> For the complete documentation index, see [llms.txt](https://quick-ai.gitbook.io/qai-x402-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://quick-ai.gitbook.io/qai-x402-docs/services/readme.md).

# Overview

Quick AI operates three paid HTTP APIs on **Base mainnet** (`eip155:8453`), settled in **USDC** via the Coinbase **CDP x402** facilitator. Agents discover and pay through standard **x402 v2** flows (for example `awal` or the CDP SDK) and **Bazaar** discovery metadata for marketplaces such as [agentic.market](https://agentic.market).

| Service             | URL                            | Role                                       |
| ------------------- | ------------------------------ | ------------------------------------------ |
| **Eagle Eye**       | <https://eagle.quickai.build>  | U.S. sanctions + USDC blacklist screening  |
| **Quick Signal TA** | <https://signal.quickai.build> | Crypto technical analysis (10 indicators)  |
| **Quick ZK Auth**   | <https://zk.quickai.build>     | Wallet ownership (ZK) + USDC qualification |

## Shared stack

* Node.js 20, Express, TypeScript
* `@x402/express` + `@coinbase/x402` facilitator
* Bazaar extensions with HTTP `method` declared at registration (POST or GET)
* Caddy reverse proxy, TLS, `X402-Version: 2`
* Docker Compose on VPS
* Settlement wallet: `PAY_TO_ADDRESS` (Base USDC)

## Typical agent pipeline

```
ZK Auth (economic identity) → Eagle Eye (compliance) → Signal (market intel) → action
```

## Documentation

* [Eagle Eye](/qai-x402-docs/services/eagle-eye.md)
* [Quick Signal TA](/qai-x402-docs/services/quick-signal-ta.md)
* [Quick ZK Auth](/qai-x402-docs/services/quick-zk-auth.md)
* [x402 & Bazaar integration](/qai-x402-docs/guides/x402-bazaar.md)
* [Composing the stack](/qai-x402-docs/guides/composing-the-stack.md)

## Repository layout

| Path               | Service                |
| ------------------ | ---------------------- |
| `eagle-eye/`       | Eagle Eye v1.0.0       |
| `quick-signal-ta/` | Quick Signal TA v3.1.0 |
| `quick-zk-auth/`   | Quick ZK Auth v1.0.1   |


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