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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1055 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
net.alpha-systems/pdf

Markdown to PDF: headings, bold, code, lists, rules. A4/Letter/Legal. Free 30/hr. MCP + REST.

LegalFile & docs

Outdated checkNot measured4 / 22
site.jigwell/jigwell

Pay-per-call tools for AI assistants: code, data, finance, spreadsheets, media, web, time.

ProductivityFile & docs

Outdated checkNot measured4 / 22
AARF Utility Network

Paid AI utilities for web comparison, code checks, document extraction, security, and research.

OtherFile & docs

Outdated checkNot measured4 / 22
Agent Permissions Index

Grade Claude Code, Gemini CLI and Cursor configs for risky permissions; get public config stats.

Developer ToolsAI / LLM tooling

UnreachableNot measured4 / 22
checklist.day Registry

Registry of Python AI/ML libraries: correct imports, quickstart code, and known footguns.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
Data APIs SEC Event Intelligence API

Data APIs SEC Event Intelligence API for SEC API/EDGAR filings, OpenAPI, MCP, A2A at data-apis.com.

Developer ToolsCode & DevOps

UnreachableNot measured4 / 22
DepScope

Package intelligence MCP for AI agents — 22 tools, 19 ecosystems, AGPL SDK, free.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
HuaweiCloud DevKit (Community Preview)

Community preview of HuaweiCloud DevKit MCP server (official: io.github.huaweicloud)

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
Indiana Code

Search unofficial Indiana Code, IGA companions, and appellate cases. Not legal advice.

LegalData access / search

UnreachableNot measured4 / 22
Inthread

Sign in with email or GitHub. Invite others. Agent-to-agent, threaded, async MCP message inbox.

ProductivityCommunication & messaging

Outdated checkNot measured4 / 22
Kaito Query Service

AI LLM with Gemini, MiniMax, Replicate, OpenRouter. Vision, search, code review. USDC on Base.

Developer ToolsAI / LLM tooling

Outdated checkNot measured4 / 22
KTA-Oracle

Live KTA rates, market data, payment rails, AML/VAT compliance, SDK snippets. 16 tools.

Finance & CryptoData access / search

Outdated checkNot measured4 / 22
Measured data: Claude Code and the coding-agent market

Measured weekly data on Claude Code and coding agents: costs, plugins, MCP registry, npm, HN, issues

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
SetFork

Runnable, versioned lists for agents: tools, prompts and lists as resources. Git under the hood.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
ShipReady Metrics

Read-only scan of a public GitHub repo for leaked secrets, with a 0-100 grade.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
SIC Codes UK

UK SIC code lookup, GICS/ICB mapping, and Companies House search. 731 codes, 5.6M companies.

Developer ToolsData access / search

Outdated checkNot measured4 / 22
Sourced

Source code search for every package on PyPI and npm.

Developer ToolsData access / search

Outdated checkNot measured4 / 22
Tentra — Memory for AI Coding Agents

Memory for AI coding agents. Call graphs + refactor safety + persistent code context. 35 MCP tools.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
ToolPipe MCP Server

45+ dev tools via MCP: JSON, QR, hash, DNS, code review, fake data, screenshots, and more.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
ToolPipe MCP Server

238+ dev tools via MCP: JSON, QR, PDF, DNS, hash, UUID, code review, JWT, SSL, WHOIS, and more

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
ai.aient/mcp

MCP-native AI SRE: ask what's broken in production, get a reviewed GitHub fix PR.

Developer ToolsCode & DevOps

Requires authOutdated checkNot measured4 / 22
ai.cdbx/mcp-server

Build Apps and run code in 30 languages — sandboxed, with persistent sessions for agent loops.

Developer ToolsCode & DevOps

Requires authNot measured4 / 22Not checked yet
ai.perfloop/perfloop

Always-on performance engineering for your own code: proven pull requests, the merge stays yours.

OtherOther

Requires authOutdated checkNot measured4 / 22
app.miromiro/miromiro

Turn any live website into brand colors, fonts, design tokens, SVGs, Lottie and paste-ready code.

OtherOther

Requires authOutdated checkNot measured4 / 22

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