serp402
POST https://serp402.com/api/v1/search
Google search for agents, paid per call: web, news, images, videos, places, shopping and Scholar, all returned in one shape with canonicalised URLs, duplicates removed and dates normalised to ISO. Direct answers and knowledge-panel facts included when Google has them. USD 0.005 per call in USDC — no API key, no account, no subscription, no minimum. Results are retrieved through Serper (serper.dev), which is not affiliated with or endorsed by Google.
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://serp402.com/api/v1/search"
# 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 10:16 | Valid 402 | 402 | 1768 ms | $0.005 |
| 2026-10-11 05:46 | Valid 402 | 402 | 702 ms | $0.005 |
| 2026-10-11 01:15 | Valid 402 | 402 | 813 ms | $0.005 |
| 2026-10-10 21:00 | Valid 402 | 402 | 1194 ms | $0.005 |
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