Synchronizing custom SCIM user attributes to Genesys Cloud routing skills using a Python script and the SCIM 2.0 Patch API

What You Will Build

• A Python script that reads external employee records, maps department and role fields to custom SCIM attributes, and applies them to Genesys Cloud users via the SCIM 2.0 PATCH endpoint.
• This uses the Genesys Cloud SCIM 2.0 API with direct HTTP requests and the requests library.
• The implementation covers Python 3.9+ with type hints, production-grade retry logic, and explicit error handling.

Prerequisites

• OAuth 2.0 Client Credentials grant configured in Genesys Cloud with scim:users:write and scim:users:read scopes
• Genesys Cloud REST API v2 and SCIM 2.0 API enabled for your environment
• Python 3.9+ runtime
• requests>=2.31.0 installed via pip
• Environment variables set for GENESYS_REGION, GENESYS_CLIENT_ID, and GENESYS_CLIENT_SECRET

Authentication Setup

Genesys Cloud uses the OAuth 2.0 Client Credentials flow for server-to-server integrations. The token endpoint returns a bearer token valid for one hour. You must cache the token and request a new one when it expires or when you receive a 401 Unauthorized response.

import os
import time
import requests
from typing import Optional

class GenesysAuth:
    def __init__(self, region: str, client_id: str, client_secret: str):
        self.region = region
        self.client_id = client_id
        self.client_secret = client_secret
        self.token_url = f"https://api.{region}.mypurecloud.com/oauth/token"
        self._token: Optional[str] = None
        self._expires_at: float = 0

    def get_token(self) -> str:
        if self._token and time.time() < self._expires_at - 60:
            return self._token

        payload = {
            "grant_type": "client_credentials",
            "client_id": self.client_id,
            "client_secret": self.client_secret,
            "scope": "scim:users:write scim:users:read"
        }

        response = requests.post(self.token_url, data=payload, timeout=10)
        response.raise_for_status()

        data = response.json()
        self._token = data["access_token"]
        self._expires_at = time.time() + data["expires_in"]
        return self._token

The request sends POST https://api.{region}.mypurecloud.com/oauth/token with form-urlencoded data. The response returns a JSON object containing access_token, token_type, expires_in, and scope. The code caches the token and subtracts sixty seconds from the expiration window to prevent edge-case timeout failures during API calls.

Implementation

Step 1: Construct the SCIM 2.0 PATCH Payload

The SCIM 2.0 specification requires a specific JSON structure for patch operations. Genesys Cloud extends the standard schema with a custom attributes extension. You must target the exact schema URI and provide an array of attribute objects containing name and value pairs.

import json
from typing import Dict, List, Any

def build_scim_patch_payload(employee_data: Dict[str, str]) -> Dict[str, Any]:
    """
    Converts flat employee data into a SCIM 2.0 PatchOp payload.
    Maps external fields to Genesys Cloud custom attributes.
    """
    custom_attrs: List[Dict[str, str]] = []

    mapping = {
        "department": "department",
        "role_level": "clearance_level",
        "location_code": "region"
    }

    for external_key, scim_name in mapping.items():
        if external_key in employee_data and employee_data[external_key]:
            custom_attrs.append({
                "name": scim_name,
                "value": employee_data[external_key]
            })

    if not custom_attrs:
        raise ValueError("No valid attributes to patch. Ensure input data matches expected keys.")

    payload: Dict[str, Any] = {
        "Operations": [
            {
                "op": "replace",
                "path": "urn:ietf:params:scim:schemas:extension:genesyscloud:2.0:User:customAttributes",
                "value": {
                    "attributes": custom_attrs
                }
            }
        ]
    }

    return payload

The payload structure matches the SCIM RFC 7644 specification. The op field uses replace to overwrite existing custom attributes for this extension. If you need to append attributes without overwriting, change op to add and adjust the path accordingly. The path field targets the Genesys Cloud custom attributes extension schema. The value field contains the attributes array that Genesys provisioning rules evaluate to assign routing skills.

