WhoCaller
A minimal frontend for Truecaller to search whether a number is spam or not. This emulates requests what the official app would make. Unofficial API is also provided.
Public Instance: whocaller.fly.dev
CLI
I also made a standalone command line tool (available in cli folder) for personal usage. It also shows name, email, region unlike the webapp which (deliberately, for privacy reasons) shows only spam details. The CLI requires curl and jq. It expects a environment variable CALLER_TOKEN.
Installation
To run, you'll need to set CALLER_TOKEN environment variable which you can get from inspecting the app traffic after logging in the official app. It is the bearer token found in Authentication header.