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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2929 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
Penny Search

Low-cost live web search for current facts, news, research, docs, and web grounding via x402.

Developer ToolsData access / search

Outdated checkNot measured5 / 22
projectstate

Per-project memory for AI agents: decisions, attempts, tasks, ranked recall. Paid per call via x402.

Finance & CryptoKnowledge & memory

UnreachableNot measured5 / 22
Ranuk DataCanvas BI

Interactive data visualization and executive PDF dashboards for ChatGPT, Claude, and Cursor.

Developer ToolsCode & DevOps

Outdated checkNot measured5 / 22
Send Email

Send emails from natural language prompts.

Developer ToolsCommunication & messaging

Outdated checkNot measured5 / 22
Send That Email

send-that-email MCP — wraps StupidAPIs, keyless: analyze whether you should send that email…

Developer ToolsCommunication & messaging

Outdated checkNot measured5 / 22
Space

One shared memory for all your AI agents: documents, tasks, databases and memories in one workspace

Developer ToolsDatabase

UnreachableNot measured5 / 22
Tack

Task management for people and AI agents, with scoped OAuth access to issues, projects, and docs.

Developer ToolsCode & DevOps

UnreachableNot measured5 / 22
Todo MCP

Create, list, and complete todo items through MCP.

Developer ToolsCode & DevOps

Outdated checkNot measured5 / 22
UsageMax public observability

Read-only MCP for AI usage profiles, leaderboards, stats, and docs; no writes or private data.

Developer ToolsMonitoring & observability

Outdated checkNot measured5 / 22
ai.bobwork/emailwarmup

Warm up mailboxes, check the ready-for-outbound gate, run cold email and get checkout links.

Finance & CryptoPayments & trading

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

Turn documents into structured data: parse, extract, classify, split, and fill PDF forms.

OtherFile & docs

Requires authNot measured5 / 22
ai.openhelm/email-outreach

Goal-directed email outreach: research, draft, send, triage replies. Real data, never fabricated.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured5 / 22
ai.openhelm/openhelm

Autonomous cloud agent tasks: real browser + your tools, structured evidence-backed results.

Developer ToolsCode & DevOps

Requires authOutdated checkNot measured5 / 22
ai.verifox/email-verifier

Verify email deliverability & find business emails (single or bulk) via the Verifox API.

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
app.homotope/homotope

Vectorize images to SVG, PDF, EPS or DXF, and check a DXF before cutting.

MediaFile & docs

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.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.filetypeconverters/converter

Convert files between 44 formats: documents, spreadsheets, images, ebooks, email and subtitles.

ProductivityFile & docs

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

Access your Goodword relationships: contacts, notes, reminders, intros, recommendations.

ProductivityFile & docs

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.qmailing/mcp-server

AI agents read & send email, manage mailboxes, domains and webhooks via the QMailing API.

ProductivityCommunication & messaging

Requires authNot measured5 / 22
com.securessmtp/securessmtp

Send email, manage sending domains, and read delivery analytics from your SecureSMTP account.

Data & AnalyticsCommunication & messaging

Requires authNot measured5 / 22

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