Need some help troubleshooting persistent 403 Forbidden errors during SIP trunk registration via the Platform API. Our AppFoundry integration attempts to push custom TLS certificates for multi-org deployments, but the Genesys Cloud Edge rejects the handshake.
- Verified certificate chain validity and ensured intermediate CAs are included in the payload.
- Confirmed the service account has the
sip_trunk:manage scope and correct organizational permissions.
The error occurs specifically during the PUT /api/v2/telephony/providers/edge/siptrunks request.
Have you tried isolating the certificate validation from the load generation logic? Since I’m focused on API throughput and JMeter configs, my usual approach is to separate the TLS handshake test from the actual SIP registration payload.
- Run a simple
openssl s_client -connect <edge-host>:443 -showcerts from the same machine running your JMeter instance. This confirms the network path and certificate chain are valid before hitting the API.
- Check if your JMeter HTTP Request sampler is configured to follow redirects. Genesys Cloud often redirects to a specific edge node, and if the client doesn’t handle this, the TLS context can break.
- Verify the
Content-Type header in your Platform API POST request. It must be application/json. If you’re sending the certificate as raw PEM in the body without proper JSON wrapping, the edge might reject it before even checking scopes.
- Ensure the certificate CN or SAN matches the SIP trunk’s configured hostname exactly. Mismatches here often result in 403s that look like permission errors but are actually TLS failures.