{"schema_version":"1.0","spec":"fiscal402.well-known","convention":"Fiscal402 convention — not an IANA-registered well-known suffix","name":"Fiscal402","description":"Non-custodial post-settlement fiscal infrastructure for x402, producing EU fiscal determinations, UBL 2.1 artifacts and signed Fiscal402 receipts.","category":"eu_fiscal_compliance","protocol":"x402","custody":"non_custodial","protocol_version":"0.3.0","tax_ruleset_version":"eu-vat-oss-2026.09","updated_at":"2026-09-11T16:00:00Z","capabilities":["vat_classification","vies_lookup","oss_b2c","reverse_charge_b2b","ubl_2_1","historical_fx","audit_ledger","signed_webhooks","signed_receipt","sandbox_simulate"],"receipt_versions":{"1.0.0":{"status":"supported","default_for":"eu-vat"},"2.0.0":{"status":"experimental","default_for":"uk-vat"}},"payment_protocols":{"x402":{"status":"supported","versions":["2"],"schemes":["exact"],"ingest":"http"},"evm-transfer":{"status":"supported","versions":["1"],"schemes":["erc20-transfer"],"ingest":"library"},"mpp":{"status":"planned","ingest":"none"},"ap2":{"status":"planned","ingest":"none"}},"jurisdictions":{"eu-vat":{"status":"supported","ruleset_version":"eu-vat-oss-2026.09","determination":"supported","artifacts":"supported","receipt_v1":"supported","receipt_v2":"unsupported"},"uk-vat":{"status":"experimental","ruleset_version":"uk-vat-2026.09","determination":"supported","artifacts":"experimental","receipt_v1":"unsupported","receipt_v2":"experimental"}},"supported_chains":["eip155:8453","eip155:1"],"supported_assets":[{"symbol":"USDC","network":"eip155:8453"},{"symbol":"USDC","network":"eip155:1"}],"endpoints":{"capabilities":"https://api.fiscal402.com/v1/capabilities","capabilities_check":"https://api.fiscal402.com/v1/capabilities/check","pricing":"https://api.fiscal402.com/v1/pricing","reliability":"https://api.fiscal402.com/v1/reliability","discovery":"https://api.fiscal402.com/v1/discovery","evaluate":"https://api.fiscal402.com/v1/compliance/evaluate","preference":"https://api.fiscal402.com/v1/preference","seller_value":"https://api.fiscal402.com/v1/seller-value","process":"https://api.fiscal402.com/settlements","sandbox":"https://api.fiscal402.com/sandbox/v1","receipt":"https://api.fiscal402.com/v1/receipts/{id}","jwks":"https://api.fiscal402.com/.well-known/jwks.json"},"pricing":{"sandbox":{"evaluate":0,"simulate":0,"quota_per_agent_day":10},"production":{"model":"basis_points","beta":{"active":true,"fee_bps":0,"label":"free_during_beta"},"standard":{"fee_bps":50,"display_rate":"0.5%"},"standard_bps":50,"display_rate":"0.5%","current_fee_bps":0,"custom_pricing":true,"custom_high_volume":true,"settlement_integrated_collection":false,"collection":"policy_accrual_not_settlement_split","x402_gate":false,"ingest":"POST /settlements with optional X-Fiscal402-Key"}},"sandbox":{"evaluate":"https://api.fiscal402.com/v1/compliance/evaluate","simulate":"https://api.fiscal402.com/sandbox/v1/simulate","quota":10,"watermark":true},"security":{"custody":"none","ingest_header":"X-Fiscal402-Key","webhook_signature":"HMAC-SHA256 timestamp.rawBody","receipt_signature":"ed25519","idempotency":"unique(network, txHash)"},"reliability":"https://api.fiscal402.com/v1/reliability","documentation":{"llms":"https://www.fiscal402.com/llms.txt","llms_full":"https://www.fiscal402.com/llms-full.txt","openapi":"https://api.fiscal402.com/openapi.json","discover":"https://api.fiscal402.com/discover","discovery_doc":"DISCOVERY.md","github":"https://github.com/Fiscal402/Fiscal402","website":"https://www.fiscal402.com","docs":"https://www.fiscal402.com/docs"},"agent_card":"https://api.fiscal402.com/.well-known/agent-card.json","openapi":"https://api.fiscal402.com/openapi.json","mcp":{"implemented":false,"status":"not_implemented"},"github":"https://github.com/Fiscal402/Fiscal402","website":"https://www.fiscal402.com","legal":{"is":["technical_classification_engine","deterministic_artifact_generator"],"not":["tax_advice","guarantee_of_tax_authority_acceptance","national_clearance_einvoice_network","settlement_native_fee_collection"]}}