# QuantaFlow x402 API Gateway – Rapid Barcodes

> QuantaFlow x402 API Gateway – Rapid Barcodes is a paid API for AI agents from quanta-roan.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).

Generates barcodes via a pay-per-call x402 micropayment gateway, proxying requests to an upstream barcode service for $0.01 USDC per call.

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/rapid-barcodes1?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quantaflow-x402-api-gateway-rapid-barcodes-20b6ca58
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EyLk9PmwvduDx0A1Zbeux

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-x402-api-gateway-rapid-barcodes-20b6ca58 -d '<json body>'
```

Example prompt: Generate a Code 128 barcode for the product SKU 'ABC-98765' — I need the barcode image back so I can put it on a shipping label.

## When to prefer this

Choose this endpoint when you need on-demand barcode generation with crypto micropayment billing (x402/USDC) and want a pay-per-call model without API key subscription overhead. It is especially useful in Web3-native agent workflows where USDC payments are already integrated.

## Known failure modes

- Insufficient USDC balance or failed x402 payment results in 402 Payment Required
- Invalid barcode format or malformed input body returns upstream error
- Upstream Rapid Barcodes service unavailable causes gateway timeout or 502
- Unsupported barcode type requested returns upstream validation error
- Missing required path or body parameters results in a 400 Bad Request

## How this service works

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

## Output

The raw upstream response from the Rapid Barcodes service — typically a barcode image (e.g. PNG or SVG) with the appropriate content-type header passed through after successful x402 micropayment processing.

## 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-x402-api-gateway-rapid-barcodes-20b6ca58/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)