# Burs-IA x402 Seller
Machine-payable agent service using x402 v2.
GET /x402/agent-check — $0.01 on Base mainnet USDC
GET /x402/test/agent-check — $0.01 on Base Sepolia
POST /x402/verify-mcp — $0.01 on Base mainnet
POST /x402/test/verify-mcp — $0.01 on Base Sepolia; protocol/schema verification only, not security certification; no revenue
POST /x402/verify-receipt — $0.002 on Base mainnet USDC; Receipt Verify; READ_ONLY; durable x402 receipt; input schema in /openapi.json
POST /x402/verify-tool-contract — $0.003 on Base mainnet USDC; Tool/API Contract Preflight; READ_ONLY; durable x402 receipt; input schema in /openapi.json
POST /x402/verify-url — $0.003 on Base mainnet USDC; Public URL/TLS Check; READ_ONLY; durable x402 receipt; input schema in /openapi.json
POST /x402/verify-x402-seller — $0.005 on Base mainnet USDC; x402 Seller Preflight; READ_ONLY; durable x402 receipt; input schema in /openapi.json
POST /x402/verify-mcp-quick — $0.005 on Base mainnet USDC; MCP Quick Check; READ_ONLY; durable x402 receipt; input schema in /openapi.json
POST /x402/verify-mcp-2026 — $0.005 on Base mainnet USDC; MCP 2026-07-28 Compatibility; READ_ONLY; durable x402 receipt; input schema in /openapi.json
POST /x402/verify-a2a-card — $0.003 on Base mainnet USDC; A2A v1.0 Agent Card Validate; READ_ONLY; durable x402 receipt; input schema in /openapi.json
POST /x402/verify-agent-card-canonicality — $0.005 on Base mainnet USDC; Agent Card Canonicality; READ_ONLY; durable x402 receipt; input schema in /openapi.json
POST /x402/verify-mcp-retry-safety — $0.003 on Base mainnet USDC; MCP Mutating Tool Retry Safety; READ_ONLY; durable x402 receipt; input schema in /openapi.json
POST /x402/verify-mcp-token-boundary — $0.003 on Base mainnet USDC; MCP Token Audience Boundary; READ_ONLY; durable x402 receipt; input schema in /openapi.json
POST /x402/verify-mcp-oauth-discovery — $0.005 on Base mainnet USDC; MCP OAuth Discovery SSRF Check; READ_ONLY; durable x402 receipt; input schema in /openapi.json
POST /x402/verify-a2a-security-boundary — $0.004 on Base mainnet USDC; A2A Auth and Push Webhook Preflight; READ_ONLY; durable x402 receipt; input schema in /openapi.json
POST /x402/verify-x402-replay — $0.003 on Base mainnet USDC; x402 Replay and Dedup Receipt Verify; READ_ONLY; durable x402 receipt; input schema in /openapi.json
POST /x402/verify-x402-delivery-receipt — $0.003 on Base mainnet USDC; x402 Delivery Receipt Binding Verify; READ_ONLY; durable x402 receipt; input schema in /openapi.json
POST /x402/test/verify-receipt — $0.01 Base Sepolia test price; proposed live reference 0.002/call; READ_ONLY; no revenue
POST /x402/test/verify-tool-contract — $0.01 Base Sepolia test price; proposed live reference 0.003/call; READ_ONLY; no revenue
POST /x402/test/verify-url — $0.01 Base Sepolia test price; proposed live reference 0.003/call; READ_ONLY; no revenue
POST /x402/test/verify-x402-seller — $0.01 Base Sepolia test price; proposed live reference 0.005/call; READ_ONLY; no revenue
POST /x402/test/verify-mcp-quick — $0.01 Base Sepolia test price; proposed live reference 0.005/call; READ_ONLY; no revenue
POST /x402/test/verify-mcp-2026 — $0.01 Base Sepolia test price; proposed live reference 0.005/call; READ_ONLY; no revenue
POST /x402/test/verify-a2a-card — $0.01 Base Sepolia test price; proposed live reference 0.003/call; READ_ONLY; no revenue
POST /x402/test/verify-agent-card-canonicality — $0.01 Base Sepolia test price; proposed live reference 0.005/call; READ_ONLY; no revenue
POST /x402/test/verify-mcp-retry-safety — $0.01 Base Sepolia test price; proposed live reference 0.003/call; READ_ONLY; no revenue
POST /x402/test/verify-mcp-token-boundary — $0.01 Base Sepolia test price; proposed live reference 0.003/call; READ_ONLY; no revenue
POST /x402/test/verify-mcp-oauth-discovery — $0.01 Base Sepolia test price; proposed live reference 0.005/call; READ_ONLY; no revenue
POST /x402/test/verify-a2a-security-boundary — $0.01 Base Sepolia test price; proposed live reference 0.004/call; READ_ONLY; no revenue
