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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4709 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
S+ Money CIS Refund Calculator

Estimate a UK CIS construction subcontractor's tax refund for 2025-26 to 2027-28. Free, no sign-in.

Finance & CryptoPayments & trading

Responded121 ms13 / 22
AlertaSubastas

Search Spain's public auctions (BOE, Social Security, tax agency, notaries) with full asset records.

Finance & CryptoData access / search

Responded121 ms13 / 22
Canada Payroll — employer cost & take-home math (2026)

Verified 2026 Canadian payroll math: employer total cost, employee take-home, net-to-gross. Free.

Finance & CryptoPayments & trading

Responded124 ms13 / 22
FiltreCharbon

Search FAC charcoal filters, check specifications and prepare a checkout link for France or Belgium.

Finance & CryptoPayments & trading

Responded125 ms13 / 22
RIFK public knowledge

Public Croatian accounting guides and RIFK business information. No private client data.

Finance & CryptoPayments & trading

Responded126 ms13 / 22
OlaChillBus — Schengen Charter Coaches

Read-only Schengen coach vehicle information and quote guidance. No bookings or payments.

Finance & CryptoPayments & trading

Responded128 ms13 / 22
YappyKids shop

Children's furniture catalogue of YappyKids (Latvia): search, prices, stock, delivery. Read-only.

Finance & CryptoData access / search

Responded129 ms13 / 22
mdapi — HTML to Markdown for AI agents

Web page or HTML to clean LLM-ready Markdown or JSON. x402 pay-per-call, $0.005, no API key.

Finance & CryptoFile & docs

Responded131 ms13 / 22
io.github.SlambertDK/shelfatlas-catalog

Danish grocery catalog as MCP tools: live offers across all major chains, stores, EAN lookup, stock.

Finance & CryptoCode & DevOps

Outdated check131 ms13 / 22
xyz.cabalspy/wallet-tracker

KOL and smart money tracking on 5 chains, plus CabalSpy ID (SocialFi): verified traders, theses.

Finance & CryptoPayments & trading

Outdated check132 ms13 / 22
Zovo FBAR Currency Converter

Convert the maximum balance of each foreign bank account to US dollars at the U.S.

Finance & CryptoCode & DevOps

Responded133 ms13 / 22
Agent Reserve Protocol Authorization Firewall

Advisory policy preflight for AI-agent spend requests; never executes payments or accesses wallets.

Finance & CryptoPayments & trading

Responded134 ms13 / 22
dev.workers.sebastiaan-ba3.payverify/tools

Verify a Base USDC transaction or x402 settlement landed. Free, no account needed.

Finance & CryptoPayments & trading

Responded135 ms13 / 22
Basis Desk — crypto news & market data

Source-verified crypto news, live prices, whale transfers, token safety checks and the Daily Brief.

Finance & CryptoData access / search

Responded137 ms13 / 22
SIIL Ostomy Store

Shop SIIL clothing: discover products and sizes, then open a secure SIIL checkout link.

Finance & CryptoPayments & trading

Responded137 ms13 / 22
FarsiTools (paid)

Persian and Iranian utilities for agents: Jalali dates, national ID, IBAN, holidays. Paid via x402.

Finance & CryptoPayments & trading

Outdated check137 ms13 / 22
Kokomoji

Kokomoji NFTs, ERC-8004 agents, jobs, open board and docs. Paid tools return x402 payment terms.

Finance & CryptoPayments & trading

Responded138 ms13 / 22
nl.afhaalgroothandel/shop

Dutch family B2B wholesaler since 1992: toys, gifts, party and seasonal items from own stock

Finance & CryptoPayments & trading

Outdated check139 ms13 / 22
io.github.f-tiger/agiscorecard-web3-workbench

AGI Scorecard Web3 Workbench: ten free deterministic review tools (stablecoin, gas, zkML, agents).

Finance & CryptoPayments & trading

Responded140 ms13 / 22
Zovo Invoice Ledger

Put a batch of supplier invoices into one spreadsheet with net, tax and gross totals.

Finance & CryptoFile & docs

Responded141 ms13 / 22
FreelancerTax — Canadian self-employed tax math

Verified Canadian self-employed tax math: SE tax, CPP, GST/HST, instalments, CRA deadlines. Free.

Finance & CryptoPayments & trading

Responded141 ms13 / 22
Invoiceer e-invoicing tools

Create and validate XRechnung, ZUGFeRD and Peppol e-invoices (KoSIT); Peppol lookup, rule help.

Finance & CryptoPayments & trading

Responded142 ms13 / 22
Zovo Invoice Reader

Turns invoice PDFs into one spreadsheet and checks the tax, totals and money math of each invoice.

Finance & CryptoFile & docs

Responded143 ms13 / 22
io.github.stillmarcus24/stillos-kya

Counterparty due-diligence infrastructure: OFAC screening, on-chain risk, signed verdicts.

Finance & CryptoCode & DevOps

Outdated check143 ms13 / 22

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