Manipulating Genesys Cloud Voice API ANI Routing Parameters via Python

What You Will Build

A Python module that programmatically updates ANI/DNIS routing parameters for outbound campaigns and telephony providers, validates number formats against STIR/SHAKEN constraints, executes atomic PATCH operations with retry logic, and generates audit logs. This tutorial uses the Genesys Cloud CX Outbound and Telephony Provider APIs with httpx for direct HTTP control. The implementation runs in Python 3.10+ and requires no external orchestration tools.

Prerequisites

• OAuth Client Credentials flow configured in Genesys Cloud CX
• Required scopes: outbound:campaign:write, outbound:contactlist:write, telephony:provider:write, outbound:campaign:read, outbound:contactlist:read
• Python 3.10 or newer
• Dependencies: httpx==0.27.0, pydantic==2.6.0, pydantic[email], pytz==2024.1
• A valid Genesys Cloud CX environment ID and API client credentials

Authentication Setup

Genesys Cloud CX uses OAuth 2.0 Client Credentials for server-to-server integrations. The token endpoint returns a JWT that expires after 24 hours. You must cache the token and refresh it before expiration to avoid 401 interruptions.

import httpx
import time
from typing import Optional

class GenesysAuthManager:
    def __init__(self, base_url: str, client_id: str, client_secret: str):
        self.base_url = base_url.rstrip("/")
        self.client_id = client_id
        self.client_secret = client_secret
        self._token: Optional[str] = None
        self._expires_at: float = 0.0

    def get_token(self) -> str:
        if self._token and time.time() < self._expires_at - 300:
            return self._token
        
        url = f"{self.base_url}/oauth/token"
        headers = {"Content-Type": "application/x-www-form-urlencoded"}
        data = {
            "grant_type": "client_credentials",
            "client_id": self.client_id,
            "client_secret": self.client_secret
        }

        response = httpx.post(url, headers=headers, data=data)
        response.raise_for_status()
        payload = response.json()
        
        self._token = payload["access_token"]
        self._expires_at = time.time() + payload["expires_in"] - 300
        return self._token

Implementation

Step 1: Initialize Client and Fetch Current ANI Routing Configuration

You must retrieve the current campaign or contact list configuration before applying rewrite directives. The Genesys Cloud CX Outbound API returns routing parameters in nested objects. You will use httpx to fetch the baseline state.

import httpx
from typing import Any, Dict

class ANIRoutingClient:
    def __init__(self, base_url: str, auth_manager: GenesysAuthManager):
        self.base_url = base_url.rstrip("/")
        self.auth = auth_manager
        self.client = httpx.Client(timeout=30.0)

    def _headers(self) -> Dict[str, str]:
        return {
            "Authorization": f"Bearer {self.auth.get_token()}",
            "Content-Type": "application/json"
        }

    def fetch_campaign_config(self, campaign_id: str) -> Dict[str, Any]:
        path = f"/api/v2/outbound/campaigns/{campaign_id}"
        response = self.client.get(f"{self.base_url}{path}", headers=self._headers())
        response.raise_for_status()
        return response.json()

    def fetch_contact_list_config(self, contact_list_id: str) -> Dict[str, Any]:
        path = f"/api/v2/outbound/contactlists/{contact_list_id}"
        response = self.client.get(f"{self.base_url}{path}", headers=self._headers())
        response.raise_for_status()
        return response.json()

Expected response structure for a campaign:

{
  "id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "name": "Enterprise_Outbound_Campaign",
  "contact_list_id": "cl-98765432-1234-5678-90ab-cdef12345678",
  "outbound_call_type": "preview",
  "dialer_setting": {
    "type": "predictive",
    "predictive_dialer_setting": {
      "max_concurrent_calls": 50
    }
  },
  "phone_number": "+12025550199"
}

Step 2: Validate Payloads Against Voice Constraints and Spoofing Detection

Genesys Cloud enforces strict TN type checking, region code verification, and maximum caller ID length limits. You must validate the ANI payload before submission. The following Pydantic model enforces E.164 formatting, region code alignment, and CNP spoofing detection simulation.

from pydantic import BaseModel, field_validator, ValidationError
import re
from typing import List, Tuple

class ANIValidationSchema(BaseModel):
    phone_number: str
    region_code: str
    tn_type: str
    cnp_registered: bool

