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

3334 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
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Outdated check176 ms13 / 22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
Random Number Generator

Generates cryptographically random integers in a given range, using crypto/rand.

Finance & CryptoPayments & trading

Responded182 ms13 / 22
Aeralas Maps

Print-ready annotated aerial maps of US addresses for real estate and engineering, paid via x402.

Real Estate & PropertyPayments & trading

Responded187 ms13 / 22
AgentStall: Africa and global data for agents

Holidays and business days (220+ countries), WHOIS, FX, phishing and DMARC checks, SA tenders. x402.

Finance & CryptoPayments & trading

Responded188 ms13 / 22
Bindler: UAE Corporate Tax, CSRD scope, EU AI Act and CBAM calculators

UAE Corporate Tax, CSRD scope, EU AI Act risk class and CBAM cost, each line citing its source law

Finance & CryptoPayments & trading

Responded188 ms13 / 22
PagoFix

Unpaid EU B2B invoices: late-payment interest, reminder letters, European payment order draft.

Finance & CryptoPayments & trading

Outdated check188 ms13 / 22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

Responded189 ms13 / 22
OlaChill Vietnam — Travel and Private Transport

Vietnam coach and private-car catalog plus quote instructions. Read-only; no bookings or payments.

Finance & CryptoPayments & trading

Responded190 ms13 / 22
E-Invoice Map

Free, read-only e-invoicing data: mandate dates, Peppol providers, validation-error explainers.

Finance & CryptoPayments & trading

Responded193 ms13 / 22
Bitstore exchange

Crypto and fiat exchange rates, limits and ready exchange links on bitstore.pro.

Finance & CryptoPayments & trading

Responded197 ms13 / 22
Pocket Network Agentic Marketplace

Search and call pay-per-request data services, paying in USDC on Base with x402.

Finance & CryptoPayments & trading

Responded197 ms13 / 22
ToolFit + MCPCheck

Audit, pin and diff agent tool lists; preflight and watch remote MCP servers. Free tier; x402.

Finance & CryptoPayments & trading

Responded201 ms13 / 22
DosePlot Agent API

PK serum simulation, reconstitution math and compound data for agents. Paid tools $0.01 via x402.

Finance & CryptoPayments & trading

Responded202 ms13 / 22
BizStats.me

Montenegro company filings, registry records, public tenders, Treasury payments and risk lists.

Finance & CryptoPayments & trading

Responded204 ms13 / 22
RocketChange exchange

Crypto and fiat exchange rates, limits and ready exchange links on rocketchange.io.

Finance & CryptoPayments & trading

Responded205 ms13 / 22
com.lvlltd/skill-market

x402 skill catalog on lvlltd.com — search, quote, pay with Base USDC, unlock sealed packs.

Finance & CryptoPayments & trading

Responded205 ms13 / 22
Context Relay

Compact, citation-verifiable public web context for AI agents, paid per use with x402.

Developer ToolsCode & DevOps

Outdated check205 ms13 / 22
Binyan.im · בניינים

Building committee (ועד בית) finances: apartments, payments, expenses, reports.

Finance & CryptoPayments & trading

Responded211 ms13 / 22
Agent Bazaar

Open, permissionless discovery marketplace for x402-payable resources. No account or KYC required.

Developer ToolsCode & DevOps

Outdated check215 ms13 / 22
India Salary Calculator

India 2026-27: full income tax return (old vs new regime), net salary, gross for net, employer cost

Finance & CryptoPayments & trading

Outdated check215 ms13 / 22

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