# Test a callback URL **POST /v1/publishers/callbacks/test** This endpoint is used to test a callback URL. It sends a test payload to the callback URL. ## Servers - https://api.bitlabs.ai: https://api.bitlabs.ai () ## Authentication methods - Header s2s token ## Parameters ### Body: application/json (object) - **url** (string) - **data** (object) - **tags** (object) - **custom_fields** (object) ## Responses ### 200 OK #### Body: application/json (object) - **data** (object) ### 406 VPN detected #### Body: application/json (object) - **data** (object) [Powered by Bump.sh](https://bump.sh)