We are currently debugging a persistent 403 Forbidden error when attempting to provision SIP trunks via the Platform API (/api/v2/telephony/sip/trunks) within our AppFoundry partner application. Our integration serves multiple Genesys Cloud organizations and relies heavily on multi-tenant OAuth to automate telephony setup for new customers.
The specific issue arises when our backend service attempts to create a new SIP trunk configuration for a tenant that has not yet enabled the Telephony feature set. The API returns a 403 Forbidden response with the error code ‘FEATURE_NOT_AVAILABLE’. We have verified that the OAuth token associated with the request possesses the necessary ‘Telephony:Manage’ and ‘Telephony:Read’ scopes. Furthermore, the target organization’s admin console confirms that the SIP Trunking feature is enabled and licensed.
We are using the Genesys Cloud Java SDK version 175.0.0 for our API calls. The request payload includes standard SIP domain and authentication details. We suspect this might be related to asynchronous feature propagation or a specific permission gap in the multi-tenant OAuth flow that prevents the partner app from accessing newly enabled features immediately.
Has anyone encountered similar issues with SIP trunk provisioning via API in a multi-tenant environment? Are there specific pre-requisites or API calls required to ‘activate’ the telephony context for a tenant before the Platform API accepts trunk creation requests? We are currently stuck in deployment for several clients and any insights into the correct sequencing of API calls would be greatly appreciated.
The 403 Forbidden response during trunk provisioning is rarely a simple permission issue when using multi-tenant OAuth. It usually indicates that the underlying tenant does not have the necessary Telephony licenses active or that the SIP trunk limits have been reached before the API call completes.
Since you are managing this via AppFoundry, ensure your integration is checking the tenant’s capability flags before attempting the POST request to /api/v2/telephony/sip/trunks. I manage 15 BYOC trunks across APAC regions, and we often see this error when a new org is spun up but the telephony feature flag hasn’t propagated through the global configuration cache. This delay can be anywhere from 30 seconds to 5 minutes.
Additionally, verify that the OAuth token used for the API call has the telephony:trunks:write scope. A common oversight in multi-tenant setups is using a token with only telephony:trunks:read scopes, which will return a 403 instead of a 401 because the endpoint exists but the action is denied.
If the licenses and scopes are correct, check the carrier-specific SIP credentials. Some carriers require the P-Asserted-Identity header to match the registered SIP URI exactly. If you are provisioning BYOC trunks, ensure the username and password fields in the API payload match what the carrier expects for registration. A mismatch here can sometimes cause the Genesys Cloud API to reject the configuration outright if it fails internal validation against the carrier’s expected format.
Try adding a small delay in your provisioning script after creating the tenant, then retry the trunk creation. This often resolves the transient 403 errors caused by configuration propagation delays.