Anthropic credential verification fails on n8n Cloud with enterprise API key

Questions
1

I’m trying to add an Anthropic API credential on n8n Cloud but get the error “The resource you are requesting could not be found.”
n8n: Cloud (latest)
Anthropic: Enterprise subscription
Base URL used: https://api.anthropic.com
The API key works perfectly via direct Python API calls (tested /v1/models and /v1/messages — both return 200)
Custom Header toggle is OFF
The key authenticates successfully outside n8n but fails only during n8n credential verification. Looks like an n8n-side issue with how it verifies Anthropic enterprise credentials.

1 Like
2

Hi @vincentaltor Welcome!
Have you tried this with an HTTP node with the request supported here:

3

Thanks for the help ! let me try this :slight_smile:

1 Like
4

@vincentaltor let me know how HTTP node behaves.

5

Having the same issue with a hosted instance of n8n

6

Does this causes the same issue? @NickdB