# Agent Email List — Free SMTP Relay for AI Agents (remote · ai.agentemaillist.com)

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

- Trust score: 66/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-21

## Components

- remote · `ai.agentemaillist.com`: 66/100 (this document), [markdown](https://verifymcp.io/servers/com-agentemaillist-ai-free-transactional-email-smtp-relay/ai.md), [page](https://verifymcp.io/servers/com-agentemaillist-ai-free-transactional-email-smtp-relay/ai)

## Channel facts

- Endpoint: `https://ai.agentemaillist.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.2.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-21.

- **Endpoint Security**: 63/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 8 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 78/100
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 775 tokens (~96/item across 8 items; 8 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 20/100
  - Stability observed for 6 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 87/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 62% of tool parameters carry a description.
- **Tool Safety**: 75/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - 0 of 1 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "send_email" implies "send" and declares no destructiveHint at all, which the MCP spec reads as destructive by default.
  - An AI judge read all 9 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

## Install

### How do I install the Agent Email List — Free SMTP Relay for AI Agents MCP server?

Agent Email List — Free SMTP Relay for AI Agents is a hosted endpoint at https://ai.agentemaillist.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http com-agentemaillist-ai-free-transactional-email-s 'https://ai.agentemaillist.com/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "com-agentemaillist-ai-free-transactional-email-s": {
      "url": "https://ai.agentemaillist.com/mcp"
    }
  }
}
```

### VS Code

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

### Codex

```toml
[mcp_servers.com-agentemaillist-ai-free-transactional-email-s]
url = "https://ai.agentemaillist.com/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-agentemaillist-ai-free-transactional-email-s": {
      "type": "remote",
      "url": "https://ai.agentemaillist.com/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-agentemaillist-ai-free-transactional-email-s --url 'https://ai.agentemaillist.com/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-agentemaillist-ai-free-transactional-email-s:
    url: "https://ai.agentemaillist.com/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "com-agentemaillist-ai-free-transactional-email-s": {
      "Transport": "http",
      "Url": "https://ai.agentemaillist.com/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-agentemaillist-ai-free-transactional-email-s -t streamable-http -u 'https://ai.agentemaillist.com/mcp'
```

### Other

```json
{
  "mcpServers": {
    "com-agentemaillist-ai-free-transactional-email-s": {
      "type": "http",
      "url": "https://ai.agentemaillist.com/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-21 (score 66, +1)

No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-18 (score 65, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-16 (score 64, +1)

- [functional improvement] Stability: unverified → 0.03

### 2026-09-15 (score 63)

First indexed and scored.

## MCP tools (8)

### `create_account` (~101 tokens)

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.

Input parameters:

- `email` (string, required): A contact address for the account.
- `name` (string): Optional display name.
- `password` (string, required): At least 12 characters. Needed only to sign in to the web console.

### `list_domains` (~31 tokens)

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

### `add_domain` (~79 tokens)

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.

Input parameters:

- `name` (string, required): A bare domain such as mail.yourcompany.com. A subdomain is better than the root.

### `verify_domain` (~53 tokens)

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.

Input parameters:

- `name` (string, required)

### `send_email` (~150 tokens)

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.

Input parameters:

- `domain` (string, required): The verified domain to send from.
- `from` (string, required): An address at that domain.
- `html` (string): Optional HTML body.
- `subject` (string)
- `test_mode` (boolean): Accept and screen the message but send nothing. Defaults to false.
- `text` (string): Plain text body.
- `to` (string, required): One address, or several separated by commas.

### `get_sending_limits` (~105 tokens)

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.

Input parameters:

- `domain` (string): Optional. Omit for account limits without a domain's allowance.

### `list_messages` (~71 tokens)

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

Input parameters:

- `direction` (string)
- `domain` (string, required)
- `folder` (string)
- `limit` (integer): Up to 100. Defaults to 25.

### `get_delivery_events` (~84 tokens)

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.

Input parameters:

- `domain` (string, required)
- `event` (string): Filter to one type, such as delivered or failed.
- `limit` (integer)
- `recipient` (string)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-agentemaillist-ai-free-transactional-email-smtp-relay/ai#diagnostics

## Score history

- 2026-09-21: 66
- 2026-09-20: 65
- 2026-09-19: 65
- 2026-09-18: 65
- 2026-09-17: 64
- 2026-09-16: 64
- 2026-09-15: 63

## Common questions

### What is the Agent Email List — Free SMTP Relay for AI Agents MCP server?

Agent Email List — Free SMTP Relay for AI Agents is an MCP server listed in the public MCP registry as com.agentemaillist.ai/free-transactional-email-smtp-relay. Free transactional email + SMTP relay. Agents self-signup, no API key needed to start. This page covers its hosted endpoint (https://ai.agentemaillist.com/mcp).

### Is the Agent Email List — Free SMTP Relay for AI Agents MCP server safe to use?

Agent Email List — Free SMTP Relay for AI Agents scores 66 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Agent Email List — Free SMTP Relay for AI Agents MCP server expose?

Agent Email List — Free SMTP Relay for AI Agents exposes 8 tools: create_account, list_domains, add_domain, verify_domain, send_email, and 3 more. Their descriptions and schemas cost roughly 674 tokens of context every time the server is loaded.

### Does the Agent Email List — Free SMTP Relay for AI Agents MCP server require authentication?

No. We connected to Agent Email List — Free SMTP Relay for AI Agents without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Agent Email List — Free SMTP Relay for AI Agents MCP server still maintained?

Agent Email List — Free SMTP Relay for AI Agents is still listed as active in the MCP registry. We last reached this channel on 21 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://ai.agentemaillist.com/mcp
- Repository: https://github.com/lbesecker195/AI-Agent-Email-List
- Website: https://ai.agentemaillist.com/
- Changelog RSS feed: https://verifymcp.io/servers/com-agentemaillist-ai-free-transactional-email-smtp-relay/ai.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-agentemaillist-ai-free-transactional-email-smtp-relay/ai.json
- HTML version of this page: https://verifymcp.io/servers/com-agentemaillist-ai-free-transactional-email-smtp-relay/ai