Image Generate Quality API — Pay Per Call with USDC on Base

Generate a premium-quality image from a text prompt (10-30s, better prompt adherence and typography). Returns a permanent https URL to the hosted image on api.freeq.one/media/*. Part of the x402 Gateway — $0.09 per call, settled in USDC on Base. No accounts, no API keys: agents pay per request via the x402 protocol.

How payment works

Send a POST to https://x402.freeq.one/tools/image_generate_quality without a payment header and the API replies 402 Payment Required with an x402 challenge (payTo address, USDC amount, Base network). A paying agent signs the USDC payment and retries with the PAYMENT-SIGNATURE header (base64 JSON payment payload) — settlement is verified on-chain in seconds and the API response returns with a PAYMENT-RESPONSE receipt header.

Example call

curl -X POST https://x402.freeq.one/tools/image_generate_quality \
  -H "Content-Type: application/json" \
  -d '{"prompt":"a cyberpunk market at night, volumetric fog, 4k","width":1024,"height":1024}'

Browse every pay-per-call API on the all APIs page, or inspect the machine-readable service card and OpenAPI spec.