Step 2: Execute the SCIM PATCH Request with Retry Logic

Genesys Cloud enforces strict rate limits on SCIM endpoints. A production script must handle 429 Too Many Requests responses with exponential backoff. You must also set the correct Content-Type and Accept headers for SCIM.

import logging
import time
from requests import Response

logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

def patch_scim_user(
    auth: GenesysAuth,
    region: str,
    user_id: str,
    payload: Dict[str, Any]
) -> Response:
    """
    Sends the SCIM PATCH request with built-in retry logic for 429s.
    """
    base_url = f"https://api.{region}.mypurecloud.com"
    endpoint = f"/scim/v2/Users/{user_id}"
    url = f"{base_url}{endpoint}"

    headers = {
        "Authorization": f"Bearer {auth.get_token()}",
        "Content-Type": "application/scim+json",
        "Accept": "application/scim+json",
        "Accept-Language": "en-US"
    }

    max_retries = 4
    base_delay = 1.5

    for attempt in range(max_retries):
        try:
            logger.info("PATCH %s | Attempt %d", endpoint, attempt + 1)
            logger.debug("Request Body: %s", json.dumps(payload, indent=2))

            response = requests.patch(url, headers=headers, json=payload, timeout=15)

            if response.status_code == 429:
                retry_after = float(response.headers.get("Retry-After", base_delay * (2 ** attempt)))
                logger.warning("429 Rate Limited. Retrying after %.1f seconds.", retry_after)
                time.sleep(retry_after)
                continue

            response.raise_for_status()
            logger.info("SCIM PATCH successful. Status: %d", response.status_code)
            return response

        except requests.exceptions.HTTPError as http_err:
            if response.status_code in (401, 403):
                logger.error("Authentication/Authorization failed: %s", http_err)
                raise
            if response.status_code == 404:
                logger.error("User %s not found in Genesys Cloud.", user_id)
                raise
            logger.error("HTTP Error %d: %s", response.status_code, response.text)
            raise
        except requests.exceptions.RequestException as req_err:
            logger.error("Request failed: %s", req_err)
            raise

    raise RuntimeError("Max retries exceeded for SCIM PATCH operation.")

The function sends PATCH https://api.{region}.mypurecloud.com/scim/v2/Users/{userId}. The headers explicitly declare application/scim+json. The retry loop checks for 429 status codes, reads the Retry-After header if present, and applies exponential backoff. The function raises exceptions for 401, 403, and 404 to fail fast on authentication or missing user errors. A successful response returns 200 OK with the updated SCIM user representation.

Step 3: Verify Routing Skill Assignment

Genesys Cloud does not assign routing skills directly through the SCIM API. Instead, provisioning rules in the Genesys Cloud admin console evaluate the custom attributes you push via SCIM and assign the corresponding routing skills. You must verify the synchronization by querying the user’s routing skills endpoint.

def verify_routing_skills(
    auth: GenesysAuth,
    region: str,
    user_id: str
) -> Dict[str, Any]:
    """
    Fetches the current routing skills assigned to the user.
    Confirms that SCIM custom attributes triggered the expected skill assignments.
    """
    url = f"https://api.{region}.mypurecloud.com/api/v2/users/{user_id}/routing/skills"
    headers = {
        "Authorization": f"Bearer {auth.get_token()}",
        "Accept": "application/json"
    }

    response = requests.get(url, headers=headers, timeout=10)
    response.raise_for_status()

    skills_data = response.json()
    logger.info("Verified routing skills for user %s:", user_id)
    for skill in skills_data.get("entities", []):
        logger.info("  - Skill: %s | Proficiency: %s", skill["skill"]["name"], skill["proficiencyLevel"]["name"])

    return skills_data

The request sends GET https://api.{region}.mypurecloud.com/api/v2/users/{userId}/routing/skills. The response contains an entities array where each object represents a skill assignment. The skill object contains the skill identifier and name. The proficiencyLevel object contains the assigned proficiency. If your provisioning rules map the department custom attribute to a specific routing skill, you will see that skill appear in this response after the SCIM PATCH completes.

