GPT-5.5 Compact Chat x402
Pay-per-call endpoint from gpt55. Price per call: $0.100 (USDC, x402).
Proof
endpoint (shown as text, not a link, to avoid accidental calls):
https://gpt55.558686.xyz/v1/chat/completions“HTTP 402 + x402 v2 challenge: amount 99995 atomic units of USD Coin (= $0.099995)”
Details
- Price per call
- $0.100 (USDC, x402)
- Provider
- gpt55
- Protocol
- x402 · USDC (Base)
- Method
- POST
- Price basis
- USDC amount in the unpaid HTTP 402 payment challenge (first accepted option)
- Last probed
- 2026-10-17
More in Pay-per-call APIs
- AgentReady AI Search Visibility Audit
- Assess the security risk of a cross-chain bridge before routing funds through it...
- Crinkl Campaign Fit Estimate
- DYOE Know Your Agent
- Invoice PDF Generator - JSON to Finished Professional Invoice, No Account Needed
- Loophole Tape: $0.10 trial key
- OZ Evidence Research
- RxAtlas: Search drug products