# PSC code lookup A PSC (Product and Service Code) is the four-character code every federal contract action uses to say what was bought. Codes starting with a digit are products, codes starting with a letter are services, and codes starting with A or AA-AZ are research and development. Search by keyword or code. NAICS classifies the industry of the business; PSC classifies the product or service on each contract action.Data as of 2026-11-12, from the PSC manual (Acquisition.gov).Official source: [Acquisition.gov PSC manual](https://www.acquisition.gov/psc-manual) ## Key facts | Length | 4 characters | | --- | --- | | Products | Codes that start with a digit (federal supply classes) | | Services | Codes that start with a letter | | R&D | Codes that start with A | | Manual | Acquisition.gov PSC manual | ## Get this as JSON ``` curl "https://samgovapi.io/api/v1/psc/D302" \ -H "Authorization: Bearer sg_YOUR_KEY" ``` Keys start free, with no card. [Get a free API key](https://samgovapi.io/sign-up) or read the [docs](https://samgovapi.io/docs). ## Questions What is the difference between PSC and NAICS?NAICS classifies the industry of the business; PSC classifies the product or service on each contract action. A contract carries one of each.Where are PSC codes used?On every federal contract action reported to FPDS and in SAM.gov contract opportunities. ## Related - [NAICS code lookup](https://samgovapi.io/naics-code-lookup) - [Opportunity search](https://samgovapi.io/opportunity-search)Independent. Not affiliated with, endorsed by or sponsored by GSA, SAM.gov or any U.S. government agency. Registering in SAM.gov is free at sam.gov.

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HTML version: https://samgovapi.io/psc-code-lookup . Markdown: https://samgovapi.io/psc-code-lookup.md

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