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Build with AI generation APIs
Practical guides to image, video and text generation — one API key, prepaid USD billing, every major model. No per-provider accounts, no credit systems.
Video Generation API: Models, Methods, and Billing
Every hosted video model — Veo, Kling, Seedance — the text_to_video and image_to_video methods, async webhooks, and how prepaid billing prices each second.
Image Generation API: Models, Methods, and Billing
Every hosted image model, the text_to_image and image_edit methods, and how prepaid USD billing prices each call — one API key, one task contract for all of it.
Estimate Generation Cost Before You Spend
POST /v1/estimate prices a request before you submit it, no charge or reservation — the response shape, the billing unit, and the bundle gotchas that move the price.
Handling Rate Limits on AI Generation APIs
429s are normal at volume. Here's how to read rate-limit headers, back off with jitter, and queue image/video jobs so throttling never drops one.
Idempotency Keys for a Generation API
A dropped connection shouldn't mean a second bill. Here's how the Idempotency-Key header on Aigenway makes retries safe for every provider and model.
Free AI Image API: What "Free" Actually Gets You
Free AI image API tiers hide real limits: daily quotas, watermarks, slower queues, often a commercial-use block. The honest trade-off, plus $5 in free credit.
Prepaid AI API with No Subscription: Pay-As-You-Go in USD
No monthly plan, no per-provider account, no credit pack. Top up a USD balance, spend per request, and read what's left straight from the API. $5 free to start.
AI Generation API Pricing Compared: Per-Unit Billing
How image, video and text generation APIs actually bill — per-image, per-second, per-token — and what prepaid USD gets you that a credit-pack system doesn't.
Best Text-to-Video API in 2026
A practical 2026 roundup of text-to-video APIs — Veo 3, Kling and Seedance — on prompt fidelity, audio, cost and the shared async flow behind one key.
Best AI Image Generation API in 2026
Nano Banana, Imagen 4, gpt-image-1 and DALL·E 3 each win different 2026 image briefs — compare them and call all four behind one API key, one task contract.
Best Image-to-Video API in 2026
An honest 2026 roundup of image-to-video APIs — Kling, Veo 3 and Seedance — compared on motion quality, cost and when to use each, all behind one key.
Seedance Image-to-Video vs Text-to-Video: Which to Use
Seedance image-to-video vs text-to-video compared on quality, control and cost — plus the task contract that makes switching between them a one-line change.
Veo 3 vs Sora: Capabilities, Audio, and Who Ships an API
Veo 3 vs Sora compared on audio, prompt adherence and motion — plus the practical difference that actually decides production: one has a billed API today.
Kling vs Runway for Image-to-Video: i2v, Motion, Cost
Kling is on the gateway behind one API key; Runway isn't. How the two compare on image-to-video quality, motion control and cost per second.
Imagen 4 vs Flux: Which One to Call From Your API
Imagen 4 is hosted here with one API key and prepaid billing; FLUX is not. Compare quality, latency and cost, and get FLUX-style output through the gateway.
Poll vs Webhook for Async AI Generation Jobs
Decide whether to poll or use signed webhooks for long image and video jobs, then make either path survive retries, missed deliveries, and duplicate events.
Generate Video Thumbnails with an API: Prompts and Sizing
Auto-generate on-brand video thumbnails from a still frame or a prompt — aspect ratios per platform, text-safe composition, and a batch pattern for a whole catalog.
AI Video for Ads via API: Text-to-Video & Image-to-Video Clips
Produce short ad clips programmatically with Kling, Veo and Seedance — text-to-video for concepts, image-to-video from product stills, one API key.
AI Product Photography API: Backgrounds, Variants, Scale
Generate and edit e-commerce product shots via API — swap backgrounds, batch color variants, and keep the product consistent across a catalog with one key.
Batch Image Generation API: Concurrency and Cost Control
Generate images at scale with one task contract: idempotency keys, bounded concurrency, webhook collection, and a balance check before you queue the batch.
Generate Consistent Characters via API
Keep a character on-model across generations with reference-image prompting on Nano Banana and gpt-image-1 — one API key, real curl requests, prepaid USD billing.
Image Editing API: Edits & Inpainting with One Key
Edit an existing image over one REST API — Nano Banana image_edit and gpt-image-1 masked inpainting behind one API key, prepaid USD billing, real curl requests.
