{"id":"b0493ad7-e099-46d8-afde-275636957060","shortId":"4Q3Trq","kind":"mpp","title":"GPT Image 1 generation via micropayments — pay per image with USDC on Base, no API keys needed.","tagline":"GPT Image 1 generation via micropayments — pay per image with USDC on Base, no API keys needed.","description":"This endpoint provides access to OpenAI's GPT Image 1 model for image generation through StableStudio's pay-per-call micropayment infrastructure. The specific route listed is `/api/generate/gpt-image-1/generate`, though the OpenAPI spec documents the newer `gpt-image-1.5` variant at a slightly different path. The endpoint accepts a POST with a JSON body containing a prompt and optional parameters for quality, size, background transparency, output format, and moderation level. Pricing for GPT Image 1.5 generation ranges from $0.009 to $0.20 per call depending on quality and resolution settings. Generation takes approximately 3 seconds.\n\nPayment is handled via the MPP protocol (Tempo method on Base L2) or x402. Calling the endpoint without a payment header returns a 402 with a `PAYMENT-REQUIRED` header containing base64-encoded USDC payment requirements. After signing and submitting payment, the endpoint returns a job ID which must be polled via `GET /api/jobs/{jobId}` using SIGN-IN-WITH-X wallet authentication until the image URL is available. No API keys or subscriptions are required — only a crypto wallet with USDC on Base.\n\nStableStudio is a broader platform offering multiple image and video models (Nano Banana Pro, Flux 2 Pro, Grok, Seedance, Wan, Sora, Veo) all accessible through the same micropayment pattern. An MCP server is available via `npx -y agentcash@latest` for agent integration. Note: the probe returned 405 on HEAD/GET because this is a POST-only endpoint — the endpoint is live and correctly documented in the OpenAPI spec.","tags":["image","video","generation","nano-banana","gpt-image","grok","flux","sora","veo","seedance","wan"],"capabilities":["text-to-image","image-generation","gpt-image-1","micropayment-api","usdc-on-base","pay-per-call","transparent-background","multi-format-output","no-api-key","async-job-polling","mcp-server"],"categories":["vision","image-generation"],"synonyms":["GPT Image 1","gpt-image-1","OpenAI image generation","AI image generator","text to image API","DALL-E alternative","StableStudio GPT","micropayment image API","crypto image generation","pay-per-image"],"warnings":["The listed endpoint path uses 'gpt-image-1' but the OpenAPI spec documents 'gpt-image-1.5' — these may be different model versions or the path may have been updated","Probe returned 405 because HEAD/GET were tried on a POST-only endpoint — not an indication the endpoint is down","No dedicated documentation page exists at /docs (returns 404); all docs are embedded in the OpenAPI spec x-guidance field","Requires a crypto wallet with USDC on Base (EIP-155:8453) for payment"],"endpointUrl":"https://stablestudio.dev/api/generate/gpt-image-1/generate","protocol":"mpp","transport":"http","auth":{"type":"mpp","details":{"realm":"stablestudio.dev","intent":"charge","method":"tempo","service_methods":{"tempo":{"assets":["0x20c000000000000000000000b9537d11c60e8b50"],"intents":["charge"]}}}},"qualityScore":"0.780","qualityRationale":"Full OpenAPI schema with detailed input/output specs, clear pricing ($0.009–$0.20), documented payment flow, and agents.txt present. The probe returned 405 because HEAD/GET were used on a POST-only endpoint — the endpoint is live per the OpenAPI spec. Minor deductions: the listed path uses 'gpt-image-1' but the OpenAPI spec documents 'gpt-image-1.5', creating slight ambiguity; no dedicated docs page exists 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'/api/jobs':184 '0.009':114 '0.20':116 '1':3,20,44 '1.5':74,110 '2':230 '3':128 '402':153 '405':261 'AI image generator' 'DALL-E alternative' 'GPT Image 1' 'OpenAI image generation' 'StableStudio GPT' 'accept':83 'access':38,238 'agent':255 'agentcash':252 'api':15,32,201 'approxim':127 'async-job-polling' 'authent':193 'avail':199,248 'background':99 'banana':227 'base':13,30,140,214 'base64':162 'base64-encoded':161 'bodi':89 'broader':218 'call':55,118,144 'contain':90,160 'correct':277 'crypto':209 'crypto image generation' 'depend':119 'differ':79 'document':68,278 'encod':163 'endpoint':36,82,146,173,271,273 'flux':229 'format':102 'generat':4,21,48,111,125 'get':183 'gpt':1,18,42,72,108 'gpt-imag':71 'gpt-image-1' 'grok':232 'handl':132 'head/get':263 'header':150,159 'id':177 'imag':2,9,19,26,43,47,73,109,196,222 'image-generation' 'infrastructur':57 'integr':256 'job':176 'jobid':185 'json':88 'key':16,33,202 'l2':141 'latest':253 'level':105 'list':61 'live':275 'mcp':245 'mcp-server' 'method':138 'micropay':6,23,56,242 'micropayment image API' 'micropayment-api' 'model':45,225 'moder':104 'mpp':135 'multi-format-output' 'multipl':221 'must':179 'nano':226 'need':17,34 'newer':70 'no-api-key' 'note':257 'npx':250 'offer':220 'openai':40 'openapi':66,281 'option':94 'output':101 'paramet':95 'path':80 'pattern':243 