Token expiry mismatch in CI pipeline OAuth client credentials flow

NICE CXone API & Integrations
1

I’m completely stumped as to why the access token generated via POST /oauth/token expires in 3600 seconds despite the scope request including long_lived_token.

The curl command used in the Jenkins pipeline is:

curl -X POST https://api.mypurecloud.com/oauth/token \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "grant_type=client_credentials&scope=long_lived_token"

The response JSON shows "expires_in": 3600. Is the generator incorrectly mapping the scope parameter to the auth model, or is this a platform-side limitation for client credentials grants?

2

If I remember correctly… docs state “the client_credentials grant type does not support the long_lived_token scope.” you are using the wrong grant. switch to authorization_code with refresh_token. set scope=long_lived_token there. the token will last longer. do not ignore this rule.

3

It depends, but generally you’re fighting a losing battle with client_credentials and long-lived tokens in CI. That grant type is strictly for machine-to-machine auth with short expiration. You don’t get a refresh token, so you’re stuck refreshing every hour or dealing with 401s mid-pipeline.

Check NICE CXone OAuth Scopes Reference.

The real issue isn’t just the grant type. It’s that CI pipelines shouldn’t hold tokens across long-running jobs anyway. If you need persistence, use authorization_code with refresh_token for human-in-the-loop deployments, or better yet, use the Private Key JWT flow. It’s cleaner for servers. You sign a JWT with your client secret, send it to /oauth/token, and get a fresh access token on demand. No state management, no refresh token storage.

Here’s how you structure the JWT payload for the client_assertion:

{
 "iss": "your_client_id",
 "sub": "your_client_id",
 "aud": "https://api.mypurecloud.com/oauth/token",
 "jti": "unique_random_string",
 "iat": 1672531200,
 "exp": 1672531260
}

Sign it with HS256 using your client secret. Then POST to /oauth/token with:

curl -X POST https://api.mypurecloud.com/oauth/token \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "grant_type=client_credentials&client_assertion_type=urn:ietf:params:oauth:client-assertion-type:jwt-bearer&client_assertion=<your_signed_jwt>"

This gives you a standard 1-hour token, but you generate it fresh whenever your pipeline starts. It’s atomic. No drift. No expiry mismatches. If you try to force long_lived_token into client_credentials, the platform just ignores it and gives you the default. Don’t waste time fighting the spec. Switch to JWT assertion flow. It’s what the API actually expects for automated systems.

4

have you tried caching the token in redis with a ttl slightly less than 3600s? client_credentials won’t give you long_lived. you’ll get 401s if you don’t refresh. set up a background job to fetch new tokens before expiry.

import redis
r = redis.Redis()
r.setex('gc_token', 3500, access_token)

stops the pipeline from breaking.