The Department of Health and Human Services plans to procure an annual membership from InChI Trust Ltd. on a sole source basis. This membership provides critical access to the InChI digital standard, an international software standard for chemical identification that is essential to the NCBI's mission and has no alternative. The performance location for the vendor is Cambridge, Cambridgeshire, United Kingdom. While this is a sole source notice, interested parties, especially small businesses, may submit a capability statement for consideration. Responses must be submitted to the specified Contracting Officer by 12:00 P.M. EST on Friday, January 23, 2026.