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GPT-5.5 True Max-Output Paid Chat (x402 USDC, GET)
x402
GPT-5.5 True Max-Output Paid Chat (x402 USDC, GET) is a paid API for AI agents from gpt55.558686.xyz, paid per call via x402, $0.523889/call, status unknown (last checked 2026-09-14).
Generates long-form GPT-5.5 chat completions via a GET endpoint with up to 128,000 output tokens, paid per-request in USDC over the x402 protocol on Base.
Price / call$0.523889
Success—
StatusUnknown
How this service works
OpenAI-compatible GPT-5.5 true max-output paid chat over x402 Base USDC. Directory-friendly GET endpoint for long-form generation, large agent responses, and max-output 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 $0.523889 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 128000 output tokens.
Output
An OpenAI-compatible chat completion JSON object containing a completion ID, model name, an array of choices with the generated message content, and a usage object showing prompt tokens, completion tokens, and total tokens consumed.
Example use cases
Example prompt
“Using the max-output GPT-5.5 gateway, write me a comprehensive 50-page technical architecture document for a distributed microservices system — use the prompt 'Design a full distributed microservices architecture with security, scalability, and observability' and allow up to 128000 output tokens.”
Technical details
Endpoint
GEThttps://gpt55.558686.xyz/v1/paid/chat-maxWhen to prefer
Choose this endpoint when you need the absolute maximum output length from GPT-5.5 (up to 128,000 tokens) for long-form generation tasks such as large documents, detailed reports, or multi-step agent responses, and you are paying via x402 USDC on Base. Prefer this over the compact or long-output tiers when output length is the priority and cost per call up to $0.066667 is acceptable.
Side effects
- Payment insufficient or missing — x402 payment header not provided or below $0.066667 cap
- Prompt exceeds 700,000 input character limit — request rejected
- max_tokens value out of range (must be 1–128,000) — validation error
- Upstream GPT-5.5 model unavailable or rate-limited — 503 or gateway error
- Malformed query parameters — missing required 'q', 'prompt', or 'message' field returns error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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