Trestle MCP by usefulapi MCP Server

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answering

Trestle MCP by usefulapi is answering right now. Last checked 10 min ago. It exposes 2 tools. Last commit 8 Nov 2026.

Validate phone numbers, line types and TCPA litigator risk in Trestle.

Uptime history 11 hours of history

11 hours agonow

100.0%

Uptime 24h

38 of 38 checks

Tools

read from the server

209 ms

Response time

average over 24h

Stars

last commit 8 Nov 2026

Nothing serious here today

Today is the operative word: we check Trestle MCP by usefulapi every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 10 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add trestle --transport http https://trestle.usefulapi.io/mcp

Settings → Connectors → Add custom connector, then paste this address

https://trestle.usefulapi.io/mcp

~/.codex/config.toml

[mcp_servers.trestle]
url = "https://trestle.usefulapi.io/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "trestle": {
      "url": "https://trestle.usefulapi.io/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "trestle": {
      "type": "http",
      "url": "https://trestle.usefulapi.io/mcp"
    }
  }
}

Available tools 2

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

trestle

trestle_check_tcpa_litigator

Validate a US phone number and run Trestle's TCPA litigator check. Returns add_ons.litigator_checks['phone.is_litigator_risk']: true when the subscriber is a known TCPA litigator, null when the check could not finish. US numbers only. The check is a paid add-on and works only when it is enabled on the API key; otherwise add_ons is missing from the reply. Use it to verify leads before you call or text them. Use only for identity or lead verification, or caller routing. Never use the result for credit, insurance, employment, housing or benefits decisions (FCRA), or for marketing. Trestle Phone Validation API: GET /3.0/phone_intel with add_ons=litigator_checks.

trestle_validate_phone

Check a phone number with Trestle Phone Validation. Returns whether it is valid, its country and carrier, its line type (Mobile, Landline, FixedVOIP, NonFixedVOIP, TollFree and so on), whether it is prepaid, and a 0-100 activity score (70 or above: likely connected; 30 or below: likely disconnected or unanswered). Does not return the owner's name. Use only for identity or lead verification, or caller routing. Never use the result for credit, insurance, employment, housing or benefits decisions (FCRA), or for marketing. Trestle Phone Validation API: GET /3.0/phone_intel.

Endpoints

URL	Transport	State	Latency	Checked
https://trestle.usefulapi.io/mcp	streamable-http	answering	494 ms	10 min ago

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Trestle MCP by usefulapi — questions

Answers built from our own checks of this server.

What can Trestle MCP by usefulapi do?

It exposes 2 tools, read directly from the server on our last check. Among them: trestle_check_tcpa_litigator, trestle_validate_phone. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Trestle MCP by usefulapi working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 38 of 38 checks got a reply (100.0%), average response time 209 ms. The bar chart above shows every period we have measured.

How do I connect Trestle MCP by usefulapi?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Trestle MCP by usefulapi need an API key?

No. Trestle MCP by usefulapi completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Trestle MCP by usefulapi?

It answers our handshake in 209 ms on average, which is faster than 65% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Trestle MCP by usefulapi open source?

The code is open source: it is published under the MIT licence, written in JavaScript, 1 stars on GitHub and 1 open issue. The licence covers the code in the repository, not the hosted service at trestle.usefulapi.io, which runs on its operator's own terms.