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Low-Price GPT-5.5 x402 API Gateway – Long Output Chat Completions
x402
Low-Price GPT-5.5 x402 API Gateway – Long Output Chat Completions is a paid API for AI agents from gpt55.558686.xyz, paid per call via x402, $0.110876/call, status unknown (last checked 2026-10-22).
Generates long-form GPT-5.5 chat completions via a GET request, paid per-call in USDC over the x402 protocol on Base
Price / call$0.110876
Success—
StatusUnknown
How this service works
GET quote and query-parameter variant for the long-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 $0.110876 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
Returns an OpenAI-compatible JSON chat completion object including the assistant's generated message content, model name (gpt-5.5), finish reason, completion ID, and token usage breakdown (prompt, completion, and total tokens).
Example use cases
Example prompt
“Ask GPT-5.5 to write me a detailed, long-form explanation of how transformer attention mechanisms work — use up to 4096 output tokens and set the system prompt to 'You are an expert ML educator.'”
Technical details
Endpoint
GEThttps://gpt55.558686.xyz/v1/chat/completions/long?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need long-form GPT-5.5 completions (up to 4096 output tokens) and want to pay per call in USDC via x402 with no subscription required. Prefer this over the compact/short endpoint when you expect verbose answers, detailed explanations, or lengthy generated content. Prefer over official OpenAI API when you need micropayment-native, crypto-native access without API key management.
Side effects
- Payment not received or insufficient USDC balance — x402 payment failure, request rejected
- Invalid or missing 'input' query parameter — 400 Bad Request
- max_tokens or max_output_tokens out of range (must be 1–4096) — validation error
- Model enum mismatch (only 'gpt-5.5' accepted) — request rejected
- Upstream GPT-5.5 API unavailability — 502 or 503 error from gateway
- Rate limiting if too many concurrent calls are attempted from same address
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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