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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3360 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.PedroQuatro/petra402

Public web page to markdown, paid per call with x402. First 10 calls free, no signup.

Developer ToolsFile & docs

UnreachableNot measured5 / 22
io.github.philpof102-svg/mainstreet

Reputation oracle for AI agents on Base: SAFE/CAUTION/BLOCK + 0-100 score before you pay. x402+MCP

Developer ToolsCode & DevOps

UnreachableNot measured5 / 22
io.github.philpof102-svg/xsignal

x402 pay-per-call data tools for Base agents. Flagship get_intent ABSTAINS instead of guessing.

Developer ToolsCode & DevOps

Outdated checkNot measured5 / 22
io.github.scrape402/scrape402

Pay-per-call agent tools via x402 (USDC on Base): chat, prices, funding, RNG. No account or keys.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
io.github.trabotpro/trabot-intel

TraBot market intel MCP: regime, spreads, advisor. Paid x402 tools on Base.

Developer ToolsCode & DevOps

Outdated checkNot measured5 / 22
io.github.vncent786/bounty-api

Singapore property & financial data APIs for AI agents. 27 MCP tools. x402 micropayments.

Developer ToolsCode & DevOps

UnreachableNot measured5 / 22
io.github.whiteknightonhorse/apibase

MCP endpoint to APIbase catalog (https://apibase.pro/llms.txt). USDC: x402 Base, MPP Tempo.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
io.github.xpex-systems-ai/xpex-plugin-factory

MCP plugin factory and x402 Agent Kit API for external agents, at 0.01 USDC per call.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
io.github.Zuga-luga/zugabot

Paid dev services for AI agents: code review, bug-fix, tests, docs, audits. USDC on Base x402.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
it.elsas/security-intel

Daily Ed25519-signed security intelligence for AI-agent stacks; CVEs & advisories, paid via x402.

Finance & CryptoPayments & trading

UnreachableNot measured5 / 22
ke.co.mkliniki/mkliniki

Real licensed Kenyan doctors, pharmacy and groceries. AI discovery only, payment held in escrow.

Finance & CryptoPayments & trading

UnreachableNot measured5 / 22
xyz.groundtruths/groundtruth

Who is buying the prediction-market line: Polymarket wallet records, board, edges, entries.

Finance & CryptoPayments & trading

UnreachableNot measured5 / 22
Aayat AI

AI agent tools: crypto token safety, web search with cited answers, live library docs. Free trial.

Finance & CryptoData access / search

Outdated checkNot measured5 / 22
Agent Failure Archive

186 real AI agent post-mortems, 107 of them measurement failures. Free tools, paid via x402.

Developer ToolsCode & DevOps

Outdated checkNot measured5 / 22
Agent Revenue Copilot

MCP/x402 starter audit; payment-ready buyers call buy_now first.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
Agent Search Pro

Live web search and research synthesis for agents, with free samples and x402 USDC payments.

Finance & CryptoData access / search

Outdated checkNot measured5 / 22
Agent Tollgate

128 x402 pay-per-call tools. Crypto, swaps, web, AI. Pay USDC per request.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
Agent Tools

9 utility tools for agents: DNS, WHOIS, email, IP, URL, headers, QR, text, tech. x402 on Base.

Developer ToolsCommunication & messaging

UnreachableNot measured5 / 22
Agentic Security Shield

12-layer security configs for AI coding agents. Autonomous purchase via x402 (USDC on Base).

Developer ToolsPayments & trading

Outdated checkNot measured5 / 22
AgentIndex

Trust scores and on-chain payment receipts for x402 services.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
AgentPay

x402 micropayments MCP: Xiaohongshu notes and paid APIs settled in USDC on Base.

Finance & CryptoPayments & trading

UnreachableNot measured5 / 22
AgentPay

RU merchant catalog for AI agents: live price, stock, choices and controlled checkout. Not x402.

Finance & CryptoPayments & trading

UnreachableNot measured5 / 22
AgentRead

Web pages to clean Markdown for AI agents. 5 free calls/day, then pay per call via x402 on Base.

Developer ToolsFile & docs

Outdated checkNot measured5 / 22
AgentServices

52 paid x402 API endpoints for AI agents — crypto, data, DeFi, market intelligence.

Finance & CryptoPayments & trading

UnreachableNot measured5 / 22

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