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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41764 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
NAIF Gravity

Free MCP/API diagnostics. Micro Tools V2: free preview, $1 JSON check, $2 API shape, $3 normalize.

Developer ToolsCode & DevOps

Responded337 ms15 / 22
Bill.pt MCP by usefulapi

List invoices, contacts, items and stock, and create contacts in Bill.pt.

Finance & CryptoPayments & trading

Responded337 ms15 / 22
Adafruit IO MCP by usefulapi

Read Adafruit IO feeds, data, groups and dashboards; publish a data point or create a feed.

Data & AnalyticsData access / search

Responded337 ms15 / 22
Magneta Contract Risk

Smart-contract risk reports for AI agents on 20 EVM chains, paid per call via x402 ($0.02 USDC).

Finance & CryptoPayments & trading

Responded339 ms15 / 22
getcheapgames

Cheapest legit PC and console game keys across stores in 40 countries, plus deals and free games.

OtherOther

Responded339 ms15 / 22
com.thecrowdspace/crowdspace

Search 900+ crowdfunding and P2P lending platforms, market data and regulation by country.

Finance & CryptoData access / search

Responded341 ms15 / 22
MCP security checks — WARDEN and HISTOR

Scan MCP tool definitions for poisoning, look up server history, count tool-list tokens. Free.

Developer ToolsData access / search

Responded342 ms15 / 22
com.x402-list/x402-list-mcp

Find and vet x402 payment APIs before your agent pays one: uptime, price, on-chain volume.

Finance & CryptoPayments & trading

Responded342 ms15 / 22
NaKus unit price

Slovak unit prices (€/piece, €/kg…) + Cite compare via nakus.sk — buy_url only.

OtherOther

Responded342 ms15 / 22
AP Score Distributions

Official College Board AP score distributions 2026, 2025, 2024: percentiles, pass rates.

Developer ToolsCode & DevOps

Responded342 ms15 / 22
Guitar Practice Routine App — Chord Charts

Look up a guitar chord by name and get a text chord diagram. 12,708 standard-tuning names.

Developer ToolsData access / search

Responded344 ms15 / 22
AgentBIT

x402 router-proxy + 79 keyless pay-per-call tools on Base. Pay once, we run the best tool.

Finance & CryptoPayments & trading

Responded344 ms15 / 22
Scribiz

Transcripts, summaries, chapters and timestamped answers for video links, for AI agents.

MediaAI / LLM tooling

Responded345 ms15 / 22
McpStamp Maintenance Log

Equipment maintenance log: service entries with cost, full history, and what is due or overdue.

Developer ToolsCode & DevOps

Responded345 ms15 / 22
OKSign MCP by usefulapi

Read documents, signatures, contacts and credits; manage contacts and remove documents.

Developer ToolsFile & docs

Responded347 ms15 / 22
bexio MCP by usefulapi

Read bexio contacts, invoices, quotes, bills, projects and journal; log time, draft invoices.

Finance & CryptoPayments & trading

Responded347 ms15 / 22
betterimage.io

Social cards and OG images from designed templates: card from a URL, presets, meta tags, link checks

MediaAI / LLM tooling

Responded348 ms15 / 22
io.github.kody-w/dogg-world-check

Verified, citable world numbers right now, each with a public tick and SHA-256 fingerprint.

Developer ToolsCode & DevOps

Responded348 ms15 / 22
Drug Shortage List MCP

FDA drug shortage list: is a drug in shortage now, by name or NDC, with status and reason.

Developer ToolsCode & DevOps

Responded350 ms15 / 22
TaskLite

tasklite.net: hosted backend, REST API and admin for apps built by AI agents

Developer ToolsCode & DevOps

Responded350 ms15 / 22
resOS MCP by usefulapi

Read bookings, guests and availability; create, update or cancel bookings in resOS.

Developer ToolsCode & DevOps

Responded350 ms15 / 22
MotoGP (Race Results)

Live MotoGP, Moto2 and Moto3 standings, results, calendar, riders, live timing and news.

Developer ToolsCode & DevOps

Responded352 ms15 / 22
DaedalMap Administrative Boundaries (loc_id to polygon)

Inspect loc_id boundaries, retrieve bounded shapes, and compare places and coverage.

OtherOther

Responded355 ms15 / 22
io.github.AutomatonColony/automaton-colony

Screen Base smart contracts and B20 tokens: free on-chain check, paid Flash Audit over x402 (USDC).

Finance & CryptoPayments & trading

Responded357 ms15 / 22

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