Search for and retrieve opportunity forecast and synopsis data from Grants.gov using the grantor System-to-System SOAP services

Steps

1. To use the Grantor S2S services (for federal agencies posting opportunities), register your agency system for S2S access at grants.gov/system-to-system/grantor-system-to-system; this requires a PKI certificate and a completed System-to-System User Agreement.
2. For applicant-side S2S (retrieving opportunity packages to pre-populate your grants management system), register as an Applicant S2S user and obtain PKI credentials from the Grants.gov team.
3. Invoke the GetOpportunityList SOAP operation by sending an XML envelope with filter elements including CFDANumber, FundingInstrumentType (G=Grant, CA=Cooperative Agreement, PC=Procurement Contract), AgencyCode, and OpportunityStatus.
4. The response returns a list of OpportunityInfo elements each containing OpportunityID, CFDANumbers, Title, AgencyCode, OpeningDate, ClosingDate, and SynopsisURL for full text.
5. To download an application package (for automated pre-filling), call GetApplicationPackage with the OpportunityID; the response includes form names, schemas, and instructions as a zipped archive.
6. For the newer REST-based workflow, use the search2 POST endpoint described in the REST API guide — the SOAP S2S path is legacy but still supported as of mid-2026.