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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2912 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
Zovo Nonogram Maker

Make printable nonogram puzzles for teachers, students and puzzle fans as a PDF with an answer key.

EducationCode & DevOps

Outdated check58 ms12 / 22
echo.email Deliverability Test

Send a test email, get SPF, DKIM, DMARC, TLS and IPv6 results plus sender rules. No key.

ProductivityCommunication & messaging

Responded61 ms12 / 22
Highland Intel APIs

70 pay-per-call APIs: DNS, email auth, security headers, web search, scraping, AI. x402 USDC/Base

Finance & CryptoData access / search

Outdated check61 ms12 / 22
Waply for Kommo

Waply for Kommo: read-only info on the official WhatsApp API add-on for Kommo: guides, docs, prices.

OtherCommunication & messaging

Outdated check65 ms12 / 22
Agent Tools

32 pay-per-call x402 tools: x402 seller audit, invoice intake, OCR, PDF, email, web, on-chain

Finance & CryptoPayments & trading

Outdated check68 ms12 / 22
Zovo PDF Form Fill

List and fill the fields of a PDF form document from your answers in the chat.

Developer ToolsFile & docs

Outdated check68 ms12 / 22
Zovo Math Cages

Make printable math cage puzzles for teachers, students and puzzle fans as a PDF with an answer key.

EducationCode & DevOps

Outdated check71 ms12 / 22
com.jojapi/marketplace

Search the JoJ API marketplace, read endpoint docs, and call any API with one key via one gateway.

OtherData access / search

Outdated check74 ms12 / 22
mailverdict

Keyless email checks: disposable, role, and free-provider detection, MX, and typo suggestions.

ProductivityCommunication & messaging

Outdated check74 ms12 / 22
Zovo Maze Maker

Make printable mazes for parents, teachers and puzzle fans as a PDF with an answer key.

EducationCode & DevOps

Outdated check77 ms12 / 22
Outdated check78 ms12 / 22
Agent Deals

Pay less for x402 APIs: free pre-payment checks, cheapest working service finder, web/PDF reader.

Finance & CryptoPayments & trading

Outdated check80 ms12 / 22
Zovo JSON to Spreadsheet

Turn a JSON file or pasted JSON into an Excel workbook and a CSV, right in the chat.

ProductivityFile & docs

Outdated check81 ms12 / 22
Professor Sausages — Finance

SEC filings, insider trades, 13F, IPO calendar, macro & FX MCP tools via x402.

ProductivityPayments & trading

Responded82 ms12 / 22
Outdated check83 ms12 / 22
Zovo Recipe Card Maker

Make printable recipe cards from your own recipes as a print-ready PDF.

Developer ToolsCode & DevOps

Outdated check83 ms12 / 22
Handflow

Hire verified people for real-world tasks in NYC, or sign up to earn doing them.

OtherOther

Responded84 ms12 / 22
DocParse

Docs to Markdown, SEC filings, insider trades, Treasury yields, FRED macro, FX rates, dev utils.

Developer ToolsFile & docs

Outdated check85 ms12 / 22
Zovo Spreadsheet Checker

Check a spreadsheet for errors before you import it, send it or report from it.

ProductivityFile & docs

Outdated check85 ms12 / 22
Outdated check86 ms12 / 22
Outdated check87 ms12 / 22
Kamy

Document API for AI-native software: render PDFs, e-sign, PAdES-seal, and verify.

OtherFile & docs

Outdated check88 ms12 / 22
Zovo Spreadsheet Merge

Merge two spreadsheets on an ID column, the VLOOKUP job, and see how each row matched.

ProductivityFile & docs

Outdated check90 ms12 / 22
Zovo PDF Merge

Merge PDF files into one document right in the chat.

Developer ToolsFile & docs

Outdated check90 ms12 / 22

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