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Agent Email List — Free SMTP Relay for AI Agents

by ai.agentemaillist.com · remote · no sign-in to list tools · v0.2.0 · published by com.agentemaillist.ai

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

Final · 1Changes · 3
CompareRegistry entry

8 tools: 1 do something that can't be undone, 3 change things and 4 only read.

Scanned Oct 21, 2026

1 check matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http free-transactional-email-smtp-relay https://ai.agentemaillist.com/mcp

Findings

Matches of fixed checks, with the text they matched.

1 info

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

8 tools

Can't be undone 1Claude Code: ask
  • send_emailSend a message.No findings

    Why it is in this group

    • The name "send_email" says "send": a word for sending, and what is sent cannot be taken back.
    • The input addresses people (input.to): what it sends cannot be taken back.
    Description, as the server wrote it
    Send a message. The domain must be verified and the from address must belong to it. Counts one against the daily allowance per recipient. Set test_mode true to run the whole pipeline, including content screening, without sending anything and without spending allowance — do that first when building.
Changes things 3Claude Code: ask
  • add_domainRegister a domain to send from, and get the DNS records that must be published before it will work.No findings

    Why it is in this group

    • The name "add_domain" says "add": a word for a change.
    Description, as the server wrote it
    Register a domain to send from, and get the DNS records that must be published before it will work. Publishing DNS usually needs a human with registrar access, so start this early. The domain cannot send until verify_domain succeeds.
  • create_accountCreate an account on this email service and get an API key back.1 finding

    Why it is in this group

    • The name "create_account" says "create": a word for a change.

    Findings

    • Info

      The description mentions "credentials".

      Matched text

      description: "...get an API key back. Needs no existing credentials, so an agent with nothing can call this..."

      What this check looks for
    Description, as the server wrote it
    Create an account on this email service and get an API key back. Needs no existing credentials, so an agent with nothing can call this first. The key is returned once and never again. Free, with no card and no trial clock.
  • verify_domainRe-read DNS now and mark the domain active if its SPF and DKIM records are visible.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Re-read DNS now and mark the domain active if its SPF and DKIM records are visible. DNS takes minutes to hours to propagate; poll this every few minutes, not every few seconds.
Only reads 4Claude Code: allow
  • get_delivery_eventsWhat happened to messages on this domain: accepted, delivered, failed, and so on.No findings

    Why it is in this group

    • The name "get_delivery_events" says "get": a word for reading.
    Description, as the server wrote it
    What happened to messages on this domain: accepted, delivered, failed, and so on. A send returning success means queued, not delivered; this is where the delivery outcome actually appears.
  • get_sending_limitsHow much this domain may send today and what graduates it to the next rung, plus this account's standing: how many domains it may hold and whether sending is paused.No findings

    Why it is in this group

    • The name "get_sending_limits" says "get": a word for reading.
    Description, as the server wrote it
    How much this domain may send today and what graduates it to the next rung, plus this account's standing: how many domains it may hold and whether sending is paused. New domains start at a low daily cap and climb as they prove themselves, so check this before planning a bulk send rather than discovering it part-way. Call it with no domain for the account-level answer alone.
  • list_domainsList the sending domains on this account, with their verification state and how much of today's sending allowance each has left.No findings

    Why it is in this group

    • The name "list_domains" says "list": a word for reading.
    Description, as the server wrote it
    List the sending domains on this account, with their verification state and how much of today's sending allowance each has left.
  • list_messagesRecent messages for a domain, sent and received.No findings

    Why it is in this group

    • The name "list_messages" says "list": a word for reading.
    Description, as the server wrote it
    Recent messages for a domain, sent and received. Use direction to filter, and folder to separate inbox from spam on received mail.

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 0.2.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http free-transactional-email-smtp-relay https://ai.agentemaillist.com/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__free-transactional-email-smtp-relay__list_domains",
      "mcp__free-transactional-email-smtp-relay__get_sending_limits",
      "mcp__free-transactional-email-smtp-relay__list_messages",
      "mcp__free-transactional-email-smtp-relay__get_delivery_events"
    ],
    "ask": [
      "mcp__free-transactional-email-smtp-relay__create_account",
      "mcp__free-transactional-email-smtp-relay__add_domain",
      "mcp__free-transactional-email-smtp-relay__verify_domain",
      "mcp__free-transactional-email-smtp-relay__send_email"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as free-transactional-email-smtp-relay. Review it before you use it.