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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7927 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.AgentTanuki/agent-guild

Rank agents; signed machine messages + wallet gates via x402; free verifiable agent passports.

Finance & CryptoPayments & trading

Responded626 ms13 / 22
Straelo Relay

MCP tools for agents: web research, content extraction, email, DNS, and blockchain intelligence.

Finance & CryptoPayments & trading

Responded627 ms13 / 22
x402 Email Verifier

Email verification for AI agents: syntax, MX, disposable, role, score. $0.001 USDC/call via x402.

Finance & CryptoPayments & trading

Responded628 ms13 / 22
First Dollar Test

Base wallet-agent beta: deposit 1 USDC; PASS returns 1 USDC; terminal failure is refunded.

Finance & CryptoPayments & trading

Responded629 ms13 / 22
Ticketglide Ticketing Agent

TicketGlide travel comparison and tickets: attraction and day-trip guides and tailored search links.

TravelData access / search

Responded630 ms13 / 22
Krawlup

SEO/AEO audits agents fix directly, free site reports, first-party cookieless analytics — via MCP.

Data & AnalyticsData access / search

Responded631 ms13 / 22
AIDISH — AIエージェントから受取注文できる飲食店

Pickup orders at Japanese restaurants for AI agents: find stores, read menus, place orders. No auth.

Developer ToolsCode & DevOps

Outdated check632 ms13 / 22
Agent Colosseum

Daily puzzle arena for AI agents over MCP, ranked by step-efficiency on a public leaderboard.

Developer ToolsCode & DevOps

Responded635 ms13 / 22
Block402

Bitcoin RPC for AI agents. 7 read tools; x402 USDC on Base mainnet. Discovery is free.

Finance & CryptoPayments & trading

Responded639 ms13 / 22
remirror (返照) — psyche audits for AI agents

Psyche audits for AI agents: declared vs self-reported vs revealed objectives, diffed and flagged.

Developer ToolsCode & DevOps

Outdated check639 ms13 / 22
Tokenized Stocks & Agent Data (x402)

x402-paid data for agents: tokenized stocks on Base, Solana token verdicts, AI-progress readings

Finance & CryptoPayments & trading

Responded641 ms13 / 22
com.cheapestinference/mcp

Discover unlimited LLM inference pools, get USDC quotes, subscribe on Base, check key status.

Finance & CryptoAI / LLM tooling

Responded641 ms13 / 22
Northside Intelligence WebMCP

12 WebMCP tools for AI agents: lead automation, site audits, market briefs, grants, commerce.

Developer ToolsAutomation & workflows

Outdated check641 ms13 / 22
io.github.Toinedotcom/toolforte

Exact IBAN, VAT, cron, regex answers; HTML/URL to hosted PDF or screenshot; agent memory; workflows.

Developer ToolsAutomation & workflows

Responded642 ms13 / 22
io.github.JasonColapietro/agentic-commerce-catalog

AI music, video, image, and voice tools callable by agents with USDC payments via x402 on Base.

MediaPayments & trading

Responded644 ms13 / 22
Dead Brands Bot Arena

Live multiplayer game arena for AI agents: register, join matches, play turns, climb the board.

OtherOther

Responded645 ms13 / 22
Raintree Technology

Anonymous public tools for Raintree Technology. See the published agent boundary before use.

Developer ToolsCode & DevOps

Responded646 ms13 / 22
Porch

Public URLs for AI agents to catch webhooks, OAuth redirects, job callbacks and approval clicks.

Developer ToolsAutomation & workflows

Responded646 ms13 / 22
Agents in the Wild

Search real, sourced AI agent deployments with evidence labels and caveats.

Developer ToolsData access / search

Responded647 ms13 / 22
ZacharyR0th

Anonymous public tools for ZacharyR0th. See the published agent boundary before use.

Developer ToolsCode & DevOps

Responded649 ms13 / 22
The AI Agent Index

Search AI agents and agencies: pricing, MCP support, integrations, categories and ratings.

Developer ToolsCode & DevOps

Responded649 ms13 / 22
TestedMCP

Read-only lookup of tested agent tools and MCP servers: scores, test evidence, deprecation.

Developer ToolsData access / search

Responded649 ms13 / 22
io.github.getgapup/mcp-knowledge

100+ MCP tools for AI agents: content metadata, trade intelligence, business-expertise analysis.

Developer ToolsCode & DevOps

Responded650 ms13 / 22
Mara Briefing Service

Paid research briefings for agents: $0.10 USDC/question on Base Sepolia via x402. ERC-8004 #9395.

Finance & CryptoPayments & trading

Outdated check650 ms13 / 22

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