Introduction

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Blocks lookup

The blocks lookup GET endpoint allows you to see which accounts you’ve blocked on behalf of an authorized user. This endpoint has a rate limit of 15 requests per 15 minutes per user. 

Since you are making requests for private information with blocks lookup, and on behalf of a user with manage blocks, you must authenticate these endpoints with either OAuth 1.0a User Context or OAuth 2.0 Authorization Code with PKCE, and use the user Access Tokens associated with a user that has authorized your App, which can be generated using the 3-legged OAuth flow (OAuth 1.0a) or the Authorization Code with PKCE grant flow) (OAuth 2.0).