{ "name": "Spendkit", "spec_status": "Spendkit-specific machine reference; not an industry standard", "description": "Non-custodial payment authorization and onchain enforcement for AI Agents", "public_landing_url": "https://spendkit-alpha.vercel.app/", "dashboard_url": "https://spendkit-alpha.vercel.app/app", "dashboard_agent_configuration_url": "https://spendkit-alpha.vercel.app/app/agents", "configuration_sources": { "base_url": "Public hosted service URL https://spendkit-alpha.vercel.app; not generated in the dashboard", "client_id_and_secret": "Dashboard > AI Agents > choose Agent > Connect Agent; copy into protected Runtime configuration", "payment_wallet_signer": "Developer's own verified wallet or secure signer; private key is never created or shown by Spendkit Dashboard", "recipient_and_amount": "Application payment request", "idempotency_key": "Application's stable identifier for one logical payment" }, "docs_url": "https://spendkit-alpha.vercel.app/docs/", "http_mcp_quickstart_url": "https://spendkit-alpha.vercel.app/docs/api-quickstart/", "code_examples_url": "https://spendkit-alpha.vercel.app/docs/examples/", "code_example_files": { "javascript": "https://spendkit-alpha.vercel.app/examples/mcp/javascript.mjs", "python": "https://spendkit-alpha.vercel.app/examples/mcp/python.py", "go": "https://spendkit-alpha.vercel.app/examples/mcp/go.go", "cpp": "https://spendkit-alpha.vercel.app/examples/mcp/cpp.cpp" }, "mcp_tool_reference_url": "https://spendkit-alpha.vercel.app/docs/mcp-tools/", "ai_coding_agent_guide_url": "https://spendkit-alpha.vercel.app/docs/ai-coding-agents/", "llms_url": "https://spendkit-alpha.vercel.app/llms-full.txt", "mcp_url": "https://spendkit-alpha.vercel.app/mcp", "oauth_token_url": "https://spendkit-alpha.vercel.app/oauth/token", "oauth_client_credentials_request": { "method": "POST", "content_type": "application/x-www-form-urlencoded", "fields": ["grant_type=client_credentials", "client_id", "client_secret", "scope (optional subset of granted scopes)"], "response_fields": ["access_token", "token_type", "expires_in", "scope"] }, "oauth_metadata_url": "https://spendkit-alpha.vercel.app/.well-known/oauth-authorization-server", "protected_resource_metadata_url": "https://spendkit-alpha.vercel.app/.well-known/oauth-protected-resource", "auth_modes": [ "oauth2_client_credentials" ], "payment_model": "non-custodial-ai-agent-spending-policy-firewall", "server_broadcasts_payment": false, "tools": [ "spendkit_get_connection", "spendkit_get_policy", "spendkit_preview_payment", "spendkit_authorize_payment", "spendkit_record_payment", "spendkit_get_payment_status", "spendkit_list_payments" ], "mcp_call_format": { "transport": "POST /mcp, JSON-RPC 2.0 over HTTP", "preferred_protocol": "2026-07-28", "modern_required_headers": ["Authorization: Bearer ", "Content-Type: application/json", "MCP-Protocol-Version: 2026-07-28", "Mcp-Method: ", "Mcp-Name: for tools/call"], "modern_meta_required": ["io.modelcontextprotocol/protocolVersion", "io.modelcontextprotocol/clientInfo", "io.modelcontextprotocol/clientCapabilities"], "discovery_sequence": ["server/discover", "tools/list"], "method": "tools/call", "tool_name_path": "params.name", "arguments_path": "params.arguments", "data_path": "result.structuredContent", "denial_rule": "Inspect result.isError and structuredContent.allowed or accepted; HTTP 200 can contain a denial", "input_schema_discovery": "tools/list" }, "tool_contracts": [ { "name": "spendkit_get_connection", "scope": "authenticated_connection", "arguments": {}, "result_fields": ["connection", "agent", "network", "authentication", "paymentModel"] }, { "name": "spendkit_get_policy", "scope": "policy:read", "arguments": {}, "result_fields": ["ready", "reason?", "policyId?", "token?", "decimals?", "perTransactionLimit?", "dailyLimit?", "spentToday?", "remainingDaily?", "enabled?", "emergencyPaused?", "revoked?", "_raw?"] }, { "name": "spendkit_preview_payment", "scope": "payment:preview", "arguments": {"amount": "required positive decimal string", "recipient": "required nonzero EVM address", "token": "optional token symbol"}, "result_fields": ["allowed", "reason", "amount?", "amountAtomic?", "recipient?", "token?", "network?", "owner?", "policy?", "wallet?"] }, { "name": "spendkit_authorize_payment", "scope": "payment:authorize", "arguments": {"amount": "required positive decimal string", "recipient": "required nonzero EVM address", "token": "optional token symbol", "idempotencyKey": "required string, 1-128 characters"}, "result_fields": ["allowed", "reason?", "duplicate?", "intentId?", "status?", "authorization?", "signature?", "transaction?"], "transaction_fields": ["chainId", "from", "to", "data", "value"] }, { "name": "spendkit_record_payment", "scope": "payment:record", "arguments": {"intentId": "required nonempty string", "txHash": "required 0x-prefixed 32-byte transaction