Use this read-only tool to retrieve SEC XBRL-backed fundamentals for one crypto public company ticker. It returns filing period, entity identifiers, filing form, core financial values, provenance, and optional segment or related-party containers when requested. Parameters: ticker is required; period is optional YYYY-MM-DD; include_segments and include_related_party request additional containers when available and otherwise return availability metadata. Behavior: read-only and idempotent; it performs one HTTPS read, has no destructive side effects, and does not modify SEC data, accounts, files, or wallets. Use it when the user asks for revenue, net income, assets, cash, liabilities, equity, SEC filing context, or fact provenance; use alpha_signals or covenant_stress for modeled signal interpretation.