Make X API calls for Free from Grok Build's hidden tools

This is a small pipeline for reading and searching public X without an X Developer API key.

Instead of pay-per-use access to Posts and User content on X we're using Grok Build which has 1st party integration with X API with kind of secret tools calls. API costs $0.005 per for Posts Read and $0.010 per User Read. Here you can just use your X subscription.