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skills/crypto-api/coinbase-advanced-skill.md

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skills/crypto-api/coinbase-advanced-skill.md

name: "Coinbase Advanced Trade API" description: "Source for granular L2 Orderbook data."

Keys

Access: Access keys using
```
.env
```
file. Do not view the keys. They may be accessed for the API by accessing
```
COINBASE_API_KEY
```
and
```
COINBASE_SECRET_KEY
```
. Do not modify the keys.

Websocket Feed

Endpoint:
```
wss://advanced-trade-ws.coinbase.com
```
Channels:
- ```
level2
```
  : Full orderbook updates.
- ```
market_trades
```
  : Real-time Time & Sales.

L2 Book Construction

Snapshot: Receive initial state.
Updates: Apply
```
l2update
```
messages (quantity changes at specific price levels).
Pruning: Backend should maintain the full book for analysis, but slice
```
top_20
```
for the Frontend to minimize bandwidth.