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POST
/
v1
/
order
/
{orderId}
/
cancel
Cancel Order
curl --request POST \
  --url https://api.polymarket.us/v1/order/{orderId}/cancel \
  --header 'Content-Type: application/json' \
  --header 'X-PM-Access-Key: <api-key>' \
  --header 'X-PM-Signature: <api-key>' \
  --header 'X-PM-Timestamp: <api-key>' \
  --data '
{
  "marketSlug": "<string>"
}
'
{}

Documentation Index

Fetch the complete documentation index at: https://docs.polymarket.us/llms.txt

Use this file to discover all available pages before exploring further.

Authorizations

​
X-PM-Access-Key
string
header
required

Your API key ID (UUID). Generate at polymarket.us/developer.

​
X-PM-Timestamp
string
header
required

Unix timestamp in milliseconds. Must be within 30 seconds of server time.

​
X-PM-Signature
string
header
required

Base64-encoded Ed25519 signature of timestamp + method + path. See Authentication for details.

Path Parameters

​
orderId
string
required

Exchange-assigned Order ID to cancel

Body

application/json

Request to cancel an existing order

Request to cancel an existing order

​
marketSlug
string

Unique market slug into which the order should be canceled

Response

Order canceled successfully

Response for order cancellation (empty on success)