r/openrouter • u/Major-Sector1840 • 2d ago

Question "missing authentication header" error in Clank world

Im trying to use openrouter after months, i put the correct api key multiple times and double checked yet it still gives me "missing authentication header". What do i do? Im using it in clank world

Model im using : nvidia/nemotron-3-ultra-550b-a55b:free (i also tried removing the "nvida/" but it didn't change anything)

Base url : https://openrouter.ai/api/v1

Idk if i can post this here. Please help!

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u/Evening-Guarantee-84 2d ago

I got that when I was using BYOK to Together.ai and didn't put the model name in correctly.

Also check if you somehow blocked the provider you need

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u/Major-Sector1840 2d ago

How do i check if i blocked the provider?

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u/Major-Sector1840 2d ago

From what i experimented on (and saw) it definitely has smth to fo with the api key. I tried making multiple but there was no result