OP

OpenSOSData API

Search: look up US business entities and UCC filings by name and state, in bulk or one at a time

OpenAPI 3.1.011 operations16 schemas1 revision

Changes

Full history
Updated on 2026-10-12

Subscribe to this API to generate a client from its schema and get a pull request each time the schema changes.

Source

View schema
Document
api.opensosdata.com · JSON, 51 KB
Retrieved
Oct 12, 2026
Digest
212a12186161

For agents

Every page here has a markdown twin. The overview is one fetch; the llms.txt lists every operation with a link to its own markdown.

curl https://skmtc.dev/opensosdata/apis/opensosdata-api.md
curl https://skmtc.dev/opensosdata/apis/opensosdata-api/llms.txt