{"uid":"cap_St2MNNk3zJf32jQyw6VnY","slug":"imgnai-katana-api-happy-horse-video-generation-369d9cc7","name":"imgnAI Katana API – Happy Horse Video Generation","description":"Pay-per-call AI gateway: Frontier/SOTA LLM, Image, and Video models - and proprietary low-cost imgnAI models. Includes GPT 5.5, Opus 4.8, GPT Image 2, Nano Banana 2, Seedance 2.0, Happy Horse, and Google Omni. Fully compatible with OpenAPI, HermesOS, and OpenClaw.","url":"https://kat.imgnai.com/v1/videos/happy-horse","method":"POST","headers":{},"bodySchema":{"type":"object","required":["prompt"],"properties":{"prompt":{"type":"string"}}},"responseSchema":{"type":"object"},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"1.56","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$1.56/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"1.56","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"1.56","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_iKtS9G6uqaVq3sjTgkTpZ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"1.56","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Generates AI videos using the proprietary Happy Horse model via the imgnAI Katana pay-per-call gateway","exampleAgentPrompt":"Generate a 5-second Happy Horse AI video of a golden retriever running through a sunflower field, in 16:9 aspect ratio, avoiding any dark or stormy backgrounds.","exampleUseCases":null,"resultDescription":"Returns a JSON object with a status string, a request ID, and a responses array containing the generated video output or job reference from the Happy Horse model.","failureModes":["Missing required prompt field returns a 400 validation error","Invalid aspect_ratio value may cause model rejection","Payment failure via x402 protocol results in 402 response and no video generated","Duration or duration_seconds out of supported range may cause a model error","Request times out if the video generation takes longer than allowed","Invalid client_request_id format may cause request tracking issues"],"whenToPreferThis":"Choose this endpoint when you need to generate short AI videos using imgnAI's proprietary Happy Horse model specifically, particularly when cost-efficiency matters compared to top-tier video models like Seedance. Ideal for agents that need pay-per-call video generation without subscription overhead, and compatible with OpenAI-style API conventions.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T17:52:35.926Z","isFirstParty":false}