    @field_validator("phone_number")
    @classmethod
    def validate_e164_and_length(cls, v: str) -> str:
        pattern = r"^\+[1-9]\d{1,14}$"
        if not re.match(pattern, v):
            raise ValueError("Phone number must be valid E.164 format with 1 to 15 digits after plus sign")
        return v

    @field_validator("tn_type")
    @classmethod
    def validate_tn_type(cls, v: str) -> str:
        allowed = {"FIXED", "MOBILE", "VOIP", "UNKNOWN"}
        if v not in allowed:
            raise ValueError(f"tn_type must be one of {allowed}")
        return v

    @field_validator("region_code")
    @classmethod
    def validate_region_code(cls, v: str) -> str:
        if not re.match(r"^[A-Z]{2}$", v):
            raise ValueError("region_code must be a two-letter ISO 3166-1 alpha-2 code")
        return v

    def check_spoofing_risk(self) -> Tuple[bool, str]:
        if not self.cnp_registered and self.region_code == "US":
            return True, "STIR/SHAKEN violation: Number not registered in CNP registry for US region"
        return False, "Spoofing check passed"

Usage example:

try:
    ani = ANIValidationSchema(
        phone_number="+12025550199",
        region_code="US",
        tn_type="FIXED",
        cnp_registered=True
    )
    risk, msg = ani.check_spoofing_risk()
    print(f"Risk: {risk}, Message: {msg}")
except ValidationError as e:
    print(f"Validation failed: {e}")

Step 3: Construct Atomic PATCH Operations with Rewrite Directives

Genesys Cloud supports atomic PATCH operations for routing parameters. You must structure the payload to update only the ANI/DNIS fields while preserving existing campaign configuration. The rewrite directive is applied via the phone_number field on the campaign endpoint and the phone_number field on the contact list endpoint.

import json
from typing import Dict, Any

class ANIPayloadBuilder:
    @staticmethod
    def build_campaign_patch(ani: ANIValidationSchema) -> Dict[str, Any]:
        return {
            "phone_number": ani.phone_number,
            "outbound_call_type": "preview",
            "dialer_setting": {
                "type": "predictive",
                "predictive_dialer_setting": {
                    "max_concurrent_calls": 50
                }
            }
        }

    @staticmethod
    def build_contact_list_patch(ani: ANIValidationSchema) -> Dict[str, Any]:
        return {
            "name": "ANI_Updated_Contact_List",
            "contact_columns": [
                {"name": "phone_number", "type": "string"},
                {"name": "first_name", "type": "string"},
                {"name": "last_name", "type": "string"}
            ]
        }

Step 4: Execute Updates with Retry Logic and Latency Tracking

The Genesys Cloud API enforces rate limits. You must implement exponential backoff for 429 responses. The following method tracks latency, applies retry logic, and returns structured execution metrics.

import time
from typing import Dict, Any, Optional

class ANIRoutingExecutor:
    def __init__(self, client: ANIRoutingClient):
        self.client = client
        self.max_retries = 3
        self.base_delay = 1.0

    def _retry_request(self, method: str, url: str, json_payload: Dict[str, Any]) -> Dict[str, Any]:
        last_exception: Optional[Exception] = None
        start_time = time.perf_counter()

        for attempt in range(self.max_retries):
            try:
                response = self.client.client.request(
                    method=method,
                    url=url,
                    headers=self.client._headers(),
                    json=json_payload
                )
                
                if response.status_code == 429:
                    retry_after = float(response.headers.get("Retry-After", self.base_delay * (2 ** attempt)))
                    time.sleep(retry_after)
                    continue
                
                response.raise_for_status()
                latency_ms = (time.perf_counter() - start_time) * 1000
                return {
                    "success": True,
                    "status_code": response.status_code,
                    "latency_ms": round(latency_ms, 2),
                    "data": response.json()
                }
                
            except httpx.HTTPStatusError as e:
                last_exception = e
                if e.response.status_code in (400, 401, 403, 409):
                    return {
                        "success": False,
                        "status_code": e.response.status_code,
                        "latency_ms": round((time.perf_counter() - start_time) * 1000, 2),
                        "error": e.response.json()
                    }
                time.sleep(self.base_delay * (2 ** attempt))

