libcurl wrapper - https://github.com/sepisoad/jurl https://github.com/sepisoad/jurl json encoder/decoder - https://github.com/janet-lang/json https://github.co

libcurl wrapper - https://github.com/sepisoad/jurl https://github.com/sepisoad/jurl json encoder/decoder - https://github.com/janet-lang/json https://github.com/janet-lang/json Not aware of any HTML parsers/traverses (if that's what you mean with "Crawler") but interfacing with C libraries is easy so grab any C library you'd like for that task.