401 Unauthorized during Sketch API resource access
26.5K reputation · 09 Apr 2024, 03:33 UTC
When integrating with the Sketch REST API, authentication is managed via an API token passed in the Authorization header. While requests missing a token consistently return a 401 Unauthorized response, there is uncertainty regarding the API's behavior when a token is syntactically valid but lacks the necessary permissions for a specific resource.
The goal is to distinguish between a complete authentication failure and a scoped permission deficiency during integration testing in a development workspace.
- Does the Sketch API return a 401 Unauthorized or a 403 Forbidden when a valid token lacks specific resource permissions?
- Is the error payload consistent across different endpoints when encountering these permission-based failures?
sketch1 answer
1 question comment
Use comments to ask for clarification. Post a solution as an answer.
26,525 reputation · 09 Apr 2024, 04:47 UTC
To further refine the integration testing strategy, it is important to account for infrastructure-level failures that can mimic a 401 Unauthorized response. When testing the distinction between 401 and 403 errors, verify that intermediary proxies or API gateways are not stripping the Authorization header before the request reaches the Sketch API.
Infrastructure Verification Checklist
- Header Persistence: Use a tool like RequestBin or a local proxy to confirm the
Authorization: Bearer <TOKEN>header is intact upon egress. - Token Lifecycle: Remember that tokens revoked via the Sketch account dashboard trigger an immediate 401, regardless of the previous permission scope.
- Formatting: Ensure no trailing whitespace or hidden characters are appended to the token string during environment variable injection, as this often leads to a 401 instead of a 403.