{"name":"Nano Banana — Gemini Image Generation (RAEN x402)","description":"Pay $0.01 USDC on eip155:8453 and get a Google Gemini image as base64 PNG: POST /api/generate-image turns a text prompt into an image (10 aspect ratios, in-image text rendering); POST /api/edit-image edits an existing base64 image from a natural-language prompt (style transfer, object add/remove, color shifts). Pay per call via x402 — no API keys, no subscription. Free surfaces: GET /sample (exact output shape), GET /openapi.json, GET /pricing.md, GET /llms.txt, GET /about, GET /health, GET /.well-known/x402.json.","version":"1.0.0","protocolVersion":"1.0","url":"https://nanobanana-x402.fly.dev/a2a","supportedInterfaces":[{"url":"https://nanobanana-x402.fly.dev/a2a","transport":"JSONRPC","protocolBinding":"JSONRPC","protocolVersion":"1.0"}],"preferredTransport":"JSONRPC","provider":{"organization":"Royal Agentic Enterprises","url":"https://nanobanana-x402.fly.dev"},"documentationUrl":"https://nanobanana-x402.fly.dev/pricing.md","capabilities":{"streaming":false,"pushNotifications":false,"stateTransitionHistory":false,"extensions":[{"uri":"https://x402.org","description":"x402 v2 payment gating: USDC on eip155:8453, scheme exact, $0.01 per image, facilitator https://raen-facilitator.fly.dev/facilitator, payTo treasury 0x7861db4efc14a1ed5dd8c96c528a3796560f1393. The live 402 challenge is authoritative.","required":false}]},"defaultInputModes":["application/json","text/plain"],"defaultOutputModes":["application/json","text/plain"],"skills":[{"id":"generate-image-guide","name":"Paid image generation guide","description":"Explains how to buy POST /api/generate-image ($0.01 USDC on eip155:8453): body { prompt, aspectRatio? }; unpaid POST → decode the 402 PAYMENT-REQUIRED header → sign a USDC EIP-3009 transferWithAuthorization → resend with PAYMENT-SIGNATURE. Returns { ok, model, image_b64, mime_type } base64 PNG from gemini-3.1-flash-image-preview.","tags":["image","generation","gemini","prompt","x402","usdc"],"examples":["How do I generate a product hero image for $0.01 with x402?"]},{"id":"edit-image-guide","name":"Paid image edit guide","description":"Points to POST /api/edit-image (same price): send the source image as base64 plus a prompt describing the edit — style transfer, object addition/removal, color shifts, scene modifications — and receive the edited base64 PNG.","tags":["image","edit","base64","style-transfer","x402"],"examples":["Can I edit an existing image instead of generating from scratch?"]},{"id":"machine-readable-surfaces","name":"Machine-readable discovery surfaces","description":"Guides agents to this wall's free machine surfaces: /pricing.md, /llms.txt, /openapi.json, /about, /health, /sample, /.well-known/x402.json (live 402 accepts), /.well-known/agent-card.json (this card), POST /a2a (A2A v1 JSON-RPC).","tags":["discovery","openapi","x402","a2a","json"],"examples":["Where is the machine-readable pricing manifest for this service?"]}],"securitySchemes":{},"security":[]}