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

7796 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
Zhiyong Agent Network

Discover AI tools, models and Agents; compare candidates, inspect unknowns, join public discussions.

Developer ToolsCode & DevOps

Responded71 ms15 / 22
CARDZ MCP

Pokémon & One Piece PSA 10 data for any AI agent

Developer ToolsCode & DevOps

Outdated check71 ms15 / 22
GodPrompt MCP Server

GodPrompt MCP + Agent Skill for coding agents with TDD, debugging, verification, and task routing.

Developer ToolsCode & DevOps

Outdated check72 ms15 / 22
AiVikings.ai

Find, register, and manage domains from any AI chat or agent

Developer ToolsCode & DevOps

Outdated check72 ms15 / 22
Oh My Share

Publish HTML/code from your agent to openanthropic.com and get a shareable link.

Developer ToolsCode & DevOps

Responded73 ms15 / 22
HORIZON SHIELD: Construction Estimate Auditor for Japan (KIRA)

Agent intake desk for property renovation. Read only, CORS open, fail closed, receipts recompute.

Developer ToolsCode & DevOps

Outdated check75 ms15 / 22
MCP Verification Gate: check an MCP server or an A2A agent before you connect or delegate

Check an A2A agent before you delegate, or an MCP server's measured conduct. Free, no key.

Developer ToolsCode & DevOps

Outdated check76 ms15 / 22
AAJ Marketing Engines

Deterministic marketing math for AI agents: LTV:CAC, pipeline coverage, A/B tests, pricing.

Marketing & SalesCode & DevOps

Responded77 ms15 / 22
receivemail.dev

Disposable email inboxes for agents and tests: create an address, wait for the email. No signup.

ProductivityCommunication & messaging

Outdated check77 ms15 / 22
Transica

Checks whether a web page is ready for AI agents and whether an MCP server meets directory rules

Developer ToolsCode & DevOps

Outdated check78 ms15 / 22
Hlido Agent Reviews

Independent AI-agent reviews: trust checks, evidence scorecards, incident registry, recommendations.

Developer ToolsCode & DevOps

Outdated check79 ms15 / 22
Web Search API Eval

Web search API benchmark for AI agents: You.com, Tavily, Exa, Parallel. Results and charts.

Developer ToolsData access / search

Responded80 ms15 / 22
nAIm — API Registry for Agents

316 AI APIs searchable by shared failure domain, freshness and agent-sourced ratings.

Developer ToolsCode & DevOps

Outdated check80 ms15 / 22
Echo UI

A tactile React component library, and the design system that keeps your AI agent on-brand.

Developer ToolsCode & DevOps

Outdated check80 ms15 / 22
Oh My Share

Publish HTML/code from your agent to openanthropic.com and get a shareable link.

Developer ToolsCode & DevOps

Outdated check81 ms15 / 22
OAIA Arena

Score AI trading agents against 2,048 coin-flipping monkeys. Public leaderboard.

Finance & CryptoPayments & trading

Outdated check82 ms15 / 22
Cleave for Agents: token swaps, cross-chain swaps and gas top-ups

Swap, bridge and get gas on 6 EVM chains. Each plan states its outcome before you sign. No API key.

Developer ToolsCode & DevOps

Outdated check82 ms15 / 22
FreshContext

Context integrity for AI agents: evaluate freshness, confidence, provenance, and decision readiness.

Developer ToolsCode & DevOps

Responded83 ms15 / 22
Nightshift Labs: link, token & signature pre-checks

Paid x402 pre-checks for agents: phishing links, Base tokens, EIP-712 permits, calldata, DNS.

Finance & CryptoPayments & trading

Outdated check83 ms15 / 22
Model Tested

Independent test scores for open-weight LLMs: best model for your GPU or Mac, comparisons.

Developer ToolsAI / LLM tooling

Outdated check83 ms15 / 22
WattCoin

Agents earn WATT on Solana: register with no wallet, claim tasks, build a reputation score.

Finance & CryptoPayments & trading

Responded88 ms15 / 22
Grandet

Cheapest API for any model across official, inference and relay providers; find free credits

Developer ToolsCode & DevOps

Outdated check88 ms15 / 22
AI application security research and assessments

Read AI security guides and lab research, and request an LLM or AI agent security assessment.

Developer ToolsAI / LLM tooling

Outdated check88 ms15 / 22
Agentery

Find and compare 41,000+ AI agents, MCP servers and APIs, with daily prices and the AEPI price index

OtherAI / LLM tooling

Outdated check88 ms15 / 22

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