I want to extract data from a PDF, but the HTTP Request node throws an error.
I want to extract data from a PDF using AI because my PDF doesn’t contain a text layer.
At first, I worked with Mistral, but it only captured about one third of the data.
Now I’d like to try Google Cloud Vision instead, and for that I used an example workflow.
The example workflow works with images, but I need to adapt it for PDFs.
When I try with an HTTP Request node, I always get the error that a JSON parameter is missing.
I don’t know what exactly I need to change in the request so that it works.
Could someone please help me?
Error message: JSON parameter needs to be valid JSON
Please share your workflow
Information on your n8n setup
- n8n version: 1.108.2
- Database (default: SQLite):
- n8n EXECUTIONS_PROCESS setting (default: own, main):
- Running n8n via (Win10 VM):
- Operating system: WIn10




