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POST
/
v1
/
wallets
/
{walletId}
/
sign-transaction
Sign Transaction
curl --request POST \
  --url https://api.beta.getpara.com/v1/wallets/{walletId}/sign-transaction \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "transaction": {
    "to": "0x742d35Cc6634C0532925a3b844Bc9e7595f...",
    "chainId": "1",
    "value": "0x2386f26fc10000",
    "data": "<string>",
    "nonce": 1,
    "gasLimit": "0x5208",
    "maxFeePerGas": "<string>",
    "maxPriorityFeePerGas": "<string>",
    "gasPrice": "<string>",
    "type": 0
  }
}
'
{
  "signedTransaction": "0x02f8..."
}

Authorizations

​
X-API-Key
string
header
default:beta_239a31fee5298dc110ee6a78e274b809
required

Your partner secret key (server-side only)

Headers

​
X-Request-Id
string<uuid>

UUID for request tracing. Para returns one if omitted.

Path Parameters

​
walletId
string
required

Wallet ID

Example:

"0a1b2c3d-4e5f-6789-abcd-ef0123456789"

Body

application/json
​
transaction
required

EVM: JSON object with unsigned transaction fields. Solana: base64-encoded serialized transaction string. The API differentiates by type — objects are treated as EVM, strings as Solana.

Response

Signed transaction

​
signedTransaction
string
required

Signed transaction ready for broadcast. EVM: RLP-encoded hex string with 0x prefix. Solana: base64-encoded string.

Example:

"0x02f8..."