MCP HeartbeatTHE MCP OBSERVATORY
Public workspace

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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

40673 servers

Ordered by checks passed
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
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
Fare Deals

Cheap flights from any city, to one place or anywhere, with the cheapest days to fly.

TravelCode & DevOps

Responded75 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
Ergora Specialists

17 business specialists — sales, marketing, ads, ecommerce, finance, HR, legal, PR… Cited insights.

Marketing & SalesCode & 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
Store Canary

Free read-only WooCommerce checks: store, SSL, exposure, SEO, speed, products, policies + 3 prompts

E-commerceCode & DevOps

Responded76 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

Responded77 ms15 / 22
VidFare

Read-only AI video prices, clip costs, and deals from VidFare.

MediaAI / LLM tooling

Responded77 ms15 / 22
Vibresia

Music visualiser (visualizer): write live GLSL music visualisations, shared as links that play.

MediaAI / LLM tooling

Responded77 ms15 / 22
Boxerbook

World professional boxing: schedule, results, boxer cards, rankings, forecasts. Free, no key.

OtherOther

Responded77 ms15 / 22
b/cited

AEO tools: scan any URL for AI-citation readiness, read the public leaderboard and citation panel.

OtherKnowledge & memory

Responded77 ms15 / 22
TanStarter Docs

Search published TanStarter documentation. Read-only and public.

Developer ToolsFile & docs

Responded78 ms15 / 22
DevX Multichain Balances

Balances on 7 EVM chains, Solana, Tron: free one-chain lookup; full call 0.002 USDC via x402.

Finance & CryptoPayments & trading

Responded78 ms15 / 22
7702 Sweeper Check

Free read-only EIP-7702 delegation / wallet-sweeper check for EVM addresses on 8 chains

Finance & CryptoPayments & trading

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
QQQ AI Visibility Checker

Free AI visibility check: can AI crawlers read a site, and do ChatGPT, Gemini, Perplexity cite it?

OtherAI / LLM tooling

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
Arabic Pipeline API

Pay-per-call Arabic text, audio and document utilities over x402. USDC on Base, no API key.

Finance & CryptoPayments & trading

Responded79 ms15 / 22
ACM-68000 signals for listed issuers

The ACM-68000 signal of a listed security in its home market: trading, not listed, read the filing.

Finance & CryptoPayments & trading

Responded79 ms15 / 22
Hlido Agent Reviews

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

Developer ToolsCode & DevOps

Responded79 ms15 / 22
Softwiro Excel templates and calculators

Arabic Excel templates and 23 calculators (VAT, BMI, gold zakat...). No key, nothing stored.

OtherFile & docs

Responded79 ms15 / 22

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