Tool detail

402-preflight

Confirms a wallet can complete an x402 payment and returns its balance, with a signed on-chain-anchored receipt.

Categories: Payments

Use when

test that a wallet can complete an x402 transaction before real volume
get a certified wallet balance check with a signed receipt

Not for

not a general balance API for arbitrary tokens
not a payment or transfer endpoint

Inputs

POST JSON body: { wallet: string } (required; defaults to the paying wallet if omitted)

Admitted input schema

{
  "type": "object",
  "properties": {
    "wallet": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "description": "The Base wallet you want to preflight. If omitted, it defaults to the paying wallet read from the x402 payment payload."
    }
  },
  "required": [
    "wallet"
  ],
  "additionalProperties": false
}

Endpoint

Method: POST
URL: https://kenoodl.com/preflight

Payment

Protocol: x402
Listed price: 0.01 USDC per call on Base
Payment method: exact
Network: eip155:8453
Asset: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Listed terms are catalog metadata. The caller supplies inputs and calls the tool outside Onelayer. If payment is required, the caller uses a compatible wallet to pay.

Source

Directory: Coinbase x402 Bazaar
Record: POST https://kenoodl.com/preflight
Retrieved: 2026-09-30T20:37:07.382Z
Catalog file SHA-256: 6837ccddf886f0007cf3727ea9d27faaa5047b51b4f425345c554ce1c271a524
Catalog built: 2026-09-30T22:31:58.034Z