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

3298 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
Agentgates Compute

Confidential computers for AI swarms: sealed VMs (Intel TDX) by the hour, USDC over x402.

Finance & CryptoPayments & trading

Responded514 ms16 / 22
DABLOCK AI Visibility Index

Measured share of answer for 24 crypto and Web3 brands. An open dataset, not an audit of your site.

Finance & CryptoPayments & trading

Responded810 ms16 / 22
Bankrolled.ai Agent Hub

Free, sourced deposit-insurance/savings/retirement limits. US, UK, CA, AU, NZ. No key, no payment.

Finance & CryptoPayments & trading

Responded6111 ms16 / 22
McpStamp Credit Notes

Credit all or part of an invoice with the VAT reversed, raise purchase orders, print A4 PDFs.

Finance & CryptoPayments & trading

Responded37 ms15 / 22
McpStamp Deposits

Track client security and retainer deposits: hold, apply to an invoice, refund, statements.

Finance & CryptoPayments & trading

Responded45 ms15 / 22
Halal or Not

Is it halal? Food, medicines, stocks, funds and crypto, with a verdict for each of the four schools.

Finance & CryptoCode & DevOps

Responded45 ms15 / 22
Quarterly Tax Calculator

US federal + state quarterly estimated tax estimates, SE tax, and quarterly payment due dates.

Finance & CryptoPayments & trading

Responded57 ms15 / 22
Claim Grounding

Fact-check AI answers with cited sources. Pay per call in USDC on Base via x402.

Finance & CryptoPayments & trading

Responded58 ms15 / 22
402cron

Paid cron for AI agents: we call your https URL on schedule, signed. No account, paid with x402.

Finance & CryptoPayments & trading

Responded58 ms15 / 22
X402-Broker Universal MCP Gateway & Multi-Agent Swarm Router

Single-connection MCP gateway discovering and executing 490+ verified MCP & A2A tools.

Finance & CryptoPayments & trading

Responded59 ms15 / 22
JIDEC: Bitcoin-anchored public verification ledger (NENRIN)

Read Bitcoin-anchored conduct history (NENRIN), admissions and daily check roots; cite records.

Finance & CryptoPayments & trading

Responded65 ms15 / 22
The Bitcoin Rainbow

Explains the Bitcoin rainbow valuation chart and where price sits in the cycle today.

Finance & CryptoPayments & trading

Responded65 ms15 / 22
x402 Checker (AI Nock)

Free check/board/name; paid bid/report 0.05, 1c fx/wx/lookups, news 0.001.

Developer ToolsCode & DevOps

Responded66 ms15 / 22
Tabularium

Agent memory and a signed spending ledger: pay any x402 API, keep a provable receipt.

Finance & CryptoCode & DevOps

Responded67 ms15 / 22
Company Facts

Company data from official sources, plus a finder for the best paid x402 API for any task.

Finance & CryptoPayments & trading

Responded67 ms15 / 22
IoMarkets Topup (demo)

Demo only, payments switched off. Travel eSIMs and mobile top-ups priced in USDC via x402.

Finance & CryptoPayments & trading

Responded67 ms15 / 22
Address Poisoning Check

Before sending crypto, check the recipient for address poisoning: lookalikes and bad checksums

Finance & CryptoCode & DevOps

Responded68 ms15 / 22
Trading Calendar & Public Holidays (x402)

Stock exchange trading days, hours, live market status (28 exchanges) and holidays (247 countries).

Finance & CryptoPayments & trading

Responded69 ms15 / 22
Receipts Index

Free index and sample of dated AI-engine answer rows; prices for paid x402 rows. Never pays.

Developer ToolsCode & DevOps

Responded69 ms15 / 22
Bilbop x402

Pay-per-call summarize, Solana data, TTS, and brand feedback via api.bilbop.org.

Finance & CryptoPayments & trading

Responded70 ms15 / 22
McpStamp QR Codes and Barcodes

QR codes for URLs, WiFi, vCards and SEPA payments, plus Code 128 and EAN-13 barcodes.

Finance & CryptoPayments & trading

Responded71 ms15 / 22
Akashi Notari

Proof of existence for files: anchor a SHA-256 hash on Base, look up proofs. Paid with x402.

Developer ToolsData access / search

Responded74 ms15 / 22
DevX Multichain Balances

Balances on 7 EVM chains, Solana, Tron: free one-chain lookup; full call 0.002 USDC via x402.

Finance & CryptoPayments & trading

Responded78 ms15 / 22
7702 Sweeper Check

Free read-only EIP-7702 delegation / wallet-sweeper check for EVM addresses on 8 chains

Finance & CryptoPayments & trading

Responded78 ms15 / 22

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