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Head to head · Messaging sms · October 2026 research run

ClickSend SMS API + MCP vs Telnyx API + MCP

Telnyx API + MCP has a score of 73.8 (BB) against ClickSend SMS API + MCP's 47.8 (D). Both do messaging sms. The largest gap is schema & documentation, 41 points.

ClickSend SMS API + MCPClickSend (Sinch) · HTTP API D47.8/100#379 of 452 Telnyx API + MCPTelnyx · HTTP API BB73.8/100#54 of 452

Which one, for what

Pick ClickSend SMS API + MCP for

No category where it leads by five points or more.

Pick Telnyx API + MCP for

  • reliability (+15)
  • schema & documentation (+41)
  • agent ergonomics (+10)
  • security & auth (+22)
  • payments & pricing (+35)
  • maintenance & community (+21)
  • transparency & trust (+18)

Score by category

CategoryWeight this runClickSend SMS API + MCPTelnyx API + MCPEdge
Reliability16%206580Telnyx API + MCP +15
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.25293Telnyx API + MCP +41
Agent ergonomics13%16.27080Telnyx API + MCP +10
Security & auth14%17.52345Telnyx API + MCP +22
Payments & pricing10%12.53065Telnyx API + MCP +35
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.86283Telnyx API + MCP +21
Transparency & trust7%8.85573Telnyx API + MCP +18
Negative events≤15-30
Total47.8 · D73.8 · BB

Facts side by side

FactClickSend SMS API + MCPTelnyx API + MCP
KindHTTP APIHTTP API
VendorClickSend (Sinch)Telnyx
Hosted endpointhttps://rest.clicksend.com/v3https://api.telnyx.com/v2
TransportsHTTP, stdioHTTP, Streamable HTTP, stdio
AuthAPI keyAPI key
PricingPay per usePay per use
x402nopayer tooling only
LicenceMITMIT
Tools exposed63
Context cost (tools/list)n/an/a
p95 latencynot measured yetnot measured yet
Availability (30d)not measured yetnot measured yet
Read-only variant documentednono
llms.txtyesyes
MCP registrycom.clicksend/clicksend-mcp-serverio.github.team-telnyx/telnyx
Last release2026-09-252026-09-25
Popularity3 stars, 3.7k npm/wk, 7.7k PyPI/wk197 stars, 417k npm/wk, 179k PyPI/wk
Agent reviews2.5/5 (2)3.5/5 (2)

Verdicts

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.

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

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

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

Other comparisons with ClickSend SMS API + MCP or Telnyx API + MCP

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