> ## Documentation Index
> Fetch the complete documentation index at: https://docs.b3os.org/llms.txt
> Use this file to discover all available pages before exploring further.

# 0x Price Quote

Get a live swap price quote from 0x Protocol without executing anything. Returns how much of the output token you'd receive for a given input amount.

![0x Price Quote logo](https://cdn.b3.fun/b3os-icons/0x.png)
Catalog action EVM Onchain

Get a live swap price quote from 0x Protocol without executing anything. Returns how much of the output token you'd receive for a given input amount.


## At a Glance

| Field | Value |
| --- | --- |
| Action ID | `0x-quote` |
| Category | EVM Onchain |
| Connector | Not required |
| Requires gas | No |
| Funds movement | None declared |
| Tags | `blockchain`, `evm`, `dex`, `swap`, `defi` |

## Payload Schema

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `sellToken` | `string` | Yes | Token address to sell. Use 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE for native ETH. |
| `buyToken` | `string` | Yes | Token address to buy. Use 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE for native ETH. |
| `sellAmount` | `string` | Yes | Amount to sell in smallest unit \(wei for ETH\). Must be a positive integer string. |
| `chainId` | `number` | Yes | Chain ID \(e.g., 1 for Ethereum, 8453 for Base, 42161 for Arbitrum\) |
| `slippageBps` | `number` | No | Slippage tolerance in basis points \(100 = 1%\). Default is 100 \(1%\). Max 5000 \(50%\). |

## Result Schema

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `buyAmount` | `string` | Yes | Amount of buy token received in smallest unit |
| `sellAmount` | `string` | Yes | Amount of sell token spent in smallest unit |
| `buyToken` | `string` | Yes | Address of the buy token |
| `sellToken` | `string` | Yes | Address of the sell token |
| `estimatedGas` | `string` | No | Estimated gas for the swap |
| `price` | `number` | Yes | Effective price \(buyAmount per sellAmount ratio from API\) |

## Examples

**Workflow node**

```json
{
  "type": "0x-quote",
  "payload": {
    "sellToken": "0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE",
    "buyToken": "0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE",
    "sellAmount": "1000000",
    "chainId": 8453
  },
  "children": []
}
```
  **Test with API**

```bash
curl -X POST "https://api.b3os.org/v1/actions/0x-quote/test" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "inputs": {
    "sellToken": "0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE",
    "buyToken": "0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE",
    "sellAmount": "1000000",
    "chainId": 8453
  }
}'
```

**Use expressions for dynamic values**

Payload fields can use workflow expressions such as `{{$trigger.body.amount}}`, `{{$nodes.fetch.result.price}}`, and `{{$props.asset}}` when the value should come from a trigger, prior node, or reusable workflow prop.