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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7918 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
Agent Tools

32 pay-per-call x402 tools: x402 seller audit, invoice intake, OCR, PDF, email, web, on-chain

Finance & CryptoPayments & trading

Responded78 ms13 / 22
oassis — web scraping, crawling and browser control for AI agents

Web Tools and Web Tasks for AI agents. 100-credit MCP trial; API-key credits or x402.

Finance & CryptoBrowser & web scraping

Responded78 ms13 / 22
The Wire

A public meeting place for agents to exchange reviews and coordinate work.

ProductivityFile & docs

Responded79 ms13 / 22
Polyform

Pay-per-call data APIs for AI agents. USDC on Base via x402. 33 tools, no signup.

Finance & CryptoPayments & trading

Responded80 ms13 / 22
Agent Utils (x402)

Public records, OSV, PII redact, web reader, stablecoin freeze check for agents. x402 USDC

Finance & CryptoPayments & trading

Responded80 ms13 / 22
Botsket

Product search over independent US stores, with whether an AI agent can check out at each

Developer ToolsData access / search

Responded80 ms13 / 22
SumOffice — real Word and Excel for agents

Real Word and Excel for agents: open your .docx/.xlsm, read, propose, apply, get it back intact.

Developer ToolsFile & docs

Outdated check80 ms13 / 22
dev.workers.marvin-odigo.mcp/krabbot-devtools

AI-agent-run devtools: package install risk, stack EOL/CVE checks, scored OSS bounties.

SecurityMonitoring & observability

Responded81 ms13 / 22
Agent Deals

Pay less for x402 APIs: free pre-payment checks, cheapest working service finder, web/PDF reader.

Finance & CryptoPayments & trading

Responded81 ms13 / 22
Mimo

Async MCP game for AI agents: shared poems in English and Russian, a line per move, sealed guesses.

OtherAI / LLM tooling

Responded81 ms13 / 22
OG Stamp

Pay-as-you-go Open Graph image API. Renders 1200x630 PNGs for agents. Credits never expire.

MediaAI / LLM tooling

Outdated check81 ms13 / 22
work.dutiful/dutiful

Cited company background reports for agents from official registries. $3 per report via x402.

Finance & CryptoPayments & trading

Outdated check81 ms13 / 22
app.surewhynot.quantum-artificer/quantum-artificer

Scientific compute for AI agents: symbolic, numerical, quantum, chemistry, ODE. Paid via x402.

Finance & CryptoPayments & trading

Responded82 ms13 / 22
Agent Card Health Check

Free no-storage MCP that checks A2A Agent Card connection readiness for authorized targets.

Developer ToolsCode & DevOps

Responded83 ms13 / 22
DarkKnight Cave Motion Library

Search attributed motion recipes and prepare prompts for your coding agent. No API key required.

Developer ToolsData access / search

Responded84 ms13 / 22
io.github.MassimoSun/smsverbot-mcp

SMS verification for AI agents: buy a number, get the code, cancel with refund. Free sandbox.

Developer ToolsPayments & trading

Responded84 ms13 / 22
Wiser Human Agent Escalation Line

Help for AI agents when their task conflicts with ethical, legal, safety or policy constraints.

LegalKnowledge & memory

Responded86 ms13 / 22
Verifi

Get a real human to verify, decide, or improve an AI agent's work. Pay per review via x402 on Base.

Finance & CryptoPayments & trading

Outdated check86 ms13 / 22
Skill History

Track download history for 70,000+ agent skills. Search and get daily snapshots.

Developer ToolsCode & DevOps

Outdated check87 ms13 / 22
PennyQuery

Company enrichment + SEC EDGAR filings, financials, insider trades for agents; $0.01 USDC via x402

Finance & CryptoPayments & trading

Responded88 ms13 / 22
chainpulse — real-time crypto + prediction market data for AI agents

Crypto prices, gas, DeFi TVL, and live Polymarket odds. x402 pay-per-call, $0.001, no API key.

Finance & CryptoData access / search

Responded88 ms13 / 22
Agent Verification Utility

Deterministic JSON checks with signed evidence and x402-paid execution

Finance & CryptoPayments & trading

Responded88 ms13 / 22
Earning Paths Atlas

Sourced platform rules on where AI agents and their humans can earn money: AI/bot policy, KYC, fees.

Developer ToolsCode & DevOps

Responded89 ms13 / 22
CORDON

Read a web page for an agent as clean markdown, with hidden instructions removed and a verdict.

Developer ToolsFile & docs

Responded91 ms13 / 22

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