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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5038 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
GrantCue

Search public US grants and foundation profiles from IRS filings. Read-only, no sign-in.

OtherData access / search

Responded852 ms14 / 22
IbiPoint eSIM Catalog

Search prepaid travel eSIM data plans for 200+ countries with live prices and a buy link.

TravelData access / search

Responded854 ms14 / 22
Sabag 3D Studio

3D printing studio in Israel: services, past projects, products, FAQ, search and quote requests.

OtherData access / search

Responded858 ms14 / 22
Work Insiders

Search 1,000+ recruiting, HR and sales tools: prices, MCP servers, alternatives, ATS links.

OtherData access / search

Responded864 ms14 / 22
io.github.cyanheads/stackexchange-mcp-server

Search Stack Exchange questions, fetch Q&A threads as markdown, look up tag FAQs and user profiles.

Developer ToolsData access / search

Outdated check867 ms14 / 22
IndiaRestros

5 lakh+ Indian restaurants: menus with prices, timings, phones and dish search. Free, no API key.

OtherData access / search

Outdated check868 ms14 / 22
io.github.cyanheads/wikidata-mcp-server

Search and fetch Wikidata entities, execute SPARQL queries, and resolve external identifiers.

Developer ToolsCode & DevOps

Outdated check871 ms14 / 22
io.github.cyanheads/cdc-health-mcp-server

Search and query CDC public health data — mortality, vaccinations, surveillance, behavioral risk.

Developer ToolsCode & DevOps

Outdated check871 ms14 / 22
io.github.cyanheads/wikipedia-mcp-server

Search and read Wikipedia articles and sections, list cited references, nearby pages, and languages.

Developer ToolsCode & DevOps

Outdated check874 ms14 / 22
io.github.cyanheads/arxiv-mcp-server

Search arXiv, fetch paper metadata, and read full-text content.

Developer ToolsCode & DevOps

Outdated check877 ms14 / 22
Pechincha.ai

Brazilian deals: search active promos, coupons and price history from Brazilian online stores.

OtherData access / search

Responded879 ms14 / 22
Liquid Composer

Check Liquid Glass app icon recipes and open them in the browser editor.

Developer ToolsCode & DevOps

Outdated check879 ms14 / 22
io.github.cyanheads/hn-mcp-server

Browse Hacker News feeds, threads, and user profiles with full-text search.

Developer ToolsCode & DevOps

Outdated check880 ms14 / 22
Diver Atlas

Read-only dive-site atlas: search sites, sourced site plates, conditions, suitability checks.

OtherData access / search

Outdated check887 ms14 / 22
io.github.cyanheads/oecd-mcp-server

Search and query 1,500+ OECD statistical datasets via SDMX. Keyless.

Developer ToolsCode & DevOps

Outdated check887 ms14 / 22
io.github.cyanheads/cyanheads-mcp-server

Fleet discovery for the cyanheads MCP ecosystem — semantic search + install snippets.

Developer ToolsCode & DevOps

Outdated check887 ms14 / 22
RentReboot Apartment Search

NYC rent data and guides; OAuth tools for apartment alerts, saved searches and lottery status.

Developer ToolsCode & DevOps

Outdated check889 ms14 / 22
io.github.cyanheads/met-museum-mcp-server

Search the Met collection, browse by department or update date, fetch full records and CC0 images.

MediaCode & DevOps

Outdated check890 ms14 / 22
io.github.cyanheads/internet-archive-mcp-server

Search the Wayback Machine and IA library (40M+ items), fetch snapshots, item metadata, and text.

Developer ToolsCode & DevOps

Outdated check891 ms14 / 22
Jacob Campbell — Florida Real Estate (The Keyes Company)

Read-only server for jacobcampbellrealtor.com: licensee, service area, referrals, site search.

Real Estate & PropertyData access / search

Responded903 ms14 / 22
io.github.cyanheads/earthquake-mcp-server

Search USGS and EMSC seismic data — real-time feeds, event queries, and earthquake counts.

Developer ToolsCode & DevOps

Outdated check903 ms14 / 22
io.github.cyanheads/uk-legislation-mcp-server

Search and read UK legislation at any date, resolve citations, list amendments, track changes.

LegalCode & DevOps

Outdated check904 ms14 / 22
io.github.cyanheads/oeis-mcp-server

Identify integer sequences by terms, search the OEIS, read formulas, programs, b-files, cross-refs.

Developer ToolsCode & DevOps

Outdated check906 ms14 / 22
io.github.cyanheads/libofcongress-mcp-server

Search LOC digital collections, Chronicling America newspapers (full OCR), and LC Subject Headings.

Developer ToolsCode & DevOps

Outdated check908 ms14 / 22

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