Help / FAQ / About / Is there an API?

Not yet. It's in the bucket of to-do's but it could be a while because your.flowingdata is a research project and my main focus is on visualization and interaction with data.

While there's no API to retrieve your data programmatically, you can still download your data from your Actions Log as a tab-delimited text file. You can also send data programmatically via the Twitter API.