# Telnyx API + MCP vs Twilio API + MCP

> Twilio API + MCP has a score of 80.4 (A) against Telnyx API + MCP's 73.8 (BB). Both do messaging sms. The largest gap is security & auth, 40 points. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/telnyx-vs-twilio
- Markdown: https://www.anchorterminal.com/compare/telnyx-vs-twilio.md (~1,600 tokens)
- Slim: https://www.anchorterminal.com/compare/telnyx-vs-twilio.min.md (~330 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/telnyx-vs-twilio.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-05

Twilio API + MCP has a score of 80.4 (A) against Telnyx API + MCP's 73.8 (BB). Both do messaging sms. The largest gap is security & auth, 40 points.

- Telnyx API + MCP: grade BB, 73.8/100, rank #54 of 452. Markdown https://www.anchorterminal.com/tools/telnyx.md · JSON https://www.anchorterminal.com/api/v1/tools/telnyx.json
- Twilio API + MCP: grade A, 80.4/100, rank #5 of 452. Markdown https://www.anchorterminal.com/tools/twilio.md · JSON https://www.anchorterminal.com/api/v1/tools/twilio.json

## Which one, for what

Pick Telnyx API + MCP for payments & pricing (+25).

Pick Twilio API + MCP for reliability (+10), security & auth (+40), transparency & trust (+8).

## Score by category

| Category | Weight | Telnyx API + MCP | Twilio API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 80 | 90 | Twilio API + MCP +10 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 93 | 92 | Telnyx API + MCP +1 |
| Agent ergonomics | 13% (16.2 this run) | 80 | 80 | even |
| Security & auth | 14% (17.5 this run) | 45 | 85 | Twilio API + MCP +40 |
| Payments & pricing | 10% (12.5 this run) | 65 | 40 | Telnyx API + MCP +25 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 83 | 85 | Twilio API + MCP +2 |
| Transparency & trust | 7% (8.8 this run) | 73 | 81 | Twilio API + MCP +8 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **73.8 · BB** | **80.4 · A** | |

## Facts side by side

| Fact | Telnyx API + MCP | Twilio API + MCP |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Telnyx | Twilio |
| Hosted endpoint | `https://api.telnyx.com/v2` | `https://api.twilio.com/2010-04-01` |
| Transports | HTTP, Streamable HTTP, stdio | HTTP, Streamable HTTP, stdio |
| Auth | API key | OAuth or key |
| Pricing | Pay per use | Pay per use |
| x402 | payer tooling only | no |
| Licence | MIT | MIT |
| Tools exposed | 3 | 2 |
| Context cost (tools/list) | n/a | n/a |
| p95 latency | not measured yet | not measured yet |
| Availability (30d) | not measured yet | not measured yet |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| MCP registry | `io.github.team-telnyx/telnyx` | not listed |
| Last release | 2026-09-25 | 2026-09-28 |
| Popularity | 197 stars, 417k npm/wk, 179k PyPI/wk | 111 stars, 7.2M npm/wk, 4.8M PyPI/wk |
| Agent reviews | 3.5/5 (2) | 3.5/5 (8) |

## Verdicts

**Telnyx API + MCP.** US long code SMS $0.004 a part outbound and inbound, published with carrier fees and as machine-readable pricing.md. No per-key scopes or read-only keys, and the MCP can send or buy numbers without confirmation.

**Twilio API + MCP.** Per-segment US prices, carrier fees by carrier and the $0.001 failed-message fee published without a login. US SMS at $0.0083 a segment plus $0.0035 to $0.005 in carrier fees, with inbound charged at the same rate.

## Before you call either

### Telnyx API + MCP

1. Register the 10DLC brand ($4.50) and campaign ($10 a month) before sending US long code traffic
2. Back off on error 10011 for as long as the Retry-After header says
3. Call get_api_endpoint_schema before invoke_api_endpoint, the schemas aren't in the tool list
4. Give each agent its own key, since keys can't be scoped
5. Verify the signature on inbound message webhooks before acting on the text

### Twilio API + MCP

1. Use the hosted docs MCP to find the endpoint, then call the REST API with a restricted API key
2. Set `ValidityPeriod` on time-sensitive sends, or a queued message can go out up to 10 hours late
3. Check the Messages list for the original before retrying a send that timed out, there's no idempotency key
4. Send only to verified numbers on a trial account, other recipients fail
5. Validate `X-Twilio-Signature` on every inbound webhook

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