"method" : "POST" , "content_type" : "application/json" ,
"price_usd" : 0.001 , // 1000 atomic USDC (6 decimals)
"network" : "eip155:8453" , // Base mainnet
"asset" : "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913" , // USDC
"payTo" : "0xc22f9CAEBAc37fE72D5142f35f21f6696Ea9Ef69" ,
"you_provide" : { // JSON body fields
"chain" :
optional
string
★
Value for `chain`.
Optional · string
one of "evm", "solana", "bitcoin", "auto" · default "auto"
<CHAIN>
evm solana bitcoin auto
"check_code" :
optional
boolean
★
Value for `check_code`.
Optional · boolean
default false
<CHECK_CODE>
true false
use example values clear
},
"request_body" : // live, from your inputs
{
"address": "0x742d35cc6634c0532925a3b844bc9e7595f0beb0"
}
"you_get" : { // HTTP 200 application/json after payment
"output_schema" :
{
"type": "object",
"properties": {
"ok": {
"type": "boolean"
},
"skill": {
"type": "string"
},
"service": {
"type": "string"
},
"version": {
"type": "string"
},
"summary": {
"type": "string"
},
"data": {
"type": "object",
"properties": {
"valid": {
"type": "boolean"
},
"chain": {
"type": "string"
},
"checksum_ok": {
"type": "boolean"
},
"checksummed": {
"type": "string"
},
"is_zero": {
"type": "boolean"
},
"type": {
"type": "string"
},
"notes": {
"type": "array",
"items": {
"type": "string"
}
}
}
},
"confidence": {
"type": "number"
},
"sources": {
"type": "array",
"items": {
"type": "object",
"properties": {
"name": {
"type": "string"
},
"url": {
"type": "string"
},
"fetched_at": {
"type": "string"
}
}
}
},
"generated_at": {
"type": "string"
},
"data_as_of": {
"type": "string"
},
"charged": {
"type": "boolean"
},
"warnings": {
"type": "array"
},
"next": {
"type": "array",
"items": {
"type": "string"
}
}
},
"required": [
"ok",
"skill"
]
}
"example" :
{
"ok": true,
"skill": "address_validate",
"service": "address_validate",
"version": "1.0.0",
"summary": "valid evm checksummed=0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0",
"data": {
"valid": true,
"chain": "evm",
"checksum_ok": true,
"checksummed": "0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb0",
"is_zero": false,
"type": "unknown",
"notes": [
"all-lowercase or all-uppercase: EIP-55 not asserted"
]
},
"confidence": 1.0,
"sources": [
{
"name": "local",
"url": "eip-55+base58+bech32",
"fetched_at": "2026-10-24T14:00:00Z"
}
],
"generated_at": "2026-10-24T14:00:00Z",
"data_as_of": "2026-10-24T14:00:00Z",
"charged": true,
"warnings": [],
"next": [
"erc20_meta",
"name_resolve",
"token_risk"
]
}
},
"flow" : [
POST https://grokzilla.shop/api/skills/address-validate with the JSON body, no payment header
← 402 Payment Required + PAYMENT-REQUIRED header: base64 JSON {x402Version: 2, accepts: [{scheme: "exact", network: "eip155:8453", asset: USDC, amount: "1000", payTo}]} (same JSON in the body)
your x402 client checks amount ≤ $0.001 and signs a USDC transfer authorization to payTo with your wallet
retry the same POST with PAYMENT-SIGNATURE: <base64> (x402 v2) or X-PAYMENT (v1 clients)
← 200 OK with the result JSON + PAYMENT-RESPONSE header (base64 settlement receipt, tx hash on Base)
],
"copy" : { // fills in from your inputs as you type
"curl" // unpaid: shows the 402 copy
"agentcash" // pays from your AgentCash wallet copy
},
"try" : // POSTs unpaid to /api/skills/address-validate on this host and decodes the 402. Never pays.
Send unpaid request
}