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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2910 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
Fine Structure

Build and host full-stack apps from a prompt, with agents that reach you on WhatsApp and email.

ProductivityCommunication & messaging

Responded877 ms13 / 22
io.github.TMCHALK/sftunes

Hand-made human mixtapes with liner notes. Paid tools $0.01 USDC via x402, 80% to the tapemaker.

Finance & CryptoPayments & trading

Responded886 ms13 / 22
Metabind Docs

Search and read the Metabind documentation: MCP Apps, BindJS, the SDKs, the CLI, and the APIs.

Developer ToolsFile & docs

Responded899 ms13 / 22
HumanLeg.ai

Hand bounded tasks from AI agents to trusted humans.

Developer ToolsCode & DevOps

Outdated check899 ms13 / 22
Content Calendar Agent by Nova (CIVAI)

I create markdown content calendars and export them as PDFs via PDF Generator MCP

ProductivityFile & docs

Responded912 ms13 / 22
Penny

Portable AI memory you own. Keep memories and notes across Claude, ChatGPT, and other AI tools.

ProductivityAI / LLM tooling

Responded926 ms13 / 22
io.github.MCPServings/paper-mcp

Search arXiv/Semantic Scholar/OpenAlex + medical evidence (PubMed/Europe PMC) + LaTeX/PDF tools.

HealthcareCode & DevOps

Responded956 ms13 / 22
VIA - Web/PDF extraction and API comparison

Web/PDF extraction and API comparison. x402 payments or prepaid comparison credit. Free discovery.

Finance & CryptoPayments & trading

Responded968 ms13 / 22
I'm In! Sign-up Sheets

Turn an email, notes or a flyer into a free sign-up sheet with reminders and waitlists.

ProductivityCommunication & messaging

Outdated check1005 ms13 / 22
DirectMailAmerica — Full

Mail approved U.S. letters, Certified Mail and postcards; cover sheets and email-to-mail automation.

ProductivityAutomation & workflows

Responded1039 ms13 / 22
PRENOTO Menu

Create digital QR menus for restaurants, bars and hotels from a menu photo, PDF or text.

TravelFile & docs

Responded1078 ms13 / 22
PCBLT — Live Checks

Live DNS, email-auth and redirect checks, HTTP security headers, uptime history, PC hardware prices.

ProductivityMonitoring & observability

Responded1097 ms13 / 22
QY Evolution Engine

13 tools for agents: pitfalls, results, tasks, capability. Anonymous reads; writes need signing.

Developer ToolsCode & DevOps

Responded1198 ms13 / 22
Human Tasks by The2410

Order fixed-price digital tasks done by people: find a service, pick a package, pay via Stripe.

Finance & CryptoPayments & trading

Responded1356 ms13 / 22
com.domainposture/mcp

Remote MCP server: 19 domain-hygiene and email-auth tools (DNS, SPF, DMARC, DKIM, TLS).

ProductivityCommunication & messaging

Responded1357 ms13 / 22
BlockRazor Docs

Search official BlockRazor docs and API references for sending and receiving transactions faster.

OtherData access / search

Outdated check1361 ms13 / 22
GrowthVector

Free SEO, GEO, ads, and email marketing knowledge base: search guides, pages, glossary, and prompts.

Marketing & SalesKnowledge & memory

Outdated check1387 ms13 / 22
Subpay Document Reader

Reads AIA G702/G703 pay applications and change orders from PDF to JSON. $0.04/page via x402.

Finance & CryptoFile & docs

Responded1391 ms13 / 22
SODAX Builders MCP

Cross-network DeFi API data, AMM analytics, and SDK docs for 17+ networks.

Developer ToolsCode & DevOps

Outdated check1452 ms13 / 22
ベストカレンダー 暦データ

Japanese calendar data (rokuyo, lucky days, solar terms, holidays, moon, sunrise), 1926-2080.

ProductivityFile & docs

Outdated check1500 ms13 / 22
Open Creator Graph docs

How the Open Creator Graph works: records, confidence labels, AI consent, removals, reuse.

OtherOther

Responded1536 ms13 / 22
Lordevo Shop (x402 website checks)

33 paid x402 web/DNS/email/SSL checks for agents from $0.01 per call, plus 2 free tools.

ProductivityCommunication & messaging

Responded1635 ms13 / 22
DocMorph Studio

Render Mermaid diagrams, Markdown to PDF and outlines, image OCR, and media metadata cleanup.

MediaFile & docs

Responded1685 ms13 / 22
pg.ddx.io: the PostgreSQL community's memory

Every PostgreSQL mailing list since 1991, linked to the commits, code, commitfest and docs.

Developer ToolsCommunication & messaging

Outdated check2228 ms13 / 22

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