PixelPay

AI image generation API monetized via MPP (Machine Payments Protocol). No API keys — just pay per request with USDC on Tempo blockchain.

Live: https://pixelpayapi.com

Pricing

Model	Tier	Price
fal-ai/flux/schnell	Schnell (fast)	$0.03
fal-ai/stable-diffusion-v35-large	SD3.5	$0.04
fal-ai/flux/dev	Dev (balanced)	$0.05
fal-ai/recraft-v3	Recraft (SVG + raster)	$0.06
fal-ai/hidream-i1-full	HiDream (high quality)	$0.08
fal-ai/ideogram/v3	Ideogram (text-in-image)	$0.08
fal-ai/flux-pro/v1.1	Pro (high quality)	$0.10

How It Works

POST /v1/images/generate  →  402 "pay first"  →  transfer USDC  →  200 + image

1. Send POST /v1/images/generate with a prompt and model
2. Receive 402 Payment Required with payment challenge (amount varies by model)
3. Sign a Tempo transaction for the required USDC
4. Retry with Authorization: Payment <credential>
5. Get your generated image(s) + Payment-Receipt header

Endpoints

Method	Path	Description
POST	/v1/images/generate	Generate image (MPP-protected)
POST	/api/demo	Free demo (3/day, no wallet needed)
GET	/v1/prices	Current pricing tiers
GET	/openapi.json	MPP service discovery
GET	/llms.txt	LLM-friendly docs
GET	/health	Health check

Quick Start

cp .env.example .env
# Edit .env with your WALLET_PRIVATE_KEY (Tempo wallet)
npm install
npm start

Tech Stack

• Server: Express.js
• Image backend: fal.ai via MPP (9 models, paid with same Tempo wallet)
• Payments: MPP via Tempo blockchain (USDC)
• Deploy: Render

MPP Directory

Listed on MPPscan. The /openapi.json includes x-payment-info and x-discovery extensions per the MPP spec.

License

MIT