# SMS API — Connector coverage

Operation support varies by connector. Downstream unsupported operations are listed separately; an empty or unavailable result is not evidence of support.

## Messages

- **messagebird**: supported: all, add, one; downstream unsupported: none listed
- **plivo**: supported: all, add, one; downstream unsupported: none listed
- **telnyx**: supported: add, one; downstream unsupported: none listed
- **twilio**: supported: all, add, one, delete; downstream unsupported: none listed
- **vonage**: supported: add; downstream unsupported: none listed