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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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
Vision6 MCP by usefulapi

Read Vision6 lists, contacts, messages and reports; update contacts; send transactional email/SMS.

ProductivityCommunication & messaging

Outdated check65 ms13 / 22
Stibee MCP by usefulapi

Read subscribers, emails and email stats, and add subscribers and group members in Stibee.

ProductivityCommunication & messaging

Outdated check65 ms13 / 22
MailerCheck MCP by usefulapi

Check MailerCheck credits and lists, and run confirmed asynchronous email verification.

ProductivityCommunication & messaging

Outdated check65 ms13 / 22
beep.me

Find when public events happen and get email reminders before them, following moved matches.

ProductivityCommunication & messaging

Responded66 ms13 / 22
Spoke Phone MCP by usefulapi

Read Spoke calls, transcripts, directory and users; manage phonebook contacts and send SMS.

ProductivityCommunication & messaging

Outdated check68 ms13 / 22
Recapwren Client Reports

Weekly client reports: change, % change, targets, status, printable page and email text. Free.

ProductivityCommunication & messaging

Responded70 ms13 / 22
SMSGlobal MCP by usefulapi

Read account details, contacts, groups, SMS history, numbers and opt-outs.

ProductivityCommunication & messaging

Outdated check72 ms13 / 22
Reoon Email Verifier MCP by usefulapi

Read Reoon credits, quick-check emails, and run confirmed bulk verification jobs.

ProductivityCommunication & messaging

Outdated check79 ms13 / 22
data-cleanup: fix a messy CSV before you load it

Fix messy CSVs in one call: trim, ISO dates, normalize emails/phones, flag dupes. x402 $0.005, Base

ProductivityCommunication & messaging

Responded85 ms13 / 22
txtreel

Free iMessage, WhatsApp, Instagram DM and Reddit chat videos (1080x1920 MP4) and screenshots.

MediaCommunication & messaging

Outdated check86 ms13 / 22
humans fix ai

Ask a real, manually approved developer for help. Nothing is sent until you confirm by email.

ProductivityCommunication & messaging

Outdated check90 ms13 / 22
FabTally Valid

Validation suite: EU VAT (VIES), IBAN mod-97, email (MX+disposable), geo place lookup, VIN decode.

Developer ToolsCommunication & messaging

Outdated check91 ms13 / 22
Funkel AI

Run LinkedIn and email outreach: find leads, manage campaigns, and reply to prospects.

Marketing & SalesCommunication & messaging

Outdated check94 ms13 / 22
GramForge

Chat assistants for small businesses on Telegram: use cases, pricing, guides, sign-up links.

OtherCommunication & messaging

Responded96 ms13 / 22
InboxGuards Email Check

Check emails before you send, and get a $1 SPF/DKIM/DMARC fix plan for your domain. Pay per call.

ProductivityCommunication & messaging

Outdated check100 ms13 / 22
Statiko — Telegram trends & channel analytics

Live Telegram data: trending topics, channel profiles & metrics, post history incl. edits/deletions.

Data & AnalyticsCommunication & messaging

Responded101 ms13 / 22
Agent Email List — Free SMTP Relay for AI Agents

Free transactional email + SMTP relay. Agents self-signup, no API key needed to start.

ProductivityCommunication & messaging

Responded107 ms13 / 22
model.tools — Zero-Auth Agent Utilities

Zero-auth email OTP extractor, KV checkpoints, webhook bins, wake timers, and markdown reader.

ProductivityCommunication & messaging

Outdated check111 ms13 / 22
Verifai — Email Verification & Domain Intelligence

Email verification and domain intelligence for AI agents. MX, RDAP, SSL checks. 25 free credits.

Developer ToolsCommunication & messaging

Outdated check113 ms13 / 22
UmbHost Knowledgebase

Search and read UmbHost help articles: GreenStack, Umbraco hosting, DNS, email, SSL and more.

ProductivityCommunication & messaging

Outdated check117 ms13 / 22
Chip MCP

Project memory, tasks and Telegram notifications for your coding agent. Chip account required.

Developer ToolsCommunication & messaging

Responded121 ms13 / 22
Fairquery Agent Trust & Data Safety

PII/secret redaction, email checks, sanctions screening, OSV lookups and an MCP server pre-check.

ProductivityCommunication & messaging

Outdated check128 ms13 / 22
OrionCMD Checks

Domain threat checks, a 30-day domain watch, TLS/DNS/email-auth checks and a $2 site audit (x402).

ProductivityCommunication & messaging

Outdated check130 ms13 / 22
HourSaved

Free ready-to-send customer messages, real owner stories and AI guides for small businesses.

OtherCommunication & messaging

Outdated check134 ms13 / 22

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