Pricing

All payments are USDC on Base via x402. No account, no key. Payment buys access only; it never changes a verdict.

Free check	$0: 5 live checks per client per UTC day, at most 25 per network (IP) per day across client names. Dry runs (`&mode=dry-run`) are free.
Paid check	$0.02 per check, flat, whatever the target endpoint charges. Adds full payment terms and the payment object to sign.
Payment status (after you pay)	$0.02 per lookup, flat, after the same 5 free checks per day (shared with the check, same per-network cap). `POST /v1/products/payment-status`: did your Base USDC payment land, and is it safe to sign a new one? Docs.
Hosted (integrator key)	For routers and wallets, by arrangement: an integrator key (`Authorization: Bearer 402x_live_...`) gets 1,000 free hosted checks (once), then $0.02 per check, and $0.01 for each billable check after the first 1,000 in a calendar month (UTC). Covers the check and payment status, billed on a monthly USDC invoice instead of per-call x402. How it works.
Router pack	$0.20 for 10 checks ($0.02 each), paid as one x402 payment; for registered router clients.
Catalog lookup (`/v1/lookup`)	5 free per client per UTC day, then $0.02 per call; `/v1/lookup/paid` is always $0.02.
Overnight chief-of-staff pack	$9 (`/v1/products/overnight-cos-pack`).
Free to read	Skips, receipts, Bazaar check, badges, rules, OpenAPI, MCP.

Check endpoint: https://api.402xagent.com/v1/products/endpoint-spot-check?url=<endpoint>