Google Ads

You need three things:

• Developer token - from your Google Ads Manager account: Tools → API Center. Apply for one if you don't have it (usually approved same day for "test account" tier).
• Customer ID - the 10-digit number shown in the top-right of the Google Ads UI (remove the dashes).
• OAuth credentials - create a client ID + secret in Google Cloud Console, then follow the ingestr Google Ads guide to get a refresh token.

Shortcut: if this is your first API integration, ask your AI agent: "Walk me through getting a Google Ads refresh token for ingestr, step by step." It knows the whole flow.

Klaviyo

One thing:

• Private API key - in Klaviyo: Account → Settings → API Keys → Create Private API Key. Grant read-only scopes for Lists, Campaigns, Flows, Metrics, Profiles.

Copy the key immediately - Klaviyo only shows it once.

GA4

Three things:

• Property ID - the numeric GA4 property ID (in GA4: Admin → Property Settings → Property ID).
• Service account JSON - create a service account in Google Cloud Console with the "Google Analytics Data API" enabled. Download the key file.
• Grant the service account Viewer access inside GA4 (Admin → Property Access Management → add the service account's email as Viewer).