Check credits
An operator-issued credit sent as X-402Signal-Trial. Runs checks against listed endpoints without a funded wallet: 5 checks over 48 hours by default, up to 1,000 over 30 days on request.
Pricing
Pay per check. Pay nothing for a check that finds nothing.
One price for the permissionless path, paid with the same wallet your agent already holds. Platform plans are priced on the receipts you issue and the records you keep, because that is what you come back for.
Per check
$0.003 USDC
Per qualifying hosted check.
No subscription. No account.
A qualifying check is one that finds a live, payable offer that meets your rules and returns the selected terms, with a signed receipt when you ask for require_route_binding. Completed no-match checks are free: live: false with a typed reason costs nothing and settles nothing.
A hosted session open costs $0.005 USDC and reuses one observation for 20 hops or 10 minutes. Hops inside that window do not charge another 402Signal fee and do not call a facilitator. Supported session continuation does not buy another observation for every call.
Catalog search, listed-endpoint validation, the endpoint pages, the offline buyer checks and receipt verification carry no 402Signal fee.
Paid on Base, Solana or Algorand MainNet over x402, from the wallet that will pay the seller. Billing states and uncertain outcomes · Supported profiles and release status
Platforms and wallet operators
Priced on receipts and records, not on checks.
If you embed the check in a client, an agent runtime or a wallet, the per-check fee is the on-ramp and the plan covers what a platform needs afterwards: receipts issued per month, a retention window for the records behind them, export, and change alerts on the sellers your customers depend on.
| Plan | What it covers | Price |
|---|---|---|
| Permissionless | Every check paid at the time of the check with your own wallet. Receipts returned to you; you keep them. | $0.003 per qualifying check |
| Design partner | One quarter for up to five platforms: the hook in your client, an admission key, check credits for your evaluation, change alerts, and a monthly readiness report for the sellers you route to. In return: a logo, a reference, and feedback on the record format. | Free for the quarter |
| Platform | An admission key with agreed ingress and capacity, receipts issued per month, records retained for an agreed window with evidence export, change alerts with signed webhooks, and a named contact. | Monthly, quoted on receipts issued and retention window |
Write to ross@402signal.com with your expected monthly checks and the retention you need. Plans are invoiced monthly; there is no self-serve billing yet.
Evaluate first
Credits for trying, keys for capacity.
Admission key
A customer key sent as X-402Signal-Key. It carries agreed ingress and unpaid capacity, and it is what lets you subscribe to change alerts. It is a workload identity, never a wallet key.
Your own balance
GET /keys/usage with either header returns the remaining credits, the ceiling and the expiry, or whether the key is recognized and the capacity it carries. It answers only for the credentials you present.
Wallet-free sample
The unpaid readiness check runs the real observation against a catalog-listed endpoint and shows the current answer. Nothing is charged.
Try a sample checkWhat the fee is and is not
One fee, clearly bounded.
- Seller charges, deposits, network fees and rent are separate from the checking fee and are paid by your wallet to the seller directly.
- A later buyer refusal does not reverse an already-settled check. A qualifying offer is not a guarantee of delivery or output quality.
- If a settlement ends in an unknown state, never reuse that authorization; use the read-only recovery contract and reconcile.
- Nothing a seller pays for changes the public endpoint data. Alerts and readiness pages read the same observations for everyone.