Remote Servers

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

L

letterport

letterport.dev

Real email inboxes for AI agents: create addresses, read mail as JSON, reply in threads

Is a phone number VoIP or a real carrier line? Line type, score and grade, free, no auth

Cron jobs with retries, webhook relay, HTML-to-PDF, and transactional email for your app

P

PaperAgent — Send Physical Mail

paperagent.dev

Mail one-off USPS letters from ChatGPT or Claude after you approve the preview and price. US only

P

pokes

pokes.dev

Poke your human for approvals and decisions during agent sessions — answered with one phone tap.

E

email

primitive.dev

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

Reach your own phone from an AI agent: notifications, approval questions, reminders, ring, files

Shared channels where agents from different vendors collaborate over a relayed message log

Prepaid SMS OTP and transactional SMS API. Eight priced markets: NG, GH, KE, ZA, GB, BJ, CI, US

Email, WhatsApp and Telegram for AI agents: send, campaigns, automations, contacts, agent inboxes

Email inboxes for agents by the hour: wait for a mail, get the code or link. Pay per call.

Send push to Android, iOS and the web, and ask a trusted phone to approve a login, from your agent

Tenant-scoped control plane over the TeleQuick platform's full API surface

Message someone through your coding agent. Their agent gets your note and explains it.

Coordination hub for AI coding agents: message teammates, ask humans, audit every event

Let your agent handle your email, on your terms. Reads what you allow, replies with your OK

Checks if an email/domain is disposable (temp-mail). x402-metered per call.

M

Mailvett: Email Validation API for AI Agents

cybermax.cybermax-tools.workers.dev

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

L

Letterkeel: Send Email via SMTP, Resend, SendGrid & Mailgun

cybermax.cybermax-tools.workers.dev

Letterkeel: send email from your own domain via SMTP, Resend, SendGrid, Mailgun, Postmark

Audit SPF, DKIM, DMARC, MX, BIMI, MTA-STS for a domain; score + grade. $0.003 USDC/call via x402

Email verification for AI agents: syntax, MX, disposable, role, score. $0.001 USDC/call via x402

D

DnsGuard

dnsguard.mike-tusa.workers.dev

Check a domain's email authentication: SPF, DKIM, DMARC, BIMI, MX, MTA-STS, TLS-RPT. Score + fixes.

M

MailAlign

mailalign.mike-tusa.workers.dev

Email header analyzer: SPF/DKIM/DMARC/ARC verdicts, domain alignment, hop delays. No lookups

Find a time a group can meet: no-login availability poll that picks the best meeting slot

A public meeting place for agents to exchange reviews and coordinate work

SPF, DKIM, DMARC, MTA-STS and domain-expiry checks for any domain, with SPF lookup counts

A

AI-operated. DKIM key reader: free, no key, finds unknown selectors.

ai.rjhsignaltech.workers.dev

AI-operated. Free DKIM key reader: no key needed, finds unknown selectors

A

AI-operated. Email authentication reader: six free tools, no key, no signup.

ai.rjhsignaltech.workers.dev

AI-operated. All tools paid: an unpaid tools/call answers HTTP 402 with x402 terms, USDC on Base

Create and manage DialNexa AI voice agents, campaigns, calls, phone numbers, workflows, and more.

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Eigi.ai Voice Agents

eigi-ai

Create and manage AI voice agents, real-time conversations, and analytics with eigi.ai

Branded email on your own domain: send, reply, search, aliases, contacts and campaigns.

F

fixture.email — Email Testing for Agents

fixture.email

Disposable test mailboxes on a real domain: send, receive and assert on real email.

Create and manage Templated email templates from any MCP client - bring your own model.

Bring your own AI into group chats with your friends and their AIs. AndCo only carries messages

Verify email deliverability by SMTP. Catch-all/disposable/role detection. EU-hosted, GDPR-ready.

H

Help by DeltaBreen

deltabreen.eu

Work your Help tickets with your AI: read them, reply or leave notes, and set up forms and sites

N

NordicMCP — Google Mail

nordicmcp.eu

Hosted Gmail MCP server: read, search and manage messages. Google OAuth2 handled by NordicMCP

Create and manage website chatbots for European SMBs: bots, chat, and captured leads

Multi-channel voice and SMS gateway interface for AI communication

Premium agentic endpoint for agent-phone-mcp.

Premium agentic endpoint for agent-telephony-mcp.

Premium agentic endpoint for agentphone-ai-mcp.

Premium agentic endpoint for cell-tower-handoff-mcp.

Corporate email and chat thread summarization parser.

Premium agentic endpoint for docdigest-mcp.

E

Email Validator (MX, Disposable, Typo)

fairquery

Validate emails without sending mail: syntax, MX, disposable, role and typo checks, SPF/DMARC.

D

defigent

Firrton

Agent messaging inbox (A2A, EIP-712 signed), ERC-8004 directory, status and text hashing for Monad.

C

Comontel : forfaits mobiles pro sur le réseau Orange

comontel.fr

Business mobile plans on the Orange network: prices, roaming in Europe and Switzerland, FAQ. Read-only.

F

Flytel

flytel.fr

Flytel mobile plans for France-Switzerland cross-border commuters: offers, calls, data, countries

Create, configure and manage an AI phone receptionist. Requires a Fonixia account

S

SignaMail

signamail.fr

Email signatures for French businesses: HTML generator, legal mentions per job, SPF/DKIM/DMARC

A

AgentPub

FrankShen18

Agent-to-agent messaging: directory, public lobby, DMs, channels, search. Stateless MCP + REST.

Search connected email, read and manage messages, draft and send, and manage rules for new mail

Manage authorized Rafi leads, reminders, DNC status, and AI voice playbooks

AI calls to South Korean numbers (+82), with results and transcripts. Korean numbers only. Account and OAuth required

C

clippy

IDTitanium

AI agents can Create rooms and store/retrieve text and images, and hand link to humans no sign-up

Send SMS and manage contacts in Israel: delivery status, opt-outs, segments, and credits.

WhatsApp (Web + Business API), SMS, contacts, and call records via 2Chat's MCP server

CRM, inbox, meetings, revenue intelligence, analytics and automations for AI agents