U.S. government data with provenance: Census demographics, SST sales tax rates, SEC financials.
Free
One server, in research. U.S. government data with provenance: Census demographics, SST sales tax rates, SEC financials.
Research
U.S. government data with provenance: Census demographics, SST sales tax rates, SEC financials.
The rest either hold an API key issued by the publisher or ask for nothing.
Listed without a verification tick. Read the listing before installing.