Google Ads API Endpoint Research

I have an AI-driven marketing app in development and need quick, authoritative guidance on the Google Ads API. Specifically, I’m trying to identify which available endpoints let me fetch campaign-level budget information.

Here’s what I want from you during a one-hour engagement:

• A concise rundown of every current Google Ads API endpoint that returns budget data for a campaign, including the exact resource names (e.g., CampaignBudget, Campaign, etc.) and fields I should query.
• Notes on any quirks, limits, or authentication scopes tied to those endpoints so I can avoid common pitfalls when integrating.
• A short recap or reference links—from official Google documentation or proven community sources—so I can dig deeper after our session.

If you already work with the Google Ads API and can hop on a quick call or share a clear write-up right away, you’re exactly who I need.