x402engine.app
x402Not rated yetLast checked 1 hour ago
POST https://x402engine.app/api/llm/gpt-5.1
x402engine — OpenAI's efficient flagship model — strong all-around performance at lower cost than GPT-5.2
Price$0.026per model request · paid in USD on Base
Uptime100%
1/1 probes · 58 ms
Score–Needs 3 checks
Paid usage, 30 days1payers · 1 calls
Warnings
Price mismatch The live price differs from the catalogue listing.
How to buy
This endpoint takes pay-per-call payments over x402. Call it once without paying to see its live price; any x402 client then pays and retries automatically.
curl -i -X POST "https://x402engine.app/api/llm/gpt-5.1"
# HTTP/1.1 402 Payment Required: price, asset and payTo are in the responseRecent checks
| Checked (UTC) | Result | Status | Time | Live price |
|---|---|---|---|---|
| 2026-10-12 00:15 | Valid 402 | 402 | 58 ms | $0.01 |
Receipts
No test purchases yet. Graded test purchases are next on our list; until then every number here comes from unpaid checks.
What a check proves