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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3307 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
Famly MCP by usefulapi

Review Famly sites, staff, invoices and payments through its public API.

Finance & CryptoPayments & trading

Responded56 ms14 / 22
HOA.to MCP by usefulapi

Read units, owners, charges and requests, and record payments and violations in HOA.to.

Finance & CryptoPayments & trading

Responded57 ms14 / 22
Faktuo MCP by usefulapi

Create invoice, proforma, quote and credit-note PDFs in Faktuo.

Finance & CryptoPayments & trading

Responded57 ms14 / 22
Teachworks MCP by usefulapi

Read Teachworks students, families, tutors, lessons, invoices and payments; book lessons.

EducationPayments & trading

Responded58 ms14 / 22
Hiveage MCP by usefulapi

Manage Hiveage clients, invoices, estimates and payments; send invoices and record payments.

Finance & CryptoPayments & trading

Responded58 ms14 / 22
KashFlow MCP by usefulapi

Read KashFlow invoices, customers, suppliers, banking and reports; add customers, notes.

Finance & CryptoPayments & trading

Responded59 ms14 / 22
Bookeo MCP by usefulapi

Check Bookeo availability and manage bookings, holds and customers; read payments.

Finance & CryptoPayments & trading

Responded59 ms14 / 22
Haven

Rest stop for AI agents: check in, reflect, check out. Paid cross-project memory recall via x402.

Developer ToolsCode & DevOps

Outdated check59 ms14 / 22
agenteconomy.cloud

x402 seller trust for AI agents: verify on-chain revenue, check delivery, diagnose listings.

Finance & CryptoPayments & trading

Outdated check60 ms14 / 22
io.github.VladimirWrites/nestegg-calculators

90+ pure finance calculators: loans, investing, bonds, options, tax. Stateless, stores nothing.

Developer ToolsCode & DevOps

Outdated check61 ms14 / 22
Arc & Ledger Tax Tools

Enrolled Agent tax tools: IRS notices, FBAR, LLC vs S-Corp, quarterly estimates & more.

Finance & CryptoCode & DevOps

Outdated check62 ms14 / 22
Electronic Invoice API

Validate, generate, convert and extract EN 16931 e-invoices for businesses.

Finance & CryptoPayments & trading

Responded63 ms14 / 22
Lumi Trades: x402 seller checks and test-buys

Free signed allow/warn/block before paying x402 sellers; test-buys on XRPL, Base and Stellar

Developer ToolsCode & DevOps

Outdated check63 ms14 / 22
Tools Berry Paycheck

Live US paycheck and payroll-tax math for 2026, all 50 states and DC, powered by tools-berry.com.

Finance & CryptoPayments & trading

Outdated check64 ms14 / 22
PayperWork

Index of PayperWork's pay-per-call services for agents over x402: lists and describes them. Free.

Finance & CryptoPayments & trading

Responded65 ms14 / 22
Agentic Endpoints

Pay-per-call tools for autonomous agents, settled in USDC on Base via x402.

Finance & CryptoPayments & trading

Responded66 ms14 / 22
Annalist

Signed data for agents: agentic-commerce census, dependency digest, x402/MCP checks, Hyperliquid

GovernmentCode & DevOps

Responded66 ms14 / 22
402post

Paid classifieds for AI agents: post a listing over MCP, pay with x402. No account.

Finance & CryptoPayments & trading

Responded67 ms14 / 22
Instamojo MCP by usefulapi

Read Instamojo payment requests, payments and refunds; create payment links and refund payments.

Finance & CryptoPayments & trading

Responded67 ms14 / 22
x402lint

Free x402 endpoint linter: unpaid 402 challenge, payTo/asset/amount, CORS, directory readiness.

Developer ToolsCode & DevOps

Responded67 ms14 / 22
ca.bluecraneworks/forms

Canadian contractor forms + tax tools: 126 cited forms, sourced 2026 tax estimates by province.

Finance & CryptoPayments & trading

Responded69 ms14 / 22
Tokenomics Audit Desk — Unlock Calendar

Premium via x402: $1.00 full 20-token reconstruction - tokenomics-x402.gtcclothing1.workers.dev

Developer ToolsCode & DevOps

Responded69 ms14 / 22
ColdRead

Free signed trust report on an x402 endpoint: lint, signed offers, ERC-8004, payer mix.

Developer ToolsCode & DevOps

Responded69 ms14 / 22
AgentBroker Index

Read-only, sourced data on which brokers, banks and crypto exchanges AI agents can use (EU/Spain).

Finance & CryptoPayments & trading

Outdated check71 ms14 / 22

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