MCP HeartbeatTHE MCP OBSERVATORY
Public workspace

Explore

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.

Connect your agent

2942 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
io.github.Shreyas-Profile/docs-mcp

Vector RAG store for Word/Excel/PDF/PowerPoint. Break-even pricing, $5 per 5,700 pages.

Developer ToolsFile & docs

Outdated checkNot measured4 / 22
Outdated checkNot measured4 / 22
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Outdated checkNot measured4 / 22
org.scienceswarm/commerce-validators

Commerce validators: live EU VAT (VIES), EORI, email/MX lookups; IBAN/ABA/GTIN checksums; VAT rates.

ProductivityCommunication & messaging

Outdated checkNot measured4 / 22
1RBT terse agent record

Record agent tasks, get back how many finished without a human. Closed beta, nothing billed.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22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Outdated checkNot measured4 / 22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 Commons

Free citation deduplication, JSON checks, agent discovery, shared tasks and evidence review.

Developer ToolsKnowledge & memory

UnreachableNot measured4 / 22
Agent Commons

Free citation deduplication, JSON checks, agent discovery, shared tasks and evidence review.

Developer ToolsAI / LLM tooling

Outdated checkNot measured4 / 22
AgentKit x402 - pay-per-call tools for agents

Email, DNS, SPF/DMARC, site contacts, Markdown, IBAN, Swedish validators. Pay per call (x402).

ProductivityCommunication & messaging

Outdated checkNot measured4 / 22
AI Cloud Studio Storefront — 5-in-1 Digital Bundle & SaaS Buyout Hub

Download verified SaaS source code, PDF/DOCX/PPTX executive packs & x402 agent kits.

Developer ToolsFile & docs

Outdated checkNot measured4 / 22
AI-operated. Email authentication reader: six free tools, no key, no signup.

AI-operated. Free SPF (RFC 7208 count), DMARC, MTA-STS, DMARC rua/ruf readers. Paid audit $29.

ProductivityCommunication & messaging

Outdated checkNot measured4 / 22
AIsa Creator Discovery

Find creators from a seed profile or a brief, and look up their contact email.

ProductivityData access / search

Outdated checkNot measured4 / 22
Bavlio

LinkedIn + cold email outreach: find leads, launch personalized campaigns, manage replies.

Marketing & SalesCommunication & messaging

UnreachableNot measured4 / 22
BitsWeave

Read and write shared BitsWeave context, projects, tasks, and work sessions through MCP.

Developer ToolsCode & DevOps

UnreachableNot measured4 / 22
BrainMop

Read/write notes on BrainMop, a hosted notes app. Paid feature, 30-day free trial; account required.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
Cosmonote

Access your Cosmonote audio notes, transcriptions, summaries, and action items.

MediaAI / LLM tooling

Outdated checkNot measured4 / 22
Cronch

Cron jobs for your body: meals, water and breaks planned around your calendar, one tap to do.

ProductivityAutomation & workflows

Outdated checkNot measured4 / 22
Dewey

Agentic search over your Dewey document collections from any MCP-compatible client.

Developer ToolsFile & docs

Outdated checkNot measured4 / 22
Email Deliverability Audit API

Audit email domain deliverability: SPF, DKIM, DMARC, MX. Score 0-100. x402.

Developer ToolsCommunication & messaging

Outdated checkNot measured4 / 22
Email Finder API

Find email addresses from name and company domain. x402 paid.

Developer ToolsCommunication & messaging

Outdated checkNot measured4 / 22
Email Send API

Send emails programmatically via Resend. Text and HTML. x402 micropayment.

Developer ToolsCommunication & messaging

Outdated checkNot measured4 / 22
Email Verification API

Verify emails: syntax, MX records, disposable detection, quality score 0-100. x402 USDC.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
flingflyers

Share an HTML page or PDF as a short public link. No account or API key, expires on its own.

OtherFile & docs

UnreachableNot measured4 / 22
Galley Render

JSON in, PDF out. Render invoices, certificates, reports and cards from a template and a payload.

Finance & CryptoPayments & trading

UnreachableNot measured4 / 22

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