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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18199 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
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
Good Grants MCP by usefulapi

Read applications, rounds, funds and leaderboards; tag applications in Good Grants.

Developer ToolsCode & DevOps

Responded177 ms14 / 22
Trust Live

Evidence-linked MCP selection and non-executing Safe-Call review; surfaces unknowns.

Developer ToolsCode & DevOps

Responded178 ms14 / 22
Hub Planner MCP by usefulapi

Read Hub Planner resources, projects, bookings and timesheets; create clients and time entries.

Developer ToolsCode & DevOps

Responded178 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

Responded179 ms14 / 22
Public Holidays & Business Days (200+ countries)

Compute deadlines in business days with public holidays (200+ countries). $0.002/call.

Developer ToolsCode & DevOps

Responded179 ms14 / 22
Axis LMS MCP by usefulapi

Read Axis LMS users, courses, learning paths, certifications and reports; manage enrollments.

Developer ToolsCode & DevOps

Responded179 ms14 / 22
IA-QA Security — 30 tools

Agent security: prompt injection, PII & secret scans, TLS/header/CORS audits, MCP checks. Free.

Developer ToolsCode & DevOps

Responded180 ms14 / 22
Dribba

Dribba: services, case studies, budget estimates and contact, as MCP tools.

Developer ToolsCode & DevOps

Responded181 ms14 / 22
Pentasor

Senses for agents on live sites and media: read, see, hear, drive a flow, verify a claim.

Developer ToolsCode & DevOps

Responded181 ms14 / 22
Sanctions Screen (OFAC, EU, UK, UN)

Screen a party vs OFAC, EU and UK sanctions lists before paying. $0.02/call via x402.

Developer ToolsCode & DevOps

Responded182 ms14 / 22
Airport Weather & Delays (METAR, TAF, FAA)

Airport METAR/TAF weather and FAA delays by airport code. $0.003/call via x402.

TravelCode & DevOps

Responded182 ms14 / 22
Responded182 ms14 / 22
GasNow

Live crypto fees: USDT transfer costs on 12 networks, exchange withdrawals, bridges and gas.

Finance & CryptoCode & DevOps

Responded183 ms14 / 22

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