Google Flow API examples (useapi.net)

Name: google-flow-api
Author: useapi

Runnable Node.js and Python examples for the Google Flow API by useapi.net — generate Veo 3.1 video, Gemini Omni Flash audio-native video, and Nano Banana 2 Lite / Nano Banana 2.1 / Nano Banana Pro images through a simple REST API that drives your own Google Flow subscription (no Google Cloud project, API key, or per-call metering).

Each example ships JavaScript and Python implementations (.mjs and .py) driven by a prompts.json you edit. Most are batch runners: they submit every prompt in the file and download every result, so you can queue a batch and come back to the winners. ugc-product-video/ is a pipeline instead — it chains six endpoints into one finished video, checkpointing as it goes.

Example	What it does	Tutorial	Tutorial date
`veo-video/`	Batch-generate Veo 3.1 video — text-to-video, first/last-frame image-to-video	Generate Veo 3.1 video via curl	June 15, 2026 (October 5, 2026)
`images/`	Batch-generate images with Nano Banana 2 Lite (default), Nano Banana 2.1, Nano Banana Pro	Generate images via curl	June 15, 2026 (October 5, 2026)
`nano-banana-compare/`	Run one prompt through all three Nano Banana models (2 Lite, 2.1, Pro) and compare	Nano Banana 2 Lite vs 2.1 vs Pro compared	July 2, 2026 (October 5, 2026)
`omni-flash/`	Batch-generate Gemini Omni Flash audio-native video — text-to-video, first/last-frame image-to-video, reference-to-video, video-to-video edit	Generate Omni Flash video via curl	June 15, 2026 (October 5, 2026)
`ugc-product-video/`	Build a whole UGC product video — product sheets, a presenter, one still, an Omni 1.1 Flash clip per product, upscaled and joined	Make a UGC product video	September 4, 2026
`n8n/`	Ready-to-import n8n workflow: a form that generates Veo 3.1 video or Nano Banana Pro images and returns the files	n8n template #19991	September 28, 2026
`n8n/ugc-ad-factory.json`	Ready-to-import n8n form workflow that builds a whole UGC video ad with Omni 1.1 Flash: pick or re-roll at every step, upload your own product photos, 1–5 products, 1080p	Make UGC video ads in n8n	October 3, 2026
`skills/omni-flash-video/`	Agent skill for Claude Code, Codex and Cursor: ask for a clip and the agent makes it with Omni 1.1 Flash or Veo 3.1 (dialogue, voices, reference images, first/last frames) and downloads the `.mp4`. Install: `npx skills add useapi/google-flow-api --skill omni-flash-video`	SKILL.md

Quick start

You need Node.js v21 or newer or Python 3.x (neither has any dependencies to install), a useapi.net API token, and a connected Google Flow account (one $15/month subscription covers every useapi.net API):

git clone https://github.com/useapi/google-flow-api.git
cd google-flow-api/veo-video
node ./google-flow.mjs <API_TOKEN> <EMAIL>
# or, equivalently, with Python:
python3 ./google-flow.py <API_TOKEN> <EMAIL>

Edit prompts.json in each folder to queue your own prompts. Every supported parameter is documented on the POST /videos and POST /images endpoint pages.

Common questions

Does Google Flow have an official API or API key? No. Flow is a web app only, and Google doesn't issue a Google Flow API key. Veo 3.1, Omni 1.1 Flash and Nano Banana are sold separately on the metered Gemini API (Omni since June 30, 2026, about $0.10 per second of 720p video). This API drives your own Flow account instead.
So what do I use as the API key? A useapi.net API token. Then connect your own Google account once through the Google Flow setup: sign in with Google, with no cookies to copy and no Google Cloud project or Gemini API key. The only other key is a captcha provider's, which you add once the 300 free solves on your first account run out.
What does the Google Flow API cost? A flat $15/month to useapi.net, which covers 3 Google Flow accounts and every other useapi.net API, plus the Google AI plan you already have. Images work even on a free Google account, and video spends your plan's Flow credits. For an 8-second clip, the official Gemini API charges $0.80 for Veo 3.1 Fast, $3.20 for Veo 3.1 Quality, $0.40 for Veo 3.1 Lite and about $0.81 for Omni 1.1 Flash at 720p. Through Flow, the same clips cost about $0.40, $2.00, $0.20 and $0.24 in credits on the Pro plan, or $0.10, $1.00, $0.05 and $0.12 on the Ultra $99 plan (less on Ultra $199). A Nano Banana Pro image is $0.134 on the Gemini API and included in Flow. Captcha solves cost about $0.80–$3.00 per 1,000 through your own provider. See the pricing comparison.
More answers: Google Flow API questions.

中文说明

这是 useapi.net 托管的 Google Flow API 示例代码（Node.js 与 Python）。通过 REST API 调用 Veo 3.1 视频、Omni Flash 带音频视频，以及 Nano Banana 2 Lite / Nano Banana 2.1 / Nano Banana Pro 图片生成。

使用你自己的 Google 账号和 Google AI 订阅，已支持新域名 flow.google.com。
无需 Google Cloud 项目或 Gemini API Key，无需自己部署服务或维护浏览器。
账号通过自动化浏览器流程绑定，登录 Google 即可，无需手动复制 Cookie。
reCAPTCHA 由服务端自动处理（首个账号赠送 300 次免费打码，之后接入你自己的打码服务）。
价格：useapi.net 每月 15 美元（含 3 个 Google Flow 账号及所有其他 API），加上你已有的 Google AI 订阅。图片生成在免费 Google 账号上也可使用。

中文教程（Veo 3.1、Omni 1.1 Flash、Nano Banana Pro，含价格对比与示例）：如何通过 Google Flow API 调用 Veo 3.1、Omni 1.1 Flash 和 Nano Banana Pro。快速开始见上方 Quick start，完整文档：Google Flow API。

About useapi.net

useapi.net is an experimental REST API for AI services. The Google Flow API drives your own Google Flow / Google AI subscription, so you spend your plan's credits at consumer rates instead of metered developer-API pricing. See the model matrix and the pricing comparison on the API overview.

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License

The example code in this repository is released under the MIT License. It covers the example scripts only, not the useapi.net service or API.