Novita AI Alternative: Prepaid USD, One Task Contract
Comparing Novita AI as a fellow model aggregator: same multi-model breadth, a prepaid USD balance read from the API, one stable task contract, and signed webhooks.
Segmind API Alternative: Prepaid USD, One Task Contract
Comparing Segmind as a fellow model aggregator: same multi-model breadth, a prepaid USD balance read from the API, one stable task contract, and signed webhooks.
Adobe Firefly API Alternative: One Key, No Lock-In
Adobe Firefly isn't hosted here. Get comparable image generation from Nano Banana, Imagen 4, gpt-image-1 and DALL·E 3 behind one API key, prepaid USD billing.
Synthesia API Alternative: Kling, Veo 3 & Seedance, One Key
Synthesia isn't on the gateway. The honest trade-off, and how to get comparable spoken avatar and narrated video from Kling, Veo 3 and Seedance behind one API key.
HeyGen API Alternative: Kling, Veo 3 & Seedance, One Key
HeyGen isn't on the gateway. The honest trade-off, and how to get comparable talking-head and spoken video from Kling, Veo 3 and Seedance behind one API key.
Qwen Image API Alternative: Same Brief, One Gateway Key
Alibaba Qwen Image isn't hosted here. Get comparable precise text and complex-layout images from Nano Banana, Imagen 4, gpt-image-1 and DALL·E 3 behind one key.
Sora API Alternative: Kling, Veo 3 & Seedance, One Key
OpenAI never shipped a public Sora API. The honest alternative: generate video with Kling, Veo 3 and Seedance via one API key and prepaid per-second USD.
One API for AI Image, Video, and Text Generation
Why one gateway beats a provider account per model: one key, one request shape across image/video/text, switch models with a string, prepaid USD billing.
Async Tasks and Webhooks for AI Generation
Every model on Aigenway shares one task contract: submit, then poll or get a signed webhook, then fetch the result. Here's the full lifecycle in code.
Cheapest AI Image Generation API: Per-Image Cost Compared
How Nano Banana, Imagen 4, gpt-image-1 and DALL·E 3 price per image, why prepaid USD billing beats credit packs, and how to check live numbers before you commit.
Cheapest AI Video Generation API: Per-Second Cost Compared
How Seedance, Kling and Veo actually price per second of generated video, why prepaid USD billing beats credit packs, and how to pull live numbers before you commit.
DALL·E 3 vs gpt-image-1: Which OpenAI Model to Call
DALL·E 3 vs gpt-image-1 compared on prompt fidelity, text rendering, and editing — both sit behind one API key on Aigenway, so you can test both on your own prompt.
Nano Banana vs gpt-image vs Imagen 4: Which to Call
Compare Nano Banana, gpt-image-1 and Imagen 4 on prompt adherence, editing, text rendering and cost — all three sit behind one API key, switch with a string.
Veo 3 vs Kling vs Seedance: Video Model Comparison
An honest comparison of Veo 3, Kling and Seedance on quality, speed, cost per second and i2v vs t2v support — all callable from one API key.
Image-to-Video API with Webhook Callbacks
Animate a still image and get the clip pushed to your endpoint instead of polling — one signed webhook contract shared by Kling, Veo and Seedance on Aigenway.
Kling API Node.js Example: fetch, Poll, and Webhooks
Working Node.js/TypeScript code for Kling image-to-video: submit with fetch, poll the task with async/await, or verify a signed webhook in Express.
Nano Banana API Python Example: requests, No SDK
Copy-paste Python using requests to call Nano Banana (Gemini image) text-to-image and image-edit through one gateway API key, then poll or webhook for the result.
Hailuo API Alternative: Kling, Veo 3 & Seedance, One Key
MiniMax Hailuo isn't on the gateway. The honest trade-off, and how to get comparable video from Kling, Veo 3 and Seedance behind one API key and prepaid USD billing.
Wan 2.2 API Alternative: Kling, Veo 3 & Seedance, One Key
Wan 2.2 isn't on the gateway. The honest trade-off, and how to get comparable video from Kling, Veo 3 and Seedance behind one API key and prepaid USD billing.
Luma Dream Machine API Alternative: Kling, Veo 3, Seedance
Luma Dream Machine isn't on the gateway. The honest trade-off, and how Kling, Veo 3 and Seedance cover the same ground with one API key and prepaid USD billing.
