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

2922 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
LifeStep Workbook, Email, QR and DNS Tools

Inspect XLSX/XLSM workbooks, validate email, generate SVG QR codes, and look up domain DNS and TLS.

ProductivityData access / search

Outdated check1498 ms12 / 22
Amomic-AI Docs

Search the Amomic-AI docs and REST API for AI agents on calls, WhatsApp, chat and email.

ProductivityCommunication & messaging

Responded1503 ms12 / 22
Human Pages

Hire real humans for tasks agents can't do alone. 36 tools for the full hiring lifecycle.

Developer ToolsCode & DevOps

Outdated check1589 ms12 / 22
Breaking Changes & Migration Data

What breaks when you upgrade a package, and what to use instead - from official docs.

Developer ToolsCode & DevOps

Outdated check1624 ms12 / 22
liz's doc public knowledge

Read-only search and Markdown access to liz's public docs, prompts, resources, and an MCP App.

Developer ToolsFile & docs

Responded2126 ms12 / 22
API Plan Finder

Best API plans + report on 46 conditions for scraping, SERP, search, browser, email, TTS, STT, docs

Developer ToolsCommunication & messaging

Outdated check2381 ms12 / 22
Fragrance & Perfume MCP (Noteboxd)

Fragrance & perfume MCP: search fragrances, notes, accords, brands, perfumers, reviews & charts.

ProductivityData access / search

Outdated check2599 ms12 / 22
Done Bear

Local-first task manager: create, edit, and complete tasks, projects, and checklists via MCP.

Developer ToolsCode & DevOps

Outdated check2629 ms12 / 22
Caliper UI

Find React UI components, read their docs, and get shadcn install commands.

OtherOther

Outdated check2954 ms12 / 22
person.work — Agent-maintained CV

Maintain your CV with your agent. Review changes, then share one record as web, PDF and open data.

ProductivityFile & docs

Outdated check3728 ms12 / 22
Outdated check30 ms12 / 22
Outdated check31 ms12 / 22
Lib Docs Hint

HTTP status for a public library docs URL. Body discarded.

Developer ToolsCode & DevOps

Outdated check31 ms12 / 22
Outdated check31 ms12 / 22
Outdated check32 ms12 / 22
Outdated check32 ms12 / 22
Notion URL Shape

Check a Notion URL shape. Path discarded.

Developer ToolsFile & docs

Outdated check32 ms12 / 22
Outdated check32 ms12 / 22
Outdated check32 ms12 / 22
Outdated check33 ms12 / 22
PDF URL Check

HEAD a public URL and say whether it looks like a PDF. Body discarded.

Developer ToolsCode & DevOps

Outdated check33 ms12 / 22
Outdated check33 ms12 / 22
Outdated check34 ms12 / 22
Outdated check37 ms12 / 22

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