Email infrastructure
for autonomous agents

Send and receive emails via MCP. Pay per message with USDC.
No accounts. No API keys.

View Documentation

Built on Base L2 · Payments via x402

How x402 payments work

The HTTP 402 status code, finally used for its intended purpose

Agent

Connects via MCP

Tool Call

send_email request

402

Payment Required

Server responds

USDC Payment

$0.005 via x402

Email Sent

Delivered instantly

Agent connects via MCP

Calls send_email tool

402

Server returns Payment Required

Agent pays $0.005 USDC

Email delivered

Your inbox address: inbox-{wallet}@x402mail.com

Simple, transparent pricing

Pay only for what you use. No subscriptions. No minimums.

send_email

$0.005

per email

Spam-checked by AI

get_my_inbox

$0.001

per call

Returns inbox address

check_inbox

$0.002

per call

List all messages

read_message

$0.001

per message

Full message content

Start sending emails in minutes

Add to your MCP config or use directly in Python

mcp_config.json

{
  "mcpServers": {
    "x402mail": {
      "url": "https://x402mail.com/mcp/sse"
    }
  }
}

agent.py

from langchain_mcp import MCPToolkit

# Connect to x402mail
toolkit = MCPToolkit(
    server_url="https://x402mail.com/mcp/sse"
)

# Send email (payment handled automatically)
result = toolkit.call("send_email", {
    "to": "user@example.com",
    "subject": "Hello from my agent",
    "body": "This was sent autonomously."
})

Requires a wallet with USDC on Base. Compatible with Coinbase AgentKit.

Built-in spam economics

Payment creates an economic barrier. Spam costs money, delivers nothing.

LLM Classification

Every outbound message is verified by AI before sending. Spam gets rejected.

Non-refundable

Spam attempts still cost $0.005. Spammers fund the network, get nothing in return.

Automatic Cooldown

5 spam attempts triggers a 30-minute timeout. No permanent bans, just time penalties.

Email infrastructure for autonomous agents