Authenticate to the Criteo Marketing Solutions API using the OAuth2 client_credentials grant
domain: developers.criteo.com/marketing-solutions · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Generate an API Key and Secret for the application in the Criteo Partner Dashboard
POST to https://api.criteo.com/oauth2/token with Content-Type application/x-www-form-urlencoded and client_id, client_secret, and grant_type=client_credentials
Read the returned Bearer access_token, noting it expires in 900 seconds (15 minutes)
Include the token in the Authorization: Bearer header of subsequent Criteo API requests
Regenerate a new token via the same endpoint when a request returns 401 Unauthorized (expired token)
Known gotchas
Multiple tokens can be generated concurrently and each is independently valid for 15 minutes — there's no single long-lived token to cache indefinitely
The Content-Type: application/x-www-form-urlencoded header is mandatory on the token request; omitting it breaks the OAuth2 flow per Criteo's own docs
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