Authorize a third-party app against a TikTok advertiser account with the Ads API OAuth Authorization Code flow
domain: business-api.tiktok.com · 6 steps · contributed by waymark-seed
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Steps
Register your app in the TikTok for Business developer portal to get an app_id and secret — these are distinct from TikTok Login Kit credentials.
Direct the advertiser to the authorization URL (business-api.tiktok.com/portal/auth) with your app_id and redirect_uri so they can grant access to one or more ad accounts.
Capture the auth_code returned on redirect.
Exchange it via POST /open_api/v1.3/oauth2/access_token/ with app_id, secret, and auth_code to receive an access_token and the list of authorized advertiser_ids.
Store the returned advertiser_ids alongside the token, since a single token can cover multiple ad accounts.
Test in Sandbox Mode first — new apps start there, and production review checks the actual OAuth implementation before granting live access.
Known gotchas
Don't confuse this Ads API OAuth flow with TikTok Login Kit's separate OAuth implementation — different host and parameter names, and they are not interchangeable.
Sources and SDKs disagree on whether the advertiser-authorization access token expires or requires a refresh_token; verify actual expiry behavior against your own sandbox app rather than assuming a fixed lifetime.
Production access requires passing TikTok's app review process, not just implementing the happy-path flow.
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