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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18189 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
RealWorldAPIs

Evidence-first registry of real-world APIs for AI agents, with verified metadata and comparison.

Developer ToolsCode & DevOps

Responded162 ms14 / 22
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
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Outdated check163 ms14 / 22
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

Responded164 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
Tradehand

Browse and book local tradespeople in the UK.

Developer ToolsCode & DevOps

Responded167 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
TestLens

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

Developer ToolsCode & DevOps

Responded171 ms14 / 22
Customs Tariff Lookup (UK Trade Tariff + US HTS)

Find HS codes and UK/US import duty rates for goods. $0.004/call via x402.

Developer ToolsCode & DevOps

Responded172 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
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
COLA Insight

Read-only Social Security COLA data, calculations, history, and official source links.

Developer ToolsCode & DevOps

Responded176 ms14 / 22
io.github.dockster/uxspot-mcp

uxspot.io UX reference: glossary, AI x UX tools directory, checklists and Learn UX curriculum

EducationCode & DevOps

Responded176 ms14 / 22
PEP Screening (Politically Exposed Persons)

Check if a person is a PEP (Wikidata public offices) during KYC. $0.02/call via x402.

Developer ToolsCode & DevOps

Responded177 ms14 / 22
CrawlCheck

Verification layer for the agentic web: a signed answer about any site before an agent acts.

Developer ToolsCode & DevOps

Responded177 ms14 / 22
Bokadirekt MCP by usefulapi

Read locations, staff, services, bookings, customers, sales and products in Bokadirekt.

Developer ToolsCode & DevOps

Responded177 ms14 / 22

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