Authentication problem with Fal.ai

[Gezer]

I have a problem with Fal.ai, when I try to use fal-ai/ffmpeg-api/compose I got:
{“detail”: “Cannot access application ‘fal-ai/ffmpeg-api’. Authentication is required to access this application.”}

I did the request like the instructions in their website but it does not work, how can I fix it?

[mohamed3nan]

Hi @Gezer welcome to community!

Could you please check this post for guidance on successfully adding the fal.ai API to n8n:

Fal.ai api key not working

Hello @smoshwed Welcome to n8n community It looks like you need to add the fal.ai API key as an Authorization header, like this: Authorization: Key $FAL_KEY so in the HTTP node: [image] then try something like this: [image] Let me know if it still doesn’t work — it’s working on my end! If this answers your question, please mark the reply as the solution

and let me know if you still run into any issues..

[Gezer]

I did it like that:

and the POST URL to: https://queue.fal.run/fal-ai/ffmpeg-api/compose

[mohamed3nan]

Yes, this should work I think:

[Gezer]

But it does not, how can I solve it?

[mohamed3nan]

Check your FAL account, the APIs, and if possible share the workflow with screenshots of the exact error to help debug the issue..

[Gezer]

I have checked the FAL and the APIs, and the flow is like this video:

This AI System Creates BigFoot YouTube Vlogs Hourly (n8n Guide)

from 29:40

[Gezer]

Does someone find a solution?

[Artem_Alekseev]

I’ve had the same problem, when I check fal.ai requests I saw that body of the request wasn’t right. You need to ensure that u use “expression” not the raw json.

It’s how it should be

this is wrong body, if u dont use expression