# Standard Industrial Classification

Lookup and search for 1987 U.S. Standard Industrial Classification codes and NAICS crosswalks.

## Access

- Kind: api
- Audience: public
- Access: open
- Authentication: No authentication is required for public lookups.
- Lifecycle: active
- Observed health: operational

## Integration links

- Base URL: https://sic.datasourceapi.com
- Documentation: https://sic.datasourceapi.com/docs
- Repository: https://github.com/coopalliance/cca-cucm-services
- Catalog metadata: https://services.datasourceapi.com/api/v1/services/sic

## Capabilities

- business-classification
- industry-codes
- sic
- sic-naics-crosswalk

## Provenance and freshness

- U.S. Department of Labor: 1987 Standard Industrial Classification. (https://www.osha.gov/data/sic-manual)
- U.S. Census Bureau: SIC-to-NAICS crosswalks. (https://www.census.gov/naics/)

Update cadence: Static classification release with deployment-based updates.. Metadata last verified: 2026-09-03.


## Agent readiness

limited (45/100): Public docs exist, but a directly attributable implementation repository and OpenAPI URL were not confirmed.

## Examples

### SIC lookup

Look up an SIC code.

```http
GET https://sic.datasourceapi.com/api/v1/sic/0111
```