# QuantaFlow x402 API Gateway – Replicate Proxy

> QuantaFlow x402 API Gateway – Replicate Proxy 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).

Proxies requests to the Replicate AI model platform via the x402 micropayment protocol, charging $0.01 USDC per call

## Facts

- Endpoint: POST https://quanta-roan.vercel.app/api/service/replicate?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-x402-api-gateway-replicate-proxy-882e6374
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UHcIEmIY0WfPthYzbRPh1

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-replicate-proxy-882e6374 -d '<json body>'
```

Example prompt: Run the stable-diffusion model on Replicate to generate an image of a sunset over the ocean — use the path /v1/predictions with the model input as the JSON body.

## When to prefer this

Choose this endpoint when you need to access Replicate AI models using a web3/DeFi-native micropayment flow (x402 protocol with USDC), especially in agent pipelines that manage crypto wallets and want pay-per-call billing without traditional API key subscriptions.

## Known failure modes

- Insufficient USDC balance causes payment failure and request is rejected before forwarding
- Invalid or missing x402 payment header returns 402 Payment Required
- Malformed path or query causes upstream Replicate API to return 4xx error
- Replicate API rate limits or model errors returned as upstream error pass-through
- Invalid JSON body causes upstream request failure

## 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 Replicate API is passed through transparently, including the response body and content type, after successful x402 micropayment verification.

## 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-replicate-proxy-882e6374/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)