generated: '2026-09-25' method: derived source: openapi/kronos-seshat-openapi.json summary: types: - apiKey api_key_in: - header schemes: - name: x402Payment type: apiKey in: header parameter: PAYMENT-SIGNATURE description: x402 v2 payment payload. Required for paid endpoints when the service manifest at /.well-known/x402 has enforcement=active_mainnet. Send the signed payment in this header (or the legacy X-PAYMENT header) to satisfy the 402 challenge. sources: - openapi/kronos-seshat-openapi.json