Image generation (Premium)

Generate a premium image from a text prompt using GPT Image 2 (medium quality, 1024x1024). Flagship model with best detail and coherence. No API key needed; pay per call via x402. Returns base64 PNG. Prompt capped at 4000 chars.

Input

Field	Type	Description
prompt *	string	Text description of the desired image (max 4000 chars)

Example output

{
  "model": "gpt-image-2",
  "provider": "openai",
  "quality": "medium",
  "size": "1024x1024",
  "image": "<base64-encoded PNG>",
  "revised_prompt": "A single red apple on a white background"
}

Try it — see the 402 challenge (free)

curl -i -X POST https://agent402.tools/api/image-gen-premium \
  -H "Content-Type: application/json" \
  -d '{"prompt":"A single red apple on a white background"}'

The response is HTTP 402 Payment Required with exact payment requirements. Any x402 v2 client pays automatically and retries:

Paid call (JavaScript agent)

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client();
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/image-gen-premium", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "prompt": "A single red apple on a white background"
  }),
});

Wallet-only. This tool reaches the network/browser/storage, so it is paid in USDC via x402 (no proof-of-work tier).

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