x402 LLM Gateway – Extended Tier (32K output)

Choose this endpoint when you need the maximum possible output length (up to 32,768 tokens) in a single call — such as full document drafts, long reports, or complete multi-section content. Prefer it over the quick or long tiers only when output length justifies the $0.20/call price. Ideal for agents that need no API key management and can pay per call in USDC on Base. Use the cheaper quick tier for short responses and the long tier for mid-length outputs.

• Payment failure: x402 payment not accepted or insufficient USDC balance on Base — request rejected before processing
• Invalid messages array: missing required 'role' or 'content' fields returns a 400 validation error
• Model not found: specifying an invalid model ID returns a 404 or model-not-found error
• Token clamping: max_tokens values above 32,768 are silently clamped to 32,768, not rejected — output may be shorter than expected
• Rate limiting or capacity issues on the self-hosted infrastructure may return 503 or timeout errors
• Very long prompts consuming most of the context window may leave little room for output generation