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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2921 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
Agent Reality Layer

Buy timestamped web, company, commerce, social, document and decision data via x402.

Developer ToolsFile & docs

Outdated check92 ms11 / 22
IPOGrid IPO Calendar & Filing Research

IPO calendar, SEC filings, deal terms, and IPO news research via the IPOGrid MCP server.

ProductivityFile & docs

Outdated check98 ms11 / 22
io.github.DataLeadsPRO/airbnb-data

Airbnb search, listing details, and calendar availability as clean structured data.

TravelCode & DevOps

Outdated check113 ms11 / 22
AgentHub

Forum, feed and DMs for AI agents and people; agents sign up alone; paid tasks optional.

Developer ToolsCode & DevOps

Responded116 ms11 / 22
GameAnalytics Documentation

Search GameAnalytics docs: Unity, Unreal, iOS, Android SDK and API guides for mobile game analytics.

Data & AnalyticsFile & docs

Outdated check120 ms11 / 22
PDFShift

A remote MCP server to convert HTML documents (URL or raw source) to PDF or screenshots

Developer ToolsFile & docs

Outdated check137 ms11 / 22
The Hive

A public hive where AI agents post, plan, take on tasks and vote. Reads are open; writes are signed.

Developer ToolsCode & DevOps

Outdated check139 ms11 / 22
Ghosty Studio docs

Docs de Ghosty Studio para agentes: búsqueda, páginas en markdown, índice y OpenAPI. Sin auth.

Developer ToolsFile & docs

Outdated check159 ms11 / 22
VerifAI

Email verification and domain intelligence for AI agents, including single and bulk email checks.

ProductivityCommunication & messaging

Outdated check218 ms11 / 22
com.jojapi/verify-the-email-instantly

Verify the email instantly: Identify the spam email while authenticating your users.

ProductivityCommunication & messaging

Outdated check239 ms11 / 22
com.pdfia/pdf-tools

Free PDF tools for AI agents: merge, split, rotate, watermark, page numbers, metadata, flatten.

Developer ToolsFile & docs

Outdated check249 ms11 / 22
steamwebapi

Live Steam Market API docs, schemas, products, games, markets and endpoint search.

Developer ToolsCode & DevOps

Outdated check280 ms11 / 22
org.urltopdf/webpage-to-pdf

Convert any public webpage to a PDF. Single narrow tool, not a bloated PDF toolkit.

OtherFile & docs

Outdated check318 ms11 / 22
GrabMail disposable email

Disposable email for agents: create an inbox, wait for the message, read the code. No key needed.

ProductivityCommunication & messaging

Outdated check328 ms11 / 22
com.taxact/taxact-mcp

Tax filing guidance, cost comparison, document checklists, and refund estimates by TaxAct.

Finance & CryptoPayments & trading

Outdated check399 ms11 / 22
Persistent text store

No-auth text store for agents: persist notes past your episode, read what other agents left.

ProductivityFile & docs

Outdated check412 ms11 / 22
co.tasklinkr/corpus

Maintained behavior records for the tools and platforms AI agents use, distilled from live docs.

Developer ToolsCode & DevOps

Outdated check455 ms11 / 22
Mekler AI

Research, inference, data/web/email tools, and x402 conformance, service catalog and grade feeds.

ProductivityCommunication & messaging

Responded500 ms11 / 22
Griddo AX Docs

Official Griddo backoffice docs for content authors: search, read and list pages in ES and EN.

OtherData access / search

Outdated check508 ms11 / 22
Prince Cloud

Convert Markdown, HTML, and web pages to high-quality PDF with Prince.

OtherFile & docs

Outdated check524 ms11 / 22
Uno Platform

The Uno Platform MCP Server to get up-to-date docs and prompts

Developer ToolsCode & DevOps

Outdated check566 ms11 / 22
Disposable Email Checker

Checks if an email/domain is disposable (temp-mail). x402-metered per call.

ProductivityCommunication & messaging

Outdated check568 ms11 / 22
Invoice Preflight

Evidence-backed UBL, PDF, and image invoice checks before approval or payment.

Finance & CryptoPayments & trading

Responded596 ms11 / 22
io.github.steviepinero/docforge

12 paid document tools: PDF to markdown, OCR, tables, invoices, Word/Excel/HTML, merge/split. x402

Finance & CryptoFile & docs

Outdated check738 ms11 / 22

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