SAM.gov Used to verify if a business has a SAMS profile and DUNS number, which are needed to apply for federal contracts https://www.sam.gov/SAM/ https://gsa.github.io/sam_api/sam/search.html
Beta.SAM.gov used to find available contracts https://beta.sam.gov/search?keywords=&sort=-modifiedDate&index=opp&is_active=true&page=1&naics=518210&pop_zip=&date_filter_index=0&inactive_filter_values=false https://open.gsa.gov/api/get-opportunities-public-api/
USA Spending.com Find the department budgets by state https://www.usaspending.gov/#/search https://api.usaspending.gov/docs/endpoints https://api.usaspending.gov/api/v2/search/spending_by_category/ https://github.com/fedspendingtransparency/usaspending-api/blob/master/usaspending_api/api_contracts/contracts/v2/search/spending_by_category.md
Complete usaspending.com search https://www.usaspending.gov/#/search/376b7c7d753001886058fa2504d8bb14
(Procurement) Needed to find upcoming contracts ... still working on this
naics - 518210