Building labeling into your product? Compare disclosure-law APIs on:
- Machine-readable rules. You need "California requires visible disclosure on AI political ads" as structured data, not prose. - Versioning. Laws change; your API responses should carry effective dates and superseded flags. - Coverage. EU AI Act Article 50 plus US state disclosure duties is the minimum viable set. - Latency and uptime SLA. Compliance checks in a publishing flow cannot take seconds. - Licensing clarity. Can you cache rules? Redistribute verdicts? Read the terms. - Price. Usage-based for high volume, per-check for low. Sources: Congress.gov, NCSL The build-vs-buy math: maintaining a 50-state plus EU disclosure database in-house costs an engineer plus a lawyer's review time. For most teams, that equation ends at "buy."