curl --request POST \
--url https://api.beta.getpara.com/v1/wallets/{walletId}/sign-message \
--header 'Content-Type: application/json' \
--header 'X-API-Key: <api-key>' \
--data '
{
"message": "Hello World"
}
'import requests
url = "https://api.beta.getpara.com/v1/wallets/{walletId}/sign-message"
payload = { "message": "Hello World" }
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({message: 'Hello World'})
};
fetch('https://api.beta.getpara.com/v1/wallets/{walletId}/sign-message', 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-message",
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([
'message' => 'Hello World'
]),
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-message"
payload := strings.NewReader("{\n \"message\": \"Hello World\"\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-message")
.header("X-API-Key", "<api-key>")
.header("Content-Type", "application/json")
.body("{\n \"message\": \"Hello World\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.beta.getpara.com/v1/wallets/{walletId}/sign-message")
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 \"message\": \"Hello World\"\n}"
response = http.request(request)
puts response.read_bodySign Message
Sign a human-readable message with a wallet’s private key share via MPC.
For EVM wallets, the EIP-191 prefix (\x19Ethereum Signed Message:\n<length>)
is prepended and the result is keccak256-hashed before MPC signing. For Solana,
Cosmos, and Stellar wallets, the raw UTF-8 bytes of the message are signed directly.
For Sui wallets, the message is wrapped in the Sui PersonalMessage intent and
blake2b-256 hashed before MPC signing.
The response signature is hex-encoded without a 0x prefix, except for Sui
wallets, which return the serialized Sui signature
(base64(flag || signature || publicKey)).
curl --request POST \
--url https://api.beta.getpara.com/v1/wallets/{walletId}/sign-message \
--header 'Content-Type: application/json' \
--header 'X-API-Key: <api-key>' \
--data '
{
"message": "Hello World"
}
'import requests
url = "https://api.beta.getpara.com/v1/wallets/{walletId}/sign-message"
payload = { "message": "Hello World" }
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({message: 'Hello World'})
};
fetch('https://api.beta.getpara.com/v1/wallets/{walletId}/sign-message', 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-message",
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([
'message' => 'Hello World'
]),
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-message"
payload := strings.NewReader("{\n \"message\": \"Hello World\"\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-message")
.header("X-API-Key", "<api-key>")
.header("Content-Type", "application/json")
.body("{\n \"message\": \"Hello World\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.beta.getpara.com/v1/wallets/{walletId}/sign-message")
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 \"message\": \"Hello World\"\n}"
response = http.request(request)
puts response.read_bodyAuthorizations
Your partner secret key (server-side only)
Headers
UUID for request tracing. Para returns one if omitted.
For sponsored transfers, use the durable behavior documented on POST /transfer.
Other POST endpoints use this key for safe retries. 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.
Replays return the original response, not the latest chain outcome. For a persisted broadcast,
use the returned transactionId with GET transaction history to track its current status.
256Path Parameters
Wallet UUID. A malformed or inaccessible wallet ID returns 404.
"0a1b2c3d-4e5f-6789-abcd-ef0123456789"
Body
Non-empty human-readable message to sign
1"Hello World"
Response
Signature
Hex-encoded signature without 0x prefix. Sui wallets return a base64-encoded serialized Sui signature instead.
"a1b2c3d4e5f6..."