2018-06-26

API

TLDR: Use api.clubelo.com/YYYY-MM-DD to get one day's full ranking or api.clubelo.com/CLUBNAME to get one club's full Elo history.

One day's ranking

api.clubelo.com/YYYY-MM-DD

This provides the full ranking for each day since 1939. Values before 1960 should be considered provisional.

One club's rating history

api.clubelo.com/CLUBNAME

This provides the ranking history for a club. For the exact spelling of a club's name, check the ranking. Values before 1960 should be considered provisional.

Upcoming games

api.clubelo.com/Fixtures

This provides the calculated probabilities for all upcoming matches. Probabilities are given for all goal differences between -5 and +5 as well as the aggregated probability for all goal differences smaller than -5 or bigger than +5. Probabilities are also given for each exact result with 6 or less total goals.
If you want the traditional match odds (1X2), simply sum up all negative goal differences for an away win and all positive goal differences for a home win (draw being goal difference = 0).