I can't authorize but can get server address

P.S.: there is my request and result https://yadi.sk/i/8eVeQu40kGwav

Hi Aleksey,
If you're using Clarizen Professional edition, the API in unavailable for you. Please contact your customer success manager or sales representative for an upgrade.
I couldn't see your request and result, but please read this post which seems very similar to what you describe:
https://success.clarizen.com/hc/communities/public/questions/205471888-API-2-0-is-not-authorization-for-Login-service
Hope this helps,
Ophir

So, why, I'm recieve a message - "Username and password do not match." instead "API access is not supported in your current edition"
I've double check my credentials.

The "GetServerDefinition" may be successful even with a wrong user name/password, especially if sent to api.clarizen.com (api2.clarizen.com is better for this).
Seeing your request and result it's probably because you've sent the user name/ password in the headers.
They should be in the request body. Please refer to the API documentation on:
https://success.clarizen.com/hc/communities/public/questions/203993788-Clarizen-REST-API-Version-2-0
Hope this helps,
Ophir

P.S. in my settinggs specified
Package Type: Enterprise
I guess it's free trial version.

I've put username and password to body, but but still recieve 401 answer
https://yadi.sk/i/lRbOJRcrkLSA9

Hi Aleksey,
Please do the same for GetServerDefinition. You'll get the correct URL to login with.
Hope this helps,
Ophir

Great thanks to clarify