Agent Email List — Free SMTP Relay for AI Agents MCP Server

by agentemaillist-ai Your server? Claim it

answering

Agent Email List — Free SMTP Relay for AI Agents is answering right now. Last checked 3 min ago. It exposes 8 tools. Last commit 18 Sep 2026.

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

Uptime history 48 days of history · worst day 98%

48 days agonow

100.0%

Uptime 24h

92 of 92 checks

Tools

read from the server

175 ms

Response time

average over 24h

Stars

last commit 18 Sep 2026

What the code does

We read the source, 4 d ago · tools taken from the live server · rules 995398eba69f

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Builds a database query by concatenation lib/email_provider/delivery/queue.ex:130, lib/email_provider/warmup.ex:214

  # read it as, or the update matches nothing and someone else has it.
  defp claim(%Message{} = message) do

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 3 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

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

Settings → Connectors → Add custom connector, then paste this address

https://ai.agentemaillist.com/mcp

~/.codex/config.toml

[mcp_servers.free-transactional-email-smtp-relay]
url = "https://ai.agentemaillist.com/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "free-transactional-email-smtp-relay": {
      "url": "https://ai.agentemaillist.com/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "free-transactional-email-smtp-relay": {
      "type": "http",
      "url": "https://ai.agentemaillist.com/mcp"
    }
  }
}

Available tools 8

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

account

create_account

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.

delivery

get_delivery_events

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.

domain

add_domain

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.

domains

list_domains

List the sending domains on this account, with their verification state and how much of today's sending allowance each has left.

messages

list_messages

Recent messages for a domain, sent and received. Use direction to filter, and folder to separate inbox from spam on received mail.

send

send_email

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.

sending

get_sending_limits

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.

verify

verify_domain

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.

Endpoints

URL	Transport	State	Latency	Checked
https://ai.agentemaillist.com/mcp	streamable-http	answering	150 ms	3 min ago

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Agent Email List — Free SMTP Relay for AI Agents — questions

Answers built from our own checks of this server.

What can Agent Email List — Free SMTP Relay for AI Agents do?

It exposes 8 tools, read directly from the server on our last check. Among them: add_domain, create_account, get_delivery_events, get_sending_limits, list_domains, list_messages and 2 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Agent Email List — Free SMTP Relay for AI Agents working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 175 ms. The bar chart above shows every period we have measured.

How do I connect Agent Email List — Free SMTP Relay for AI Agents?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Agent Email List — Free SMTP Relay for AI Agents need an API key?

No. Agent Email List — Free SMTP Relay for AI Agents completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 8 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Agent Email List — Free SMTP Relay for AI Agents?

It answers our handshake in 175 ms on average, which is faster than 77% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is Agent Email List — Free SMTP Relay for AI Agents open source?

We cannot say either way: written in Elixir and 1 stars on GitHub, but we could not determine the licence, and without one the code is not open source by default.