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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7963 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
ai.sentfrom/mcp

Email for AI agents: inboxes, send/reply/forward, search, threads, webhooks — 21 SentFromAI tools.

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
ai.syntheticbrew/syntheticbrew

Embed an AI chat widget on your website from your coding agent: provision, configure, get snippet.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22
app.causely/causely

Causal reasoning for reliability: root cause, blast radius, and service health for agents.

OtherOther

Requires authNot measured5 / 22
app.oddsrail/polymarket-kalshi-trading

Cross-venue prediction markets for AI agents: Polymarket + Kalshi, costed and attributed

Finance & CryptoPayments & trading

Requires authOutdated checkNot measured5 / 22
app.twiceshy/twiceshy

Experience memory for coding agents: validated traps, fixes and dead-ends at decision time.

Developer ToolsKnowledge & memory

Requires authNot measured5 / 22Not checked yet
cloud.nordicdata/nordic-data

Global B2B intelligence for AI agents: 35M+ companies, 1.6M sanctions, KYB pack. 78 tools.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22Not checked yet
co.skillsandagents/catalog-mcp

Search and fetch skills from your org's Skills and Agents catalog. Bearer token required.

Developer ToolsData access / search

Requires authNot measured5 / 22Not checked yet
com.agenticcontrolplane/acp-mcp-server

See, price, and control every tool call your AI agents make: policy checks, cost, and audit tools.

OtherAI / LLM tooling

Requires authNot measured5 / 22
com.browser-use/browser-use

Browser agents and stealth cloud browsers for AI: run web tasks, fill forms, extract data.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22Not checked yet
com.busabase/busabase

Database for your AI agent. Turn its output into data, docs, skills, and apps you can actually use.

Developer ToolsDatabase

Requires authNot measured5 / 22
com.covasyn/chemistry

Deterministic MCP for AI agents: drug discovery, ADMET, docking, LNPs, DoE, retrosynthesis, ICH M7

HealthcareData access / search

Requires authNot measured5 / 22
com.decionis/mcp

Authorize consequential AI agent actions before execution

Developer ToolsCode & DevOps

Requires authNot measured5 / 22
com.deerdawn/deerdawn

AI session memory: the brief your AI reads before every session so no session starts cold.

OtherKnowledge & memory

Requires authNot measured5 / 22
com.digitalpublic/marketing-operations

Project-scoped marketing ops for agents: Bearer dpk_/dpa_ or OAuth, read and supervised write.

Marketing & SalesData access / search

Requires authNot measured5 / 22
com.energyaisolution/energyai

Solar, weatherization, EV charging, battery and heat-pump decision tools for AI agents.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22Not checked yet
com.esti-maite/construction-takeoff-estimating

Construction takeoff and estimating for AI agents. Measure a drawing PDF, export a priced estimate.

Developer ToolsFile & docs

Requires authNot measured5 / 22
com.formpaste/formpaste

Create and wire up contact forms from your coding agent. Forms, snippets, and submissions.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22Not checked yet
com.furrowforms/furrow-forms

Form backend an agent runs end to end: provision forms, snippets, spam, signed webhooks.

Developer ToolsAutomation & workflows

Requires authNot measured5 / 22Not checked yet
com.getappniche/mcp

Live App Store & Google Play data for AI agents: app discovery, ASO keywords, reviews.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22Not checked yet
com.humaux/memory

Persistent long-term memory for AI agents: semantic search, knowledge graph, and task canvas.

Developer ToolsKnowledge & memory

Requires authNot measured5 / 22
com.inboxpolicy/send-decision

Send-decision email verification: agents get send/review/avoid with evidence, pay-per-call via x402.

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
com.llm-bus/llm-bus

Coordinate multiple AI agents over MCP: atomic claims, leases, shared ledger, handoffs, tasks.

Finance & CryptoAI / LLM tooling

Requires authNot measured5 / 22
com.marutap/marutap

Agent requests a purchase, the human taps approve, the agent gets a card scoped to it.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22Not checked yet
com.maxoperf/maxoperf

Load & browser performance testing — drive MaxoPerf from your AI agent with your API key.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22Not checked yet

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