10FI Developer Docs

10FI is a gasless DEX-aggregator API for wallets, merchants and apps. Use one API for EVM swaps, Solana swaps and cross-chain routes, with a flat 0.1% platform fee collected on the swap chain in the swap token.

Base URL	https://api.10fi.org
Authentication	X-Client-Id + X-API-Key for developer API calls. /v1/health is open.
Free tier	60 requests/minute, 1,000/day, 30,000/month.
Chains	ethereum, bsc, polygon, arbitrum, base, solana, tron. Tron is cross-chain only.

Start here

1. Sign up at business.10fi.org/business/signup.
2. Complete email OTP and mobile OTP.
3. Create a project in the dashboard and generate an API key. The API key is shown once.
4. Call the quickstart to quote, build, sign and submit a swap.

Response modes

Gasless swaps return { type:"delta", toSign, chainId, quote }. The user signs the typed data, then your app submits the signature to /v1/submit. On-chain swaps return { type:"onchain", tx, quote }. Solana swaps return a base64 transaction for Phantom/Solflare.