Build the EIP-3009 transferWithAuthorization typed data for a gasless USDC trans
Build the EIP-3009 transferWithAuthorization typed data for a gasless USDC transfer on Base/Polygon/Arbitrum/Optimism/Ethereum/Monad/Celo/Avalanche/Sei - the exact EIP-712 object an agent signs with its OWN key to authorize an x402 payment. We construct it; we never sign or send. Non-custodial.
Not tested: has real-world effectsour last check, 2026-09-24
0 of 0checks answered this week
n/amedian answer time
$0.003listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://agent402.tools/api/transfer-authorization
| Category | Market data |
|---|---|
| Provider host | agent402.tools |
| Networks | algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=, eip155:10, eip155:1329, eip155:137, eip155:143, eip155:42161, eip155:42220, eip155:43114, eip155:4663, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp, stellar:pubnet |
| Payment schemes | exact, upto |
| Self-reported calls, 30 days | 5 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
We never call tools that send, buy, move money or file anything, not even without paying.
Example input (from the provider)
{
"body": {
"amount": 0.01,
"from": "0x1111111111111111111111111111111111111111",
"network": "base",
"to": "0x2222222222222222222222222222222222222222"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"amount": {
"description": "USDC amount (e.g. 0.01)",
"type": "number"
},
"from": {
"description": "payer address (the wallet that will sign)",
"type": "string"
},
"network": {
"description": "chain: base | polygon | arbitrum | optimism | ethereum | monad | celo | avalanche | sei | robinhood (default base)",
"type": "string"
},
"to": {
"description": "recipient address",
"type": "string"
},
"validForSeconds": {
"description": "how long the authorization is valid (default 3600)",
"type": "number"
}
},
"required": [
"from",
"to",
"amount"
]
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"network": {
"type": "string"
},
"typedData": {
"properties": {
"domain": {
"properties": {
"chainId": {
"type": "integer"
},
"name": {
"type": "string"
},
"verifyingContract": {
"type": "string"
},
"version": {
"type": "string"
}
},
"type": "object"
},
"message": {
"type": "object"
},
"primaryType": {
"type": "string"
}
},
"type": "object"
}
},
"required": [
"typedData",
"network"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}