1inch

API

Decentralized exchange (DEX) aggregation API for optimal crypto swaps and liquidity data

Overview

The 1inch API provides RESTful access to DEX aggregation tools, including optimal swap quotes, liquidity source details, token metadata, and transaction execution parameters. It supports JSON responses and offers endpoints for fetching best swap rates across 40+ DEXes, checking liquidity pools, retrieving token lists, and generating swap transactions. Use cases include integrating swap functionality into crypto wallets, building trading bots, creating price comparison tools, and powering DeFi apps needing efficient cross-chain or single-chain swap data.

Example Integration (JavaScript)

script.js JS


fetch('https://1inch.io/api/')
  .then(res => res.json())
  .then(data => console.log(data))
  .catch(err => console.error(err));

Key Features

RESTful API
JSON support
DEX aggregation across 40+ sources
Cross-chain coverage (Ethereum, BSC, Polygon)
Swap quote optimization
Token metadata retrieval

Frequently Asked Questions

? Is 1inch API free to use?

Yes, it offers a free tier with rate limits; paid plans are available for higher volume and advanced features.

? Does it require an API Key?

Basic endpoints (e.g., swap quotes) do not need an API key, but advanced/high-volume uses may require authentication.

? What is the response format?

All endpoints return data in JSON format for seamless integration with most applications.

Top Alternatives

0x API Search Google

ParaSwap API Search Google

SushiSwap API Search Google

Tool Info

Pricing Freemium

Category Cryptocurrency

Platform Public API

Pros

⊕ Comprehensive liquidity data
⊕ Easy integration for DeFi apps
⊕ Real-time swap rate updates

Cons

⊖ Rate limits on free tier
⊖ Limited niche blockchain support
⊖ Requires DeFi knowledge for advanced use