Complete Working Example

Copy the following script into a file named sync_scim_skills.py. Set the required environment variables before execution. The script reads a sample employee record, patches the SCIM attributes, and verifies the routing skill assignment.

import os
import json
import logging
import time
import requests
from typing import Dict, List, Any, Optional

logging.basicConfig(level=logging.INFO, format="%(asctime)s [%(levelname)s] %(message)s")
logger = logging.getLogger(__name__)

class GenesysAuth:
    def __init__(self, region: str, client_id: str, client_secret: str):
        self.region = region
        self.client_id = client_id
        self.client_secret = client_secret
        self.token_url = f"https://api.{region}.mypurecloud.com/oauth/token"
        self._token: Optional[str] = None
        self._expires_at: float = 0

    def get_token(self) -> str:
        if self._token and time.time() < self._expires_at - 60:
            return self._token

        payload = {
            "grant_type": "client_credentials",
            "client_id": self.client_id,
            "client_secret": self.client_secret,
            "scope": "scim:users:write scim:users:read"
        }

        response = requests.post(self.token_url, data=payload, timeout=10)
        response.raise_for_status()

        data = response.json()
        self._token = data["access_token"]
        self._expires_at = time.time() + data["expires_in"]
        return self._token


def build_scim_patch_payload(employee_data: Dict[str, str]) -> Dict[str, Any]:
    custom_attrs: List[Dict[str, str]] = []
    mapping = {
        "department": "department",
        "role_level": "clearance_level",
        "location_code": "region"
    }

    for external_key, scim_name in mapping.items():
        if external_key in employee_data and employee_data[external_key]:
            custom_attrs.append({"name": scim_name, "value": employee_data[external_key]})

    if not custom_attrs:
        raise ValueError("No valid attributes to patch.")

    return {
        "Operations": [
            {
                "op": "replace",
                "path": "urn:ietf:params:scim:schemas:extension:genesyscloud:2.0:User:customAttributes",
                "value": {"attributes": custom_attrs}
            }
        ]
    }


def patch_scim_user(auth: GenesysAuth, region: str, user_id: str, payload: Dict[str, Any]) -> requests.Response:
    url = f"https://api.{region}.mypurecloud.com/scim/v2/Users/{user_id}"
    headers = {
        "Authorization": f"Bearer {auth.get_token()}",
        "Content-Type": "application/scim+json",
        "Accept": "application/scim+json",
        "Accept-Language": "en-US"
    }

    max_retries = 4
    base_delay = 1.5

    for attempt in range(max_retries):
        try:
            logger.info("PATCH /scim/v2/Users/%s | Attempt %d", user_id, attempt + 1)
            response = requests.patch(url, headers=headers, json=payload, timeout=15)

            if response.status_code == 429:
                retry_after = float(response.headers.get("Retry-After", base_delay * (2 ** attempt)))
                logger.warning("429 Rate Limited. Retrying after %.1f seconds.", retry_after)
                time.sleep(retry_after)
                continue

            response.raise_for_status()
            logger.info("SCIM PATCH successful. Status: %d", response.status_code)
            return response

        except requests.exceptions.HTTPError as http_err:
            if response.status_code in (401, 403):
                logger.error("Authentication/Authorization failed: %s", http_err)
                raise
            if response.status_code == 404:
                logger.error("User %s not found in Genesys Cloud.", user_id)
                raise
            logger.error("HTTP Error %d: %s", response.status_code, response.text)
            raise
        except requests.exceptions.RequestException as req_err:
            logger.error("Request failed: %s", req_err)
            raise

    raise RuntimeError("Max retries exceeded for SCIM PATCH operation.")


