11770
Moderate
Twilio · Communications API
Received empty response body from callback URL.
Quick Answer
Error code 11770 on your Twilio Communications API means: Received empty response body from callback URL.. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Twilio: Validate webhook endpoint URL, TLS certificate, and expected HTTP method.
2
Verify signature secret and payload parsing logic against provider docs.
3
Ensure endpoint returns success quickly and offloads heavy processing asynchronously.
4
Replay failed events using provider tooling after fixing receiver behavior.
5
Add delivery observability and dead-letter handling for repeated webhook failures.
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
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