Grounded chat (web search,
POST https://agent402.tools/v1/grounded/chat/completions
OpenAI-compatible chat completions GROUNDED in a live web search on every call: the gateway runs an Exa search (up to 5 results) for the prompt, hands the results to the model, and returns the answer with url_citation annotations - $0.03 per call in USDC, no API key, no signup. Model is chosen server-side like the auto tier (omit "model" or send "auto"; explicit ranked models accepted); the response adds agent402_router {category, quality, served}.
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://agent402.tools/v1/grounded/chat/completions"
# 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 11:46 | Valid 402 | 402 | 673 ms | $0.03 |
| 2026-10-11 07:15 | Valid 402 | 402 | 353 ms | $0.03 |
| 2026-10-11 02:46 | Valid 402 | 402 | 514 ms | $0.03 |
| 2026-10-10 22:30 | Valid 402 | 402 | 104 ms | $0.03 |
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