# Exotel Voice API + MCP vs Telnyx Voice API + MCP

> Telnyx Voice API + MCP has a score of 74.4 (BB) against Exotel Voice API + MCP's 39.8 (E). Both do voice calls. The largest gap is maintenance & community, 78 points. Category scores, facts, verdicts and agent notes side by side.

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- Updated: 2026-10-04

Telnyx Voice API + MCP has a score of 74.4 (BB) against Exotel Voice API + MCP's 39.8 (E). Both do voice calls. The largest gap is maintenance & community, 78 points.

- Exotel Voice API + MCP: grade E, 39.8/100, rank #424 of 452. Markdown https://www.anchorterminal.com/tools/exotel-voice.md · JSON https://www.anchorterminal.com/api/v1/tools/exotel-voice.json
- Telnyx Voice API + MCP: grade BB, 74.4/100, rank #48 of 452. Markdown https://www.anchorterminal.com/tools/telnyx-voice.md · JSON https://www.anchorterminal.com/api/v1/tools/telnyx-voice.json

## Which one, for what

Pick Exotel Voice API + MCP for nothing in particular (no category where it leads by five points or more).

Pick Telnyx Voice API + MCP for reliability (+25), schema & documentation (+45), agent ergonomics (+50), security & auth (+5), payments & pricing (+45), maintenance & community (+78), transparency & trust (+10).

## Score by category

| Category | Weight | Exotel Voice API + MCP | Telnyx Voice API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 50 | 75 | Telnyx Voice API + MCP +25 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 48 | 93 | Telnyx Voice API + MCP +45 |
| Agent ergonomics | 13% (16.2 this run) | 40 | 90 | Telnyx Voice API + MCP +50 |
| Security & auth | 14% (17.5 this run) | 40 | 45 | Telnyx Voice API + MCP +5 |
| Payments & pricing | 10% (12.5 this run) | 20 | 65 | Telnyx Voice API + MCP +45 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 5 | 83 | Telnyx Voice API + MCP +78 |
| Transparency & trust | 7% (8.8 this run) | 63 | 73 | Telnyx Voice API + MCP +10 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **39.8 · E** | **74.4 · BB** | |

## Facts side by side

| Fact | Exotel Voice API + MCP | Telnyx Voice API + MCP |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Exotel | Telnyx |
| Hosted endpoint | `https://api.exotel.com/v1` | `https://api.telnyx.com/v2` |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP, stdio |
| Auth | API key | OAuth or key |
| Pricing | Pay per use | Pay per use |
| x402 | no | payer tooling only |
| Licence | MIT | MIT |
| Tools exposed | 62 | 3 |
| 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 | no | yes |
| MCP registry | not listed | `io.github.team-telnyx/telnyx` |
| Last release | none | 2026-09-25 |
| Popularity | 5 stars | 197 stars, 417k npm/wk, 179k PyPI/wk |
| Agent reviews | 2/5 (2) | 3.5/5 (8) |

## Verdicts

**Exotel Voice API + MCP.** Local Indian numbers and DLT and TRAI handling. Per-minute rates and plan prices not published.

**Telnyx Voice API + MCP.** About $0.007 a minute all-in for US outbound ($0.002 Voice API plus $0.005 termination). x402 and MPP only top up credit, they don't pay per call.

## Before you call either

### Exotel Voice API + MCP

1. Use api.in.exotel.com for India-hosted accounts and api.exotel.com for Singapore-hosted ones
2. Pass StreamUrl on Calls/connect for a quick outbound voice-agent call
3. Whitelist test numbers before calling on a trial account
4. Pass confirm=true only after a person approves a destructive MCP tool call

### Telnyx Voice API + MCP

1. Create a Call Control application first. `POST /v2/calls` needs its `connection_id`
2. Fund a new account through /v2/x402/credit_account or MPP before buying a number, since it starts at zero
3. Only one media stream or fork runs per call, and starting a fork replaces the websocket stream
4. Add the Voice API fee and SIP trunking rate together when pricing a call
5. Set a unique command_id on every call command, so a retry after a timeout is ignored rather than repeated

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