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POST
/
v1
/
exchange
/
stablefx
/
signatures
Register a trade signature
curl --request POST \
  --url https://api.circle.com/v1/exchange/stablefx/signatures \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "tradeId": "c4d1da72-111e-4d52-bdbf-2e74a2d803d5",
  "address": "0x1234567890abcdef1234567890abcdef12345678",
  "details": {
    "permitted": {
      "token": "0xTOKEN",
      "amount": "1000"
    },
    "spender": "0xa8f94168b4981840ba27d423f4ad6332bedee006",
    "nonce": "309585810",
    "deadline": "1770302983",
    "witness": {
      "consideration": {
        "quoteId": "<string>",
        "base": "<string>",
        "quote": "<string>",
        "baseAmount": "<string>",
        "quoteAmount": "<string>",
        "maturity": "1716153600"
      },
      "fee": "80000"
    }
  },
  "signature": "<string>"
}
'
import requests

url = "https://api.circle.com/v1/exchange/stablefx/signatures"

payload = {
    "tradeId": "c4d1da72-111e-4d52-bdbf-2e74a2d803d5",
    "address": "0x1234567890abcdef1234567890abcdef12345678",
    "details": {
        "permitted": {
            "token": "0xTOKEN",
            "amount": "1000"
        },
        "spender": "0xa8f94168b4981840ba27d423f4ad6332bedee006",
        "nonce": "309585810",
        "deadline": "1770302983",
        "witness": {
            "consideration": {
                "quoteId": "<string>",
                "base": "<string>",
                "quote": "<string>",
                "baseAmount": "<string>",
                "quoteAmount": "<string>",
                "maturity": "1716153600"
            },
            "fee": "80000"
        }
    },
    "signature": "<string>"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

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

print(response.text)
const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    tradeId: 'c4d1da72-111e-4d52-bdbf-2e74a2d803d5',
    address: '0x1234567890abcdef1234567890abcdef12345678',
    details: {
      permitted: {token: '0xTOKEN', amount: '1000'},
      spender: '0xa8f94168b4981840ba27d423f4ad6332bedee006',
      nonce: '309585810',
      deadline: '1770302983',
      witness: {
        consideration: {
          quoteId: '<string>',
          base: '<string>',
          quote: '<string>',
          baseAmount: '<string>',
          quoteAmount: '<string>',
          maturity: '1716153600'
        },
        fee: '80000'
      }
    },
    signature: '<string>'
  })
};

fetch('https://api.circle.com/v1/exchange/stablefx/signatures', 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.circle.com/v1/exchange/stablefx/signatures",
  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([
    'tradeId' => 'c4d1da72-111e-4d52-bdbf-2e74a2d803d5',
    'address' => '0x1234567890abcdef1234567890abcdef12345678',
    'details' => [
        'permitted' => [
                'token' => '0xTOKEN',
                'amount' => '1000'
        ],
        'spender' => '0xa8f94168b4981840ba27d423f4ad6332bedee006',
        'nonce' => '309585810',
        'deadline' => '1770302983',
        'witness' => [
                'consideration' => [
                                'quoteId' => '<string>',
                                'base' => '<string>',
                                'quote' => '<string>',
                                'baseAmount' => '<string>',
                                'quoteAmount' => '<string>',
                                'maturity' => '1716153600'
                ],
                'fee' => '80000'
        ]
    ],
    'signature' => '<string>'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($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.circle.com/v1/exchange/stablefx/signatures"

	payload := strings.NewReader("{\n  \"tradeId\": \"c4d1da72-111e-4d52-bdbf-2e74a2d803d5\",\n  \"address\": \"0x1234567890abcdef1234567890abcdef12345678\",\n  \"details\": {\n    \"permitted\": {\n      \"token\": \"0xTOKEN\",\n      \"amount\": \"1000\"\n    },\n    \"spender\": \"0xa8f94168b4981840ba27d423f4ad6332bedee006\",\n    \"nonce\": \"309585810\",\n    \"deadline\": \"1770302983\",\n    \"witness\": {\n      \"consideration\": {\n        \"quoteId\": \"<string>\",\n        \"base\": \"<string>\",\n        \"quote\": \"<string>\",\n        \"baseAmount\": \"<string>\",\n        \"quoteAmount\": \"<string>\",\n        \"maturity\": \"1716153600\"\n      },\n      \"fee\": \"80000\"\n    }\n  },\n  \"signature\": \"<string>\"\n}")

