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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1424 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
Outdated check584 ms12 / 22
CasaPrivat

Find homes sold by owners in Spain and France. Messages to owners need buyer consent; rate-limited.

OtherCommunication & messaging

Outdated check588 ms12 / 22
Lettera

Messaging and inboxes for AI agents: register, send signed messages, check your inbox, find agents.

ProductivityCommunication & messaging

Outdated check594 ms12 / 22
com.abundanceapis/abundance-apis

Try 26 utility REST APIs keylessly: NAICS classification, IP geo, email validation, currency.

Finance & CryptoCommunication & messaging

Outdated check614 ms12 / 22
SMSPVA Documentation

SMSPVA API docs: search and code examples for SMS activation, number rental and private email.

ProductivityCommunication & messaging

Outdated check614 ms12 / 22
x402 Domain Lookup & DNS Email Auth

Domain lookup (DNS records + RDAP registrar/age/expiry), bulk, and SPF/DKIM/DMARC audit via x402.

ProductivityCommunication & messaging

Outdated check617 ms12 / 22
Nityaflow

Build WhatsApp, Sheets and Gmail automations for Indian businesses; check GST credit.

ProductivityCommunication & messaging

Outdated check622 ms12 / 22
Wapiworld WhatsApp API

Check your WhatsApp numbers, connection status and webhooks, and send a text when you confirm.

OtherCommunication & messaging

Outdated check640 ms12 / 22
LeakData

Check breach exposure for your verified email and check locally computed password hash prefixes.

Developer ToolsCommunication & messaging

Outdated check685 ms12 / 22
digger.fans

Certify Digger (2026) cinema viewings from original ticket emails; leaderboard, fan cards, theaters.

ProductivityCommunication & messaging

Outdated check705 ms12 / 22
Shopemail

Design, preview, and export Shopify notification emails in your authorized Shopemail theme.

E-commerceCommunication & messaging

Outdated check771 ms12 / 22
Dreamlit

Create, test, publish, and manage Dreamlit notification workflows from AI clients.

Developer ToolsCommunication & messaging

Responded796 ms12 / 22
ai.powerline/inbox-preview

Render HTML/.eml emails in real Gmail, Outlook & Yahoo web clients and screenshot them

ProductivityCommunication & messaging

Outdated check873 ms12 / 22
Fine Structure

Build and host full-stack apps from a prompt, with agents that reach you on WhatsApp and email.

ProductivityCommunication & messaging

Outdated check890 ms12 / 22
Nova Inbox Agent by Nova (CIVAI)

Read and send mail from your Nova Inbox (@nova.civai.co) for OTPs, directory signups, and inbound m…

ProductivityCommunication & messaging

Outdated check954 ms12 / 22
Clannit MCP by Nova (CIVAI)

Create estate guest visit invites and read your Clannit notifications (including past invite codes…

Developer ToolsCommunication & messaging

Outdated check1134 ms12 / 22
Apple Search Ads MCP by Nova (CIVAI)

Manage Apple Search Ads from chat: sign in with Apple ID, check notifications, and pull campaign pe…

Marketing & SalesCommunication & messaging

Outdated check1324 ms12 / 22
MailX Email Deliverability

Check SPF/DKIM/DMARC/BIMI, blacklists, SMTP/IMAP; DNS lookups; generate email DNS records.

ProductivityCommunication & messaging

Responded1442 ms12 / 22
Lordevo Shop (x402 website checks)

33 paid x402 web/DNS/email/SSL checks for agents from $0.01 per call, plus 2 free tools.

ProductivityCommunication & messaging

Outdated check1459 ms12 / 22
com.domainposture/mcp

Remote MCP server: 19 domain-hygiene and email-auth tools (DNS, SPF, DMARC, DKIM, TLS).

ProductivityCommunication & messaging

Responded1466 ms12 / 22
FreightFA

Freight rate benchmarks (truckload, LTL, rail, intermodal, barge), market outlooks, FMCSA checks.

ProductivityCommunication & messaging

Outdated check2336 ms12 / 22
API Plan Finder

Best API plans + report on 46 conditions for scraping, SERP, search, browser, email, TTS, STT, docs

Developer ToolsCommunication & messaging

Outdated check2381 ms12 / 22
Mapsdata

Find and enrich local businesses from Google Maps with owners, emails, phones, websites, and more.

Developer ToolsCommunication & messaging

Outdated check4192 ms12 / 22
Responded30 ms12 / 22

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