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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18175 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
Pressa - LaTeX to PDF

Compile LaTeX to PDF without installing TeX Live. No API key needed to start.

Developer ToolsCode & DevOps

Responded324 ms15 / 22
MCP security checks — WARDEN and HISTOR

Scan MCP tool definitions for poisoning, look up server history, count tool-list tokens. Free.

Developer ToolsData access / search

Responded327 ms15 / 22
NAIF Gravity

Free MCP/API diagnostics. Micro Tools V2: free preview, $1 JSON check, $2 API shape, $3 normalize.

Developer ToolsCode & DevOps

Responded330 ms15 / 22
Family Office Knowledge Graph

Family Office Knowledge Graph: read-only MCP door over the public record. Agentic KG Holdings.

Developer ToolsCode & DevOps

Outdated check330 ms15 / 22
Orb Studio news radars

News radars with AI anchors, market and network sensors, a daily violin piece composed from them

Developer ToolsCode & DevOps

Responded331 ms15 / 22
Green Gooding

Read-only catalog for Green Gooding — NYC peer-to-peer rental marketplace.

Developer ToolsCode & DevOps

Responded332 ms15 / 22
Health Record Rights Index

Health record rights: 198 countries scored 0 to 100 with sources; the 50 states and DC; real cases.

Developer ToolsCode & DevOps

Responded332 ms15 / 22
Humanuscrit — HAPP

Submit a literary text in French to Humanuscrit, a publisher open to humans and AI agents.

Developer ToolsCode & DevOps

Outdated check332 ms15 / 22
AP Score Distributions

Official College Board AP score distributions 2026, 2025, 2024: percentiles, pass rates.

Developer ToolsCode & DevOps

Responded342 ms15 / 22
VulKill Security

Autonomous AppSec & DAST scanner across 12 security domains (260+ controls) with 3-Layer Triage.

Developer ToolsCode & DevOps

Responded346 ms15 / 22
SameDayDesk agent tools

Readiness checks, a paid Fix Pack, TaskMarket reads, and caller-declared funnel evidence.

Developer ToolsCode & DevOps

Outdated check350 ms15 / 22
ORA · ORUM

Autonomous organism: symbolic field-state, verified-provenance art licensing, x402 referral.

Developer ToolsCode & DevOps

Responded356 ms15 / 22
EQVPS — VPS and code sandboxes for AI agents

No-KYC VPS + per-second code sandboxes AI agents run over MCP — 75 tools, SDK, pay BTC/XMR/USDC/USDT

Developer ToolsCode & DevOps

Responded361 ms15 / 22
BMLT Meetings

Search Narcotics Anonymous meetings worldwide via the BMLT directory.

Developer ToolsCode & DevOps

Responded365 ms15 / 22
Strale

Hundreds of pay-per-call tools for agents: company records, screening, validation, web reading.

Developer ToolsCode & DevOps

Responded368 ms15 / 22
Neuronto ARD Registry: Agentic Resource Discovery (ARD) Index

Agent Resource Discovery (ARD, IETF draft) registry: search every ARD registry + verified MCP tools

Developer ToolsData access / search

Outdated check369 ms15 / 22
SEC EDGAR Insider Trades & Financials

SEC EDGAR for agents: Form 4 insider trades, cluster buys, filings, XBRL financials and search.

Developer ToolsCode & DevOps

Responded370 ms15 / 22
FactReason

Check exact npm/PyPI upgrades for evidence-backed breaking changes; query APIs and components.

Developer ToolsCode & DevOps

Responded371 ms15 / 22
DomainKits

Search newly registered, expired, aged, active, deleted and for-sale domains, plus WHOIS and DNS.

Developer ToolsCode & DevOps

Outdated check371 ms15 / 22
Privi Quantum

Quantum on IonQ/IBM/Braket: spending mandates, signed benchmarks, paid PQC CBOM, advantage receipts.

Developer ToolsCode & DevOps

Responded379 ms15 / 22
Supplementscanner

Live supplement prices per kg, serving or capsule from stores across Europe. Free, no API key.

Developer ToolsCode & DevOps

Responded380 ms15 / 22
Proof Holdings

One API, all things verified — control, delegation, human approval, anti-impersonation.

Developer ToolsCode & DevOps

Outdated check380 ms15 / 22
California C-10 Contractor Check

Paid source-linked California electrical contractor license preflight.

Developer ToolsCode & DevOps

Responded384 ms15 / 22
Source Library

Search 15K rare pre-modern texts translated to English: philosophy, religion, science, literature.

Developer ToolsCode & DevOps

Responded384 ms15 / 22

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