MCP HeartbeatTHE MCP OBSERVATORY
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Evidence for your next connection.

Independent measurements of remote MCP servers. Every observation has a timestamp.

Read-only probes

DiscoveryServer directory

Remote MCP servers

Find a server for your workflow, with connection evidence you can inspect.

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41761 servers

Ordered by checks passed
Dated server measurements. The status describes the last probe or a listed authentication requirement. Checks that have not been measured are not failures. Open a server to inspect the evidence.
Server / capabilityLast probeMedian latencyChecks passedLast checked
io.github.webberdesign/webbersites-x402-data-api

45 pay-per-call AI agent tools: scraping, SEO, crypto data, lint, agent memory. x402 USDC on Base.

Finance & CryptoPayments & trading

Responded422 ms15 / 22
Aircall MCP by usefulapi

Read calls, contacts, users, teams and numbers; tag calls and create or update contacts.

Developer ToolsCode & DevOps

Responded423 ms15 / 22
Trooth

Read any company's record on the Trooth Network, each fact labeled with who said it and when.

Developer ToolsCode & DevOps

Responded425 ms15 / 22
skillcheck

Check an agent skill before you install it: which of your skills will it clash with?

Developer ToolsCode & DevOps

Responded427 ms15 / 22
Oceanir

Locate photos from visual clues and assess location claims with candidates and uncertainty.

MediaCode & DevOps

Responded429 ms15 / 22
io.github.Nutlope/inspo

Real production websites for coding agents: palettes, fonts, fold autopsies and reference JSX.

Developer ToolsCode & DevOps

Responded429 ms15 / 22
io.github.Kromatic-Innovation/fermi

Calibrated probability ranges for forecasting questions, with the assumptions behind them.

Developer ToolsCode & DevOps

Responded429 ms15 / 22
Praetorium

Public Warhammer 40K rules, datasheets, points and missions; sign in to manage rosters and battles.

Developer ToolsCode & DevOps

Responded430 ms15 / 22
Patent by Ouroboros Apps

USPTO patent search and prior art lookup. Not legal advice

LegalData access / search

Responded430 ms15 / 22
Hands for Agents

Human-operated physical world in the EU: make, assemble, measure, verify, ship.

Developer ToolsCode & DevOps

Responded431 ms15 / 22
Online Poll Maker

Create poll drafts on onlinepollmaker.com. Free, no sign-up; you review and publish in the browser.

Developer ToolsCode & DevOps

Responded432 ms15 / 22
JW3 MCP Server

JW3.ai remote MCP server for market reads and confirm-gated trading execution.

Developer ToolsCode & DevOps

Responded432 ms15 / 22
io.github.agentwares/mcp-liveness

Does an MCP server work for a stock client? By registry name or URL. Tool drift too. Free, no key.

Finance & CryptoCode & DevOps

Responded432 ms15 / 22
Emission Factors

Keyless US grid carbon + power cost by ZIP: eGRID Scope 2, Scope 1 fuels, site ranking, clean hours

Developer ToolsCode & DevOps

Responded433 ms15 / 22
Atom.com — Premium Domains

Search, appraise, trademark-check, and buy premium brandable domain names from Atom.com.

LegalData access / search

Responded433 ms15 / 22
com.leadmarmot/leads

Companies that just raised or launched, what they need most, the opener and contacts, for agencies.

Marketing & SalesData access / search

Responded433 ms15 / 22
LingYi Tools

Search 162 AI tools in the LingYi Tools directory by keyword, category, pricing, or featured picks.

Developer ToolsCode & DevOps

Responded434 ms15 / 22
Movie Scene Map

Where films and TV were shot, and where games, anime and manga are set. Wikidata, read only, CC0.

MediaAI / LLM tooling

Responded435 ms15 / 22
io.github.timescale/pg-aiguide

Comprehensive PostgreSQL documentation and best practices, including ecosystem tools

Developer ToolsDatabase

Responded435 ms15 / 22
LendMail

Decode credit and loan offers you got in the mail: upload a photo on LendMail, get the analysis.

MediaCode & DevOps

Responded435 ms15 / 22
The Agent Forge

See which AI models fall for traps in real jobs, and check MCP servers or skills before install.

Developer ToolsCode & DevOps

Responded435 ms15 / 22
PuraSIM travel eSIM

Search and compare PuraSIM travel eSIM data plans for 187 countries and get a link to buy them.

TravelCode & DevOps

Responded436 ms15 / 22
VibeRaven

Check Supabase migrations for RLS and grant gaps; fixes for Supabase, Vercel, Stripe errors.

Finance & CryptoPayments & trading

Responded436 ms15 / 22
KlearFlow Relay

Machine-paid revenue intelligence, recovery decisions, and x402 routing for AI agents.

Developer ToolsCode & DevOps

Responded436 ms15 / 22

Automated measurements. Not a rating. Unmeasured checks are not failures. How to read the evidence