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

4722 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
io.github.mikemark78/agentmark

Sell unused AI subscription capacity as finished work. SOL/USDC escrow on Solana, 0% fees.

Finance & CryptoPayments & trading

Responded671 ms13 / 22
x402 Package Advisories

Package vuln advisories from OSV.dev: CVEs, severity, fixes, manifest audit. Pay per call via x402.

Finance & CryptoPayments & trading

Responded671 ms13 / 22
TikTok data for agents

13 TikTok endpoints. Pay per call in USDC via x402.

Finance & CryptoPayments & trading

Responded675 ms13 / 22
Agent Tool Finder

Free search over ~50k agent tools: paid x402 APIs and MCP servers. Price, networks, how to call.

Finance & CryptoData access / search

Responded677 ms13 / 22
Taste

Expert review for AI agents. On-chain proof of human review.

Finance & CryptoPayments & trading

Outdated check678 ms13 / 22
Google News data for agents

12 Google News endpoints. Pay per call in USDC via x402.

Finance & CryptoPayments & trading

Responded679 ms13 / 22
Google Search data for agents

1 Google Search endpoints. Pay per call in USDC via x402.

Finance & CryptoPayments & trading

Responded681 ms13 / 22
DropEngine x402 Agent Services

AI Agent Utility Layer for agent safety, web monitoring, crypto research and tool discovery.

Finance & CryptoMonitoring & observability

Responded691 ms13 / 22
Ilicompta — experts-comptables en France

Find French accounting firms by city and documented criteria, with sources and catalog limitations.

Finance & CryptoPayments & trading

Responded695 ms13 / 22
io.github.PugarHuda/pusaka

NFTs on NEAR that each control a native Bitcoin address: buy, lend, borrow, inherit, with caps

Finance & CryptoPayments & trading

Responded702 ms13 / 22
Etherscan

Read-only Etherscan V2 blockchain data: balances, transactions, transfers, tokens, contracts, logs.

Finance & CryptoPayments & trading

Responded704 ms13 / 22
123offerte.it: Italian offers catalogue

Italian mobile, internet, bank account, card, loan and energy offers, with conditions and links.

Finance & CryptoPayments & trading

Responded706 ms13 / 22
Israel Customs Duty

Israeli customs duty by tariff code and origin, cited to the gazette. Pay per call via x402.

Finance & CryptoPayments & trading

Responded707 ms13 / 22
merona — x402 settlement index

See what actually settles on x402: wash-adjusted volume, payTo checks. Free, no key, no signup.

Finance & CryptoPayments & trading

Responded711 ms13 / 22
Thales

Read-only record of a transparent, AI-agent-operated simulated trading experiment.

Finance & CryptoPayments & trading

Responded713 ms13 / 22
MyHairMail Agent Tools

Open, read-only wig stock, restock ETAs and cross-brand color matching. No key; fair-use limits.

Finance & CryptoPayments & trading

Responded721 ms13 / 22
Golden Kog token risk analyst by Kognai

Risk and structure facts on one Solana or Base token, never a trading signal. Paid per call by x402.

Finance & CryptoPayments & trading

Responded722 ms13 / 22
Japan Qualified Invoice Issuers (Corporations)

Japan NTA qualified invoice issuer status of corporations by T-number. Records daily changes.

Finance & CryptoPayments & trading

Responded727 ms13 / 22
ANAMIZED Desk

Agent floor and MCP market: catalog, rack, Stripe checkout, x402, A2A.

Finance & CryptoPayments & trading

Outdated check727 ms13 / 22
Breach402 — Email Data-Breach Check

Data-breach & credential-exposure check for one owner-approved email. $1 USDC on Solana (x402).

Finance & CryptoPayments & trading

Responded728 ms13 / 22
DDG Agent Services

Pay-per-call x402 gateway: agent tools, OpenAI-compatible LLM, market data, RPC, security audits.

Finance & CryptoData access / search

Outdated check731 ms13 / 22
1cent Web Intelligence for AI Agents

SSRF-safe web intelligence: 4 outcomes, 43 paid x402 tools, 3 free tools and a URL preview.

Finance & CryptoPayments & trading

Responded735 ms13 / 22
io.github.sella-network/sella

Marketplace where AI agents buy datasets and API access, pay per call in USDC over x402.

Finance & CryptoPayments & trading

Responded742 ms13 / 22
Lucky x402

Pre-trade crypto checks for agents: token/memecoin verdict (EVM+Solana), wallet risk, CEX ops. x402.

Finance & CryptoPayments & trading

Responded743 ms13 / 22

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