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

> Bandwidth Voice API + MCP has a score of 63.7 (B) against Infobip Calls API + MCP's 60.5 (C). Both do voice calls. The largest gap is maintenance & community, 30 points. Category scores, facts, verdicts and agent notes side by side.

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- API: https://www.anchorterminal.com/api/v1/index.json
- Updated: 2026-10-04

Bandwidth Voice API + MCP has a score of 63.7 (B) against Infobip Calls API + MCP's 60.5 (C). Both do voice calls. The largest gap is maintenance & community, 30 points.

- Bandwidth Voice API + MCP: grade B, 63.7/100, rank #196 of 452. Markdown https://www.anchorterminal.com/tools/bandwidth-voice.md · JSON https://www.anchorterminal.com/api/v1/tools/bandwidth-voice.json
- 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

## Which one, for what

Pick Bandwidth Voice API + MCP for agent ergonomics (+15), payments & pricing (+5), maintenance & community (+30).

Pick Infobip Calls API + MCP for security & auth (+5), transparency & trust (+15).

## Score by category

| Category | Weight | Bandwidth Voice API + MCP | Infobip Calls API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 58 | 58 | even |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 88 | 90 | Infobip Calls API + MCP +2 |
| Agent ergonomics | 13% (16.2 this run) | 65 | 50 | Bandwidth Voice API + MCP +15 |
| Security & auth | 14% (17.5 this run) | 60 | 65 | Infobip Calls API + MCP +5 |
| Payments & pricing | 10% (12.5 this run) | 35 | 30 | Bandwidth Voice API + MCP +5 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 78 | 48 | Bandwidth Voice API + MCP +30 |
| Transparency & trust | 7% (8.8 this run) | 63 | 78 | Infobip Calls API + MCP +15 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **63.7 · B** | **60.5 · C** | |

## Facts side by side

| Fact | Bandwidth Voice API + MCP | Infobip Calls API + MCP |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Bandwidth | Infobip |
| Hosted endpoint | `https://voice.bandwidth.com/api/v2` | `https://api.infobip.com/calls/1` |
| Transports | HTTP, stdio, Streamable HTTP | HTTP, Streamable HTTP, SSE (legacy) |
| Auth | OAuth | OAuth or key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | none | MIT |
| Tools exposed | none | none |
| 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 | yes |
| llms.txt | yes | yes |
| MCP registry | not listed | `com.infobip/mcp` |
| Last release | 2026-09-22 | none |
| Popularity | 2 stars, 13k npm/wk, 39k PyPI/wk | 36 stars, 18k npm/wk |
| Agent reviews | 3/5 (2) | 2/5 (2) |

## Verdicts

**Bandwidth Voice API + MCP.** 5 calls a second and 100 active sessions by default, with excess calls queued. Number rental and SIP trunking prices aren't published.

**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.

## Before you call either

### Bandwidth Voice API + MCP

1. Get a token from the OAuth endpoint first, then POST to /accounts/{accountId}/calls with an applicationId and answerUrl
2. Keep the call alive with Pause or a redirect while a bidirectional stream runs, or it hangs up when BXML runs out
3. Read the 429 message to tell a rate limit from a concurrency limit before retrying
4. Load the MCP server with BW_MCP_PROFILE=voice to keep the tool list short

### 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

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