{"id":"b4b3758b-f0d6-4c8d-a0cd-ac6ea3984d14","shortId":"PXJXuB","kind":"mpp","title":"Grok image generation via micropayment — $0.07 per image, ~3s, 13 aspect ratios including ultra-wide","tagline":"Grok image generation via micropayment — $0.07 per image, ~3s, 13 aspect ratios including ultra-wide","description":"This endpoint generates images using the Grok Image model through StableStudio's pay-per-generation API. It accepts a text prompt and an optional aspect ratio (13 options including standard, wide, and ultra-wide like 19.5:9 and 20:9), returning a job ID that can be polled for the completed image URL. The cost is $0.07 per generation with ~3s turnaround.\n\nPayment is handled via the MPP protocol (Tempo method with pathUSD on Tempo L2) or x402 (USDC on Base, network eip155:8453). No API keys are needed — callers POST to the endpoint without a payment header to receive a 402 challenge, then sign a USDC authorization and resubmit with a PAYMENT-SIGNATURE header. The response includes a jobId; poll GET /api/jobs/{jobId} with a SIGN-IN-WITH-X wallet signature header until the job completes and returns an imageUrl.\n\nStableStudio also offers a companion Grok edit endpoint at /api/generate/grok/edit ($0.022) that accepts reference images. The Grok generate endpoint is part of a broader platform offering multiple image models (Nano Banana Pro, GPT Image 1.5, Flux 2 Pro) and video models (Grok Video, Seedance, Wan 2.6, Sora 2, Veo 3.1). An MCP server is available via `npx -y agentcash@latest` for agent integration.","tags":["image","video","generation","nano-banana","gpt-image","grok","flux","sora","veo","seedance","wan"],"capabilities":["text-to-image","grok-image-model","ultra-wide-aspect-ratios","micropayment-per-call","usdc-on-base","tempo-pathusd","no-api-key","async-job-polling","wallet-auth","openapi-spec"],"categories":["vision","image-generation"],"synonyms":["grok image generation","xAI image API","text to image","AI image generator","Grok Aurora","StableStudio Grok","pay-per-image","micropayment image generation","crypto image API"],"warnings":["Endpoint probe returned 405 on HEAD/GET; this is expected for a POST-only route but means the 402 challenge was not directly captured for this specific endpoint","No dedicated documentation pages found (/docs, /pricing, /api all return 404); all docs are embedded in the OpenAPI spec"],"endpointUrl":"https://stablestudio.dev/api/generate/grok/generate","protocol":"mpp","transport":"http","auth":{"type":"mpp","details":{"realm":"stablestudio.dev","intent":"charge","method":"tempo","service_methods":{"tempo":{"assets":["0x20c000000000000000000000b9537d11c60e8b50"],"intents":["charge"]}}}},"qualityScore":"0.850","qualityRationale":"Full OpenAPI schema with detailed input/output specs, clear pricing ($0.07), documented payment flow, and agents.txt present. The endpoint returned 405 on HEAD/GET probes (expected — it's a POST-only endpoint), so liveness is inferred from the broader platform being up (root 200) and the comprehensive OpenAPI spec. Docs pages 404, but the OpenAPI x-guidance field provides thorough 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'/api/jobs':158 '0.022':188 '0.07':6,22,91 '1.5':212 '13':10,26,60 '19.5':70 '2':214,225 '2.6':223 '20':73 '3.1':227 '3s':9,25,95 '402':136 '8453':118 '9':71,74 'AI image generator' 'Grok Aurora' 'StableStudio Grok' 'accept':51,190 'agent':239 'agentcash':236 'also':179 'api':49,120 'aspect':11,27,58 'async-job-polling' 'author':142 'avail':232 'banana':208 'base':115 'broader':201 'caller':124 'challeng':137 'companion':182 'complet':85,173 'cost':89 'crypto image API' 'edit':184 'eip155':117 'endpoint':34,128,185,196 'flux':213 'generat':3,19,35,48,93,195 'get':157 'gpt':210 'grok':1,17,39,183,194,219 'grok image generation' 'grok-image-model' 'handl':99 'header':132,150,169 'id':78 'imag':2,8,18,24,36,40,86,192,205,211 'imageurl':177 'includ':13,29,62,153 'integr':240 'job':77,172 'jobid':155,159 'key':121 'l2':110 'latest':237 'like':69 'mcp':229 'method':105 'micropay':5,21 'micropayment image generation' 'micropayment-per-call' 'model':41,206,218 'mpp':102 'multipl':204 'nano':207 'need':123 'network':116 'no-api-key' 'npx':234 'offer':180,203 'openapi-spec' 'option':57,61 'part':198 'pathusd':107 'pay':46 'pay-per-gener':45 'pay-per-image' 