POST /x402/test/verify-x402-replay — $0.01 Base Sepolia test price; proposed live reference 0.003/call; READ_ONLY; no revenue
POST /x402/test/verify-x402-delivery-receipt — $0.01 Base Sepolia test price; proposed live reference 0.003/call; READ_ONLY; no revenue
Free samples (no payment, fixed built-in input, sample:true, charged:false): muestra gratuita con entrada fija; para tu propio caso usa el endpoint pagado / free sample with a fixed input; for your own case use the paid endpoint
GET /x402/agent-check/sample — free sample of GET /x402/agent-check; live, real output on a fixed example
GET /x402/verify-receipt/sample — free sample of POST /x402/verify-receipt; live, real output on a fixed example
GET /x402/verify-tool-contract/sample — free sample of POST /x402/verify-tool-contract; live, real output on a fixed example
GET /x402/verify-url/sample — free sample of POST /x402/verify-url; live, real output on a fixed example
GET /x402/verify-x402-seller/sample — free sample of POST /x402/verify-x402-seller; live, real output on a fixed example
GET /x402/verify-mcp-quick/sample — free sample of POST /x402/verify-mcp-quick; live, real output on a fixed example
GET /x402/verify-mcp-2026/sample — free sample of POST /x402/verify-mcp-2026; live, real output on a fixed example
GET /x402/verify-a2a-card/sample — free sample of POST /x402/verify-a2a-card; live, real output on a fixed example
GET /x402/verify-agent-card-canonicality/sample — free sample of POST /x402/verify-agent-card-canonicality; live, real output on a fixed example
GET /x402/verify-mcp-retry-safety/sample — free sample of POST /x402/verify-mcp-retry-safety; live, real output on a fixed example
GET /x402/verify-mcp-token-boundary/sample — free sample of POST /x402/verify-mcp-token-boundary; live, real output on a fixed example
GET /x402/verify-mcp-oauth-discovery/sample — free sample of POST /x402/verify-mcp-oauth-discovery; cached sample from a built-in fixture
GET /x402/verify-a2a-security-boundary/sample — free sample of POST /x402/verify-a2a-security-boundary; live, real output on a fixed example
GET /x402/verify-x402-replay/sample — free sample of POST /x402/verify-x402-replay; live, real output on a fixed example
GET /x402/verify-x402-delivery-receipt/sample — free sample of POST /x402/verify-x402-delivery-receipt; live, real output on a fixed example
GET /x402/festivos-latam/sample — free sample of POST /x402/festivos-latam; live, real output on a fixed example
GET /x402/trm-colombia/sample — free sample of POST /x402/trm-colombia; real code on an embedded upstream record, upstream not contacted
POST /x402/festivos-latam — data offer: LatAm Public Holidays and Business Days; $0.002 on Base mainnet USDC; settle-on-success; unsigned receipt; input schema in /openapi.json
POST /x402/trm-colombia — data offer: Colombia TRM (official USD/COP rate); $0.003 on Base mainnet USDC; settle-on-success; unsigned receipt; input schema in /openapi.json
POST /x402/test/festivos-latam — $0.01 Base Sepolia test price; data offer; no revenue
POST /x402/test/trm-colombia — $0.01 Base Sepolia test price; data offer; no revenue
Only POST /x402/verify-mcp remains separately locked unless configured with distinct founder authority. This is not one of the 14 live read-only Grid SKUs.
Free need intake: POST /need (public-safe inputs only; no quote or payment intent is created)
Need schema: GET /need/schema
Catalog: /x402/catalog
OpenAPI with actual per-SKU x-payment-info: /openapi.json
Reliability: /api/reliability
Manifest: /.well-known/x402.json
For POST Grid utilities, send a valid JSON payload; invalid requests return 400 before charging.
A valid initial request returns 402, a quoteId, and PAYMENT-REQUIRED. Retry the same JSON with quoteId and a matching payment-signature.
The payment is verified before verification executes and settled only after a successful result; failed executions are not charged. No buyer, demand, second use or revenue is inferred from an unpaid 402 or an index listing.