Webhook URL is not getting registered

[IntegrateSyn]

Hi ,

I am trying to register a webhook URL . I am performing a post operation to twitter to expose my webhook endpoint and i receive the following message -
{“errors”:[{“code”:214,“message”:“Webhook URL does not meet the requirements. Invalid CRC token or json response format.”}]}
The way i am doing this is -

• i have a python client program which is performing the post to https://api.twitter.com/1.1/account_activity/all/development/webhooks.json?url=https://twitterhook1.invent.sparkster.me/twitterhook
• The webhook URL return the json in expected format within 1.5 secs and most of the times under 1 secs.
• CRC token challenge response also is correct as i have verified my sha256 hash with the hash generated by some other token generation programs i saw on twitter documentation page and github
• The response is 200 . I have verfied this via Postman and Insomnia rest clients.
• I am receiving the GET call from twitter with crc_token and i am responding back.

I am not sure why i am receiving this error. Do i need to make the POST call to register endpoint via a web App ? I guess many people have used twurl to perform this so that i guess should not be a problem.
Can anyone shed any light on this please.

[LeBraat]

We have had quite a few people write in about this. Have you read through existing posts yet?
https://twittercommunity.com/search?q=Invalid%20CRC%20token