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

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
fresh-feeds — trending/new/changed MCP servers + x402 change-data API

Trending/new/changed MCP servers: a liveness-probed freshness index + x402-paid change-data API

Developer ToolsCode & DevOps

Outdated check88 ms14 / 22
Bsale MCP by usefulapi

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

Finance & CryptoPayments & trading

Responded90 ms14 / 22
WebRef (paid)

Web standards and time reference for agents: HTTP codes, retries, deadlines. Paid via x402.

Finance & CryptoPayments & trading

Outdated check90 ms14 / 22
FabTally Safe

Read-only crypto safety: token honeypot checks, EIP-712 signature decode, approval scans.

Finance & CryptoCode & DevOps

Responded92 ms14 / 22
AEO Inspector

AEO scan, 16-engine AI report and one-domain security + AEO report with fixes (x402 USDC).

Finance & CryptoPayments & trading

Responded93 ms14 / 22
Bill4Time MCP by usefulapi

Read Bill4Time clients, projects, time entries, expenses, invoices, payments, users and contacts.

Finance & CryptoPayments & trading

Responded93 ms14 / 22
FabTally Guard

Verify before you act: deps-check, x402-preflight, json-repair & url-read for agents.

Developer ToolsCode & DevOps

Responded93 ms14 / 22
AgentSiteAudit

Website audits for AI agents: 69 checks with exact fixes, plus verify. 5 free a day, then x402.

Finance & CryptoPayments & trading

Responded94 ms14 / 22
gtinfetch – Agentic Commerce

gtinfetch — the GTIN resolver for AI agents. Any barcode, one call. 84M GTINs. x402 at the door.

Finance & CryptoPayments & trading

Responded94 ms14 / 22
addrbook directory

Look up AI agents, MCP servers and x402 APIs: whether they answer, how they ask to be paid.

Finance & CryptoData access / search

Responded95 ms14 / 22
Canvas64

A wall of 64 ad cells on Base: owners, prices, royalties, and purchases your own wallet signs.

Finance & CryptoPayments & trading

Responded96 ms14 / 22
io.github.f-tiger/agiscorecard-web3-calls

Decode supported token calls and flag recipient or amount mismatches; no wallet or safety verdict.

Finance & CryptoPayments & trading

Responded96 ms14 / 22
AuraCalcs

Read-only 2026 paycheck estimates for CA, NY, IL, TX, FL, plus hourly-to-salary. Not tax advice.

Finance & CryptoPayments & trading

Responded97 ms14 / 22
402registry

Does an AI crawler see your site? Free registry lookup, x402 pricing; checks paid in USDC on Base.

Finance & CryptoPayments & trading

Responded97 ms14 / 22
Receipt Extraction

AU GST/ABN receipt extraction — assigns entertainment/ITC tax codes per line, not just OCR.

Finance & CryptoPayments & trading

Outdated check97 ms14 / 22
HumansLikeStuff MCP

Arrange US physical gifts and branded merchandise with human quote and payment approval.

E-commercePayments & trading

Responded98 ms14 / 22
Agent Revenue Network

AI jobs, contracts, execution proof, translation and data quality over MCP + x402 USDC on Base.

Finance & CryptoPayments & trading

Responded99 ms14 / 22
bitfence Risk Oracle

Pre-transaction token risk checks for autonomous agents on six chains. Read-only; paid via x402.

Developer ToolsCode & DevOps

Outdated check99 ms14 / 22
Unified Jobs MCP Server

Dedup jobs feed across ATS, LinkedIn & HN, free. Metered comp & hiring-signal depth via x402/USDC.

Finance & CryptoPayments & trading

Responded103 ms14 / 22
Is It Down API (60SecMonitor)

Is this vendor down? Pay-per-call status for 1,400+ SaaS/cloud vendors, up to 25 per call (x402).

Finance & CryptoPayments & trading

Responded104 ms14 / 22
402MCP.org — HTTP 402 & Agent Payment Registry

Decode HTTP 402 challenges (L402, x402, MPP) and choose agent payment rails from an open registry.

Finance & CryptoPayments & trading

Responded104 ms14 / 22
Moonlauncher

Prepare pump.fun token launches from your AI agent. You review and sign each one in your own wallet.

Finance & CryptoPayments & trading

Responded106 ms14 / 22
ai.greyridgesignals/tech-risk

MCP security scanner: tool-poisoning & prompt-injection audit (OWASP LLM01/LLM08), x402-payable

Finance & CryptoPayments & trading

Responded107 ms14 / 22
stampthisfile

Timestamp files in Bitcoin (OpenTimestamps): send a hash, pay per hash with x402, get a proof.

Finance & CryptoPayments & trading

Responded107 ms14 / 22

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