{"data":[{"date":"2026-08-02","version":"v1","changes":["Added API keys, OAuth 2.0 authorization code + PKCE, and app installs.","Added Idempotency-Key support on all unsafe requests.","Added per-credential rate limits with X-RateLimit-* headers.","Added test-mode keys backed by simulated channels."]},{"date":"2026-08-10","version":"v1","changes":["Added GraphQL persisted queries: POST \/graphql\/persist, then send query_id.","Added GraphQL cost accounting: X-GraphQL-Complexity, and GET \/graphql\/usage.","Added per-relation sparse fieldsets: fields[self] and fields[<relation>]."]}],"deprecations":[],"policy":"Endpoints are deprecated for at least six months before removal, and send Deprecation and Sunset headers for the whole period."}