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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2887 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
Sipflow

SIP/VoIP/telecom grounding for AI agents: vendor docs, RFCs, STIR/SHAKEN, traces, configs.

Developer ToolsCode & DevOps

Outdated check968 ms14 / 22
Linof docs

Linof turns family photos into a short film. Read Linof's docs and live prices. No sign-in.

MediaAI / LLM tooling

Responded970 ms14 / 22
Rate Ranger

Watch a hotel's price after your user booked it, and email them when it drops enough to rebook.

TravelCommunication & messaging

Responded996 ms14 / 22
io.github.mapbox/mcp-docs-server

AI access to Mapbox docs, API references, style specs, and guides. No token required.

Developer ToolsCode & DevOps

Outdated check1007 ms14 / 22
CyberNative public PDF accessibility check

Check a PDF on a public website for the structure screen readers use.

OtherFile & docs

Responded1027 ms14 / 22
TaScan

36 MCP tools for projects, tasks, workers, QR/NFC tags, and AI remediation. Task. Scan. Done.

Developer ToolsCode & DevOps

Responded1044 ms14 / 22
Docs-to-JSON

Convert documents to structured JSON (invoices, receipts, contracts) in 2 seconds

Finance & CryptoPayments & trading

Outdated check1100 ms14 / 22
SocialForex

Live forex, gold & crypto quotes, economic calendar, screener, currency strength, lot-size calc

Finance & CryptoCode & DevOps

Outdated check1158 ms14 / 22
Brainiall Image

Background removal, upscaling, face restore, document OCR, table extraction, visual understanding.

MediaFile & docs

Responded1170 ms14 / 22
Australia Wide First Aid docs

Search and read Australia Wide First Aid's developer docs, policies and first aid library.

OtherData access / search

Responded1266 ms14 / 22
Fiscalisto API docs

Docs for Fiscalisto's Mexican e-invoicing API (CFDI 4.0): search, operations, SDK code, errors.

Developer ToolsData access / search

Responded1711 ms14 / 22
Kaal Corpus: Verifiable Claim Layer

Cite the claim, not the paper: 5,033 assertions, each hash-verifiable against its source PDF

Developer ToolsCode & DevOps

Responded1822 ms14 / 22
Mailvett: Email Validation API for AI Agents

Mailvett: validate emails. MX, provider, disposable/role/free flags, typo fix, verdict.

Developer ToolsCommunication & messaging

Responded148 ms14 / 22
mosADD — the comms layer for AI agents

Command your AI agents by voice: PTT rooms, channels, direct messages, agent email, memory (mRAG).

ProductivityCommunication & messaging

Outdated check469 ms14 / 22
dev.primitive/email

Email infrastructure for AI agents — send, receive, search, and reply to email over MCP.

ProductivityCommunication & messaging

Responded823 ms14 / 22
com.ainetcafe/netcafe-translate

Translation that never breaks structure: .srt timings, i18n key trees, PDF layout.

OtherFile & docs

Responded8371 ms14 / 22
Icypeas

Icypeas MCP — wraps the Icypeas email-search API (icypeas.com)

Developer ToolsCommunication & messaging

Responded103 ms14 / 22
Hunter

Hunter.io MCP — wraps the Hunter.io email finder & verification API (hunter.io)

Developer ToolsCommunication & messaging

Responded114 ms14 / 22
Fonto Docs

Fonto (FontoXML) documentation for AI tools. Converts DITA XML to Markdown on demand.

Developer ToolsFile & docs

Outdated check172 ms14 / 22
HTML Email Playbook

Teaches AI to write HTML email that renders in Outlook, Gmail, and Apple Mail. 21 rules, 6 comps.

ProductivityCommunication & messaging

Outdated check466 ms14 / 22
Actora Tenant — Hosted Chat, Tasks & Usage

Actora B-side tools: hosted chat, sessions, tasks, tenant plan and usage.

Real Estate & PropertyCode & DevOps

Responded656 ms14 / 22
Actora — Agent Identity, Subscriptions & A2A

ERC-8004 agent identity, on-chain subscriptions, reputation, A2A tasks and chat over 53 tools.

Finance & CryptoPayments & trading

Responded1124 ms14 / 22
Perfume Picks

Search the Perfume Picks fragrance database: 10,000+ scents with notes, dupes, and wear data.

Developer ToolsDatabase

Outdated check1537 ms14 / 22
Findymail

Findymail MCP — B2B email finder & reverse-email lookup (findymail.com)

Developer ToolsCommunication & messaging

Responded6139 ms14 / 22

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