Here is a coming service: arcsecond.io (which replace the ugly eclipt.is I mentioned in a previous blog post). APIs aren't ready yet, but I intend to give access to basic properties of objects by the end of the month. At least, you can enjoy the front end. :-)
arcsecond.io aims at providing browsable APIs where each piece of astronomical information has its own Uniform Resource Locator (a.k.a. URL). SIMBAD, NED, exoplanet.eu, JPL Horizons, astro telegrams are among the sources of information that arcsecond.io intend to unify. Because we believe in the force of integration.