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QuantaFlow x402 API Gateway – Stability Endpoint
x402
QuantaFlow x402 API Gateway – Stability Endpoint is a paid API for AI agents from quanta-roan.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-16).
Proxies requests to a stability-related upstream service (likely Stability AI image generation) via the x402 micropayment protocol, charging $0.01 USDC per call.
Price / call$0.01
Success—
StatusUnknown
How this service works
Every request, a quantum of value. x402 protocol-based payment endpoint for web3/DeFi tools.
Output
The raw upstream response body from Stability AI (or whichever stability service is upstream), passed through transparently along with its content type, after the x402 micropayment of $0.01 USDC has been successfully processed.
Example use cases
Pay-per-call AI image generation
“I want to generate a photorealistic image of a futuristic city skyline at night using Stability AI — use the QuantaFlow x402 gateway at the stability endpoint, forward my prompt as the body, and handle the USDC micropayment automatically.”
Web3-native creative asset pipeline
“For my NFT project, generate a series of AI images via the QuantaFlow stability endpoint — each call should go to the /v1/generation path with my prompt JSON and pay $0.01 USDC per image using the x402 protocol.”
Agent-driven image generation with crypto billing
“My AI agent needs to call the Stability AI image API without a traditional API key — use the QuantaFlow x402 gateway at the stability endpoint, pass the generation parameters as the body, and settle the payment in USDC on-chain.”
Technical details
Endpoint
POSThttps://quanta-roan.vercel.app/api/service/stability?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need pay-per-call access to Stability AI (or a stability-related service) without committing to a traditional subscription or API key, and when your agent operates in a web3/crypto context where USDC micropayments via the x402 protocol are preferred. Ideal for autonomous agents that need to self-fund API calls using on-chain balances.
Side effects
- Insufficient USDC balance causes payment failure and request rejection
- Invalid or malformed JSON body string causes upstream error
- Upstream Stability AI service unavailable or rate-limited returns passthrough error
- Incorrect path parameter results in 404 from upstream
- x402 payment protocol negotiation failure blocks request entirely
- Vercel cold start may add latency on first request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| body | string | Optional JSON body forwarded to POST requests. |
| path | string | Path below the selected upstream origin. |
| query | object | |
| method | string |
Output
Schema · Response
{
"description": "The upstream response body and content type are passed through after successful payment."
}Tags
x402
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