Washington State contractor licence and insurance expiration calendar built from two official public API extracts, each bounded to the 50,000 latest expiration-date rows, retrieved 2026-09-05.Edition 2026.09.05.7be5578e6c5f, prepared 2026-09-05. 100,000 records in CSV and JSONL, with schema, sample, included source material, provenance and SHA-256 checksums.One-time fixed download; no recurring service. Dates are reported expiration dates, not renewal confirmations. Multiple insurance records can exist per contractor. Personal contact details, policy numbers and precise addresses are omitted. Historical dates and missing values are preserved.