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klymax402 Email Send API
x402
klymax402 Email Send API is a paid API for AI agents from klymax402.com, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-14).
Sends a transactional email to a specified recipient with a custom subject and body (plain text or HTML) via a pay-per-call x402 endpoint.
Price / call$0.008
Success—
StatusUnknown
How this service works
One MCP endpoint gives your AI agent access to 100 APIs -- crypto, DeFi, web, AI, finance and utilities. No API keys, USDC on Base from $0.003/call.
Output
Returns a JSON object confirming delivery with fields including: messageId (unique ID for the sent message), status (delivery status), to (recipient), from (sender), subject, timestamp, bodyLength (character count of the body), contentType (text/plain or text/html), and mode.
Example use cases
Agent alert notification
“Email alerts@myteam.com with subject 'Critical alert: service down' and body 'Our payment processor has been unreachable for 10 minutes — please investigate immediately.'”
User onboarding welcome email
“Send a welcome email to newuser@gmail.com with subject 'Welcome to our platform!' and an HTML body that says '<h1>Welcome!</h1><p>We're thrilled to have you. Click below to get started.</p>'”
Automated report delivery
“Email the weekly sales summary to boss@company.com — subject line 'Weekly Sales Summary', body 'Total sales this week: $42,300. Top product: Widget Pro. See dashboard for details.'”
Technical details
Endpoint
GEThttps://klymax402.com/api/email-send/api/sendWhen to prefer
Choose this endpoint when an AI agent needs to send a transactional or notification email on a pay-per-call basis without requiring pre-configured API keys or an email service account. It is especially useful in agentic workflows where email delivery is an occasional side-effect action (e.g. alerting a user, delivering a report) and where the x402 micropayment model fits the billing context. Prefer alternatives like SendGrid or Mailgun if you need bulk sending, templates, or analytics dashboards.
Side effects
- Invalid recipient email address format — delivery fails or bounces
- Missing required fields (to, subject, body/html) — API returns error
- Sender address override rejected if domain not authorized
- Payment failure if insufficient USDC balance — 402 response returned
- Rate limiting or spam filtering by downstream email provider
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| to | string | Recipient email address |
| body | string | Email body content (plain text) |
| from | string | Sender email address (default: noreply@x402.dev) |
| html | string | Email body content (HTML, optional — overrides body) |
| subject | string | Email subject line |
Output
Schema · Response
{
"type": "json",
"example": {
"to": "example",
"from": "example",
"mode": "example",
"status": "example",
"subject": "example",
"messageId": "example",
"timestamp": "example",
"bodyLength": 1,
"contentType": "example"
}
}Tags
x402
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