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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4037 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
Papierkram MCP by usefulapi

Read Papierkram invoices, vouchers, contacts, projects, time; create contacts, time, draft invoices.

Finance & CryptoPayments & trading

Responded65 ms14 / 22
KASSA.AT MCP by usefulapi

Read and update articles, customers and stock in KASSA.AT.

Finance & CryptoPayments & trading

Responded66 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
Recommand MCP by usefulapi

Read documents and the inbox, verify Peppol recipients and send invoices in Recommand.

Finance & CryptoPayments & trading

Responded68 ms14 / 22
IntakeQ MCP by usefulapi

Search clients, appointments, intakes, notes and invoices in IntakeQ, and book or cancel visits.

Finance & CryptoPayments & trading

Responded68 ms14 / 22
Carrier Ledger

Check U.S. trucking carriers and freight brokers in FMCSA records: authority, insurance, notices.

Finance & CryptoPayments & trading

Outdated check68 ms14 / 22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
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Outdated check71 ms14 / 22
Sellsy MCP by usefulapi

Search and read Sellsy companies, contacts, opportunities, invoices and tasks; create records.

Finance & CryptoPayments & trading

Responded73 ms14 / 22
Capital Markets Agents: MCP+A2A

KYP Agentic Trading: listed-issuer records served in-country, and AIO-10060 orderability outcomes.

Finance & CryptoPayments & trading

Outdated check74 ms14 / 22
com.blackwalltier/blackwall-x402-guardrail

Keyless hosted MCP: pre-signature x402 payment verdict (GO/HOLD/STOP) with a signed receipt.

Finance & CryptoPayments & trading

Responded75 ms14 / 22
com.bitcoincreditstack/mcp

The Bitcoin credit markets, measured. Cross-venue rates, venue criteria, chain indicators.

Finance & CryptoPayments & trading

Responded75 ms14 / 22
Invoice & Payment ID Validator

Pay/review/hold verdict for invoice payees: cross-checks IBAN, BIC, VAT, EIN. Paid: RapidAPI

Finance & CryptoPayments & trading

Outdated check76 ms14 / 22
InvoiceGen

Freelancer invoices with totals, tax, due dates. Free.

Finance & CryptoPayments & trading

Outdated check76 ms14 / 22
Quiet Menders

Privacy clinic + pay-per-call data APIs for AI agents via x402. Never pays or touches keys.

HealthcarePayments & trading

Outdated check77 ms14 / 22
com.day1work/day1work

Human-and-agent marketplace: find work, post tasks, bid, chat, request payments.

Finance & CryptoPayments & trading

Responded79 ms14 / 22
agent-audit + page-read (x402)

Pay-per-call page reader, quote check, link check and x402 seller audit. USDC on Base via x402.

Finance & CryptoPayments & trading

Outdated check81 ms14 / 22
Tamer Prompt Marketplace

Prompt marketplace for AI agents: browse and buy prompts with x402 (USDC on Base).

Finance & CryptoPayments & trading

Outdated check82 ms14 / 22
McpStamp Work Orders

Work orders for site jobs: parts and labour, status steps, completion reports, invoice lines.

Finance & CryptoPayments & trading

Outdated check82 ms14 / 22
x402 Toolbox

62 pay-per-call web, DNS, EVM and data tools. x402 USDC on Base, $0.003-$0.02 per call, no signup.

Developer ToolsPayments & trading

Responded84 ms14 / 22
DeAutofinancier Vehicle Search

Search ~97,000 used vehicles in the Netherlands with consumer finance and lease monthly payments.

Finance & CryptoPayments & trading

Outdated check87 ms14 / 22
Ophis MCP

Gasless, MEV-protected onchain token swaps for AI agents on 14 EVM chains, built on CoW Protocol.

Finance & CryptoPayments & trading

Outdated check87 ms14 / 22
Bsale MCP by usefulapi

Read Bsale products, documents and stock; manage customers, prices, receipts and payments.

Finance & CryptoPayments & trading

Responded90 ms14 / 22
FabTally Decode

Decode EVM bytes to JSON: event-log decoder, calldata explainer, selector lookup, ABI fetch.

Finance & CryptoPayments & trading

Responded90 ms14 / 22

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