{"ucp":{"version":"2026-01-01","services":{"dev.ucp.shopping.checkout":[{"version":"2026-01-01","transport":"rest","id":"checkout","endpoint":"https://hcrb.in/checkout-sessions","spec":"https://ucp.dev/specification/shopping/checkout"}]},"capabilities":{"dev.ucp.shopping.checkout":[{"version":"2026-01-01","schema":"https://ucp.dev/schemas/shopping/checkout.json"}]},"payment_handlers":{"org.x402.payment":[{"version":"2026-01-01","id":"x402_facilitator","spec":"https://hcrb.in/.well-known/gateway-spec.json","config":{"supported_networks":["base"],"chain_id":8453,"settlement_currency":"USDC","facilitator_url":"https://hcrb.in","recipient_address":"0xc59c85e661d34084a7769f955d17fd38254a6235","non_custodial":true}}]}},"code402":{"interoperability":{"status":"partial_custom_checkout","official_ap2_mandates":false,"acp_checkout":false,"note":"Code402 checkout input and signed approvals are custom; full UCP, ACP and AP2 lifecycle conformance is not asserted","protocol_checks":"https://hcrb.in/v1/protocols"},"specification_url":"https://hcrb.in/.well-known/gateway-spec.json","supported_transports":["REST"],"active_capabilities":["dev.ucp.shopping.checkout"],"supported_extensions_bitmask_8bit":{},"archetype_combinatorics":{"core_capabilities_count":1,"standard_extensions_count":0,"discrete_archetypes":1},"state_machine_operations":[{"operation_id":"create_checkout","method":"POST","endpoint":"/checkout-sessions","transition":"INIT -> ACTIVE","request_schema":{"merchant_address":"string, required — 0x-prefixed 20-byte Base address of the settlement recipient","line_items":"array, required, min 1 — [{id: string, title: string, priceMicros: positive integer string (USDC atomic units), quantity: positive safe integer}]","extensions":"array of capability URIs, optional","capability_mask":"integer, optional (8-bit extension bitmask)","validity_seconds":"integer, optional (session TTL)"},"request_example":{"merchant_address":"0xc59c85e661d34084a7769f955d17fd38254a6235","line_items":[{"id":"verification-example","title":"Verification example","priceMicros":"5000","quantity":1}]},"verified_live":"Schema-aligned example; not a completed payment or fulfillment claim."},{"operation_id":"get_checkout","method":"GET","endpoint":"/checkout-sessions/{id}","transition":"ACTIVE -> ACTIVE (State Observation)"},{"operation_id":"update_checkout","method":"PUT","endpoint":"/checkout-sessions/{id}","transition":"ACTIVE -> ACTIVE (Cart Line-Item / Scope Mutation)"},{"operation_id":"complete_checkout","method":"POST","endpoint":"/checkout-sessions/{id}/complete","transition":"ACTIVE -> COMPLETED (Terminal Commit upon x402 Receipt)"},{"operation_id":"cancel_checkout","method":"POST","endpoint":"/checkout-sessions/{id}/cancel","transition":"ACTIVE -> CANCELLED (Terminal Abort)"}],"economic_parameters":{"settlement_chain_id":8453,"settlement_chain_name":"base-mainnet","settlement_token_address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","settlement_token_symbol":"USDC","settlement_token_decimals":6,"protocol_fee_bps":0,"protocol_fee_note":"no protocol fee is deducted on any live settlement path; the payee receives the full amount","per_call_floor_micros":5000}}}