Speeding Up Quotes

By default, the Biconomy API performs an exhaustive query across all underlying liquidity providers (DEXs, aggregators, bridges) to find the optimal route for your swap. While this ensures the best possible price, it takes longer to respond. For applications where speed is more important than finding the absolute best price, you can use fast-quote mode to get the first viable quote immediately.

Using Fast-Quote Mode

Add routeSelectionMode: "fast-quote" to the data field of your request:

const quote = await fetch('https://api.biconomy.io/v1/quote', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    mode: 'eoa',
    ownerAddress: userAddress,
    composeFlows: [{
      type: '/instructions/intent-simple',
      data: {
        srcChainId: 8453,
        dstChainId: 42161,
        srcToken: USDC_BASE,
        dstToken: ETH_ARBITRUM,
        amount: '100000000',
        slippage: 0.01,
        routeSelectionMode: "fast-quote"  // Return first viable quote
      }
    }]
  })
});

Comparison

Mode	Behavior	Response Time	Price Optimization
Default	Queries all providers, compares routes	Slower	Best price guaranteed
fast-quote	Returns first viable route	Faster	Good price, not necessarily optimal

When to Use Fast-Quote

Good For

Real-time price displays
Quick previews in UI
High-frequency quote refreshes
Time-sensitive applications

Consider Default For

Large trade amounts
Final execution quotes
Price-sensitive users
Low-frequency requests

Best Practice: Preview Then Execute

A common pattern is to use fast-quote for UI previews, then fetch a full quote before execution:

// Fast quote for immediate UI feedback
const previewQuote = await getQuote({
  ...params,
  data: { ...data, routeSelectionMode: "fast-quote" }
});

// Show preview to user
displayQuote(previewQuote);

// When user clicks "Swap", get optimized quote for execution
const executionQuote = await getQuote({
  ...params
  // No routeSelectionMode = exhaustive search
});

// Execute with best price
await executeQuote(executionQuote);

Fast-quote mode typically reduces response times significantly, especially for cross-chain swaps where multiple bridge providers need to be queried.

Introduction Gasless Swap

⌘I

Getting Started

Tutorials

Using Fast-Quote Mode

Comparison

When to Use Fast-Quote

Good For

Consider Default For

Best Practice: Preview Then Execute

​Using Fast-Quote Mode

​Comparison

​When to Use Fast-Quote

Good For

Consider Default For

​Best Practice: Preview Then Execute

Using Fast-Quote Mode

Comparison

When to Use Fast-Quote

Best Practice: Preview Then Execute