Describe the problem/error/question I am trying to Run the Forcepoint API to get the list of Categories and the sites within it. Forcepoint_API: https://ws-custom-categories.api.forcepoint.io/v1.0.0 I need to generate the Bearer token using this: Forcepoint API Documentation which I did and when I…

[image] Shashank_Bindulbavi: Share the output returned by the last node { “errorMessage”: “Forbidden - perhaps check your credentials?”, “errorDescription”: “Forbidden”, “errorDetails”: { “rawErrorMessage”: [ “403 - “{"message":"Forbidden"}\n”” ], “httpCode”: “403” }, “n8nDetails”: { “…

Hi @A_A4 , I have done both, Removed <> and the / in the URL. This is just one of many things that I tried and still the same 403! Looks like Forcepoint API doesn’t like the n8n’s IP?

@Shashank_Bindulbavi If Forcepoint does have any “trusted source” / IP / network controls on that API, whitelisting n8n Cloud’s IP ranges is the most likely fix. some APIs issue tokens bound to client / redirect / audience that can differ between environments and return 403 even when the token stri…

Upon looking carefully, I noticed you’re using different tokens on Postman vs on n8n. Postman one starts with ‘12’ while the n8n one starts with ‘fp_oidc’ try the exact some token remove the angular brackets (<>) remove the forward slash (/) Let us know how it goes.

Hi @jitesh - That’s probably because its the middle/end part of the token! All 3 have been validated and its still the 403 error! Hi @A_A4 , Thanks will have a read through and see if I have any luck with it today!

N8N API Forbidden error while it works in Postman

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Shashank_Bindulbavi March 9, 2026, 5:47am 7

Looks like this is related to Forcepoint Whitelisting the IPs when I checked with them!

Reference: [n8n Cloud] How to Whitelist n8n Cloud IPs for Accessing In-House APIs

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N8N API Forbidden error while it works in Postman

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