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POST
/
v1
/
wallets
/
{walletId}
/
sign-authorization
Sign Authorization (EIP-7702)
curl --request POST \
  --url https://api.beta.getpara.com/v1/wallets/{walletId}/sign-authorization \
  --header 'Content-Type: application/json' \
  --header 'X-API-Key: <api-key>' \
  --data '
{
  "authorization": {
    "chainId": 1,
    "nonce": 0,
    "address": "0x1234567890abcdef1234567890abcdef12345678",
    "contractAddress": "0x1234567890abcdef1234567890abcdef12345678"
  }
}
'
import requests

url = "https://api.beta.getpara.com/v1/wallets/{walletId}/sign-authorization"

payload = { "authorization": {
"chainId": 1,
"nonce": 0,
"address": "0x1234567890abcdef1234567890abcdef12345678",
"contractAddress": "0x1234567890abcdef1234567890abcdef12345678"
} }
headers = {
"X-API-Key": "<api-key>",
"Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)
const options = {
method: 'POST',
headers: {'X-API-Key': '<api-key>', 'Content-Type': 'application/json'},
body: JSON.stringify({
authorization: {
chainId: 1,
nonce: 0,
address: '0x1234567890abcdef1234567890abcdef12345678',
contractAddress: '0x1234567890abcdef1234567890abcdef12345678'
}
})
};

fetch('https://api.beta.getpara.com/v1/wallets/{walletId}/sign-authorization', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));
<?php

$curl = curl_init();

curl_setopt_array($curl, [
CURLOPT_URL => "https://api.beta.getpara.com/v1/wallets/{walletId}/sign-authorization",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode([
'authorization' => [
'chainId' => 1,
'nonce' => 0,
'address' => '0x1234567890abcdef1234567890abcdef12345678',
'contractAddress' => '0x1234567890abcdef1234567890abcdef12345678'
]
]),
CURLOPT_HTTPHEADER => [
"Content-Type: application/json",
"X-API-Key: <api-key>"
],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}
package main

import (
"fmt"
"strings"
"net/http"
"io"
)

func main() {

url := "https://api.beta.getpara.com/v1/wallets/{walletId}/sign-authorization"

payload := strings.NewReader("{\n \"authorization\": {\n \"chainId\": 1,\n \"nonce\": 0,\n \"address\": \"0x1234567890abcdef1234567890abcdef12345678\",\n \"contractAddress\": \"0x1234567890abcdef1234567890abcdef12345678\"\n }\n}")

req, _ := http.NewRequest("POST", url, payload)

req.Header.Add("X-API-Key", "<api-key>")
req.Header.Add("Content-Type", "application/json")

res, _ := http.DefaultClient.Do(req)

defer res.Body.Close()
body, _ := io.ReadAll(res.Body)

fmt.Println(string(body))

}
HttpResponse<String> response = Unirest.post("https://api.beta.getpara.com/v1/wallets/{walletId}/sign-authorization")
.header("X-API-Key", "<api-key>")
.header("Content-Type", "application/json")
.body("{\n \"authorization\": {\n \"chainId\": 1,\n \"nonce\": 0,\n \"address\": \"0x1234567890abcdef1234567890abcdef12345678\",\n \"contractAddress\": \"0x1234567890abcdef1234567890abcdef12345678\"\n }\n}")
.asString();
require 'uri'
require 'net/http'

url = URI("https://api.beta.getpara.com/v1/wallets/{walletId}/sign-authorization")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["X-API-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"authorization\": {\n \"chainId\": 1,\n \"nonce\": 0,\n \"address\": \"0x1234567890abcdef1234567890abcdef12345678\",\n \"contractAddress\": \"0x1234567890abcdef1234567890abcdef12345678\"\n }\n}"

response = http.request(request)
puts response.read_body
{
  "address": "0x1234567890abcdef1234567890abcdef12345678",
  "chainId": 1,
  "nonce": 0,
  "r": "0xa1b2c3...",
  "s": "0xd4e5f6...",
  "yParity": 0,
  "signature": "a1b2c3d4e5f6..."
}
{
"code": "INVALID_REQUEST",
"message": "type must be one of EVM, SOLANA, COSMOS, STELLAR"
}
{
"code": "UNAUTHORIZED",
"message": "secret api key not provided"
}
{
"code": "FORBIDDEN",
"message": "invalid secret api key"
}
{
"code": "NOT_FOUND",
"message": "wallet not found"
}
{
"code": "CONFLICT",
"message": "A request with this idempotency key is currently being processed"
}
{
"code": "UNPROCESSABLE",
"message": "Idempotency key has already been used with different request parameters"
}
{
"code": "RATE_LIMITED",
"message": "Rate limit exceeded, try again shortly."
}
{
"code": "INTERNAL_ERROR",
"message": "Internal Server Error"
}

Authorizations

X-API-Key
string
header
default:sk_your_secret_key_here
required

Your partner secret key (server-side only)

Headers

X-Request-Id
string<uuid>

UUID for request tracing. Para returns one if omitted.

Idempotency-Key
string

Unique key for safe retries on POST endpoints. If a request with the same key is received within 24 hours, the original response is returned without re-executing. Recommended format: UUID v4. Max length 256 characters. Returns 422 if the same key is reused with a different request body. Returns 409 if a request with the same key is still being processed.

Maximum string length: 256

Path Parameters

walletId
string
required

Wallet ID

Example:

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

Body

application/json
authorization
object
required

Response

Signed authorization

address
string
required

Contract address the authorization delegates to.

Example:

"0x1234567890abcdef1234567890abcdef12345678"

chainId
integer
required

Chain ID from the authorization.

Example:

1

nonce
integer
required

Nonce from the authorization.

Example:

0

r
string
required

ECDSA signature r component (hex with 0x prefix).

Example:

"0xa1b2c3..."

s
string
required

ECDSA signature s component (hex with 0x prefix).

Example:

"0xd4e5f6..."

yParity
enum<integer>
required

EIP-7702 parity bit (0 or 1). Unlike other signing endpoints that return v (27/28), this uses yParity per the EIP-7702 spec.

Available options:
0,
1
Example:

0

signature
string
required

Raw hex-encoded 65-byte signature without 0x prefix (r + s + v).

Example:

"a1b2c3d4e5f6..."