def verify_routing_skills(auth: GenesysAuth, region: str, user_id: str) -> Dict[str, Any]:
    url = f"https://api.{region}.mypurecloud.com/api/v2/users/{user_id}/routing/skills"
    headers = {
        "Authorization": f"Bearer {auth.get_token()}",
        "Accept": "application/json"
    }

    response = requests.get(url, headers=headers, timeout=10)
    response.raise_for_status()

    skills_data = response.json()
    logger.info("Verified routing skills for user %s:", user_id)
    for skill in skills_data.get("entities", []):
        logger.info("  - Skill: %s | Proficiency: %s", skill["skill"]["name"], skill["proficiencyLevel"]["name"])

    return skills_data


if __name__ == "__main__":
    REGION = os.getenv("GENESYS_REGION", "us-east-1")
    CLIENT_ID = os.getenv("GENESYS_CLIENT_ID")
    CLIENT_SECRET = os.getenv("GENESYS_CLIENT_SECRET")
    TARGET_USER_ID = os.getenv("GENESYS_USER_ID", "00000000-0000-0000-0000-000000000000")

    if not all([CLIENT_ID, CLIENT_SECRET]):
        raise EnvironmentError("Missing required environment variables: GENESYS_CLIENT_ID, GENESYS_CLIENT_SECRET")

    auth = GenesysAuth(REGION, CLIENT_ID, CLIENT_SECRET)

    external_employee_record = {
        "employee_id": "EMP-8842",
        "department": "Support-Tier2",
        "role_level": "Level3",
        "location_code": "US-East",
        "manager": "Jane Doe"
    }

    try:
        payload = build_scim_patch_payload(external_employee_record)
        logger.info("Constructed SCIM payload: %s", json.dumps(payload, indent=2))

        patch_scim_user(auth, REGION, TARGET_USER_ID, payload)

        logger.info("Waiting 3 seconds for Genesys provisioning rules to evaluate...")
        time.sleep(3)

        verify_routing_skills(auth, REGION, TARGET_USER_ID)

    except Exception as e:
        logger.error("Synchronization failed: %s", e)
        exit(1)

Common Errors & Debugging

Error: 400 Bad Request - Invalid SCIM Patch Operation

• What causes it: The Operations array is missing, the op field contains an invalid value, or the path URI does not match the Genesys Cloud custom attributes schema.
• How to fix it: Verify the payload matches the exact structure shown in Step 1. Ensure op is replace or add. Ensure path is exactly urn:ietf:params:scim:schemas:extension:genesyscloud:2.0:User:customAttributes.
• Code showing the fix: The build_scim_patch_payload function enforces the correct structure. If you modify it, validate the JSON against the SCIM 2.0 PatchOp RFC.

Error: 403 Forbidden - Insufficient OAuth Scope

• What causes it: The OAuth client lacks scim:users:write scope, or the token was requested with an outdated scope list.
• How to fix it: Navigate to the Genesys Cloud admin console, open the OAuth client configuration, and add scim:users:write to the allowed scopes. Regenerate the client secret if required.
• Code showing the fix: The GenesysAuth class explicitly requests scim:users:write scim:users:read in the token payload. If you change the scope string, the server will reject subsequent PATCH requests.

Error: 429 Too Many Requests - Rate Limit Exceeded

• What causes it: The script sends requests faster than the Genesys Cloud SCIM endpoint allows. SCIM endpoints typically enforce a lower rate limit than standard REST endpoints.
• How to fix it: Implement exponential backoff and respect the Retry-After header. The patch_scim_user function includes a retry loop that handles this automatically.
• Code showing the fix: The retry logic in Step 2 checks response.status_code == 429, parses Retry-After, and sleeps before the next attempt. Increase max_retries if your batch size is large.

Error: 404 Not Found - User ID Invalid

• What causes it: The user_id passed to the SCIM endpoint does not match a user in your Genesys Cloud environment, or you are using the external HRIS ID instead of the internal Genesys UUID.
• How to fix it: Use the Genesys Cloud internal user identifier. You can map external IDs to internal IDs using the /api/v2/users/search endpoint before calling the SCIM PATCH.
• Code showing the fix: Replace TARGET_USER_ID with the actual UUID. If you must search first, add a requests.get call to /api/v2/users/search?query=externalId:"EMP-8842" and extract the id field from the response.

Official References

• Genesys Cloud SCIM 2.0 API Documentation
• OAuth 2.0 Client Credentials Grant
• SCIM 2.0 Patch Operation Specification
• Genesys Cloud Routing Skills API
• Python requests Library Documentation