Bring your own key, pay nothing here
Paste any OpenAI-compatible key, including free tiers, and both the chat and the agent are yours at no cost from us. The key stays on your device and goes straight to the provider you picked.
Tool
AI Chat & Agent
One chat that reaches both the models you already pay for and the tools in this app. Bring your own key — nothing routes through us.
Why OneBox for AI chat
Switch models mid-thread
Start a conversation on one model and continue it on another. Prompts you have saved travel with you.
A chat that can actually act
The same chat reaches the tools in this app, so it can chain several of them and hand back a result, rather than describing the steps you could take yourself.
How it works
- 1
Add an engine
In settings, paste an OpenAI-compatible endpoint and key. Free tiers from providers such as Gemini or OpenRouter work fine.
- 2
Talk, or let it work
Ask a question as usual, or describe an outcome and let the agent pick and chain the tools. Long tasks drop into picture-in-picture, so you can leave the app and come back to the result.
- 3
Keep an eye on tokens
Token usage is tracked per conversation, so a long agent run does not quietly cost more than you expected.
Inside the tool
Real screens from this module. The interface is shown in Chinese here — OneBox ships in twelve languages, English included.
AI agent
Or just say it
Tell the built-in agent what you want in plain English. It picks the right tool, runs it, and reports back — you never leave the chat.
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Summarise this PDF in five bullet points›
Compress these photos and put them into one PDF›
Have two models debate remote work and give me the verdictCommon questions
What does it cost?
Nothing from us. You supply your own API key and pay your provider directly, or use a free tier. No subscription, no markup.
Which models are supported?
Any OpenAI-compatible endpoint. That covers hosted providers, and a model running on your own network if you have one.
Do my prompts go through your servers?
No. The key is stored on your device and requests go straight to the provider you configured. We run no server in the path.
Is the agent just a chatbot?
No. It calls real tools in this app — PDFs, images, files, notes — subject to a per-tool timeout and an iteration cap, so a confused model cannot loop forever.
Get OneBox free
90+ tools, free, no ads. All processing happens on your device. Open source under Apache-2.0.