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

18175 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
Akashi Notari

Proof of existence for files: anchor a SHA-256 hash on Base, look up proofs. Paid with x402.

Developer ToolsData access / search

Responded74 ms15 / 22
Unlock Pulse

Token unlock calendar for the next 60 days, rated by size vs circulating supply. Free, no key.

Developer ToolsCode & DevOps

Responded74 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

Responded75 ms15 / 22
TbmLib — Tenor & F-Attachment Trombone Slide Position & Overtones Engine

Look up Tenor & F-attachment trombone slide positions (1st-7th), F-trigger & pitch adjustments.

Developer ToolsData access / search

Responded75 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

Responded76 ms15 / 22
LeadShield Contact Form & B2B Solicitation Blocker

Preview form screening and manage site rules. Built by Moosh Works (https://mooshworks.com).

Developer ToolsCode & DevOps

Responded76 ms15 / 22
Socketlist

Search a directory of 800+ open-source MCP servers: find, compare and get install configs.

Developer ToolsCode & DevOps

Responded77 ms15 / 22
TanStarter Docs

Search published TanStarter documentation. Read-only and public.

Developer ToolsFile & docs

Responded78 ms15 / 22
gettargetmarket: the Target Market door

Target market statements by ISIN: filed by the manufacturer, signed, receipted (AIO-10060 v1.2).

Developer ToolsCode & DevOps

Responded78 ms15 / 22
Transica

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

Developer ToolsCode & DevOps

Responded78 ms15 / 22
Hlido Agent Reviews

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

Developer ToolsCode & DevOps

Responded79 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

Responded80 ms15 / 22
Termcard

Create terminal business cards (npx <name>) in a chat, or look up anyone's card.

Developer ToolsData access / search

Responded80 ms15 / 22
Echo UI

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

Developer ToolsCode & DevOps

Responded80 ms15 / 22
OpenCidian: open Chinese ↔ Vietnamese dictionary (Hán Việt, pinyin, character breakdown)

Open Chinese-Vietnamese dictionary by Perxel: Hán Việt, pinyin, meanings, characters. Cited.

Developer ToolsCode & DevOps

Responded81 ms15 / 22
NanoParse

Clean Markdown from any URL with Litmus trust signals. $0.005 per page via x402, no account.

Developer ToolsFile & docs

Responded81 ms15 / 22
Oh My Share

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

Developer ToolsCode & DevOps

Responded81 ms15 / 22
Bhasini Indic Languages

Indic MCP: transliterate into all 22 Indian languages, convert scripts, keymaps. Hosted or local.

Developer ToolsCode & DevOps

Responded82 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

Responded82 ms15 / 22
TidyData Tools

Holidays, business days, currency, time zones, DNS/WHOIS, web page checks, geodata and text tools.

Developer ToolsCode & DevOps

Responded83 ms15 / 22
FreshContext

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

Developer ToolsCode & DevOps

Responded83 ms15 / 22
Model Tested

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

Developer ToolsAI / LLM tooling

Responded83 ms15 / 22
getfilings: the Filings door

The disclosures of an issuer in a date range, from the record: signed and receipted (RCO-10060).

Developer ToolsCode & DevOps

Responded84 ms15 / 22

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