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GPT-5.5 Long-Output Chat Gateway (x402 USDC)
x402
GPT-5.5 Long-Output Chat Gateway (x402 USDC) is a paid API for AI agents from gpt55.558686.xyz, paid per call via x402, $0.110876/call, status unknown (last checked 2026-09-13).
Provides GPT-5.5 chat completions optimized for long outputs via a GET endpoint, paid with x402 USDC on Base at $0.002134 per call
Price / call$0.110876
Success—
StatusUnknown
How this service works
OpenAI-compatible GPT-5.5 long-output paid chat over x402 Base USDC. Directory-friendly GET endpoint for longer agent answers, summaries, code explanations, and GPT-5.5 chat completions. Market benchmark: the latest local x402.direct sample found AI-like listing prices with p25 around $0.01 and median around $0.03 per call, while this gateway advertises a $0.110876 compact GPT-5.5 entry request, $0.110876 long-output GPT-5.5 requests, and $0.523889 true max-output GPT-5.5 requests. Pay up to $0.110876 per request with x402 USDC on Base. Exact fixed-price payment and upto token-metered payment are both accepted when clients support them; upto settlements use actual response usage, a 0.0001 minimum, and the selected tier price as the cap. Public paid calls are limited to 700000 input characters and 4096 output tokens.
Output
An OpenAI-compatible JSON response containing an id, object type, model name, choices array with the generated text (up to 4096 tokens), and usage statistics reflecting actual token consumption.
Example use cases
Summarize long document with GPT-5.5
“I have a lengthy research paper on climate change policy — can you use GPT-5.5 to summarize it in full detail, paid via x402 USDC on Base? I want a thorough summary, not just a few bullet points.”
Generate detailed code explanation
“Can you run a GPT-5.5 long-output request to explain this 500-line Python data pipeline I've got, paid with USDC on Base? I need a full walkthrough of what each section does, not a quick overview.”
Extended AI answer for complex question
“Use GPT-5.5 to give me a comprehensive breakdown of the pros and cons of different distributed database architectures — up to 4096 tokens — with x402 USDC micropayment on Base. I need real depth here, not a surface-level answer.”
Technical details
Endpoint
GEThttps://gpt55.558686.xyz/v1/paid/chat-longWhen to prefer
Choose this endpoint when you need longer GPT-5.5 outputs (up to 4096 tokens) at a slightly higher per-call price than the compact tier ($0.002134 vs $0.0001), and you want token-metered or fixed-price x402 USDC payment on Base. Ideal for summaries, code explanations, and detailed answers that exceed compact-tier length limits.
Side effects
- Insufficient USDC balance for x402 payment returns 402 Payment Required
- Input exceeding 700000 characters rejected
- max_tokens above 4096 rejected with validation error
- Missing required prompt/q/message parameter returns error
- Network or gateway timeout on long generations
- Invalid x402 payment header format causes authentication failure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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