hash"}, "result_fields": ["accepted", "error?", "intentId?", "status?", "txHash?"], "integration_note": "Keep this call after wallet submission for prompt status and Payment Activity updates. If it fails, retry with the same intentId and txHash; never resend the wallet transaction just to retry recording. Onchain Router limits remain enforced." }, { "name": "spendkit_get_payment_status", "scope": "payment:read", "arguments": {"intentId": "required nonempty string"}, "result_fields": ["intentId?", "status", "txHash?", "failureCode?", "failureMessage?", "recipient?", "amountAtomic?", "token?", "policyId?", "createdAt?", "updatedAt?"] }, { "name": "spendkit_list_payments", "scope": "payment:read", "arguments": {"limit": "optional integer, 1-100; default 50"}, "result_fields": ["rows"] } ], "public_policy_selector": false, "token_argument_semantics": "symbol such as USDG, not a contract address; omit to use Agent default", "networks": [ { "key": "arbitrum-sepolia", "chain_id": 421614, "token": "USDG" } ], "current_demo_status": { "network": "arbitrum-sepolia", "registered_router": "0xe388644B4115fbE029FA4acC3b20a47600c4bA16", "router_architecture": "signed-authorization-v3", "runtime_checks_router_schema": true, "latest_published_confirmed_payment_uses_current_router": false, "evidence_note": "Published confirmed payment is historical evidence from the earlier Router. A new confirmed payment is needed for the current Payment Wallet sender path." }, "runtime_access": { "read_only_scopes": [ "policy:read", "payment:preview", "payment:read" ], "full_scopes": [ "policy:read", "payment:preview", "payment:authorize", "payment:read", "payment:record" ], "capability_rule": "lastUsedAt alone does not prove payment authorization; payment:authorize scope is required", "upgrade": "read-only active credentials can be rotated to a new full credential after Wallet + Policy protection is ready" }, "local_stdio_bridge": { "command": "npm run mcp:bridge", "purpose": "Acquire/refresh OAuth client_credentials access tokens and forward stdio JSON-RPC to remote Spendkit MCP", "submits_evm_transactions": false }, "security": { "wallet_challenges": "durable one-time tenant-bound challenges", "shared_rate_limits": true, "scheduled_reconciliation": "/api/internal/reconcile", "signer_modes": [ "local-private-key", "remote-signer" ] }, "legal": { "privacy_url": "https://spendkit-alpha.vercel.app/privacy/", "terms_url": "https://spendkit-alpha.vercel.app/terms/", "security_url": "https://spendkit-alpha.vercel.app/security/" }, "mcp_protocol": { "preferred": "2026-07-28", "legacy_fallback": "2025-11-25", "modern_lifecycle": "stateless server/discover", "modern_result_cache_hints": true }, "runtime_reliability": { "doctor_command": "npm run agent:doctor", "heartbeat_tool": "spendkit_get_connection", "default_heartbeat_ms": 120000, "http_timeout_ms": 10000, "http_retries": 2, "retry_after_supported": true, "trace_header": "X-Spendkit-Trace-Id", "structured_recovery": true, "blockchain_tx_auto_retry": false, "recent_activity_semantics": "lastUsedAt means recently observed authenticated MCP usage; it is not proof the Runtime or its bound Payment Wallet client is currently online" }, "judge_brief_url": "https://spendkit-alpha.vercel.app/open-house/", "buildathon_context": { "program": "Arbitrum Open House Singapore Buildathon", "network": "arbitrum-sepolia", "chain_id": 421614, "asset": "Paxos Test USDG", "evidence_url": "https://spendkit-alpha.vercel.app/open-house/#evidence", "latest_verified_payment_tx": "0xa0b16825347b8749a27df7f2048cacd8a25a88f71479d7c17fbfe4fd89cabd43", "latest_verified_payment_block": 312101737, "latest_verified_payment_amount": "0.01 USDG", "latest_verified_payment_status": "CONFIRMED", "mcp_sdk_production_probes": "36/36 PASS", "full_mcp_conformance_claimed": false }, "demo_url": "https://spendkit-alpha.vercel.app/demo/", "demo_quality_standard": { "repository_file": "DEMO_QUALITY_STANDARD.md", "target": "CHAMPION_READY", "score_threshold": 95, "hard_gates_required": true, "target_duration": "2:45-3:05", "runtime_payment_flow": { "sequence": [ "policy_preview", "authorization", "per_payment_user_confirmation", "payment_wallet_router_submission", "record_and_reconcile" ], "amount_limits_source": "live_policy_and_router", "payment_wallet_key_required": true } }, "server_pays_gas": false, "transaction_sender": "bound_agent_payment_wallet", "wallet_roles": { "spendkit_admin_authorization_signer": { "address": "0x3EA76F9b8489AD51D5e00dcb8bE5706049fC89F1", "responsibilities": [ "router_admin", "policy_management", "pause_control", "authorization_signing" ], "demo_shared_admin_signer": true }, "agent_payment_wallet": { "address": "0x8F2ab541a145671542c2ff9c7be8a46813ff83dc", "responsibilities": [ "holds_usdg", "submits_router_transaction", "pays_gas", "payment_token_source" ] }, "demo_recipient": { "address": "0x33017f263aDb598a5E4Cc0c66F986b9893746F5C", "responsibility": "receives_usdg" } } }