Geometry — AI Image Generation API

> Generate images from text prompts. Pay per request with USDC on Solana via x402. No API keys, no accounts.

• Homepage: https://geometry.sh
• Agent Card: https://api.geometry.sh/.well-known/agent.json
• Docs: https://app.geometry.sh/developers

Payment

Endpoints

GET /api/x402/generate/quote

Get the USDC price for a model. Free — no payment required.

Example response:

{
  "success": true,
  "data": {
    "model": "flux-dev",
    "costUsdc": 0.0325,
    "paymentNetwork": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "79BLYwUdsNpPzDktxjibFR4DKMhHV2Q8iBu7Fk7R9fuU"
  }
}

POST /api/x402/generate

Generate an AI image from a text prompt. Requires x402 USDC payment.

Example request:

{
  "prompt": "A neon-lit Tokyo alley in the rain",
  "model": "flux-dev"
}

Example response:

{
  "success": true,
  "data": {
    "id": "ab0e4a1b-179f-4a6e-b505-53206a3e2e4b",
    "status": "completed",
    "prompt": "A neon-lit Tokyo alley in the rain",
    "model": "flux-dev",
    "costUsdc": 0.0325,
    "imageUrl": "https://cdn.geometry.sh/generations/user-id/gen-id.png",
    "createdAt": "2026-02-15T17:29:17.256Z"
  }
}

Available Models

Quick Start

JavaScript

import { createKeyPairSignerFromBytes } from "@solana/kit";
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { ExactSvmScheme } from "@x402/svm/exact/client";

const signer = await createKeyPairSignerFromBytes(keypairBytes);
const client = new x402Client();
client.register("solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp", new ExactSvmScheme(signer));

const fetchWithPay = wrapFetchWithPayment(fetch, client);

const res = await fetchWithPay("https://api.geometry.sh/api/x402/generate", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({ prompt: "A cat in space" }),
});

const { data } = await res.json();
console.log(data.imageUrl);

cURL

# Step 1: Get a quote (free)
curl https://api.geometry.sh/api/x402/generate/quote?model=flux-dev

# Step 2: POST to generate (returns 402 with payment instructions)
curl -X POST https://api.geometry.sh/api/x402/generate \
  -H "Content-Type: application/json" \
  -d '{"prompt": "A cat in space", "model": "flux-dev"}'

# Step 3: Use an x402 client to handle payment automatically
# npm install @x402/fetch @x402/svm