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n8n errors / Auth

Request failed with status code 401

platform: n8n / category: Auth / code: 401

Cause

The target API rejected the request because valid authentication credentials were absent or invalid in the headers.

Fix

Verify the API key/token is correct and not revoked. Ensure the header name matches the API spec (Authorization: Bearer vs x-api-key). For OAuth2, refresh the token and re-save the credential. On self-hosted n8n, confirm DB env vars are set so the internal auth layer initialises.

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