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Low-Price GPT-5.5 x402 API Gateway – Max Output Chat Completions
x402
Low-Price GPT-5.5 x402 API Gateway – Max Output Chat Completions is a paid API for AI agents from gpt55.558686.xyz, paid per call via x402, $0.523889/call, status unknown (last checked 2026-10-22).
Runs a GPT-5.5 chat completion request via x402 USDC micropayment on Base, supporting up to 128,000 output tokens per call at $0.066667
Price / call$0.523889
Success—
StatusUnknown
How this service works
GET quote and query-parameter variant for the true max-output OpenAI-compatible GPT-5.5 chat completion endpoint. Use this for directory health checks, wallets, and simple agent clients that validate x402 payment requirements before issuing a paid call. 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
Returns an OpenAI-compatible JSON chat completion object containing the assistant's message content, finish reason, token usage (prompt, completion, total), completion ID, and model name (gpt-5.5). The choices array holds the generated text under choices[0].message.content.
Example use cases
Example prompt
“Ask GPT-5.5 to write a detailed 3,000-word blog post about the future of decentralized AI — use a system prompt that says 'You are a tech journalist' and allow up to 4000 output tokens.”
Technical details
Endpoint
GEThttps://gpt55.558686.xyz/v1/chat/completions/max?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need GPT-5.5 completions with large output (up to 128k tokens) and want to pay per-call in USDC via x402 on Base without a subscription. Prefer over the compact variant when response length is expected to be substantial. Use when an OpenAI-compatible response schema is required and crypto micropayment is acceptable or preferred.
Side effects
- Payment not received or x402 USDC transaction on Base fails — returns 402 Payment Required
- Invalid or missing input query parameters — returns 400 Bad Request
- Model overload or upstream OpenAI rate limit — returns 503 or 429
- max_output_tokens exceeds 128000 — rejected by schema validation
- Network timeout on long high-token completions — returns 504 Gateway Timeout
- Malformed JSON response if upstream provider is degraded
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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