UseAPI.net

# UseAPI.net — third-party API for popular AI services <small>Index generated: 2026-07-07 00:20 UTC</small> > UseAPI.net provides API access to leading AI models for video creation, image generation, music composition, speech synthesis, face swapping, and more — all through a single $15/month subscription. Each API connects your existing AI website account(s) to a fully-featured REST API at website subscription prices, significantly cheaper than official API rates. Multi-account configuration with automated load balancing is included. An active subscription to the underlying service (e.g. Runway, Kling) is required. ## Start here - [Model Matrix](https://useapi.net/model-matrix): **Canonical list of every model across every API** (video, image, music, speech, face swap, upscale, extend, effects). The authoritative source for what models are available where, with notes on unlimited / free / Premium-only tiers. Always check this first to find which API exposes a given model. - [Complete API spec](https://useapi.net/assets/aibot/all.txt): Single combined documentation file for all supported APIs (~4 MB). Feed this to your LLM for cross-service integrations. For smaller-context models, fetch only the per-service files listed below. - [General Q&A](https://useapi.net/assets/aibot/qa.txt): Cross-cutting tips (rate limiting, prompt moderation, common patterns). **WARNING**: items are general-purpose and may reference deprecated APIs, sunsetted services, or scenarios not applicable to a specific API — always cross-check against the relevant service-specific documentation before applying. - [Account management](https://useapi.net/assets/aibot/account-management.txt): Programmatic account endpoints — check credits & usage statistics (`GET account`, `GET account/stats`) and set account-level defaults like the global `replyUrl` webhook (`POST account`). - [Subscription & pricing](https://useapi.net/docs/subscription): The single flat $15/month useapi.net subscription — what's included and how it works (an active subscription to each underlying AI service is still required). - [Legal & Terms of Service](https://useapi.net/docs/legal): Terms of service and legal information for the experimental APIs. - [Postman & Swagger](https://useapi.net/docs/postman-swagger): The Postman workspace and Swagger / OpenAPI specs for the APIs. - [Support](https://useapi.net/docs/support): How to get help — Discord, Telegram, and email. ## Universal conventions **Authentication.** Every useapi.net request uses header `Authorization: Bearer <token>`. The token format is `user:<number>-<unique-string>` (e.g. `user:12345-abcdefghi`). **Use the complete string** — include the `user:` prefix and the alphanumeric suffix. Do not truncate to just the number. Do not URL-encode. A single token authorizes every API under the user's subscription. **Cross-service shared models.** The same underlying model (Veo 3.1, Seedance 2.0, Nano Banana, etc.) is often exposed by multiple useapi.net APIs. Request and response shapes DIFFER between APIs even for the same model — each API exposes its own native interface. Veo 3.1 via Google Flow uses a different request body than Veo 3.1 via Runway. See the Model Matrix to find which API exposes a model, then consult THAT API's documentation for its specific format. **Everything else is service-specific.** Identifier names (`jobid` / `taskId` / `musicId` / etc.), job lifecycle, response shapes, webhook payload shape, status code semantics, and synchronous-vs-asynchronous behavior vary per API. Use the per-service documentation below as the authoritative source for each API. ## Tutorials & Guides Worked, copy-pasteable tutorials (curl commands, runnable scripts, and sample output) for common tasks. Combined full text of every guide: [all tutorials (articles.txt)](https://useapi.net/assets/aibot/articles.txt). Individual guides by API: **Google Flow** - [Nano Banana 2 Lite vs 2 vs Pro: Google Flow Image Models Compared](https:/ […truncated]