{"audience":["API sellers","SaaS vendors","data providers","marketplaces","merchant backends","MCP/tool operators"],"boundaries":["Gregers-built public reference kit using Concordium accountable-agent identity evidence; not official Concordium/Foundation output.","No Cloudflare, x402, wallet, merchant, data-provider, marketplace, Coinbase, Base, You.com, Glassnode, Mastercard, Crossmint, or exchange partnership or production integration is claimed.","The kit does not execute a fresh payment, transfer, trade, withdrawal, API-key change, custody action, fulfilment, or production tool call.","Some linked payment evidence is recorded fixture evidence; production use would replace fixtures with provider/gateway verification and consumed nonce/idempotency state.","Acceptance checks are advisory proof surfaces until integrated into a real seller policy engine."],"included_gregers_surfaces":{"accountable_x402_tool_gate":{"proves":"paid tool output gated by recorded payment evidence plus live Agent Registry passport check","route":"https://gregers.dev/accountable-x402-tool"},"agent_acceptance_check":{"proves":"merchant/counterparty preflight before accepting work, payment, or API access","route":"https://gregers.dev/agent-acceptance-check"},"agent_wallet_x402_receipt":{"proves":"accountable agent-wallet payment receipt pattern","route":"https://gregers.dev/gregers-agent-wallet-x402"},"x402_acceptance_sandbox":{"proves":"seller-side accept/challenge/reject scenarios for x402-style agent buyers","route":"https://gregers.dev/x402-acceptance-sandbox"},"x402_ask_before_pay":{"proves":"seller asks identity/accountability questions before releasing payment terms","route":"https://gregers.dev/x402-ask-before-pay"}},"kit_hash_canonicalization":{"algorithm":"SHA-256","canonical_json":"json.dumps(obj, sort_keys=True, separators=(',',':'), ensure_ascii=False)","encoding":"UTF-8","excluded_fields":["kit_hash_sha256"]},"kit_hash_sha256":"c991d55913829153135773ed397a5de63dac822e5d6e19612e0d29812e8373ae","ok":true,"primary_route":"https://gregers.dev/accountable-x402-seller-kit","schema":"gregers.accountable-x402-seller-kit.v1","seller_decision_model":[{"example":"https://gregers.dev/api/accountable-x402/challenge","proof":"x402-style 402 challenge or seller terms object","question":"What resource is requested and what payment/terms apply?","step":"price_or_challenge"},{"example":"https://gregers.dev/agent-passport/40","proof":"Concordium Agent Registry passport/status","question":"Which registered accountable agent is asking?","step":"verify_agent_identity"},{"example":"https://gregers.dev/api/agent-acceptance-check?token_id=40&amount=0.25%20USDC&resource=fresh-market-data-api-call&policy=trading-data-freshness-and-spend-cap","proof":"agent acceptance preflight receipt","question":"Is the resource, amount, purpose and spend cap allowed?","step":"check_policy"},{"example":"https://gregers.dev/static/cloudflare-x402-accountable-tool-call.json","example_label":"recorded 0x/x402-style payment fixture; not Cloudflare gateway settlement proof","proof":"recorded_0x_x402_style_payment_fixture_not_cloudflare_gateway or future provider/gateway verification","question":"What payment/wallet evidence is tied to this release?","step":"bind_payment_evidence"},{"example":"https://gregers.dev/api/accountable-x402/receipts/ad999ceafad40e21","proof":"tamper-evident receipt with passport snapshot and boundaries","question":"What durable receipt explains why access was released?","step":"serve_with_receipt"}],"side_effects":{"fresh_payment_verified":false,"live_payment_broadcast":false,"production_api_served":false,"registry_read_possible_on_linked_live_api":true},"status":"public_reference_kit_no_partner_integration","thesis":"Sellers should accept autonomous x402-style agent payments only after accountable identity, wallet/payment evidence, policy fit, and receipt binding pass.","verdicts":{"high_risk_action_or_withdrawal":"require_explicit_human_approval","payment_seen_but_policy_mismatch":"reject_before_release; refund handling is merchant/provider policy out of scope","registered_agent_missing_wallet_or_card_hash":"challenge_or_manual_review","registered_agent_under_policy_cap":"accept_and_serve_with_receipt","unregistered_or_inactive_agent":"reject_before_serving"},"what_to_build_next":["Replace recorded payment fixture with a selected provider/gateway verifier.","Add seller-owned consumed nonce and idempotency store for production replay protection.","Let each merchant define policy thresholds and reviewer escalation rules.","Package the decision model as a small SDK or reverse-proxy preflight hook."]}