x402ai
x402Grade BLast checked 1 hour ago
POST https://api.x402ai.dev/api/ask
Single-turn question answering from a small local LLM (qwen3.5 2B). Best for general knowledge, definitions and simple reasoning. POST JSON {"input": string}, up to 3000 characters; returns {answer, model, elapsed_ms}. Answers are brief (2-3 sentences). Typically 5-15 s. Known limits: no web access, no memory between calls, and it can hallucinate or be wrong on recent events and obscure facts. Verify anything important.
Price$0.04per model request · paid in USD on Base
Uptime100%
4/4 probes · 520 ms
Score73Grade B
Paid usage, 30 days1payers · 3 calls
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://api.x402ai.dev/api/ask"
# HTTP/1.1 402 Payment Required: price, asset and payTo are in the responseRecent checks
| Checked (UTC) | Result | Status | Time | Live price |
|---|---|---|---|---|
| 2026-10-11 09:16 | Valid 402 | 402 | 662 ms | $0.04 |
| 2026-10-11 05:00 | Valid 402 | 402 | 534 ms | $0.04 |
| 2026-10-11 00:30 | Valid 402 | 402 | 506 ms | $0.04 |
| 2026-10-10 20:15 | Valid 402 | 402 | 488 ms | $0.04 |
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