This is JASPAR browsable API, which provides easy-to-use REST web interface to query/retrieve matrix profile data from JASPAR database. The API comes with a human browsable interface and also programmatic interface, which return the results in eight different formats, including json, jsonp, jaspar, transfac, pfm, meme and yaml, bed and also api for browsable interface.
GET /api/auth/login/?next=/api/v1/docs/