Cancel multiple orders by marking them invalid with a timestamp.
This is a best effort cancellation, and might not prevent solvers from settling the orders (if the order is part of an in-flight settlement transaction for example). Authentication must be provided by an EIP-712 signature of an OrderCancellations(bytes[] orderUids) message.
DELETE
/
api
/
v1
/
orders
Cancel multiple orders by marking them invalid with a timestamp.
curl --request DELETE \
--url https://api.cow.fi/mainnet/api/v1/orders \
--header 'Content-Type: application/json' \
--data '
{
"signature": "0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
"orderUids": [
"0xff2e2e54d178997f173266817c1e9ed6fee1a1aae4b43971c53b543cffcc2969845c6f5599fbb25dbdd1b9b013daf85c03f3c63763e4bc4a"
]
}
'import requests
url = "https://api.cow.fi/mainnet/api/v1/orders"
payload = {
"signature": "0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
"orderUids": ["0xff2e2e54d178997f173266817c1e9ed6fee1a1aae4b43971c53b543cffcc2969845c6f5599fbb25dbdd1b9b013daf85c03f3c63763e4bc4a"]
}
headers = {"Content-Type": "application/json"}
response = requests.delete(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'DELETE',
headers: {'Content-Type': 'application/json'},
body: JSON.stringify({
signature: '0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
orderUids: [
'0xff2e2e54d178997f173266817c1e9ed6fee1a1aae4b43971c53b543cffcc2969845c6f5599fbb25dbdd1b9b013daf85c03f3c63763e4bc4a'
]
})
};
fetch('https://api.cow.fi/mainnet/api/v1/orders', 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.cow.fi/mainnet/api/v1/orders",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "DELETE",
CURLOPT_POSTFIELDS => json_encode([
'signature' => '0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
'orderUids' => [
'0xff2e2e54d178997f173266817c1e9ed6fee1a1aae4b43971c53b543cffcc2969845c6f5599fbb25dbdd1b9b013daf85c03f3c63763e4bc4a'
]
]),
CURLOPT_HTTPHEADER => [
"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.cow.fi/mainnet/api/v1/orders"
payload := strings.NewReader("{\n \"signature\": \"0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000\",\n \"orderUids\": [\n \"0xff2e2e54d178997f173266817c1e9ed6fee1a1aae4b43971c53b543cffcc2969845c6f5599fbb25dbdd1b9b013daf85c03f3c63763e4bc4a\"\n ]\n}")
req, _ := http.NewRequest("DELETE", url, payload)
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.delete("https://api.cow.fi/mainnet/api/v1/orders")
.header("Content-Type", "application/json")
.body("{\n \"signature\": \"0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000\",\n \"orderUids\": [\n \"0xff2e2e54d178997f173266817c1e9ed6fee1a1aae4b43971c53b543cffcc2969845c6f5599fbb25dbdd1b9b013daf85c03f3c63763e4bc4a\"\n ]\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.cow.fi/mainnet/api/v1/orders")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Delete.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n \"signature\": \"0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000\",\n \"orderUids\": [\n \"0xff2e2e54d178997f173266817c1e9ed6fee1a1aae4b43971c53b543cffcc2969845c6f5599fbb25dbdd1b9b013daf85c03f3c63763e4bc4a\"\n ]\n}"
response = http.request(request)
puts response.read_body{
"description": "<string>"
}Body
application/json
Signed OrderCancellations.
EIP-712 signature of struct OrderCancellations { orderUid: bytes[] } from the order's owner.
OrderCancellation signed by the owner.
Example:
"0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
How was the order signed?
Available options:
eip712, ethsign Up to 128 UIDs of orders to cancel.
Unique identifier for the order: 56 bytes encoded as hex with 0x
prefix.
Bytes 0..32 are the order digest, bytes 30..52 the owner address and
bytes 52..56 the expiry (validTo) as a uint32 unix epoch timestamp.
Response
Order(s) are cancelled.
Last modified on March 17, 2026
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⌘I
Cancel multiple orders by marking them invalid with a timestamp.
curl --request DELETE \
--url https://api.cow.fi/mainnet/api/v1/orders \
--header 'Content-Type: application/json' \
--data '
{
"signature": "0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
"orderUids": [
"0xff2e2e54d178997f173266817c1e9ed6fee1a1aae4b43971c53b543cffcc2969845c6f5599fbb25dbdd1b9b013daf85c03f3c63763e4bc4a"
]
}
'import requests
url = "https://api.cow.fi/mainnet/api/v1/orders"
payload = {
"signature": "0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
"orderUids": ["0xff2e2e54d178997f173266817c1e9ed6fee1a1aae4b43971c53b543cffcc2969845c6f5599fbb25dbdd1b9b013daf85c03f3c63763e4bc4a"]
}
headers = {"Content-Type": "application/json"}
response = requests.delete(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'DELETE',
headers: {'Content-Type': 'application/json'},
body: JSON.stringify({
signature: '0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
orderUids: [
'0xff2e2e54d178997f173266817c1e9ed6fee1a1aae4b43971c53b543cffcc2969845c6f5599fbb25dbdd1b9b013daf85c03f3c63763e4bc4a'
]
})
};
fetch('https://api.cow.fi/mainnet/api/v1/orders', 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.cow.fi/mainnet/api/v1/orders",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "DELETE",
CURLOPT_POSTFIELDS => json_encode([
'signature' => '0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000',
'orderUids' => [
'0xff2e2e54d178997f173266817c1e9ed6fee1a1aae4b43971c53b543cffcc2969845c6f5599fbb25dbdd1b9b013daf85c03f3c63763e4bc4a'
]
]),
CURLOPT_HTTPHEADER => [
"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.cow.fi/mainnet/api/v1/orders"
payload := strings.NewReader("{\n \"signature\": \"0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000\",\n \"orderUids\": [\n \"0xff2e2e54d178997f173266817c1e9ed6fee1a1aae4b43971c53b543cffcc2969845c6f5599fbb25dbdd1b9b013daf85c03f3c63763e4bc4a\"\n ]\n}")
req, _ := http.NewRequest("DELETE", url, payload)
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.delete("https://api.cow.fi/mainnet/api/v1/orders")
.header("Content-Type", "application/json")
.body("{\n \"signature\": \"0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000\",\n \"orderUids\": [\n \"0xff2e2e54d178997f173266817c1e9ed6fee1a1aae4b43971c53b543cffcc2969845c6f5599fbb25dbdd1b9b013daf85c03f3c63763e4bc4a\"\n ]\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.cow.fi/mainnet/api/v1/orders")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Delete.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n \"signature\": \"0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000\",\n \"orderUids\": [\n \"0xff2e2e54d178997f173266817c1e9ed6fee1a1aae4b43971c53b543cffcc2969845c6f5599fbb25dbdd1b9b013daf85c03f3c63763e4bc4a\"\n ]\n}"
response = http.request(request)
puts response.read_body{
"description": "<string>"
}