We use TSOA[1] for that, it can build OpenApi specification from your ts interface. So its could be used for documentation and tsoa can validate but other tools

We use TSOA[1] for that, it can build OpenApi specification from your ts interface. So its could be used for documentation and tsoa can validate but other tools can validate too [1] https://github.com/lukeautry/tsoa https://github.com/lukeautry/tsoa