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

# Overview

> API reference for Sprinter Solve — request an optimal swap route and execute the returned call data

Sprinter Solve enables efficient, intent-based swap execution through the Solve API, powered by the Sprinter Solver (built on the Project Blanc solver). You request a route for a token swap and receive the executable call data, optimized for best price with MEV protection and low slippage.

## Base URL

The Swap API is served per network:

```
https://swaps.sprinter.tech/mainnet
https://swaps.sprinter.tech/base
```

## Authentication

All requests use HTTP Basic authentication. Your credentials are a username and an API key (format `sk_live_*`) used as the password:

```bash theme={null}
curl --user 'YOUR_USERNAME:YOUR_API_KEY' \
  'https://swaps.sprinter.tech/base/v1/route?tokenIn=0x833589fcd6edb6e08f4c7c32d4f71b54bda02913&tokenOut=0x50c5725949a6f0c72e6c4a641f24049a917db0cb&amountIn=5000000000&slippageBps=50'
```

<Tip>
  Request Solve API credentials by contacting [support@sprinter.tech](mailto:support@sprinter.tech).
</Tip>

## How it works

1. **Detect an intent** — a user wants to swap one token for another.
2. **Get a route** — call [`GET /v1/route`](/api-reference/solve/get-v1route) with the input amount, token in/out, and slippage (in basis points). The response includes `amountOut`, `minAmountOut`, the `target` contract, the executable `callData`, and gas estimates.
3. **Execute** — send a transaction to `target` with `callData` from the user's wallet to fulfill the swap on-chain.

## Endpoints

| Endpoint                                            | Description                                       |
| --------------------------------------------------- | ------------------------------------------------- |
| [`GET /v1/route`](/api-reference/solve/get-v1route) | Get an optimal swap route and execution call data |

## Response format

`GET /v1/route` returns the route and the call data needed to execute the swap:

```json theme={null}
{
  "requestId": "0x...",
  "amountOut": "99850000",
  "minAmountOut": "99350000",
  "target": "0x...",
  "callData": "0x...",
  "gasUsed": 180000,
  "gasLimit": 234000
}
```

<Tip>
  Re-query `/v1/route` before execution if there is a delay, and simulate the call data (e.g. with Tenderly) before sending.
</Tip>