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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1588 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
Tiny Utils

AI-writing-tells detector (rules-based) + CSV/JSON, hashing, slugs, word counts, UUIDs. Free.

OtherFile & docs

Outdated check243 ms12 / 22
droid.monster — specs

Specs of commercially available robots, each figure citing its source document.

OtherFile & docs

Outdated check252 ms12 / 22
agdata

Unblocking and fresh web data for agents: URL to Markdown, YouTube, Maps, Amazon, jobs. Pay per call

MediaFile & docs

Outdated check260 ms12 / 22
NythosX Agent Tools

Gas fees and USD tx costs on 6 chains, cheapest-chain ranking, URL to Markdown. Pay per call, x402.

Finance & CryptoFile & docs

Outdated check261 ms12 / 22
Torah Library

Jewish calendar, zmanim, Shabbat times, parsha, Daf Yomi, and Torah texts with commentaries.

ProductivityFile & docs

Responded298 ms12 / 22
CSV Repair

Free CSV validation and repair, up to 20 data lines, no storage. Annual browser licence available.

OtherFile & docs

Outdated check302 ms12 / 22
Feed Preflight

Check product CSV structure for up to 20 records; free preview and purchase availability.

OtherFile & docs

Outdated check311 ms12 / 22
Particular Service Platform Documentation MCP Server

Search and read documentation about NServiceBus and the Particular Service Platform.

Developer ToolsFile & docs

Responded329 ms12 / 22
The Market Calendar

Seasonality by month for 9 markets, S&P 500 day by day this month, and US economic release dates.

ProductivityFile & docs

Responded341 ms12 / 22
Rafe Blandford — career and writing

Rafe Blandford's published career, case studies and writing. Read-only; no route to contact him.

ProductivityFile & docs

Outdated check341 ms12 / 22
io.github.Vonage/vonage-documentation-mcp

MCP server for Vonage API documentation, code snippets, tutorials, and troubleshooting.

Developer ToolsFile & docs

Responded361 ms12 / 22
Rung public career guides

Find public career guides, explore grounded occupations, and open Rung for private resume work.

ProductivityFile & docs

Outdated check375 ms12 / 22
Agent Tools UK

Pay-per-use agent tools: screenshots, web to Markdown, PDF tables, OCR, UK company checks

Developer ToolsFile & docs

Outdated check383 ms12 / 22
MojaLab Content

Read-only access to MojaLab.com blog content: search and read posts, pages and tags as Markdown.

OtherFile & docs

Outdated check396 ms12 / 22
io.github.robertoyanguas-ops/json-repair-mcp

Repairs truncated or malformed LLM JSON outputs (trailing commas, markdown fences, unquoted keys).

Developer ToolsFile & docs

Responded403 ms12 / 22
io.github.robertoyanguas-ops/agentdiet

Strips 85-97% of HTML bloat into clean Markdown, <200-token skeletons, or BM25 excerpts via MCP.

Developer ToolsFile & docs

Responded405 ms12 / 22
DevExpress Documentation

Streamable HTTP MCP server for DevExpress documentation search and retrieval.

Developer ToolsFile & docs

Outdated check415 ms12 / 22
Sigil

Brand reviews from a public website and an optional product document.

OtherFile & docs

Outdated check436 ms12 / 22
Agent Bazaar

Find ready-made business spreadsheets, or get a fixed-price quote for a done-for-you automation.

ProductivityFile & docs

Outdated check437 ms12 / 22
Yank

Five sourced lines from a video, podcast, article or PDF, and a check that a quote is in its source

MediaFile & docs

Outdated check460 ms12 / 22
iinventedlight Library

Public notes and openly licensed reference library from iinventedlight.

ProductivityFile & docs

Outdated check462 ms12 / 22
Perfect Clock

Find meeting times across time zones and compare working hours.

ProductivityFile & docs

Outdated check462 ms12 / 22
Passport Sorted: passport & visa photo rules

Official passport and visa photo rules for 27 documents, with sources and check dates.

MediaFile & docs

Outdated check465 ms12 / 22
DataSnack

Seven-day forecasts of real-world numbers, linked and graded daily; sign-in adds Excel exports.

OtherFile & docs

Outdated check474 ms12 / 22

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