generated: '2026-07-11' method: derived source: openapi/agricultural-marketing-service-mars-api.yaml summary: types: - http schemes: - name: BasicAuth type: http scheme: basic description: API key obtained from USDA AMS MyMarketNews registration. Use the API key as the username with an empty password, or encode as Base64 for Bearer auth. Public access without authentication is also available with lower rate limits. sources: - openapi/agricultural-marketing-service-mars-api.yaml