What are the best swap APIs for Web3 wallet developers?

Swap API tops for no-key, 46-chain coverage and instant calldata. 1inch follows for liquidity depth on majors.

Does 1inch require an API key for swap API?

Yes, even free tier needs registration – prototyping slowdown.

Is Swap API free for production wallet use?

Yep, 30 req/min per IP, no billing, scales fine for most wallets.

Swap APIs: The Wallet Killer Feature You're Probably Getting Wrong

Your Web3 wallet's swap button could be a money pit or a user magnet. Pick the wrong API, and you're stuck with single-chain swaps while competitors rake in fees across 46 chains.

theAIcatchup Apr 09, 2026 4 min read

Comparison chart of top 5 swap APIs for Web3 wallet developers including latency and chain support

⚡ Key Takeaways

Swap API wins for zero-friction integration across 46 EVM chains – prototype in one curl. 𝕏
Paid giants like 1inch offer better liquidity but add key hurdles and fees. 𝕏
Focus on tx-ready calldata and RPC bundles to slash user drop-off. 𝕏

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#1inch API #DEX aggregator #DEX aggregators #multi-chain swaps #swap APIs #wallet development #web3-wallets

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Originally reported by dev.to

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