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  1. Sign in at build.route.fun, name your workspace and create an API key.
  2. In payout settings, register your generated builder ID, payout wallet and fee onchain.
  3. Request a builder quote, then prepare the swap with the same key.
  4. Let the user review, approve and sign. Verify the receipt afterward.
Builder fees are separate from Route fees and capped at 50 bps (0.5%). Omit builderFeeBps to use the registered default. Amounts use token base units; amountOut is after both fees. Keep API keys on your backend. The public builderCode is attribution, not authentication. Quotes and preparations belong to the key that requested them; workspace keys share plan limits. Builder settlement currently supports ordinary EOA wallets. Delegated and contract wallets are not supported yet. Swap example · Plans · Experimental widget