jsonloader.conf._config
+        ca_conf = self.conf["signing_ca"]["default_ca"]
+        ca_conf["output_path"] = tempfile.mkdtemp()
 
         # Set CA file permissions
-        os.chmod(self.conf["ca"]["cert_path"], stat.S_IRUSR | stat.S_IFREG)
-        os.chmod(self.conf["ca"]["key_path"], stat.S_IRUSR | stat.S_IFREG)
+        os.chmod(ca_conf["cert_path"], stat.S_IRUSR | stat.S_IFREG)
+        os.chmod(ca_conf["key_path"], stat.S_IRUSR | stat.S_IFREG)
 
         app_conf = {"app": copy.deepcopy(config.app),
                     "logging": copy.deepcopy(config.logging)}
@@ -92,7 +93,7 @@ class TestFunctional(tests.DefaultConfigMixin, unittest.TestCase):
         self.app.reset()
 
     def test_check_unauthorised(self):
-        resp = self.app.post('/sign', expect_errors=True)
+        resp = self.app.post('/v1/sign/default_ra', expect_errors=True)
         self.assertEqual(401, resp.status_int)
 
     def test_robots(self):
@@ -105,16 +106,25 @@ class TestFunctional(tests.DefaultConfigMixin, unittest.TestCase):
                 'secret': 'simplepassword',
                 'encoding': 'pem'}
 
-        resp = self.app.post('/sign', data, expect_errors=True)
+        resp = self.app.post('/v1/sign/default_ra', data, expect_errors=True)
         self.assertEqual(400, resp.status_int)
 
+    def test_check_unknown_instance(self):
+        data = {'user': 'myusername',
+                'secret': 'simplepassword',
+                'encoding': 'pem',
+                'csr': TestFunctional.csr_good}
+
+        resp = self.app.post('/v1/sign/unknown', data, expect_errors=True)
+        self.assertEqual(404, resp.status_int)
+
     def test_check_bad_csr(self):
         data = {'user': 'myusername',
                 'secret': 'simplepassword',
                 'encoding': 'pem',
                 'csr': TestFunctional.csr_bad}
 
-        resp = self.app.post('/sign', data, expect_errors=True)
+        resp = self.app.post('/v1/sign/default_ra', data, expect_errors=True)
         self.assertEqual(400, resp.status_int)
 
     def test_check_good_csr(self):
@@ -123,7 +133,7 @@ class TestFunctional(tests.DefaultConfigMixin, unittest.TestCase):
                 'encoding': 'pem',
                 'csr': TestFunctional.csr_good}
 
-        resp = self.app.post('/sign', data, expect_errors=False)
+        resp = self.app.post('/v1/sign/default_ra', data, expect_errors=False)
         self.assertEqual(200, resp.status_int)
 
         cert = X509_cert.X509Certificate.from_buffer(resp.text)
@@ -147,10 +157,11 @@ class TestFunctional(tests.DefaultConfigMixin, unittest.TestCase):
             raise Exception("BOOM")
 
         validators.broken_validator = derp
-        jsonloader.conf.validators["steps"]["broken_validator"] = {}
+        ra = jsonloader.conf.registration_authority['default_ra']
+        ra['validators']["broken_validator"] = {}
 
-        resp = self.app.post('/sign', data, expect_errors=True)
+        resp = self.app.post('/v1/sign/default_ra', data, expect_errors=True)
         self.assertEqual(500, resp.status_int)
-        self.assertTrue(("Internal Validation Error running "
-                         "validator 'broken_validator' "
-                         "in set 'steps'") in str(resp))
+        self.assertTrue(("Internal Validation Error running validator "
+                         "'broken_validator' for registration authority "
+                         "'default_ra'") in str(resp))