        return {
            "success": False,
            "status_code": last_exception.response.status_code if last_exception else 0,
            "latency_ms": round((time.perf_counter() - start_time) * 1000, 2),
            "error": str(last_exception)
        }

    def update_campaign_ani(self, campaign_id: str, payload: Dict[str, Any]) -> Dict[str, Any]:
        url = f"{self.client.base_url}/api/v2/outbound/campaigns/{campaign_id}"
        return self._retry_request("PATCH", url, payload)

    def update_contact_list_ani(self, contact_list_id: str, payload: Dict[str, Any]) -> Dict[str, Any]:
        url = f"{self.client.base_url}/api/v2/outbound/contactlists/{contact_list_id}"
        return self._retry_request("PATCH", url, payload)

Step 5: Synchronize Events with External CNPS Providers and Generate Audit Logs

You must log every ANI manipulation for voice governance. The following class generates structured audit records and simulates webhook synchronization with external CNPS providers.

import json
import logging
from datetime import datetime, timezone
from typing import Dict, Any, List

class ANIAuditManager:
    def __init__(self, webhook_url: str, logger: Optional[logging.Logger] = None):
        self.webhook_url = webhook_url
        self.logger = logger or logging.getLogger("ANI_Audit")
        self.logger.setLevel(logging.INFO)
        handler = logging.StreamHandler()
        handler.setFormatter(logging.Formatter("%(asctime)s - %(levelname)s - %(message)s"))
        self.logger.addHandler(handler)

    def log_mutation(self, execution_result: Dict[str, Any], resource_type: str, resource_id: str) -> Dict[str, Any]:
        audit_record = {
            "timestamp": datetime.now(timezone.utc).isoformat(),
            "resource_type": resource_type,
            "resource_id": resource_id,
            "success": execution_result["success"],
            "latency_ms": execution_result["latency_ms"],
            "status_code": execution_result["status_code"],
            "payload_hash": self._hash_payload(execution_result.get("data", {}))
        }
        
        self.logger.info(f"Audit: {json.dumps(audit_record)}")
        
        if execution_result["success"]:
            self._sync_cnps_webhook(audit_record)
            
        return audit_record

    def _hash_payload(self, data: Dict[str, Any]) -> str:
        import hashlib
        normalized = json.dumps(data, sort_keys=True)
        return hashlib.sha256(normalized.encode()).hexdigest()

    def _sync_cnps_webhook(self, audit_record: Dict[str, Any]) -> None:
        try:
            response = httpx.post(
                self.webhook_url,
                json={"event": "ani_rewrite_complete", "audit": audit_record},
                timeout=10.0
            )
            response.raise_for_status()
            self.logger.info(f"CNPS Webhook sync successful: {response.status_code}")
        except httpx.HTTPError as e:
            self.logger.warning(f"CNPS Webhook sync failed: {e}")

Complete Working Example

import httpx
import time
from typing import Optional, Dict, Any
from pydantic import BaseModel, field_validator, ValidationError
import re
import json
import logging
from datetime import datetime, timezone
import hashlib

class GenesysAuthManager:
    def __init__(self, base_url: str, client_id: str, client_secret: str):
        self.base_url = base_url.rstrip("/")
        self.client_id = client_id
        self.client_secret = client_secret
        self._token: Optional[str] = None
        self._expires_at: float = 0.0

    def get_token(self) -> str:
        if self._token and time.time() < self._expires_at - 300:
            return self._token
        
        url = f"{self.base_url}/oauth/token"
        headers = {"Content-Type": "application/x-www-form-urlencoded"}
        data = {
            "grant_type": "client_credentials",
            "client_id": self.client_id,
            "client_secret": self.client_secret
        }

        response = httpx.post(url, headers=headers, data=data)
        response.raise_for_status()
        payload = response.json()
        
        self._token = payload["access_token"]
        self._expires_at = time.time() + payload["expires_in"] - 300
        return self._token

class ANIValidationSchema(BaseModel):
    phone_number: str
    region_code: str
    tn_type: str
    cnp_registered: bool

    @field_validator("phone_number")
    @classmethod
    def validate_e164_and_length(cls, v: str) -> str:
        pattern = r"^\+[1-9]\d{1,14}$"
        if not re.match(pattern, v):
            raise ValueError("Phone number must be valid E.164 format with 1 to 15 digits after plus sign")
        return v

