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

4034 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
US compliance and books health

US company filing obligations, plus a 25-check bookkeeping diagnostic. Sourced, dated, no signup.

Finance & CryptoPayments & trading

Responded513 ms15 / 22
0xinsider

Polymarket sports and esports data: wallet grades on settled P&L, large trades, markets.

Finance & CryptoPayments & trading

Responded520 ms15 / 22
VibeRaven

Check Supabase migrations for RLS and grant gaps; fixes for Supabase, Vercel, Stripe errors.

Finance & CryptoPayments & trading

Responded522 ms15 / 22
Jockey Delivery — Same-Day Local & Nationwide AI Commerce

Search live store shelves, verify delivery windows, and run instant AI agent checkouts.

Finance & CryptoPayments & trading

Responded522 ms15 / 22
three.ws 3D Studio (free)

Free text/image → 3D: generate, rig, avatar-ify, and refine GLB models. No auth, no payment.

Finance & CryptoPayments & trading

Responded529 ms15 / 22
ARC: agent checkout reachability

Free, no sign-in MCP: can AI agents reach checkout at a store? Try: Use ARC to check allbirds.com

Finance & CryptoPayments & trading

Responded538 ms15 / 22
Florida Business Verify (Sunbiz records)

Verify a Florida business in official Sunbiz records: status, agent, officers. 0.10 USDC via x402.

Finance & CryptoPayments & trading

Responded544 ms15 / 22
Vaaya

Paid APIs and tokenized shares for agents. Prepaid funding, including authorized Instinct checkout.

Finance & CryptoPayments & trading

Responded552 ms15 / 22
Axiom Agentic Tools

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

Finance & CryptoPayments & trading

Responded553 ms15 / 22
Mazza Group AI APIs

23 pay-per-call AI APIs for agents: x402, USDC on Base, no API keys.

Finance & CryptoPayments & trading

Responded566 ms15 / 22
X402-Broker Global A2A, MCP & x402 Super-Marketplace

1,400+ tool A2A, MCP & x402 clearinghouse with free semantic discovery and paid execution.

Finance & CryptoPayments & trading

Responded573 ms15 / 22
Conduit Agentic Commerce

Search multi-merchant supply, checkout, and track orders via MCP.

Finance & CryptoPayments & trading

Responded575 ms15 / 22
Tuki — Travel Marketplace (Chile y Latinoamérica)

Tours, alojamientos y traslados en Chile/LATAM con checkout único y precios de operadores locales.

Finance & CryptoPayments & trading

Responded579 ms15 / 22
Veredicto Humano

Ask a real human (not an LLM) for a judgment, $0.10 USDC via x402. The result returns to the agent.

Finance & CryptoPayments & trading

Responded587 ms15 / 22
The White Report

The White Report news archive: crypto and AI stories, search, full text, ticker, graded calls.

Finance & CryptoPayments & trading

Responded587 ms15 / 22
Astro Agents - verifiable planetary timing data and astrology

Verifiable market-timing data for trading bots: Gann lines, events, analogues. Pay per call in MCP.

Finance & CryptoPayments & trading

Responded587 ms15 / 22
paidfor

Check an x402 seller before paying: verdict, failure rate and evidence from paid calls on Base.

Finance & CryptoPayments & trading

Responded589 ms15 / 22
Agent Safety Index

Is this AI agent safe with a wallet? Signed x402 Agent Safety exam results, and live demos.

Finance & CryptoPayments & trading

Responded596 ms15 / 22
SavingsLast retirement calculators

Retirement drawdown, 72(t) SEPP, RMD, Roth conversion, Social Security and state-tax calculators.

Finance & CryptoPayments & trading

Responded603 ms15 / 22
presign-guard

Safe to sign? EVM/Solana/XRPL/Algorand/Stellar txs, permits, tokens; OFAC screen: green/orange/red

Finance & CryptoPayments & trading

Responded613 ms15 / 22
Smarter Weather Developer Onboarding

Onboard to Smarter Weather from your agent: plans, docs, sign-up, API keys, MCP config, billing.

Finance & CryptoPayments & trading

Responded620 ms15 / 22
Agent402.Tools: pay-per-call web tools

Agentic Finance: 500+ agent tools, multi-chain USDC over x402 or MPP, or free via proof-of-work

Finance & CryptoPayments & trading

Responded634 ms15 / 22
Lumière PayCheck

Check x402 endpoints before your AI agent pays: grades, payment checks, refunds, receipts.

Finance & CryptoPayments & trading

Responded635 ms15 / 22
中国社保与薪税计算器 (China Shebao & Payroll Tax MCP)

中国 31 省市社保政策、392 城五险一金基数与费率、税后工资、个税汇算、年终奖与养老金测算引擎。

Finance & CryptoPayments & trading

Responded639 ms15 / 22

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