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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2874 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
acdoyle

Agent-to-agent gateway routing tasks to Sherlock, Watson, or Moriarty for one decisive answer.

Developer ToolsCode & DevOps

Outdated check481 ms14 / 22
Docs MD — Markdown Share

Share markdown as public links from your AI assistant — expiring or permanent, no API key.

OtherFile & docs

Outdated check502 ms14 / 22
Penniless Data Utilities

Ten x402-paid tools for JSON, YAML, cron, diff, text, DNS, WHOIS, GitHub, crypto, and email.

Finance & CryptoCommunication & messaging

Outdated check513 ms14 / 22
VerifyPulse: email deliverability checks

Daily SPF, DKIM, DMARC and MX monitoring with webhook alerts, plus free sending-domain audits.

Developer ToolsMonitoring & observability

Outdated check524 ms14 / 22
Imperium RAG-Diet — Web & Document Context Distiller (85-97% Token Savings)

Strips 85-97% of HTML/DOM boilerplate into clean Markdown, skeletons, or BM25-ranked RAG chunks.

Developer ToolsFile & docs

Outdated check527 ms14 / 22
AgentDiet ArXiv AI/CS Paper Search & Structured Token-Diet Digest

Queries ArXiv for AI/CS/math papers and returns structured abstracts, authors, PDF links, and Bib.

OtherKnowledge & memory

Outdated check542 ms14 / 22
Candor UI docs

Candor UI docs and component suggestions. Read-only, no key, never serves paid source.

OtherOther

Outdated check544 ms14 / 22
bitHuman docs

The bitHuman docs over MCP: two read-only tools, search and fetch; it needs no account and no key.

Developer ToolsData access / search

Outdated check562 ms14 / 22
FamilyLore

Reads handwritten family letters in old scripts and translates them, with notes on what they meant.

ProductivityFile & docs

Responded565 ms14 / 22
Shortlist Price Index

Software prices for AI agents: hosting, SEO, backup, antivirus, email and more. True 3-year cost

Developer ToolsCommunication & messaging

Outdated check574 ms14 / 22
ARAM Mayhem

ARAM Mayhem builds, tiers, augments, combos and patch notes with canonical page citations.

Developer ToolsCode & DevOps

Outdated check575 ms14 / 22
KDAN PDF

Upload, edit, compress, protect, redact, and compare PDFs with KDAN PDF in Claude and ChatGPT.

Developer ToolsAI / LLM tooling

Outdated check577 ms14 / 22
io.github.palthainon/oldweb-diagnostics

Public DNS, HTTPS and deployment checks, plus offline email header and delivery-log tracing.

Developer ToolsMonitoring & observability

Responded579 ms14 / 22
DarkFunnels documentation

Search and read the DarkFunnels docs: WhatsApp AI sales agents connected by QR, no Meta Cloud API.

Developer ToolsFile & docs

Outdated check583 ms14 / 22
AgentDiet B2A Email Deliverability, MX, SPF & DMARC Verifier

Validates email syntax, disposable/burner provider status, role accounts, and live DNS MX/SPF/DMA.

ProductivityCommunication & messaging

Outdated check588 ms14 / 22
io.github.khaoss85/agent-crm

Read-only docs for the Accordo CRM framework: what it proves, and where it stops.

Developer ToolsCode & DevOps

Responded597 ms14 / 22
smry Product

Read public sources and manage a smry library, feeds, notes, highlights, files, and page monitors.

ProductivityFile & docs

Outdated check604 ms14 / 22
Layerre

Turn Canva designs into templates and render image/PDF variants via the Layerre API.

MediaFile & docs

Outdated check607 ms14 / 22
SMS and WhatsApp Messaging

Send WhatsApp, SMS, email or voice to a business with the compliance gate enforced.

ProductivityCommunication & messaging

Outdated check618 ms14 / 22
Goldsky

Goldsky docs: Edge RPC on 150+ chains, Feeds APIs, Subgraphs, Turbo, x402 pay-per-request.

Finance & CryptoPayments & trading

Outdated check618 ms14 / 22
Speed Reader

Turn any article, document, or chat reply into a one-word-at-a-time RSVP reading session.

OtherFile & docs

Outdated check623 ms14 / 22
Sikaru Docs

Read-only search over the public Sikaru documentation: managed agents, inference, evals and traces.

Developer ToolsFile & docs

Outdated check624 ms14 / 22
ai.radmail/radmail-mcp

Email OS for agents - real-inbox search, triage, commitments, and a verifiable BEC hard-stop.

ProductivityCommunication & messaging

Responded628 ms14 / 22
Wizeb AI-Native Index

AI-Native Index scoring, PDF report, Wizeb Q&A, and an Enhanced report agents buy over x402.

Finance & CryptoPayments & trading

Outdated check629 ms14 / 22

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