# Bandwidth Voice API + MCP vs Exotel Voice API + MCP

> Bandwidth Voice API + MCP has a score of 63.7 (B) against Exotel Voice API + MCP's 39.8 (E). Both do voice calls. The largest gap is maintenance & community, 73 points. Category scores, facts, verdicts and agent notes side by side.

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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

Bandwidth Voice API + MCP has a score of 63.7 (B) against Exotel Voice API + MCP's 39.8 (E). Both do voice calls. The largest gap is maintenance & community, 73 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
- 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

## Which one, for what

Pick Bandwidth Voice API + MCP for reliability (+8), schema & documentation (+40), agent ergonomics (+25), security & auth (+20), payments & pricing (+15), maintenance & community (+73).

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

## Score by category

| Category | Weight | Bandwidth Voice API + MCP | Exotel Voice API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 58 | 50 | Bandwidth Voice API + MCP +8 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 88 | 48 | Bandwidth Voice API + MCP +40 |
| Agent ergonomics | 13% (16.2 this run) | 65 | 40 | Bandwidth Voice API + MCP +25 |
| Security & auth | 14% (17.5 this run) | 60 | 40 | Bandwidth Voice API + MCP +20 |
| Payments & pricing | 10% (12.5 this run) | 35 | 20 | Bandwidth Voice API + MCP +15 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 78 | 5 | Bandwidth Voice API + MCP +73 |
| Transparency & trust | 7% (8.8 this run) | 63 | 63 | even |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **63.7 · B** | **39.8 · E** | |

## Facts side by side

| Fact | Bandwidth Voice API + MCP | Exotel Voice API + MCP |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Bandwidth | Exotel |
| Hosted endpoint | `https://voice.bandwidth.com/api/v2` | `https://api.exotel.com/v1` |
| Transports | HTTP, stdio, Streamable HTTP | HTTP, Streamable HTTP |
| Auth | OAuth | API key |
| Pricing | Pay per use | Pay per use |
| x402 | no | no |
| Licence | none | MIT |
| Tools exposed | none | 62 |
| 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 | no |
| MCP registry | not listed | not listed |
| Last release | 2026-09-22 | none |
| Popularity | 2 stars, 13k npm/wk, 39k PyPI/wk | 5 stars |
| 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.

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

## 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

### 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

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