Backprompter

Build, test, and ship AI agents — no backend code.

A complete workspace to create AI agents from system prompts, chat with and evaluate them, then deploy a polished chat UI for your users — with API access, RAG, voice, and Stripe billing built in.

✍️
BuildSystem prompts, combo-agents, and a meta-router that picks the right agent per message.
🧪
TestMock users, simulated conversations, scored evaluations, and full version history.
🚀
ShipOne-click chat UI, REST API & SDK, file/RAG, voice chat, and direct Stripe payments.
🔒 Zero data retention — your prompts & outputs are never stored by the model providers

From prompt to production in three steps

No servers to configure, no boilerplate to write.

Create an app and agent in Backprompter
1 · CreateSpin up an app and define your agent with a plain-language system prompt.
Chat with and test your agent
2 · TestChat with it, simulate real users, and score responses to refine its behavior.
Deploy your agent as a chat UI or API
3 · DeployPublish a hosted chat UI or call the API & SDK — nothing to maintain.

Ship it your way

The same agents, deployed however fits your stack — from zero code to full control.

No code

Hosted chat UI

Publish a polished chat interface for your end users — no frontend or backend to build. Pick your sign-in methods and share the URL.

$ no code required
✓ live at your-app.web.app/chat
How deploying works →
Your frontend

Custom UI with the SDK

Build your own branded interface while Backprompter handles authentication, agent calls, and per-user data — no backend to run.

Backprompter.setAppKey('your-app-key');
await Backprompter.signInAnonymously();

const { response } = await Backprompter.run({
  agentId: 'support-bot',
  userPrompt: message,
});
Frontend SDK guide →
Your backend

Call agents from your server

Use a Backprompter API key from your own backend. You handle user auth however you like — Backprompter never sees your users' credentials.

const bp = new BackprompterServer({
  apiKey: process.env.BACKPROMPTER_API_KEY,
  tenantId: process.env.BACKPROMPTER_APP_KEY,
});

const { response } = await bp.run({
  agentId: 'support-bot',
  userPrompt: ticket,
});
Backend SDK guide →

Prefer to self-host? Run Backprompter locally with your own models or other providers — contact us for a quote.

Artifact