Thank you for reaching out to the Docusign Community.
The reason why this option is not present whenever you attempt to change your plan is that it is not compatible with your account type. Developer account types will have certain limitations that other web accounts will not be subject to, such as removing the option of creating more than 1 user.
You are welcome to create a second account with the plan needed, under certain circumstances you might be able to re-use your email address.
Feel free to let us know if you need further assistance with this.
Best regards,
Mahmoud | Developer Support Engineer II
Hi Mahmoud
I already have a developers account (without any plan) but I can’t buy any API plans. If I go to developers.docusign.com and login with my account and then proceed to go to “pricing” I see the same screen, no options to choose an API plan.