# QuantaFlow Abstract Email Service (x402)

> QuantaFlow Abstract Email Service (x402) is a paid API for AI agents from quanta-roan.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-10).

Provides abstract email functionality via a pay-per-call x402 protocol gateway at $0.01 USDC per request.

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/abstract-email?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantaflow-abstract-email-service-x402-87e9c19c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UV97tOadmwkAzUN-IDYuq

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 quantaflow-abstract-email-service-x402-87e9c19c -d '<json body>'
```

Example prompt: Send an email using QuantaFlow's abstract-email service — the body should say 'Your invoice is ready, please review it at your earliest convenience' and route it through the default path.

## When to prefer this

Choose this endpoint when your AI agent or web3 application needs to send email as part of an automated workflow and requires pay-per-use micropayment billing via the x402 protocol with USDC, rather than maintaining a subscription-based email service account.

## Known failure modes

- Payment insufficient or x402 payment header missing — returns 402 Payment Required
- Invalid or missing body field — upstream may reject malformed email payload
- Path misconfigured — upstream origin not reachable, returns 502 or 404
- Rate limiting by upstream email provider
- Malformed query object causes routing failure

## How this service works

Every request, a quantum of value. x402 protocol-based payment endpoint for web3/DeFi tools.

## Output

The upstream response body and content type are passed through after successful x402 payment validation. Typically confirms whether the email was dispatched or returns a status from the underlying email provider.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "body": {
   "type": "string",
   "description": "Optional JSON body forwarded to POST requests."
  },
  "path": {
   "type": "string",
   "description": "Path below the selected upstream origin."
  },
  "query": {
   "type": "object"
  },
  "method": {
   "enum": [
    "GET",
    "POST"
   ],
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "description": "The upstream response body and content type are passed through after successful payment."
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/quantaflow-abstract-email-service-x402-87e9c19c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from quanta-roan.vercel.app](https://www.zero.xyz/host/quanta-roan.vercel.app/llms.txt)