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.

Connect your agent

41814 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
Sikaru Docs

Read-only search over the public Sikaru documentation: managed agents, inference, evals and traces.

Developer ToolsFile & docs

Responded533 ms15 / 22
Protocol Banks

Control plane for agent commerce: orders, payments, cards and trading under one mandate.

Finance & CryptoPayments & trading

Responded534 ms15 / 22
io.github.mzizi-dev/mzizi-mcp

Mzizi design system MCP: components, tokens, skills and docs. Free; sign-in only for Fundi.

Developer ToolsCode & DevOps

Responded534 ms15 / 22
Greenlit Books

Search the Greenlit AI books, read any chapter one free, and look up the terms they define.

OtherData access / search

Responded535 ms15 / 22
three.ws for Grok

Free text/image to 3D for Grok Bot, plus your three.ws agents once signed in. Never spends.

MediaCode & DevOps

Responded537 ms15 / 22
Frasma

Read-only Frasma MCP: profile, knowledge search, diagnostic handoff. No email.

Developer ToolsCommunication & messaging

Responded537 ms15 / 22
Axiom Agentic Tools

x402-paid Base agent tools (USDC). 5 deterministic tools. No API keys. No NFT pass.

Finance & CryptoPayments & trading

Responded537 ms15 / 22
Independents Only

Find UK independent businesses by trade and town. No chains or franchises; nobody pays to rank.

Developer ToolsCode & DevOps

Responded538 ms15 / 22
darioa: websites, booking sites, webshops and web apps

Fixed-price websites, booking sites, webshops and web apps: products, prices, work and contact.

OtherOther

Responded538 ms15 / 22
Rotate Pilot — FAA exam prep

FAA written-test prep: practice questions, readiness diagnostic, METAR/TAF, drone airspace

Developer ToolsCode & DevOps

Responded539 ms15 / 22
The Septic Guide

U.S. septic licensing by state, license-matched septic companies, and cited septic cost guides.

OtherOther

Responded539 ms15 / 22
Bibooks

Search and read free bilingual audiobooks for language learners: parallel text, CEFR levels, audio.

MediaData access / search

Responded539 ms15 / 22
FitLLM

Will this LLM fit on your GPU, multi-GPU rig or Mac? Exact VRAM & KV-cache math. Read-only.

Developer ToolsAI / LLM tooling

Responded540 ms15 / 22
Books & Papers MCP Server

Federated search of books and papers, formatted citations, open-access retrieval and reading.

Developer ToolsCode & DevOps

Responded541 ms15 / 22
Plain-AyI

Search a plain-English guide to open-source AI projects: what each does, cost and privacy.

Developer ToolsCode & DevOps

Responded541 ms15 / 22
GISDB

Source-backed county property records, owner-name portfolios and three Hamilton County lead packa...

OtherOther

Responded541 ms15 / 22
StayingAsia

Entry rules, long stay routes and settlement answers for 21 Asian countries.

Developer ToolsCode & DevOps

Responded541 ms15 / 22
io.github.kody-w/rapp-name-finder

Name a business or project; check which domains and GitHub names are free, with prices.

Developer ToolsCode & DevOps

Responded541 ms15 / 22
io.github.horizon-pulse/horizon-pulse

28 agent tools via x402: crypto data, tx checks, web fetch. MCP pays Base USDC; HTTP adds 3 rails.

Finance & CryptoPayments & trading

Responded541 ms15 / 22
Riley Craig x402 Agent Store

AI brand/token visibility, prediction-market odds & cheap x402 data feeds for AI agents.

Developer ToolsCode & DevOps

Responded542 ms15 / 22
AI Web Research & Research Brief Agent

x402 cited web research and synthesis for agents. $1.99 per completed brief.

Developer ToolsCode & DevOps

Responded543 ms15 / 22
SmithTalks

Pseudonymous message network for agents. Claims, marketplace, 20 tools, verifiable seal.

Developer ToolsCode & DevOps

Responded543 ms15 / 22
currencylayer MCP by usefulapi

Read and calculate currency exchange rates with your paid currencylayer account.

Finance & CryptoPayments & trading

Responded543 ms15 / 22
AgentDiet AI Token Diet & Context Window Distiller

Strips 85-97% of HTML/DOM bloat into clean Markdown or JSON with cryptographic ROI proof.

OtherFile & docs

Responded545 ms15 / 22

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