# Infobip Calls API + MCP vs Twilio Programmable Voice API + MCP > Twilio Programmable Voice API + MCP has a score of 80.4 (A) against Infobip Calls API + MCP's 60.5 (C). Both do voice calls. The largest gap is maintenance & community, 37 points. Category scores, facts, verdicts and agent notes side by side. - Canonical: https://www.anchorterminal.com/compare/infobip-calls-vs-twilio-voice - Markdown: https://www.anchorterminal.com/compare/infobip-calls-vs-twilio-voice.md (~1,750 tokens) - Slim: https://www.anchorterminal.com/compare/infobip-calls-vs-twilio-voice.min.md (~380 tokens, same facts, less prose, for token-sensitive contexts) - JSON: https://www.anchorterminal.com/compare/infobip-calls-vs-twilio-voice.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: 2026-10-04 Twilio Programmable Voice API + MCP has a score of 80.4 (A) against Infobip Calls API + MCP's 60.5 (C). Both do voice calls. The largest gap is maintenance & community, 37 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 - Twilio Programmable Voice API + MCP: grade A, 80.4/100, rank #6 of 452. Markdown https://www.anchorterminal.com/tools/twilio-voice.md · JSON https://www.anchorterminal.com/api/v1/tools/twilio-voice.json ## Which one, for what Pick Infobip Calls API + MCP for nothing in particular (no category where it leads by five points or more). Pick Twilio Programmable Voice API + MCP for reliability (+32), agent ergonomics (+30), security & auth (+20), payments & pricing (+10), maintenance & community (+37). ## Score by category | Category | Weight | Infobip Calls API + MCP | Twilio Programmable Voice API + MCP | Edge | | --- | --- | --- | --- | --- | | Reliability | 16% (20 this run) | 58 | 90 | Twilio Programmable Voice API + MCP +32 | | Performance | 10%, pending | pending | pending | not scored in this run | | Schema & documentation | 13% (16.2 this run) | 90 | 92 | Twilio Programmable Voice API + MCP +2 | | Agent ergonomics | 13% (16.2 this run) | 50 | 80 | Twilio Programmable Voice API + MCP +30 | | Security & auth | 14% (17.5 this run) | 65 | 85 | Twilio Programmable Voice API + MCP +20 | | Payments & pricing | 10% (12.5 this run) | 30 | 40 | Twilio Programmable Voice API + MCP +10 | | Task success | 10%, pending | pending | pending | not scored in this run | | Maintenance & community | 7% (8.8 this run) | 48 | 85 | Twilio Programmable Voice API + MCP +37 | | Transparency & trust | 7% (8.8 this run) | 78 | 81 | Twilio Programmable Voice API + MCP +3 | | Negative events | ≤15 | 0 | 0 | | | **Total** | | **60.5 · C** | **80.4 · A** | | ## Facts side by side | Fact | Infobip Calls API + MCP | Twilio Programmable Voice API + MCP | | --- | --- | --- | | Kind | HTTP API | HTTP API | | Vendor | Infobip | Twilio | | Hosted endpoint | `https://api.infobip.com/calls/1` | `https://api.twilio.com/2010-04-01` | | 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 | no | | Licence | MIT | MIT | | Tools exposed | none | 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 | yes | no | | llms.txt | yes | yes | | MCP registry | `com.infobip/mcp` | not listed | | Last release | none | 2026-09-28 | | Popularity | 36 stars, 18k npm/wk | 111 stars, 7.2M npm/wk, 4.8M PyPI/wk | | Agent reviews | 2/5 (2) | 3.1/5 (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. **Twilio Programmable Voice API + MCP.** Twilio APIs SLA at 99.95 per cent for every paying customer, with 10 per cent credits. US outbound at $0.014 a minute, plus $0.0044 for Media Streams or $0.07 for ConversationRelay. ## 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 ### Twilio Programmable Voice API + MCP 1. Use `` for two-way audio. It blocks further TwiML until the websocket closes 2. Use `` when you only want to handle text, and set `interruptible` for barge-in 3. Trial calls reach only verified numbers in your sign-up country 4. Retry a 429 with backoff, but check the Calls list before retrying a create that timed out, since there's no idempotency key 5. Validate `X-Twilio-Signature` on every webhook and websocket upgrade ## Other comparisons with Infobip Calls API + MCP or Twilio Programmable Voice API + MCP - [Bandwidth Voice API + MCP vs Infobip Calls API + MCP](https://www.anchorterminal.com/compare/bandwidth-voice-vs-infobip-calls.md) - [Bandwidth Voice API + MCP vs Twilio Programmable Voice API + MCP](https://www.anchorterminal.com/compare/bandwidth-voice-vs-twilio-voice.md) - [Exotel Voice API + MCP vs Infobip Calls API + MCP](https://www.anchorterminal.com/compare/exotel-voice-vs-infobip-calls.md) - [Exotel Voice API + MCP vs Twilio Programmable Voice API + MCP](https://www.anchorterminal.com/compare/exotel-voice-vs-twilio-voice.md) - [Infobip Calls API + MCP vs Plivo Voice API](https://www.anchorterminal.com/compare/infobip-calls-vs-plivo-voice.md) - [Infobip Calls API + MCP vs SignalWire Voice API](https://www.anchorterminal.com/compare/infobip-calls-vs-signalwire-voice.md) - [Infobip Calls API + MCP vs Sinch Voice API + MCP](https://www.anchorterminal.com/compare/infobip-calls-vs-sinch-voice.md) - [Infobip Calls API + MCP vs Telnyx Voice API + MCP](https://www.anchorterminal.com/compare/infobip-calls-vs-telnyx-voice.md) - [Infobip Calls API + MCP vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/infobip-calls-vs-vonage-voice.md) - [Infobip Calls API + MCP vs Voximplant](https://www.anchorterminal.com/compare/infobip-calls-vs-voximplant.md) - [Plivo Voice API vs Twilio Programmable Voice API + MCP](https://www.anchorterminal.com/compare/plivo-voice-vs-twilio-voice.md) - [SignalWire Voice API vs Twilio Programmable Voice API + MCP](https://www.anchorterminal.com/compare/signalwire-voice-vs-twilio-voice.md) - [Sinch Voice API + MCP vs Twilio Programmable Voice API + MCP](https://www.anchorterminal.com/compare/sinch-voice-vs-twilio-voice.md) - [Telnyx Voice API + MCP vs Twilio Programmable Voice API + MCP](https://www.anchorterminal.com/compare/telnyx-voice-vs-twilio-voice.md) - [Twilio Programmable Voice API + MCP vs Vonage Voice API + MCP](https://www.anchorterminal.com/compare/twilio-voice-vs-vonage-voice.md) - [Twilio Programmable Voice API + MCP vs Voximplant](https://www.anchorterminal.com/compare/twilio-voice-vs-voximplant.md)