How to integrate token swaps in a Flutter app?

Grab swapapi.dev, model responses in Dart, hit the /swap endpoint, sign with web3dart. Tutorial code gets you 80% there — add retries.

What chains does swapapi.dev support?

46 EVMs: ETH, Polygon, Arbitrum, Base, Optimism — full list in docs.

Free and easy, but centralized. Fine for side quests; stack verifications for real money. Word count: ~950.

🛠️ Developer Tools

Your button glows: 'Swap Now.' User taps. Tokens flip. No nodes, no fuss. But who's really holding the keys?

theAIcatchup Apr 10, 2026 4 min read

Swapapi.dev simplifies Flutter DeFi swaps — free, no keys, 46 chains. 𝕏
Centralization risks loom: treat as MVP tool, not production oracle. 𝕏
Unique insight: Easy APIs will flood app stores with mediocre swap features by 2026. 𝕏

Published by

Community-driven. Code-first.

#DeFi integration #Flutter #evm chains #flutter token swaps #swapapi.dev #token swaps

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Originally reported by Dev.to