    @field_validator("tn_type")
    @classmethod
    def validate_tn_type(cls, v: str) -> str:
        allowed = {"FIXED", "MOBILE", "VOIP", "UNKNOWN"}
        if v not in allowed:
            raise ValueError(f"tn_type must be one of {allowed}")
        return v

    @field_validator("region_code")
    @classmethod
    def validate_region_code(cls, v: str) -> str:
        if not re.match(r"^[A-Z]{2}$", v):
            raise ValueError("region_code must be a two-letter ISO 3166-1 alpha-2 code")
        return v

    def check_spoofing_risk(self) -> tuple:
        if not self.cnp_registered and self.region_code == "US":
            return True, "STIR/SHAKEN violation: Number not registered in CNP registry for US region"
        return False, "Spoofing check passed"

class ANIRoutingClient:
    def __init__(self, base_url: str, auth_manager: GenesysAuthManager):
        self.base_url = base_url.rstrip("/")
        self.auth = auth_manager
        self.client = httpx.Client(timeout=30.0)

    def _headers(self) -> Dict[str, str]:
        return {
            "Authorization": f"Bearer {self.auth.get_token()}",
            "Content-Type": "application/json"
        }

class ANIRoutingExecutor:
    def __init__(self, client: ANIRoutingClient):
        self.client = client
        self.max_retries = 3
        self.base_delay = 1.0

    def _retry_request(self, method: str, url: str, json_payload: Dict[str, Any]) -> Dict[str, Any]:
        last_exception: Optional[Exception] = None
        start_time = time.perf_counter()

        for attempt in range(self.max_retries):
            try:
                response = self.client.client.request(
                    method=method,
                    url=url,
                    headers=self.client._headers(),
                    json=json_payload
                )
                
                if response.status_code == 429:
                    retry_after = float(response.headers.get("Retry-After", self.base_delay * (2 ** attempt)))
                    time.sleep(retry_after)
                    continue
                
                response.raise_for_status()
                latency_ms = (time.perf_counter() - start_time) * 1000
                return {
                    "success": True,
                    "status_code": response.status_code,
                    "latency_ms": round(latency_ms, 2),
                    "data": response.json()
                }
                
            except httpx.HTTPStatusError as e:
                last_exception = e
                if e.response.status_code in (400, 401, 403, 409):
                    return {
                        "success": False,
                        "status_code": e.response.status_code,
                        "latency_ms": round((time.perf_counter() - start_time) * 1000, 2),
                        "error": e.response.json()
                    }
                time.sleep(self.base_delay * (2 ** attempt))

        return {
            "success": False,
            "status_code": last_exception.response.status_code if last_exception else 0,
            "latency_ms": round((time.perf_counter() - start_time) * 1000, 2),
            "error": str(last_exception)
        }

    def update_campaign_ani(self, campaign_id: str, payload: Dict[str, Any]) -> Dict[str, Any]:
        url = f"{self.client.base_url}/api/v2/outbound/campaigns/{campaign_id}"
        return self._retry_request("PATCH", url, payload)

class ANIAuditManager:
    def __init__(self, webhook_url: str):
        self.webhook_url = webhook_url
        self.logger = logging.getLogger("ANI_Audit")
        self.logger.setLevel(logging.INFO)
        handler = logging.StreamHandler()
        handler.setFormatter(logging.Formatter("%(asctime)s - %(levelname)s - %(message)s"))
        self.logger.addHandler(handler)

    def log_mutation(self, execution_result: Dict[str, Any], resource_type: str, resource_id: str) -> Dict[str, Any]:
        audit_record = {
            "timestamp": datetime.now(timezone.utc).isoformat(),
            "resource_type": resource_type,
            "resource_id": resource_id,
            "success": execution_result["success"],
            "latency_ms": execution_result["latency_ms"],
            "status_code": execution_result["status_code"],
            "payload_hash": self._hash_payload(execution_result.get("data", {}))
        }
        
        self.logger.info(f"Audit: {json.dumps(audit_record)}")
        
        if execution_result["success"]:
            self._sync_cnps_webhook(audit_record)
            
        return audit_record

    def _hash_payload(self, data: Dict[str, Any]) -> str:
        normalized = json.dumps(data, sort_keys=True)
        return hashlib.sha256(normalized.encode()).hexdigest()

