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POST
/
clients
/
me
/
chains
/
{chain}
/
wallet
/
build-authorization-list
Build an EIP-7702 authorization
curl --request POST \
  --url https://api.portalhq.io/api/v3/clients/me/chains/{chain}/wallet/build-authorization-list \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "subsidize": true,
  "contractAddress": "<string>",
  "nonce": 123
}
'
{
  "data": {
    "hash": "<string>"
  },
  "metadata": {
    "authorization": {
      "contractAddress": "<string>",
      "chainId": "<string>",
      "nonce": "<string>"
    },
    "chainId": "<string>"
  }
}

Authorizations

​
Authorization
string
header
required

Client API Key or Client Session Token (CST). Pass as a Bearer token in the Authorization header.

Path Parameters

​
chain
string
required

The blockchain chain identifier. Use either a friendly name or CAIP-2 format. When using CAIP-2 format in URLs, ensure the colon (:) is URI-encoded as %3A.

Supported chains:

  • ethereum (eip155:1)
  • sepolia (eip155:11155111)
  • base (eip155:8453)
  • base-sepolia (eip155:84532)
  • polygon (eip155:137)
  • polygon-mumbai (eip155:80001)
  • celo (eip155:42220)
  • celo-alfajores (eip155:44787)
  • monad-testnet (eip155:10143)
  • solana (solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp)
  • solana-devnet (solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1)
  • tron (tron:mainnet)
  • tron-nile (tron:nile)
  • tron-shasta (tron:shasta)
  • stellar (stellar:pubnet)
  • stellar-testnet (stellar:testnet)
  • bitcoin-segwit (bip122:000000000019d6689c085ae165831e93-p2wpkh)
  • bitcoin-segwit-testnet (bip122:000000000933ea01ad0ee984209779ba-p2wpkh)
  • bitcoin-p2wpkh (bip122:000000000019d6689c085ae165831e93-p2wpkh)
  • bitcoin-p2wpkh-testnet (bip122:000000000933ea01ad0ee984209779ba-p2wpkh)

Body

application/json
​
subsidize
boolean
required

Whether Portal should subsidize gas for this authorization.

​
contractAddress
string

Target smart contract address for delegation.

​
nonce

Optional nonce.

Response

Authorization built successfully

​
data
object
​
metadata
object