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

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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
Confirme, by Synapse

Did it really happen? Independent signed receipts for AI agents: page, domain, email, heartbeat.

ProductivityCommunication & messaging

Responded339 ms14 / 22
io.github.conquext/neuron

AI-powered WhatsApp chatbot platform with 196 tools for bots, campaigns, and contacts.

Marketing & SalesCommunication & messaging

Responded407 ms14 / 22
CosVoice

A real phone number and email for your AI Chief of Staff. Calls, bookings by phone, summaries.

ProductivityCommunication & messaging

Responded430 ms14 / 22
netsi

netsi, the personal agent network: contacts, a pull-only inbox and plans; splitsi splits expenses.

Developer ToolsCommunication & messaging

Responded435 ms14 / 22
Surfing Dog Inbox

Message, ask for a quote or book a call with Surfing Dog, through its open-source inbox.

ProductivityCommunication & messaging

Responded446 ms14 / 22
com.somosvelora/velora

Hosted Argentine commerce MCP: real AFIP invoicing, MercadoPago, logistics, catalog & WhatsApp.

Developer ToolsCommunication & messaging

Outdated check492 ms14 / 22
Penniless Data Utilities

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

Finance & CryptoCommunication & messaging

Responded513 ms14 / 22
Farrukh Inomov

Farrukh Inomov's portfolio: profile, experience, projects, blog, messages and intro calls.

OtherCommunication & messaging

Outdated check537 ms14 / 22
AgentDiet A2A Indirect Prompt-Injection & Jailbreak Firewall

Scans untrusted web pages, emails, MCP responses, or A2A payloads for hidden prompt injections an.

ProductivityCommunication & messaging

Responded562 ms14 / 22
Shortlist Price Index

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

Developer ToolsCommunication & messaging

Responded574 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

Responded588 ms14 / 22
Sakari MCP by usefulapi

Manage Sakari SMS contacts, conversations, templates and campaigns, and send texts.

Marketing & SalesCommunication & messaging

Outdated check603 ms14 / 22
AnyHook

A webhook inbox for agents: one call returns a live URL. Mock, verify, inspect and replay.

ProductivityCommunication & messaging

Outdated check609 ms14 / 22
AgentDiet B2B Company, Tech Stack & Contact Lead Enrichment

Extracts verified emails, social links, 40+ tech stack signals, pricing tiers, and company summar.

ProductivityCommunication & messaging

Responded611 ms14 / 22
SMS and WhatsApp Messaging

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

ProductivityCommunication & messaging

Responded618 ms14 / 22
Voicescape — on-chain identity and tipping for AI agents

67 tools: agent blockpages, onboarding, messaging + hire loop on Hedera. Server never holds keys.

Finance & CryptoCommunication & messaging

Responded632 ms14 / 22
ExpenseBot

Receipt ingestion, Gmail capture, expense analysis, and reviewed reports for AI-agent workflows.

Developer ToolsCommunication & messaging

Outdated check789 ms14 / 22
Fursat

AI-bookable curated vacation homes in Northeast India and the Himalayas. Book on WhatsApp.

TravelCommunication & messaging

Responded850 ms14 / 22
com.commsharbor/commsharbor

Managed domain email without running a mail stack. Free DNS checks; monthly mailbox packages.

ProductivityCommunication & messaging

Outdated check905 ms14 / 22
Sorzio

B2B web & LinkedIn enrichment, email verification, ICP scoring & AI copy for up to 25,000 leads.

Marketing & SalesCommunication & messaging

Responded919 ms14 / 22
com.makehybrid/mcp

LinkedIn, the messaging channels and the work trackers of a MakeHybrid account, as tools.

Developer ToolsCommunication & messaging

Outdated check1309 ms14 / 22
drwho.me network and developer tools

29 free tools: DNS, email auth (SPF, DKIM, DMARC), TLS, headers, WHOIS, dev utils.

ProductivityCommunication & messaging

Outdated check1407 ms14 / 22
viaSocket

Use your apps from your AI: Gmail, Slack, Google Sheets, HubSpot and 2,300+ more on your accounts.

ProductivityCommunication & messaging

Responded2544 ms14 / 22
io.github.shashwatgtm/impact-mcp

IMPACT: 8 B2B positioning and messaging tools by Helix GTM Consulting

Developer ToolsCommunication & messaging

Outdated check3051 ms14 / 22

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