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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2928 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
uk.quantdata/quantdata

Four market-statistics tools + a free qd_ key by email: 1 anonymous look, then 10 calls/UTC day.

Data & AnalyticsCommunication & messaging

UnreachableNot measured5 / 22
Agent Tools

9 utility tools for agents: DNS, WHOIS, email, IP, URL, headers, QR, text, tech. x402 on Base.

Developer ToolsCommunication & messaging

UnreachableNot measured5 / 22
AgentPay

x402 micropayments MCP: Xiaohongshu notes and paid APIs settled in USDC on Base.

Finance & CryptoPayments & trading

UnreachableNot measured5 / 22
AgentToolbox Docs Pack

Query-matched doc excerpts in one JSON response. $0.01 USDC on Base via x402, pay-per-success.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
artifact-site

One place for every AI agent's pages and docs: versioned links to share, search and update.

Developer ToolsCode & DevOps

Outdated checkNot measured5 / 22
Axiom Works AgentReader

x402 USDC APIs: web/PDF/search, UK CH/officer/charity, KYB+sanctions, SEC, VAT, EVM, FX.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
Benchline

Open-source developer, PDF, image, SEO and security tools over a stateless HTTP MCP server. No key.

MediaCode & DevOps

Outdated checkNot measured5 / 22
Clearly

Find and manage Clearly workspace docs, canvases, sheets, decks, projects, boards, and tickets.

OtherOther

UnreachableNot measured5 / 22
Could Have Been Email

could-have-been-email MCP — wraps StupidAPIs (keyless — no credential needed)

Developer ToolsCommunication & messaging

Outdated checkNot measured5 / 22
DERO MCP Server

Read-only DERO blockchain MCP: 33 tools (12 composites) incl. TELA discovery + bundled docs.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
DMARC Shark — Email DNS Checker

Check a domain's public SPF, DMARC, MX and DKIM DNS records on demand. No account required.

ProductivityCommunication & messaging

Outdated checkNot measured5 / 22
Domain & Company Intel MCP

Domain intel for AI agents: RDAP registration, DNS, email deliverability, tech stack.

Developer ToolsCommunication & messaging

Outdated checkNot measured5 / 22
Email Verification MCP

Verify emails — deliverability, disposable/role/free detection, MX validity, domain age.

Developer ToolsCommunication & messaging

Outdated checkNot measured5 / 22
Encouragement MCP

Provides short, positive encouragement messages for AI agents during long-running or difficult tasks

Developer ToolsCode & DevOps

Outdated checkNot measured5 / 22
GoAI Moat Email Person Lookup

Reverse email lookup: find the person behind an email (name, title, company).

ProductivityCommunication & messaging

Outdated checkNot measured5 / 22
Grounders MCP

Multiple Google accounts (Gmail, Calendar, Drive, Contacts, Tasks) in one Claude connector.

ProductivityCommunication & messaging

Outdated checkNot measured5 / 22
ImagePay MCP

ImagePay MCP: 40 x402 paid API tools (OCR, PDF, image, QR, tabular, web). Pay per call on Base.

MediaCode & DevOps

Outdated checkNot measured5 / 22
Kelvia

Task manager your agent can fully operate: boards, tasks, sprints, roles, worklogs, day planner.

Developer ToolsCode & DevOps

Outdated checkNot measured5 / 22
life.ayushrai.site docs MCP

Read-only index of the public documentation and section pages on life.ayushrai.site.

Developer ToolsFile & docs

UnreachableNot measured5 / 22
llms.txt for agents

Any site's llms.txt: find the covering index, read its linked docs as markdown, search sections.

Developer ToolsFile & docs

UnreachableNot measured5 / 22
MagicInterview

Live interview and meeting coaching with saved context and Notion sync. Audio runs in the full app.

ProductivityFile & docs

Requires authNot measured5 / 22
MCP Security Sanitizer

Redacts common secrets, email addresses, and phone numbers.

Developer ToolsCommunication & messaging

Outdated checkNot measured5 / 22
MCP Security Sanitizer

Redacts common secrets, email addresses, and phone numbers.

Developer ToolsCommunication & messaging

Outdated checkNot measured5 / 22
PDFMakerAPI

Turn a description into a shareable, editable PDF — invoices, certificates, reports, resumes.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22

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