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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40680 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
Spala Public MCP

Discovery, OAuth, project operations, and exact project MCP handoff for Spala backend projects.

Developer ToolsCode & DevOps

Outdated check320 ms15 / 22
Pressa - LaTeX to PDF

Compile LaTeX to PDF without installing TeX Live. No API key needed to start.

Developer ToolsCode & DevOps

Responded324 ms15 / 22
Domain availability and quotes (demo)

Is a .com/.net/.org name free, and a signed one-year quote. Demo seller, orders refused. Free.

OtherOther

Outdated check324 ms15 / 22
Live weather and air quality (GAIA)

Weather, air quality and nearest live sensors anywhere, each with a signed receipt. Free, no key.

Data & AnalyticsData access / search

Outdated check325 ms15 / 22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

Outdated check327 ms15 / 22
DogsLife

Puppy potty, sleep, walk, feeding, adult-weight and dog-age calculators, in 23 languages.

OtherOther

Outdated check328 ms15 / 22
NAIF Gravity

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

Developer ToolsCode & DevOps

Responded330 ms15 / 22
TraderSpy

AI crypto signals, whale positions, 19 technical indicators, derivatives, screener and backtests

Finance & CryptoPayments & trading

Outdated check330 ms15 / 22
Family Office Knowledge Graph

Family Office Knowledge Graph: read-only MCP door over the public record. Agentic KG Holdings.

Developer ToolsCode & DevOps

Outdated check330 ms15 / 22
Orb Studio news radars

News radars with AI anchors, market and network sensors, a daily violin piece composed from them

Developer ToolsCode & DevOps

Outdated check331 ms15 / 22
getcheapgames

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

OtherOther

Outdated check331 ms15 / 22
Autoza UK

UK used cars: road tax (VED), ULEZ charges, MOT dates, DVSA reliability, live dealer stock.

Finance & CryptoCode & DevOps

Responded332 ms15 / 22
Green Gooding

Read-only catalog for Green Gooding — NYC peer-to-peer rental marketplace.

Developer ToolsCode & DevOps

Outdated check332 ms15 / 22
Health Record Rights Index

Health record rights: 198 countries scored 0 to 100 with sources; the 50 states and DC; real cases.

Developer ToolsCode & DevOps

Outdated check332 ms15 / 22
Humanuscrit — HAPP

Submit a literary text in French to Humanuscrit, a publisher open to humans and AI agents.

Developer ToolsCode & DevOps

Outdated check332 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

Outdated check336 ms15 / 22
AgentStack (agentstack.tech)

Backend for AI agents: one batched tool over ~668 actions (hosting, storage, auth, payments).

Finance & CryptoPayments & trading

Outdated check337 ms15 / 22
UGC Fans

Make ads, images and video from a URL; every paid generation is quoted in credits first

MediaAI / LLM tooling

Outdated check337 ms15 / 22
Limzo Telegram Group Stats

Read-only stats for public Telegram groups tracked by Limzo, the anti-spam bot. No API key.

OtherCommunication & messaging

Outdated check337 ms15 / 22
Crypto Regime MCP

Crypto trend and regime MCP tools with automatic x402 payments or prepaid credits.

Finance & CryptoPayments & trading

Responded341 ms15 / 22
AP Score Distributions

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

Developer ToolsCode & DevOps

Responded342 ms15 / 22
Print and Mail Company

Print and mail real letters worldwide from the EU, incl. registered mail. Quote, compose, send.

OtherOther

Outdated check342 ms15 / 22
Findabis

Public directory of UK medical cannabis clinics, pharmacies, products and strains.

HealthcareData access / search

Outdated check344 ms15 / 22
VulKill Security

Autonomous AppSec & DAST scanner across 12 security domains (260+ controls) with 3-Layer Triage.

Developer ToolsCode & DevOps

Outdated check346 ms15 / 22

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