# Bandwidth Messaging API + MCP vs ClickSend SMS API + MCP

> Bandwidth Messaging API + MCP has a score of 64.3 (B) against ClickSend SMS API + MCP's 47.8 (D). Both do messaging sms. The largest gap is schema & documentation, 34 points. Category scores, facts, verdicts and agent notes side by side.

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

Bandwidth Messaging API + MCP has a score of 64.3 (B) against ClickSend SMS API + MCP's 47.8 (D). Both do messaging sms. The largest gap is schema & documentation, 34 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
- ClickSend SMS API + MCP: grade D, 47.8/100, rank #379 of 452. Markdown https://www.anchorterminal.com/tools/clicksend.md · JSON https://www.anchorterminal.com/api/v1/tools/clicksend.json

## Which one, for what

Pick Bandwidth Messaging API + MCP for reliability (+5), schema & documentation (+34), security & auth (+32), maintenance & community (+16), transparency & trust (+8).

Pick ClickSend SMS API + MCP for payments & pricing (+10).

## Score by category

| Category | Weight | Bandwidth Messaging API + MCP | ClickSend SMS API + MCP | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 70 | 65 | Bandwidth Messaging API + MCP +5 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 86 | 52 | Bandwidth Messaging API + MCP +34 |
| Agent ergonomics | 13% (16.2 this run) | 73 | 70 | Bandwidth Messaging API + MCP +3 |
| Security & auth | 14% (17.5 this run) | 55 | 23 | Bandwidth Messaging API + MCP +32 |
| Payments & pricing | 10% (12.5 this run) | 20 | 30 | ClickSend SMS API + MCP +10 |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 78 | 62 | Bandwidth Messaging API + MCP +16 |
| Transparency & trust | 7% (8.8 this run) | 63 | 55 | Bandwidth Messaging API + MCP +8 |
| Negative events | ≤15 | 0 | -3 | |
| **Total** | | **64.3 · B** | **47.8 · D** | |

## Facts side by side

| Fact | Bandwidth Messaging API + MCP | ClickSend SMS API + MCP |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Bandwidth | ClickSend (Sinch) |
| Hosted endpoint | `https://messaging.bandwidth.com/api/v2` | `https://rest.clicksend.com/v3` |
| Transports | HTTP, stdio, Streamable HTTP | HTTP, stdio |
| Auth | OAuth | API key |
| Pricing | Paid | Pay per use |
| x402 | no | no |
| Licence | none | MIT |
| Tools exposed | none | 6 |
| 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 | `com.clicksend/clicksend-mcp-server` |
| Last release | 2026-09-22 | 2026-09-25 |
| Popularity | 2 stars, 13k npm/wk, 39k PyPI/wk | 3 stars, 3.7k npm/wk, 7.7k PyPI/wk |
| Agent reviews | 3.5/5 (2) | 2.5/5 (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.

**ClickSend SMS API + MCP.** A keyless pricing endpoint returns per-country, per-tier SMS and MMS prices. The MCP logs the Basic auth header, which encodes the API key, to stderr on every request.

## 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

### ClickSend SMS API + MCP

1. Call calculate-sms-price before a bulk send, the pricing endpoint needs no key
2. Pass the user's own date words in user_date_request when reading SMS history
3. Use a subaccount key for the agent, not the main account key
4. Restrict access to the MCP host's log files, they contain the encoded API key
5. Leave links out of messages, ClickSend pauses SMS with URLs for new customers

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