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"Could not communicate with vendor" error when adding an add-on I am trying to provision an add-on and I am seeing a "could not communicate with vendor" error.
Does Heroku Single Sign-on (SSO) support my identity provider? You are looking to enable Heroku Single Sign-on (Heroku SSO), and want to make sure your identity provider (IdP) is supported.
Not Authorized errors trying to log into an add-ons SSO using Dashboard Getting a "Not Authorized" error when trying to view an add-on for an application via Heroku Dashboard
Which DNS provider am I using? You need to determine which DNS provider you using.
Why aren’t I seeing the add-on plan specified in my app.json in my review or CI app? Your review or CI apps aren't getting the specific add-on plans you've specified in your app.json.
[DEPRECATED] Migrating from Zerigo DNS to PointDNS The Zerigo team has chosen not to continue development of this add-on and has been unable to support customers using the service. We advise you to migrate to a new DNS management service, such as PointDNS, as soon as possible as the service may stop working at any time. If you are unsure if you need to migrate, first see our article on [determining which DNS provider you are using](/which-dns-provider-am-i-using). If you are not currently using Zerigo, you can remove the Zerigo add-on immediately.
How to upgrade or downgrade add-ons? I don't know how to upgrade or downgrade a third party add-on.
Add, Update, or Change Credit Card You need to add a new credit card or update existing payment information on an account.
Why are `heroku pg` commands failing with "Couldn't find that add on"? When running a `heroku pg` command (e.g. `heroku pg:copy`), the command fails with the error message: Couldn't find that add on
Why did I lose access to a Heroku Connect add-on? You were able to access a Heroku Connect add-on using the Heroku Connect dashboard, but you can no longer access it and you don't know why.

Dev Center articles 3

Supporting Private Spaces as an Add-on Partner Heroku Private Spaces allow you to run dynos within an isolated environment. Add-on partners can easily allow their add-ons to be used in private spaces apps with a few changes to provisioning flow.
Asynchronous Deprovisioning of Add-ons (Public Beta) A Partner's guide to getting up and running with Asynchronous Deprovisioning.
Writing Best Practices For Application Logs This article focuses on best practices for writing logs that your application code generates.

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