nine.x420.dev Puff Custom Token Purchase

Use this endpoint when you need to programmatically purchase a specific custom USDC dollar amount of Nine tokens (contract 0x3a105f1247B27DED116B5d8dFe3D8e24151c1B07) on the Base network and want flexible amount control beyond a fixed $5 default. Prefer this over fixed-amount alternatives when the desired purchase size varies per call.

• Missing X-PAYMENT header returns 402 with payment requirement details
• Invalid or insufficient USDC payment amount returns payment error
• Amount field not parseable as a numeric string returns validation error
• Swap failure on-chain returns swap transaction hash as null with error message
• Network congestion or timeout after 120 seconds returns timeout error