Interestingly, TreasuryDirect's terms of service are codified in the Code of Federal Regulations: https://www.law.cornell.edu/cfr/text/31/part-363/subpart-B ht

Interestingly, TreasuryDirect's terms of service are codified in the Code of Federal Regulations: https://www.law.cornell.edu/cfr/text/31/part-363/subpart-B https://www.law.cornell.edu/cfr/text/31/part-363/subpart-B From a brief reading, having a third party access your TreasuryDirect account does seem problematic: https://www.law.cornell.edu/cfr/text/31/363.22 https://www.law.cornell.edu/cfr/text/31/363.22 https://www.law.cornell.edu/cfr/text/31/363.17 https://www.law.cornell.edu/cfr/text/31/363.17