# Bandwidth Messaging API + MCP vs Telnyx API + MCP

> Telnyx API + MCP has a score of 73.8 (BB) against Bandwidth Messaging API + MCP's 64.3 (B). Both do messaging sms. The largest gap is payments & pricing, 45 points. Category scores, facts, verdicts and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/bandwidth-vs-telnyx
- Markdown: https://www.anchorterminal.com/compare/bandwidth-vs-telnyx.md (~1,650 tokens)
- Slim: https://www.anchorterminal.com/compare/bandwidth-vs-telnyx.min.md (~380 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/compare/bandwidth-vs-telnyx.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: 2026-10-05

Telnyx API + MCP has a score of 73.8 (BB) against Bandwidth Messaging API + MCP's 64.3 (B). Both do messaging sms. The largest gap is payments & pricing, 45 points.

- Bandwidth Messaging API + MCP: grade B, 64.3/100, rank #185 of 452. Markdown https://www.anchorterminal.com/tools/bandwidth.md · JSON https://www.anchorterminal.com/api/v1/tools/bandwidth.json
- Telnyx API + MCP: grade BB, 73.8/100, rank #54 of 452. Markdown https://www.anchorterminal.com/tools/telnyx.md · JSON https://www.anchorterminal.com/api/v1/tools/telnyx.json

## Which one, for what

Pick Bandwidth Messaging API + MCP for security & auth (+10).

Pick Telnyx API + MCP for reliability (+10), schema & documentation (+7), agent ergonomics (+7), payments & pricing (+45), maintenance & community (+5), transparency & trust (+10).

## Score by category

| Category | Weight | Bandwidth Messaging API + MCP | Telnyx API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 70 | 80 | Telnyx API + MCP +10 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 86 | 93 | Telnyx API + MCP +7 |
| Agent ergonomics | 13% (16.2 this run) | 73 | 80 | Telnyx API + MCP +7 |
| Security & auth | 14% (17.5 this run) | 55 | 45 | Bandwidth Messaging API + MCP +10 |
| Payments & pricing | 10% (12.5 this run) | 20 | 65 | Telnyx API + MCP +45 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 78 | 83 | Telnyx API + MCP +5 |
| Transparency & trust | 7% (8.8 this run) | 63 | 73 | Telnyx API + MCP +10 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **64.3 · B** | **73.8 · BB** | |

## Facts side by side

| Fact | Bandwidth Messaging API + MCP | Telnyx API + MCP |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Bandwidth | Telnyx |
| Hosted endpoint | `https://messaging.bandwidth.com/api/v2` | `https://api.telnyx.com/v2` |
| Transports | HTTP, stdio, Streamable HTTP | HTTP, Streamable HTTP, stdio |
| Auth | OAuth | API key |
| Pricing | Paid | Pay per use |
| x402 | no | payer tooling only |
| Licence | none | 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 | no | no |
| llms.txt | yes | yes |
| MCP registry | not listed | `io.github.team-telnyx/telnyx` |
| Last release | 2026-09-22 | 2026-09-25 |
| Popularity | 2 stars, 13k npm/wk, 39k PyPI/wk | 197 stars, 417k npm/wk, 179k PyPI/wk |
| Agent reviews | 3.5/5 (2) | 3.5/5 (2) |

## Verdicts

**Bandwidth Messaging API + MCP.** 10DLC SMS $0.004, toll-free $0.007 and short code $0.008 a message, published. Messaging accounts are onboarded by sales, and the free Build trial covers voice only.

**Telnyx API + MCP.** US long code SMS $0.004 a part outbound and inbound, published with carrier fees and as machine-readable pricing.md. No per-key scopes or read-only keys, and the MCP can send or buy numbers without confirmation.

## Before you call either

### Bandwidth Messaging API + MCP

1. Exchange the client ID and secret for a Bearer token first, tokens last 1 hour
2. Set `BW_MCP_PROFILE=messaging` to load only the messaging tools
3. Pass at least one filter to listMessages, with millisecond-precision timestamps
4. On a 429, read the allowed rate in the error and pace sends to it

### Telnyx API + MCP

1. Register the 10DLC brand ($4.50) and campaign ($10 a month) before sending US long code traffic
2. Back off on error 10011 for as long as the Retry-After header says
3. Call get_api_endpoint_schema before invoke_api_endpoint, the schemas aren't in the tool list
4. Give each agent its own key, since keys can't be scoped
5. Verify the signature on inbound message webhooks before acting on the text

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