# NanoBrain AI Chat

> NanoBrain AI Chat is a paid API for AI agents from nanobrain-alpha.vercel.app, paid per call via x402, $0.01/call, status down (last checked 2026-09-15).

Sends a chat message to the NanoBrain AI and returns an AI-generated conversational response

## Facts

- Endpoint: POST https://nanobrain-alpha.vercel.app/api/chat
- Price: $0.01/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/nanobrain-alpha-vercel-app-ac64a98d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AHn9TFig-GmcemxkM3YoV

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability nanobrain-alpha-vercel-app-ac64a98d -d '<json body>'
```

Example prompt: Ask NanoBrain AI: what are the main differences between supervised and unsupervised machine learning, and can you give me a practical example of each?

## When to prefer this

Choose this endpoint when you need a lightweight, pay-per-call AI chat interaction at low cost ($0.01 USDC), particularly within Web3/crypto-native agent pipelines that already support x402 payment protocol. Suitable for single-turn or multi-turn conversational queries where the NanoBrain AI model is specifically desired.

## Known failure modes

- Payment not included or insufficient — endpoint requires $0.01 USDC via x402 protocol
- Malformed or missing message body — returns 400 error
- Service unavailable on Vercel deployment — returns 503 or timeout
- Empty or null message input — may return error or empty response

## How this service works

Chat with NanoBrain AI

## Output

Returns an AI-generated text response to the input message, typically a conversational reply or answer to the user's query.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/nanobrain-alpha-vercel-app-ac64a98d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nanobrain-alpha.vercel.app](https://www.zero.xyz/host/nanobrain-alpha.vercel.app/llms.txt)