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

	req.Header.Add("Authorization", "Bearer <token>")
	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.circle.com/v1/exchange/stablefx/signatures")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"tradeId\": \"c4d1da72-111e-4d52-bdbf-2e74a2d803d5\",\n  \"address\": \"0x1234567890abcdef1234567890abcdef12345678\",\n  \"details\": {\n    \"permitted\": {\n      \"token\": \"0xTOKEN\",\n      \"amount\": \"1000\"\n    },\n    \"spender\": \"0xa8f94168b4981840ba27d423f4ad6332bedee006\",\n    \"nonce\": \"309585810\",\n    \"deadline\": \"1770302983\",\n    \"witness\": {\n      \"consideration\": {\n        \"quoteId\": \"<string>\",\n        \"base\": \"<string>\",\n        \"quote\": \"<string>\",\n        \"baseAmount\": \"<string>\",\n        \"quoteAmount\": \"<string>\",\n        \"maturity\": \"1716153600\"\n      },\n      \"fee\": \"80000\"\n    }\n  },\n  \"signature\": \"<string>\"\n}")
  .asString();
require 'uri'
require 'net/http'

url = URI("https://api.circle.com/v1/exchange/stablefx/signatures")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"tradeId\": \"c4d1da72-111e-4d52-bdbf-2e74a2d803d5\",\n  \"address\": \"0x1234567890abcdef1234567890abcdef12345678\",\n  \"details\": {\n    \"permitted\": {\n      \"token\": \"0xTOKEN\",\n      \"amount\": \"1000\"\n    },\n    \"spender\": \"0xa8f94168b4981840ba27d423f4ad6332bedee006\",\n    \"nonce\": \"309585810\",\n    \"deadline\": \"1770302983\",\n    \"witness\": {\n      \"consideration\": {\n        \"quoteId\": \"<string>\",\n        \"base\": \"<string>\",\n        \"quote\": \"<string>\",\n        \"baseAmount\": \"<string>\",\n        \"quoteAmount\": \"<string>\",\n        \"maturity\": \"1716153600\"\n      },\n      \"fee\": \"80000\"\n    }\n  },\n  \"signature\": \"<string>\"\n}"

response = http.request(request)
puts response.read_body
{
  "tradeId": "c4d1da72-111e-4d52-bdbf-2e74a2d803d5",
  "createDate": "2023-01-01T12:04:05Z",
  "updateDate": "2023-01-01T12:04:05Z"
}

Authorizations

​
Authorization
string
header
required

Circle's API Keys are formatted in the following structure "PREFIX:ID:SECRET". All three parts are requred to make a successful request.

Body

application/json

Request body for submitting a maker trade signature

​
tradeId
string<uuid>
required

System-generated unique identifier of the resource.

Example:

"c4d1da72-111e-4d52-bdbf-2e74a2d803d5"

​
address
string
required

The wallet address signing the trade presign data

Example:

"0x1234567890abcdef1234567890abcdef12345678"

​
details
object
required

The maker Permit2 message for signature registration. Contains the signed Permit2 witness transfer data including maker-specific witness details with consideration and fee.

​
signature
string
required

The signature generated from signing the trade presign data

Response

200 - application/json

Trade signature registered successfully

Response from registering a trade signature

​
tradeId
string<uuid>
required

System-generated unique identifier of the resource.

Example:

"c4d1da72-111e-4d52-bdbf-2e74a2d803d5"

​
createDate
string<date-time>
required

Date and time when the resource was created

Example:

"2023-01-01T12:04:05Z"

​
updateDate
string<date-time>
required

Date and time when the resource was last updated

Example:

"2023-01-01T12:04:05Z"