Agent Email List — Free SMTP Relay for AI Agents is a remote MCP server that gives an AI agent 8 tools, among them add_domain, create_account, get_delivery_events. It answers at https://ai.agentemaillist.com/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 4 of 4 times since 15 September 2026; the last check, on 19 October 2026, succeeded.
Free transactional email + SMTP relay. Agents self-signup, no API key needed to start.
Description as the publisher wrote it.
| Tool | What it does |
|---|---|
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. Inputs: name |
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. Inputs: name, password, email |
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. Inputs: domain, limit, event, recipient |
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, s Inputs: domain |
list_domains | List the sending domains on this account, with their verification state and how much of today's sending allowance each has left. |
list_messages | Recent messages for a domain, sent and received. Use direction to filter, and folder to separate inbox from spam on received mail. Inputs: domain, limit, direction, folder |
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 an Inputs: domain, text, from, to, html, subject |
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. Inputs: name |
Every block below points at https://ai.agentemaillist.com/mcp. Pick your client and copy.
claude mcp add --transport http agent-email-list-free-smtp-relay https://ai.agentemaillist.com/mcp
{
"mcpServers": {
"agent-email-list-free-smtp-relay": {
"command": "npx",
"args": ["-y", "mcp-remote", "https://ai.agentemaillist.com/mcp"]
}
}
}{
"mcpServers": {
"agent-email-list-free-smtp-relay": {
"url": "https://ai.agentemaillist.com/mcp"
}
}
}{
"servers": {
"agent-email-list-free-smtp-relay": {
"type": "http",
"url": "https://ai.agentemaillist.com/mcp"
}
}
}{
"context_servers": {
"agent-email-list-free-smtp-relay": {
"url": "https://ai.agentemaillist.com/mcp"
}
}
}{
"mcpServers": {
"agent-email-list-free-smtp-relay": {
"serverUrl": "https://ai.agentemaillist.com/mcp"
}
}
}{
"mcpServers": {
"agent-email-list-free-smtp-relay": {
"url": "https://ai.agentemaillist.com/mcp"
}
}
}name: Agent Email List — Free SMTP Relay for AI Agents
version: 0.0.1
schema: v1
mcpServers:
- name: Agent Email List — Free SMTP Relay for AI Agents
type: streamable-http
url: https://ai.agentemaillist.com/mcp{
"mcpServers": {
"agent-email-list-free-smtp-relay": {
"httpUrl": "https://ai.agentemaillist.com/mcp"
}
}
}{
"mcpServers": {
"agent-email-list-free-smtp-relay": {
"type": "http",
"url": "https://ai.agentemaillist.com/mcp"
}
}
}{
"mcpServers": {
"agent-email-list-free-smtp-relay": {
"url": "https://ai.agentemaillist.com/mcp"
}
}
}goose://extension?url=https%3A%2F%2Fai.agentemaillist.com%2Fmcp&type=streamable_http&id=agent-email-list-free-smtp-relay&name=Agent%20Email%20List%20%E2%80%94%20Free%20SMTP%20Relay%20for%20AI%20Agents
It answered our last check on 19 October 2026 in 92 ms. Over 4 checks since 15 September 2026 it answered 4. Status here comes from Neuronto's own probes, not from the publisher.
Yes. It is published by agentemaillist.com and served from ai.agentemaillist.com, the vendor's own domain: https://ai.agentemaillist.com/mcp.
8, as returned by the server's own tools/list on 24 September 2026: add_domain, create_account, get_delivery_events, get_sending_limits, list_domains, list_messages, send_email, verify_domain.
It answered our last check on 19 October 2026 in 92 ms. Over 4 checks since 15 September 2026 it answered 4.
Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://ai.agentemaillist.com/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.
It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.
Publisher: com.agentemaillist.ai. Endpoint host: ai.agentemaillist.com. ARD identifier: urn:air:com.agentemaillist.ai:mcp:free-transactional-email-smtp-relay.
First indexed 15 September 2026. The tools are exactly what the server returned; nothing on this page
is inferred from its name. Ranking in Neuronto search is never for sale.