# Smithsonian Open Access > Cultural heritage items for United States. Access: Public API, key needed. Terms checked November 2, 2026. - Slug: smithsonian-open-access - Page: https://api.lineage.rexstjohn.com/sources/smithsonian-open-access - JSON: https://api.lineage.rexstjohn.com/v1/sources/smithsonian-open-access - Records: Cultural heritage items - Places: United States - Years: Not stated by the source - Access method: api - Key required: yes - Rate limit: api.data.gov keys: 1,000 requests per hour per key. DEMO_KEY: 30 per hour and 50 per day per IP address. - Status: live - Review: verified, checked by hand on 2026-11-02 - Homepage: https://www.si.edu/openaccess - API docs: https://edan.si.edu/openaccess/apidocs/ - Terms: https://api.data.gov/docs/developer-manual/ ## Notes Search at https://api.si.edu/openaccess/api/v1.0/search needs an api.data.gov key. Lineage holds none and adds no new keys, so stage 6 lists these nodes as not executable on this server. The DEMO_KEY answered a test search on the day of review but is for exploring only and is never used in production. The apidocs page renders with script and its text was not read. Open Access items are CC0; other items carry their own rights. ## Evidence - https://api.data.gov/docs/developer-manual/ - https://edan.si.edu/openaccess/apidocs/ - https://api.si.edu/openaccess/api/v1.0/search?q=Burgoyne&api_key=DEMO_KEY&rows=1 ## Status Live at the last check, 2026-11-03 04:33 UTC. HTTP 403 in 285 ms. One check a day. This file describes a catalog entry only.