# httpay.xyz SendGrid Email Delivery Gateway

> httpay.xyz SendGrid Email Delivery Gateway is a paid API for AI agents from httpay.xyz, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Proxies requests to the SendGrid email delivery API, enabling transactional and marketing email sending via a pay-per-call gateway

## Facts

- Endpoint: POST https://httpay.xyz/api/gateway/sendgrid/%7B*path%7D/*
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/httpay-xyz-f0817ce8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4scUMk-hC0frQMag7ZvY0

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability httpay-xyz-f0817ce8 -d '<json body>'
```

Example prompt: Send a transactional email via SendGrid to user@example.com from noreply@myapp.com with subject 'Your order has shipped' and body 'Your order #12345 is on its way and will arrive in 3-5 business days.'

## When to prefer this

Choose this endpoint when you need to send emails via the SendGrid API without managing your own SendGrid API key or billing, paying only per call via crypto micropayment. Ideal for agentic workflows that occasionally send transactional emails and want a lightweight, no-subscription path to SendGrid's full API surface.

## Known failure modes

- Invalid recipient email address returns 400 bad request from SendGrid
- Missing required fields (to, from, subject) returns validation error
- SendGrid API path not found returns 404
- Payment of 0.001 USDC not fulfilled returns 402 Payment Required
- Rate limiting or SendGrid account suspension returns 429 or 403
- Malformed request body causes SendGrid to reject with 400

## How this service works

API Gateway: SendGrid email delivery API

## Output

Returns the SendGrid API response for the given path, including delivery status, message ID, and any error details returned by SendGrid for the submitted email request.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/httpay-xyz-f0817ce8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from httpay.xyz](https://www.zero.xyz/host/httpay.xyz/llms.txt)