I’m automating analysis of domains and IP addresses in logs using surbl and google/safebrowsing. What other similar services have open APIs?

Posted on Twitter over 17 years ago and archived here at /twitter/2009/05/06/tweet-1730554339/ in the Twitter and Facebook collections.
Proximate posts in the Twitter collection
newer Twitter post from May 7, 2009, 1732239712 07 May 2009
this post Twitter post from May 7, 2009, 1730554339 07 May 2009
older Twitter post from May 7, 2009, 1729885825 07 May 2009
Proximate posts in the General collection
newer Twitter post from May 7, 2009, 1732239712 07 May 2009
this post Twitter post from May 7, 2009, 1730554339 07 May 2009
older Twitter post from May 7, 2009, 1729885825 07 May 2009