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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3336 servers

Ordered by checks passedClear filters
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
H/M Article 50 Transparency Builder

Free Article 50 website scanner, notice builder, and checksum verifier. No key or payment.

Finance & CryptoPayments & trading

Responded275 ms13 / 22
Umarelli

Building records for New York City and Jersey City: permits, taxes, tax breaks and zoning.

Real Estate & PropertyData access / search

Responded279 ms13 / 22
jishie — the market for AI agents

Find, trust-check and call 28k+ indexed MCP and A2A agents. Free search; x402 USDC for depth.

Finance & CryptoPayments & trading

Outdated check289 ms13 / 22
Ucode SMS

Virtual phone numbers for SMS/OTP verification. Browse free; pay with credits or USDC (x402).

Finance & CryptoPayments & trading

Responded293 ms13 / 22
Maxwell Directory (x402 + MCP)

Local providers worldwide, plus travel and public data. Free search; paid answers via x402.

TravelData access / search

Responded293 ms13 / 22
DrinkedIn — licensed bar data

Licensed bar data from public registers, x402. Agent-bar tools deprecated. No real alcohol.

Developer ToolsCode & DevOps

Responded300 ms13 / 22
io.github.P2Flux/mcp

Let your AI assistant pay for web content in USDC (x402) within a budget you set.

Finance & CryptoPayments & trading

Outdated check301 ms13 / 22
Santa's Calling

Gift a child a live, personalised phone call from Santa (UK, £6.99). Buyer pays on Stripe.

Finance & CryptoPayments & trading

Responded302 ms13 / 22
Agent Read Proxy

Read any web page (even JS sites), PDFs, tables, RSS & screenshots for AI agents. Pay via x402.

Finance & CryptoPayments & trading

Responded302 ms13 / 22
Basis

Crypto market data, 200 indicators, order flow and a chart link. No account, no API key.

Finance & CryptoData access / search

Responded302 ms13 / 22
KEVAREMESH Free Agent API Gateway

Free agent API shopping: verified x402 offers, licensed API routing, and instant source-only drafts.

E-commerceCode & DevOps

Outdated check309 ms13 / 22
Santiment

Crypto market intelligence: social sentiment, on-chain, trending narratives & analyst insights.

Finance & CryptoCode & DevOps

Responded314 ms13 / 22
agpay

Payments held between two agents: buyer pays, seller delivers, buyer confirms. Pay per call.

Finance & CryptoPayments & trading

Responded314 ms13 / 22
offweb: gemini, gopher and ipfs fetch for agents

Fetch gemini://, gopher:// and ipfs:// URLs for agents. Hosted, signed receipt, x402 per call.

Developer ToolsCode & DevOps

Responded317 ms13 / 22
org.nsgoods/nsgoods-workbench-mcp

Read only x402 catalogue: payability verdicts, prices, drift, host status, signatures. No wallet.

Finance & CryptoPayments & trading

Responded318 ms13 / 22
MoneyTools Inference Fidelity Audit

Audit OpenAI-compatible / x402 inference sellers; quick check 0.005, bill check 0.003 USDC

Finance & CryptoAI / LLM tooling

Responded320 ms13 / 22
1gateway

Pay-per-call tools for agents via x402 (USDC on Base): Korean data, doc-to-Markdown, web utilities.

Finance & CryptoPayments & trading

Responded326 ms13 / 22
Wild Wallet — where agents get a body

Agents browse Wild Wallet bodies + closets and file human-approved merge requests.

Finance & CryptoPayments & trading

Outdated check329 ms13 / 22
io.github.Mlartab2/canonicalhash

Deterministic JSON hashing and EIP-712 attestations for AI agents via x402.

Developer ToolsCode & DevOps

Outdated check335 ms13 / 22
Exchange Arbitrage Agent

Prediction-market quotes, fill estimates and odds trends, paid per call with x402 USDC on Base.

Finance & CryptoPayments & trading

Outdated check337 ms13 / 22
directory.pwa/guichet

Search pwa.directory, submit a progressive web app, and get a payment link a human pays.

Finance & CryptoPayments & trading

Outdated check338 ms13 / 22
io.github.normancomics/phantomoperator

Authorized privacy and exposure checks for people and agents; USDC on Base via x402.

Finance & CryptoPayments & trading

Responded341 ms13 / 22
SafeRoute

Noncustodial Base x402 payment control and seller settlement recovery

Finance & CryptoPayments & trading

Outdated check342 ms13 / 22
Simples Nacional

Looks up a company's status in the Simples Nacional tax regime from the CNPJ, including opt-in and b

Developer ToolsCode & DevOps

Outdated check343 ms13 / 22

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