'pay':7,24,53 'pay-per-cal':52 'pay-per-call' 'pay-per-image' 'payment':130,149,157,165,171 'payment-requir':156 'per':8,25,54,117 'platform':219 'poll':181 'post':85,269 'post-on':268 'price':106 'pro':228,231 'probe':259 'prompt':92 'protocol':136 'provid':37 'qualiti':97,121 'rang':112 'requir':158,166,206 'resolut':123 'return':151,174,260 'rout':60 'second':129 'seedanc':233 'server':246 'set':124 'sign':168,188 'sign-in-with-x':187 'size':98 'slight':78 'sora':235 'spec':67,282 'specif':59 'stablestudio':50,215 'submit':170 'subscript':204 'take':126 'tempo':137 'text to image API' 'text-to-image' 'though':64 'transpar':100 'transparent-background' 'url':197 'usdc':11,28,164,212 'usdc-on-base' 'use':186 'variant':75 'veo':236 'via':5,22,133,182,249 'video':224 'wallet':192,210 'wan':234 'without':147 'x':191 'x402':143 'y':251","prices":[{"id":"53db7505-51f7-4824-a660-b6ddbf86715c","listingId":"b0493ad7-e099-46d8-afde-275636957060","amountUsd":null,"unit":"per_call","nativeCurrency":"pathUSD","nativeAmount":null,"chain":"tempo","payTo":null,"paymentMethod":"mpp-tempo","isPrimary":true,"details":{"realm":"stablestudio.dev","intent":"charge","method":"tempo","dynamic":true,"decimals":6,"unit_type":null,"amount_hint":null,"raw_payment":{"intent":"charge","method":"tempo","dynamic":true,"currency":"0x20c000000000000000000000b9537d11c60e8b50","decimals":6,"description":"GPT Image 1 generation"},"asset_contract":"0x20c000000000000000000000b9537d11c60e8b50"},"createdAt":"2026-04-18T20:00:05.894Z"}],"sources":[{"listingId":"b0493ad7-e099-46d8-afde-275636957060","source":"mpp_dev","sourceId":"stablestudio:POST:/api/generate/gpt-image-1/generate","sourceUrl":"https://mpp.dev/api/services","isPrimary":true,"firstSeenAt":"2026-04-18T20:00:05.894Z","lastSeenAt":"2026-04-22T04:15:10.138Z"}],"details":{"listingId":"b0493ad7-e099-46d8-afde-275636957060","quickStartSnippet":"# 1. POST without payment to get 402 challenge\ncurl -X POST https://stablestudio.dev/api/generate/gpt-image-1/generate \\\n  -H 'Content-Type: application/json' \\\n  -d '{\"prompt\": \"A cat in a spacesuit on Mars\"}\"\n# Returns 402 with PAYMENT-REQUIRED header (base64 JSON)\n# 2. Decode header, sign USDC payment, re-POST with PAYMENT-SIGNATURE header\n# 3. Poll GET /api/jobs/{jobId} with SIGN-IN-WITH-X header until complete","exampleRequest":{"size":"1024x1024","prompt":"A cat in a spacesuit on Mars, photorealistic","quality":"high","background":"opaque","moderation":"auto","output_format":"png"},"exampleResponse":{"type":"gpt-image-1-generate","jobId":"abc123-def456","status":"pending","success":true},"schema":{"path":"/api/generate/gpt-image-1/generate","method":"POST","payment":{"intent":"charge","method":"tempo","dynamic":true,"currency":"0x20c000000000000000000000b9537d11c60e8b50","decimals":6,"description":"GPT Image 1 generation"},"description":"GPT Image 1 generation"},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"GPT Image 1.5 generation costs $0.009–$0.20 per call and takes ~3s","source_url":"https://stablestudio.dev"},{"claim":"Payment is via USDC on Base (EIP-155:8453) with x402 or MPP Tempo protocol","source_url":"https://stablestudio.dev"},{"claim":"MCP server available via npx -y agentcash@latest","source_url":"https://stablestudio.dev"},{"claim":"GPT Image 1.5 generate accepts prompt, quality, size, background, output_format, moderation parameters","source_url":"https://stablestudio.dev"},{"claim":"Successful generation returns jobId with pending status, polled via GET /api/jobs/{jobId}","source_url":"https://stablestudio.dev"}],"useCases":["Generate images from text prompts with per-call crypto micropayments","Create images with transparent backgrounds for design assets","Agent-driven image generation without API key management","Programmatic image creation with quality/size/format controls","Low-cost image generation starting at $0.009 per image"],"bestFor":["Agents and bots needing on-demand image generation without subscriptions","Developers who want to pay per generation with USDC rather than monthly plans","Applications requiring transparent PNG output or multiple format options","Low-volume or bursty image generation workloads"],"notFor":["Users without a crypto wallet or USDC on Base","High-throughput batch image processing (async polling adds latency)","Applications requiring synchronous image responses"],"kindDetails":{"docs":{"llmsTxt":"https://stablestudio.dev/llms.txt","homepage":"https://stablestudio.dev"},"tags":["image","video","generation","nano-banana","gpt-image","grok","flux","sora","veo","seedance","wan"],"realm":"stablestudio.dev","status":"active","methods":{"tempo":{"assets":["0x20c000000000000000000000b9537d11c60e8b50"],"intents":["charge"]}},"provider":{"url":"https://stablestudio.dev","name":"Merit Systems"},"categories":["ai","media"],"service_id":"stablestudio","integration":"first-party","service_name":"StableStudio","service_description":"Pay-per-generation AI image and video creation — Nano Banana, GPT Image, Grok, Flux, Sora, Veo, Seedance, and Wan."},"updatedAt":"2026-04-22T04:15:10.138Z"}}