'payment':97,131,148 'payment-signatur':147 'per':7,23,47,92 'platform':202 'poll':82,156 'post':125 'pro':209,215 'prompt':54 'protocol':103 'ratio':12,28,59 'receiv':134 'refer':191 'respons':152 'resubmit':144 'return':75,175 'seedanc':221 'server':230 'sign':139,163 'sign-in-with-x':162 'signatur':149,168 'sora':224 'stablestudio':43,178 'standard':63 'tempo':104,109 'tempo-pathusd' 'text':53 'text to image' 'text-to-image' 'turnaround':96 'ultra':15,31,67 'ultra-wid':14,30,66 'ultra-wide-aspect-ratios' 'url':87 'usdc':113,141 'usdc-on-base' 'use':37 'veo':226 'via':4,20,100,233 'video':217,220 'wallet':167 'wallet-auth' 'wan':222 'wide':16,32,64,68 'without':129 'x':166 'x402':112 'xAI image API' 'y':235","prices":[{"id":"cbb1fca7-b33e-4457-9f51-87ad266e5be2","listingId":"b4b3758b-f0d6-4c8d-a0cd-ac6ea3984d14","amountUsd":"0.07","unit":"per_call","nativeCurrency":"pathUSD","nativeAmount":"70000","chain":"tempo","payTo":null,"paymentMethod":"mpp-tempo","isPrimary":true,"details":{"realm":"stablestudio.dev","intent":"charge","method":"tempo","dynamic":false,"decimals":6,"unit_type":null,"amount_hint":null,"raw_payment":{"amount":"70000","intent":"charge","method":"tempo","currency":"0x20c000000000000000000000b9537d11c60e8b50","decimals":6,"description":"Grok image generation"},"asset_contract":"0x20c000000000000000000000b9537d11c60e8b50"},"createdAt":"2026-04-18T20:00:04.657Z"}],"sources":[{"listingId":"b4b3758b-f0d6-4c8d-a0cd-ac6ea3984d14","source":"mpp_dev","sourceId":"stablestudio:POST:/api/generate/grok/generate","sourceUrl":"https://mpp.dev/api/services","isPrimary":true,"firstSeenAt":"2026-04-18T20:00:04.657Z","lastSeenAt":"2026-04-22T04:15:10.088Z"}],"details":{"listingId":"b4b3758b-f0d6-4c8d-a0cd-ac6ea3984d14","quickStartSnippet":"# 1. Get payment challenge\ncurl -X POST https://stablestudio.dev/api/generate/grok/generate \\\n  -H 'Content-Type: application/json' \\\n  -d '{\"prompt\": \"A cat astronaut floating in space\", \"aspect_ratio\": \"16:9\"}'\n# Returns 402 with PAYMENT-REQUIRED header (base64 JSON)\n# 2. Decode challenge, sign USDC payment, resubmit with PAYMENT-SIGNATURE header\n# 3. Poll GET /api/jobs/{jobId} with SIGN-IN-WITH-X header until complete","exampleRequest":{"prompt":"A cat astronaut floating in space, photorealistic","aspect_ratio":"16:9"},"exampleResponse":{"type":"grok-generate","jobId":"abc123-def456","status":"pending","success":true},"schema":{"path":"/api/generate/grok/generate","method":"POST","payment":{"amount":"70000","intent":"charge","method":"tempo","currency":"0x20c000000000000000000000b9537d11c60e8b50","decimals":6,"description":"Grok image generation"},"description":"Grok image generation"},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Grok generate costs $0.07 per image with ~3s turnaround","source_url":"https://stablestudio.dev"},{"claim":"Grok generate supports 13 aspect ratios including ultra-wide 19.5:9 and 20:9","source_url":"https://stablestudio.dev"},{"claim":"Payment via USDC on Base (eip155:8453) or Tempo pathUSD, no API keys required","source_url":"https://stablestudio.dev"},{"claim":"MCP server available via npx -y agentcash@latest","source_url":"https://stablestudio.dev"},{"claim":"Grok edit endpoint available at /api/generate/grok/edit for $0.022","source_url":"https://stablestudio.dev"}],"useCases":["Generate images from text prompts with ultra-wide aspect ratio support for banners and phone wallpapers","Agent-driven image creation workflows using micropayments without API key management","Programmatic content generation for social media, marketing, or design assets","On-demand image generation in chatbots or creative tools via MCP integration"],"bestFor":["Agents needing fast, cheap image generation ($0.07, ~3s) without subscriptions","Use cases requiring unusual aspect ratios (19.5:9, 20:9 ultra-wide)","Crypto-native workflows paying per call with USDC on Base or pathUSD on Tempo","Developers wanting a simple prompt-in, image-out API with no auth keys"],"notFor":["Batch processing thousands of images (async polling adds overhead per job)","Users without a crypto wallet (payment requires USDC or pathUSD signing)","Image editing with reference images (use the /grok/edit endpoint instead)"],"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":"2026-04-22T04:15:10.088Z"}}