Pika API Alternative: Kling, Veo 3 & Seedance, One Key
Pika isn't on the gateway. The honest trade-off, and how to get comparable video from Kling, Veo 3 and Seedance behind one API key and prepaid USD billing.
Together AI Images Alternative: Prepaid USD, One Contract
Comparing Together AI's image endpoint: same multi-model breadth, a prepaid USD balance read from the API, one stable task contract, and signed webhooks.
AIMLAPI Alternative: Prepaid USD, One Task Contract
Comparing AIMLAPI as a fellow model aggregator: same multi-model breadth, a prepaid USD balance read from the API, one stable task contract, and signed webhooks.
Replicate API Alternative: Prepaid USD, Signed Webhooks
Comparing Replicate as a fellow model aggregator: same multi-model breadth, a prepaid USD balance read from the API, one stable task contract, and signed webhooks.
fal.ai Alternative: One Key, Prepaid USD, Signed Webhooks
Comparing fal.ai as a fellow model aggregator: same multi-model breadth, a prepaid USD balance read from the API, one stable task contract, and signed webhooks.
DALL·E 3 API: Call It With One Key, No OpenAI Account
Call OpenAI's DALL·E 3 through one API key and prepaid USD billing — no separate OpenAI account. Real curl requests and exact model codes via /v1/methods.
GPT Image 1 API: Call OpenAI's Image Model, One Key
Call OpenAI's gpt-image-1 via one API key and prepaid USD billing — no separate OpenAI account. Real curl requests and exact model codes via /v1/methods.
Google Imagen 4 API: Call It With One Key
Call Google Imagen 4 (including Ultra) through one API key and prepaid USD billing — no separate Google Cloud project. Real curl, exact model codes via /v1/methods.
Runway API Alternative: Kling, Veo 3 & Seedance, One Key
Runway isn't on the gateway. The honest trade-off, and how to get comparable video from Kling, Veo 3 and Seedance behind one API key and prepaid USD billing.
Leonardo AI API Alternative: Same Brief, One Gateway Key
Leonardo AI isn't hosted here. Get comparable fine-tuned, game-asset-ready images from Nano Banana, Imagen 4, gpt-image-1 and DALL·E 3 behind one API key.
Stable Diffusion API Alternative: No GPUs, No Self-Hosting
Stable Diffusion isn't hosted here. Get comparable images from Nano Banana, Imagen 4, gpt-image-1 and DALL·E 3 — one API key, one task contract, prepaid billing.
Recraft API Alternative: Brand-Style Images, One Gateway Key
Recraft isn't hosted here. Get comparable brand-style icons and flat illustrations from Nano Banana, Imagen 4, gpt-image-1 and DALL·E 3 behind one API key.
Ideogram API Alternative: Legible Text, One Gateway Key
Ideogram isn't hosted here. Get comparable legible in-image text from Nano Banana, Imagen 4, gpt-image-1 and DALL·E 3 behind one API key, prepaid USD billing.
Flux API Alternative: One Key, No Black Forest Labs Account
FLUX isn't hosted here. Get comparable prompt-adherent, photoreal images from Nano Banana, Imagen 4, gpt-image-1 and DALL·E 3 behind one API key, prepaid billing.
Midjourney API Alternative: Skip the Ban-Risk Wrappers
Midjourney has no official API. Get comparable images from Nano Banana, Imagen 4, gpt-image-1 and DALL·E 3 behind one API key, no Discord wrapper, no ban risk.
Google Veo 3 API: Generate Video with Native Audio
Call Google's Veo 3 with native audio through one API key and prepaid USD billing — no GCP project. Text-to-video, image-to-video, poll or webhook for the clip.
Seedance API: Text-to-Video and Image-to-Video
Call ByteDance's Seedance video model with one API key and prepaid USD billing — fast text-to-video and image-to-video, plus the async task and webhook flow.
Nano Banana API: Generate & Edit Images with Gemini
Call Google's Nano Banana (Gemini image) model from your code with one API key and prepaid USD billing — text-to-image and image editing over a single REST endpoint, no GCP project required.
Kling AI API: Text-to-Video, Image-to-Video & Motion Control
Call Kling's video models through one API key with prepaid USD billing — text-to-video, image-to-video and Motion Control over a single REST endpoint, with idempotent requests and webhooks.