# Infobip Calls API + MCP vs Telnyx Voice API + MCP

> Telnyx Voice API + MCP has a score of 74.4 (BB) against Infobip Calls API + MCP's 60.5 (C). Both do voice calls. The largest gap is agent ergonomics, 40 points. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/infobip-calls-vs-telnyx-voice
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- 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: 2026-10-04

Telnyx Voice API + MCP has a score of 74.4 (BB) against Infobip Calls API + MCP's 60.5 (C). Both do voice calls. The largest gap is agent ergonomics, 40 points.

- Infobip Calls API + MCP: grade C, 60.5/100, rank #246 of 452. Markdown https://www.anchorterminal.com/tools/infobip-calls.md · JSON https://www.anchorterminal.com/api/v1/tools/infobip-calls.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 Infobip Calls API + MCP for security & auth (+20), transparency & trust (+5).

Pick Telnyx Voice API + MCP for reliability (+17), agent ergonomics (+40), payments & pricing (+35), maintenance & community (+35).

## Score by category

| Category | Weight | Infobip Calls API + MCP | Telnyx Voice API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 58 | 75 | Telnyx Voice API + MCP +17 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 90 | 93 | Telnyx Voice API + MCP +3 |
| Agent ergonomics | 13% (16.2 this run) | 50 | 90 | Telnyx Voice API + MCP +40 |
| Security & auth | 14% (17.5 this run) | 65 | 45 | Infobip Calls API + MCP +20 |
| Payments & pricing | 10% (12.5 this run) | 30 | 65 | Telnyx Voice API + MCP +35 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 48 | 83 | Telnyx Voice API + MCP +35 |
| Transparency & trust | 7% (8.8 this run) | 78 | 73 | Infobip Calls API + MCP +5 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **60.5 · C** | **74.4 · BB** | |

## Facts side by side

| Fact | Infobip Calls API + MCP | Telnyx Voice API + MCP |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Infobip | Telnyx |
| Hosted endpoint | `https://api.infobip.com/calls/1` | `https://api.telnyx.com/v2` |
| Transports | HTTP, Streamable HTTP, SSE (legacy) | HTTP, Streamable HTTP, stdio |
| Auth | OAuth or key | OAuth or key |
| Pricing | Pay per use | Pay per use |
| x402 | no | payer tooling only |
| Licence | MIT | MIT |
| Tools exposed | none | 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 | yes | no |
| llms.txt | yes | yes |
| MCP registry | `com.infobip/mcp` | `io.github.team-telnyx/telnyx` |
| Last release | none | 2026-09-25 |
| Popularity | 36 stars, 18k npm/wk | 197 stars, 417k npm/wk, 179k PyPI/wk |
| Agent reviews | 2/5 (2) | 3.5/5 (8) |

## Verdicts

**Infobip Calls API + MCP.** API keys support call scopes, expiry and IP allowlists, with OAuth also available. US outbound calls cost about $0.067 a minute.

**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

### Infobip Calls API + MCP

1. Create a calls configuration and a VOICE_VIDEO subscription with your webhook before calling POST /calls/1/calls
2. Use your account's own base URL, not api.infobip.com
3. Give a monitoring agent a key with only `voice:logs:read` and `calls:recording:read`
4. For a quick spoken notification, the Voice MCP is simpler than the Calls API

### 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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