Re: As a SaaS platform, do we need to link our clients' adwords IDs under our Production Manager account for API access to work?`

Hi Natarajan,

To access a third party's AdWords account data, you need two things: a developer token and valid OAuth2 credentials. You can use a valid developer token (with basic access) to target any production AdWords account, by using the OAuth2 credentials of the targeted account (or the manager account of the targeted account).

To proceed you should do the following:

1. Ask the third party account owner to grant you access to their AdWords account on a new email address using the instructions provided here. This email address should not be associated with any AdWords account.
2.  Once they have granted you access, you should use that email address to create OAuth credentials as described here. 
3. Now that you have the OAuth credentials of the targeted account and your developer token (with basic access), you can use these to make requests against the  targeted client account.

Hope this helps!

Regards,

Vishal, AdWords API Team

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