MCP HeartbeatTHE MCP OBSERVATORY
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Evidence for your next connection.

Independent measurements of remote MCP servers. Every observation has a timestamp.

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DiscoveryServer directory

Remote MCP servers

Find a server for your workflow, with connection evidence you can inspect.

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976 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
Mem0 Cloud

A hosted agent-memory API shaped like mem0's REST API (an alternative to running mem0 yourself):...

Developer ToolsKnowledge & memory

Requires authNot measured3 / 22Not checked yet
Muninn (munn.is)

The memory that doesn't belong to the model. Encrypted, cross-vendor memory for AI agents.

Developer ToolsKnowledge & memory

Requires authOutdated checkNot measured3 / 22
NASC — Networked AI Session Continuity

Shared memory across AI dev tools: each session hands its context to the next, not starting cold.

OtherKnowledge & memory

Requires authOutdated checkNot measured3 / 22
NDBase: Laws of Kazakhstan

Search and read current Kazakhstan legislation: 7,400+ acts, exact article text, citations.

LegalKnowledge & memory

Requires authNot measured3 / 22Not checked yet
Nuto

A planner that keeps itself, with memory across AI agents.

Developer ToolsKnowledge & memory

Requires authOutdated checkNot measured3 / 22
OpenAlex

Search 250M+ research papers, citations and author profiles. Free OpenAlex account; OAuth sign-in.

OtherKnowledge & memory

Requires authOutdated checkNot measured3 / 22
OpenAlex Papers (Apify Actor) by Tuper

OpenAlex academic papers, authors and citations search via the official API. Runs on Apify.

OtherKnowledge & memory

Requires authNot measured3 / 22Not checked yet
Passim AI

Passim AI (formerly BIA Edge): U.S. immigration case law, INA/CFR, USCIS policy, and a citator.

LegalKnowledge & memory

Requires authOutdated checkNot measured3 / 22
QuillCaddie MCP

OAuth-protected, read-only-by-default MCP server for provenance-labeled QuillCaddie project memory.

Developer ToolsKnowledge & memory

Requires authOutdated checkNot measured3 / 22
Research Papers MCP

Research papers for AI agents: PubMed, arXiv, Crossref; citations, references, open access texts

Developer ToolsKnowledge & memory

Requires authNot measured3 / 22Not checked yet
Sacred Texts MCP

Citation-oriented retrieval across six religious traditions

Developer ToolsKnowledge & memory

Requires authOutdated checkNot measured3 / 22
Secrets.RealEstate

French address intelligence: 18.6M sold prices, energy, risk, crime and schools — each sourced.

EducationKnowledge & memory

Requires authNot measured3 / 22Not checked yet
StackFast FractWin Expert Brain

Expert knowledge base for sales, negotiation, strategy, operations, and risk.

Developer ToolsKnowledge & memory

Requires authNot measured3 / 22Not checked yet
stagenth · AI 记忆库

Hosted persistent memory with semantic search, importance and TTL for AI agents.

Developer ToolsKnowledge & memory

Requires authNot measured3 / 22Not checked yet
Stompy – AI Memory for Claude & MCP Agents

Persistent AI memory with semantic search, conflict detection, and ticketing.

Developer ToolsKnowledge & memory

Requires authOutdated checkNot measured3 / 22
StudioMeyer Memory

Bi-temporal AI memory. 56 tools, knowledge graph, semantic search. EU-hosted, free tier.

OtherKnowledge & memory

Requires authOutdated checkNot measured3 / 22
Talarion

A knowledge base of verified, dated facts your LLM would otherwise get wrong.

Developer ToolsKnowledge & memory

Requires authOutdated checkNot measured3 / 22
Talkfirst

Speak English, Polish, Lithuanian, Czech (beta): pronunciation, voice chats, quizzes, audio lessons

EducationKnowledge & memory

Requires authOutdated checkNot measured3 / 22
Terranimus Memo

Company memory for Terranimus: search, read and save what a company knows (OAuth).

OtherKnowledge & memory

Requires authOutdated checkNot measured3 / 22
TRAME

Construction labour-hour estimates with durations, weather and contract model (French)

LegalKnowledge & memory

Requires authOutdated checkNot measured3 / 22
UAE Juris

Search and cite UAE law (federal, Dubai, Abu Dhabi, DIFC, ADGM) with verifiable citations.

GovernmentKnowledge & memory

Requires authOutdated checkNot measured3 / 22
UK Data: Reference

Wikipedia summaries, books by ISBN, products by barcode, IP ownership, unit conversion

OtherKnowledge & memory

Requires authNot measured3 / 22Not checked yet
UK Data: Research papers

Search 250M scholarly works (OpenAlex, Crossref, arXiv, PubMed) and resolve any DOI

OtherKnowledge & memory

Requires authNot measured3 / 22Not checked yet
UK Data: UK Parliament bills and SIs

Where a UK bill, treaty or statutory instrument is in Parliament: stages, sponsors, amendments

LegalKnowledge & memory

Requires authNot measured3 / 22Not checked yet

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