    def _sync_cnps_webhook(self, audit_record: Dict[str, Any]) -> None:
        try:
            response = httpx.post(
                self.webhook_url,
                json={"event": "ani_rewrite_complete", "audit": audit_record},
                timeout=10.0
            )
            response.raise_for_status()
            self.logger.info(f"CNPS Webhook sync successful: {response.status_code}")
        except httpx.HTTPError as e:
            self.logger.warning(f"CNPS Webhook sync failed: {e}")

def main():
    base_url = "https://api.mypurecloud.com"
    client_id = "YOUR_CLIENT_ID"
    client_secret = "YOUR_CLIENT_SECRET"
    campaign_id = "a1b2c3d4-e5f6-7890-abcd-ef1234567890"
    webhook_url = "https://your-cnps-provider.example.com/webhooks/ani-sync"

    auth = GenesysAuthManager(base_url, client_id, client_secret)
    client = ANIRoutingClient(base_url, auth)
    executor = ANIRoutingExecutor(client)
    audit = ANIAuditManager(webhook_url)

    try:
        ani = ANIValidationSchema(
            phone_number="+12025550199",
            region_code="US",
            tn_type="FIXED",
            cnp_registered=True
        )
        risk, msg = ani.check_spoofing_risk()
        if risk:
            raise ValueError(msg)

        payload = {
            "phone_number": ani.phone_number,
            "outbound_call_type": "preview",
            "dialer_setting": {
                "type": "predictive",
                "predictive_dialer_setting": {
                    "max_concurrent_calls": 50
                }
            }
        }

        result = executor.update_campaign_ani(campaign_id, payload)
        audit_record = audit.log_mutation(result, "outbound_campaign", campaign_id)
        print(f"Execution complete. Success: {result['success']}, Latency: {result['latency_ms']}ms")

    except ValidationError as e:
        print(f"Validation failed: {e}")
    except httpx.HTTPError as e:
        print(f"HTTP Error: {e}")
    except Exception as e:
        print(f"Unexpected error: {e}")

if __name__ == "__main__":
    main()

Common Errors & Debugging

Error: 400 Bad Request

• Cause: Payload violates Genesys Cloud schema constraints. Common triggers include invalid E.164 formatting, unsupported tn_type values, or exceeding maximum caller ID length limits.
• Fix: Verify the phone_number field matches the ^\+[1-9]\d{1,14}$ pattern. Ensure tn_type uses exact casing from the allowed set. Check the response body for errors array detailing the exact field failure.
• Code showing the fix: The ANIValidationSchema class enforces these constraints before the PATCH request. Review the ValidationError output to identify the exact field.

Error: 401 Unauthorized or 403 Forbidden

• Cause: Expired OAuth token or missing scopes. The Client Credentials token expires after 24 hours. Scopes outbound:campaign:write and outbound:contactlist:write are mandatory for ANI manipulation.
• Fix: Regenerate the token via GenesysAuthManager.get_token(). Verify the OAuth application in Genesys Cloud CX has the required scopes assigned. Check token expiration against expires_in claims.
• Code showing the fix: The get_token method automatically refreshes when time.time() exceeds _expires_at - 300. Add explicit scope verification in the OAuth application console.

Error: 429 Too Many Requests

• Cause: Rate limit cascade triggered by rapid PATCH operations. Genesys Cloud enforces per-tenant and per-endpoint rate limits.
• Fix: Implement exponential backoff. The _retry_request method reads the Retry-After header and applies fallback delays. Reduce concurrent execution threads.
• Code showing the fix: The retry loop checks response.status_code == 429 and sleeps for retry_after seconds before attempting the next request.

Error: 409 Conflict

• Cause: Concurrent modification of the same campaign or contact list. Genesys Cloud uses optimistic concurrency control via ETags.
• Fix: Fetch the current resource state immediately before PATCH. Include the If-Match header with the ETag value from the GET response. Retry the sequence if the conflict persists.
• Code showing the fix: Add headers["If-Match"] = etag to the _headers method when performing updates. Implement a fetch-then-update pattern to guarantee fresh state.

Official References

• Genesys Cloud CX Outbound Campaigns API
• Genesys Cloud CX Contact Lists API
• Genesys Cloud CX OAuth 2.0 Documentation
• STIR/SHAKEN CNP Registry Guidelines
• HTTPX Python Documentation