App integration

0x

Payments & DeFi integration

DEX aggregator · DeFi · API · Cross-chain

0x provides hosted APIs for trading tokens from apps and wallets. Swap API aggregates prices from 150+ liquidity providers and returns an unsigned transaction to sign and submit, Gasless API relays gasless approvals and swaps, and Cross-Chain API returns routes across bridge providers with ready-to-sign transactions.

Related resources

crossmint

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Machine Payments Protocol SDK (wevm)

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Request Network

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Stripe Crypto Onramp

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web3-ethereum-defi

web3-ethereum-defi is a Python library for DeFi integration and data research, with wrappers for Uniswap, Aave, Chainlink, and USDC on top of web3.py. Python builders import it instead of writing those protocol wrappers themselves.