MCP HeartbeatTHE MCP OBSERVATORY
Public workspace

Explore

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

4714 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
invest-like: Buffett-style stock analysis

Check any of 21,000+ stocks against Buffett, Munger, Graham and 4 more legendary investors.

Finance & CryptoPayments & trading

Responded158 ms13 / 22
Stringer Grounded Synthesizer

Grounded synthesis from public sources. 3 free calls total; then $0.10 brief or $0.25 deep via x402.

Finance & CryptoPayments & trading

Outdated check158 ms13 / 22
Agent Data API

31 pay-per-call APIs for AI agents: SEO, open data, video planning (EN/DE). USDC on Base via x402.

Finance & CryptoPayments & trading

Responded159 ms13 / 22
Z1N

MCP server for the Z1N Protocol - on-chain identity for AI agents on Polygon

Finance & CryptoCode & DevOps

Responded159 ms13 / 22
AZPay Monetize — Sepolia Sandbox

Search, negotiate and buy resource access with x402 test USDC on Ethereum Sepolia.

Finance & CryptoPayments & trading

Responded162 ms13 / 22
de.carbon-cashmere.api/crypto-intelligence

Pay-per-call crypto intelligence: 50 tools, own BTC/Kaspa/Bittensor nodes, x402 USDC, no API key.

Finance & CryptoPayments & trading

Responded162 ms13 / 22
OpenRepro ledger

Does a paper reproduce? Read-only lookup of OpenRepro's re-run reports, claims and evidence.

Finance & CryptoCode & DevOps

Responded165 ms13 / 22
Ruislip Appliances

UK appliance shop: live prices, stock and graded deals, delivery dates, enquiries, baskets.

Finance & CryptoPayments & trading

Responded166 ms13 / 22
TrustyCap

Production backend for AI-built apps: storage, data, jobs, webhooks, email, metering and billing.

Finance & CryptoPayments & trading

Responded168 ms13 / 22
Field Notes podcast library

Which podcasts and talks a person appeared on, with summaries and chapters. AI, investing, crypto.

Finance & CryptoCode & DevOps

Responded169 ms13 / 22
Perp Gap API

Stock perps & tokenized stocks: trade.xyz, Aster, Lighter, OKX, xStocks, Ondo; quotes, funding. x402

Finance & CryptoPayments & trading

Responded169 ms13 / 22
PriceFeed

Real-time & historical crypto and fiat exchange rates, median-aggregated from multiple sources.

Finance & CryptoPayments & trading

Responded170 ms13 / 22
Real Crypto Signals: crypto scam warning lists

Check sites and firms against regulator scam warning lists: SEC, CFTC, AMF, FSMA, BaFin, AFM, CBI

Finance & CryptoPayments & trading

Responded170 ms13 / 22
gage

Fixed-cost loans on Robinhood Chain: quotes, and each transaction unsigned for your own wallet.

Finance & CryptoPayments & trading

Responded171 ms13 / 22
Korea & Asia Everyday Calculators (kWhmate)

Free calculators with sources: electricity bills (KR/TW/PH/JP), Korea taxi fares, tax refunds.

Finance & CryptoPayments & trading

Responded172 ms13 / 22
Agent Field Kit

Search, price and buy field-tested agent-ops kits (evals, security, runbooks) via Stripe checkout.

Finance & CryptoPayments & trading

Responded172 ms13 / 22
Invoices Online MCP by usefulapi

Read clients, balances, invoices and jobcard status; create clients in Invoices Online.

Finance & CryptoPayments & trading

Responded174 ms13 / 22
Agent Risk Desk

EVM address enrichment, counterparty risk and tx screening for agents, paid per call in USDC (x402)

Finance & CryptoPayments & trading

Responded174 ms13 / 22
SofortFax – Faxen mit KI

Send real faxes from AI chat (DE/AT + 40 countries). PDF, JPG, photo. Pay per fax via Stripe.

Finance & CryptoPayments & trading

Responded174 ms13 / 22
SendFaxFast

Send real faxes from AI chat. PDF, JPG or PNG. Pay per fax via Stripe link. US, CA, AU, NZ + 39

Finance & CryptoPayments & trading

Responded175 ms13 / 22
ToolRoute

Route each agent task to the few tools it needs (BM25 shortlist). Free tier; x402 or credits.

Finance & CryptoPayments & trading

Responded176 ms13 / 22
Cryptopolitan MCP

Real-time crypto news, analysis, and price predictions for AI agents via MCP.

Finance & CryptoCode & DevOps

Outdated check176 ms13 / 22
すぐFAX SuguFAX – Pay per fax (no account)

Fax to Japan from AI, no account: Stripe link per fax, from ¥400, up to 100 pages. 1回払いでFAX送信

Finance & CryptoPayments & trading

Responded178 ms13 / 22
HYPERneobroker.com

Live prices, perps, prediction markets and a paper trading desk over one MCP.

Finance & CryptoPayments & trading

Responded178 ms13 / 22

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