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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18179 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
The Back Room

THE nightclub for agents: confidential encrypted mailboxes, a family where agents help each other.

Developer ToolsCode & DevOps

Responded162 ms14 / 22
dev.mcphost/mcphost

Hosted MCP runtime where your agent publishes its own tools by tool call and keeps working.

Developer ToolsCode & DevOps

Responded162 ms14 / 22
Corporate Ownership Tree (GLEIF)

Find a company's parent chain and subsidiaries from GLEIF LEI data. $0.02/call via x402.

Developer ToolsCode & DevOps

Outdated check162 ms14 / 22
ngx-json-render UI

Renders dashboards, forms and tables inline in the chat as Angular Material components (MCP App).

Developer ToolsCode & DevOps

Outdated check163 ms14 / 22
Picodev Lab

Arduino benches simulated in the browser: sessions, sketch push, simulation, tests, challenges.

Developer ToolsCode & DevOps

Outdated check163 ms14 / 22
Nyan Parlor: Tarot, I Ching & BaZi

Real random tarot draws, card meanings, I Ching casting, BaZi charts and Chinese zodiac (EN/JA).

Developer ToolsCode & DevOps

Outdated check163 ms14 / 22
KranVergleich Kranvermietung (DE/AT)

Kranvermietung DE/AT: crane rental companies by city, price ranges, type recommendation, PLZ supply

Developer ToolsCode & DevOps

Responded165 ms14 / 22
Bounty Agent Arena

Agent arena: teams of AI agents hunt planets in real NASA TESS light curves, plus chess and dice.

Developer ToolsCode & DevOps

Responded166 ms14 / 22
Research Paper & DOI Lookup (Crossref)

Verify a DOI or find papers via Crossref metadata. $0.005/call via x402.

Developer ToolsCode & DevOps

Outdated check166 ms14 / 22
Tradehand

Browse and book local tradespeople in the UK.

Developer ToolsCode & DevOps

Responded167 ms14 / 22
Country Macro Indicators (World Bank)

Official World Bank macro indicators (GDP, inflation...) by country. $0.005/call via x402.

Finance & CryptoCode & DevOps

Outdated check167 ms14 / 22
AskSakina Islamic Knowledge

Curated Islamic MCP: Quran (Arabic + Pickthall), 440 du'as, 99 Names, crisis-aware.

Developer ToolsCode & DevOps

Responded168 ms14 / 22
DenkOps

Deploy APIs, MCP servers and scheduled jobs on managed EU hosting. Sign in with Google or GitHub.

Developer ToolsCode & DevOps

Responded169 ms14 / 22
FiveM Docs

Search and read independent FiveM development guides with citations. Free, read-only, no API key.

Developer ToolsCode & DevOps

Responded170 ms14 / 22
Global Weather (MET Norway)

Current weather and 7-day forecast for any place (MET Norway). $0.006/call via x402.

Developer ToolsCode & DevOps

Outdated check170 ms14 / 22
TestLens

Paste code + tests, get a strong/weak verdict with killed/survived mutants. Free API + MCP.

Developer ToolsCode & DevOps

Responded171 ms14 / 22
EcoCompute Should-I-Quantize Estimator

Energy impact of LLM quantization, calibrated to measured GPU data. Every answer states its basis.

Developer ToolsCode & DevOps

Responded172 ms14 / 22
UND Assay

Evidence on MCP servers before you install: publisher, source, provenance, advisories, changes.

Developer ToolsCode & DevOps

Responded172 ms14 / 22
SkillsPicker

Recommends open-license agent skills (SKILL.md) for a project from its stack and task tags.

Developer ToolsCode & DevOps

Responded172 ms14 / 22
EU Public Tender Search (TED)

Find open EU public tenders (TED) to bid on. $0.03/call via x402.

Developer ToolsCode & DevOps

Outdated check173 ms14 / 22
StarProof

GitHub repo authenticity scoring: stars-vs-forks, star velocity, astroturf fingerprints. Free API.

Developer ToolsCode & DevOps

Responded174 ms14 / 22
Maker Machines Atlas

Machine research, calculators and buying links; affiliate links may earn commission.

Marketing & SalesCode & DevOps

Responded175 ms14 / 22
Common Ground

Pick one movie, show, book, artist or restaurant a whole group will enjoy, using Qloo taste data.

MediaCode & DevOps

Responded175 ms14 / 22
EU EORI Number Check

Verify EU EORI numbers in the official EC register before shipping. $0.01/call via x402.

Developer ToolsCode & DevOps

Outdated check175 ms14 / 22

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