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
SMS Everyone MCP by usefulapi

Send confirmed SMS, check credits, delivery and replies, and manage opt-outs with SMS Everyone.

ProductivityCommunication & messaging

Outdated check139 ms14 / 22
TextUs MCP by usefulapi

Read texts, contacts, campaigns and opt-outs; send SMS, add contacts and notes in TextUs.

ProductivityCommunication & messaging

Outdated check140 ms14 / 22
Domain Trust Check (DNS, Email Auth, TLS, Headers)

Check a domain's DNS, SPF/DMARC and TLS before trusting it. $0.003/call via x402.

Developer ToolsCommunication & messaging

Responded142 ms14 / 22
Fieldwright

Fieldwright: web page to clean Markdown, metadata, JSON-LD, emails, phones.

Developer ToolsCommunication & messaging

Responded142 ms14 / 22
DreamAgent

Build and deploy websites, Telegram and Discord bots from chat via the DreamAgent platform.

Developer ToolsCommunication & messaging

Responded143 ms14 / 22
fnlowl

Read and manage fnlowl widgets, leads, email sequences and analytics from an AI assistant.

Marketing & SalesCommunication & messaging

Responded145 ms14 / 22
Bird MCP by usefulapi

Read SMS, WhatsApp, email, contacts and audiences from your Bird workspace, plus safe CRM writes.

ProductivityCommunication & messaging

Outdated check150 ms14 / 22
Africa's Talking MCP by usefulapi

Read Africa's Talking balance, incoming SMS, transactions; send SMS, airtime, data and voice calls.

ProductivityCommunication & messaging

Outdated check150 ms14 / 22
SimpleTexting MCP by usefulapi

Send SMS/MMS, manage contacts, and read campaigns, messages and media on SimpleTexting.

Marketing & SalesCommunication & messaging

Outdated check151 ms14 / 22
io.github.leshchenko1979/fast-mcp-telegram

Multi-tenant Telegram gateway for AI agents — HTTP+stdio, 8 tools, MTProto User API

Real Estate & PropertyCommunication & messaging

Outdated check169 ms14 / 22
Email Address Check (syntax, MX, disposable, SPF/DMARC)

Check email addresses for syntax, MX and disposable domains. $0.0015/call via x402.

Developer ToolsCommunication & messaging

Responded171 ms14 / 22
Dataset Cleaner & Exporter

Dedupe, flatten and clean messy JSON rows (emails, phones, URLs, HTML) in one call, as JSON or CSV.

Developer ToolsCommunication & messaging

Responded176 ms14 / 22
Hail

Phone, SMS and email for AI agents. One remote MCP endpoint, OAuth login, zero install.

ProductivityCommunication & messaging

Responded199 ms14 / 22
Benchmark Email MCP by usefulapi

Manage Benchmark Email lists and contacts, and read campaign reports: opens, clicks, bounces.

Marketing & SalesCommunication & messaging

Outdated check211 ms14 / 22
AiSensy MCP by usefulapi

Read AiSensy contacts, templates and campaigns; add contacts, send WhatsApp messages on approval.

Marketing & SalesCommunication & messaging

Outdated check215 ms14 / 22
Contact Details Finder

Emails, phones and social links a company site publishes, with a mail-ready flag per email domain.

ProductivityCommunication & messaging

Responded248 ms14 / 22
Hostaway MCP by usefulapi

Manage Hostaway listings, reservations, calendar, guest messages, reviews and tasks.

ProductivityCommunication & messaging

Outdated check251 ms14 / 22
E-Commerce Store Enricher

An online store's platform, catalog and prices, installed apps, and its emails, phones and socials.

E-commerceCommunication & messaging

Responded274 ms14 / 22
Emailchef MCP by usefulapi

Read lists, contacts, campaign stats; add contacts; draft, schedule and send campaigns and SMS.

Marketing & SalesCommunication & messaging

Outdated check280 ms14 / 22
Domain Mail Check

Check a domain's email DNS, whether Gmail and Outlook accept its mail, and its registration.

ProductivityCommunication & messaging

Responded291 ms14 / 22
Scoutee

Tender search + AI CPV finder. Register free: 1 daily email alert, up to 20 results/search.

ProductivityCommunication & messaging

Outdated check292 ms14 / 22
ContrastAPI

55 tools, 7 Resources, Sigma rules, email SPF/DMARC, MITRE, CVE/KEV, risk_score. No key.

ProductivityCommunication & messaging

Responded303 ms14 / 22
Email Engagement Report

Email Engagement Report turns a raw email event export into a per-recipient engagement report.

ProductivityCommunication & messaging

Responded311 ms14 / 22
io.github.serg-tanichev/email-spam-tester

Test an email before it goes out: a disposable address, 41 checks with RFC citations, a fix plan.

Developer ToolsCommunication & messaging

Responded319 ms14 / 22

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