# Boundary Guard x402
> Paid REST and MCP tools for x402 seller checks, paid-path health probes, agent-tool readiness, launch packs, and deterministic receipts.

MCP endpoint: https://x402-resource-scanner.vercel.app/mcp
Category: Agent Verification & Security
Docs: https://x402-resource-scanner.vercel.app/llms.txt
OpenAPI: https://x402-resource-scanner.vercel.app/openapi.json
x402 manifest: https://x402-resource-scanner.vercel.app/.well-known/x402
Agentic.Market indexing path: CDP Bazaar; requires one successful CDP Facilitator settle for a Bazaar-enabled x402 route.
Virtuals ACP listing path: register a Provider or Hybrid agent, then publish job offerings and read-only resources that point at these public endpoints.

Tools:
- boundary_guard_check: Create a Boundary Guard pre-action checkpoint receipt for an agent request, policy decision, and result summary. Suggested xpay price: $0.03/call. ($0.03)
- scan_x402_resource: Read-only scan of public x402/OpenAPI metadata and optional marketplace listing staleness. Suggested xpay price: $0.10/call. ($0.10)
- probe_x402_paid_path: Probe a public x402 endpoint without payment, parse the 402 challenge, compare expected network/asset/price, and return a deterministic health receipt. Suggested xpay price: $0.50/call. ($0.50)
- check_agent_tool_readiness: Check whether an x402/agent-facing tool is ready for agent routing, marketplace listing, and paid-path monitoring, including public agent discovery surfaces (/llms.txt, /agents.txt, /.well-known/mcp.json, /mcp). Tiers: quick $1, deep $5, report $10. ($1.00)
- generate_x402_launch_pack: Generate marketplace-safe listing copy, buyer FAQ, launch checklist, approval packet, and claim boundaries for x402/MCP sellers from readiness evidence. Tiers: single $9, service $29, premium $49. ($9.00)
- generate_trust_receipt: Generate a deterministic trust receipt from sanitized request/policy/result/payment summaries. Do not submit raw auth headers, cookies, API keys, private keys, payment signatures, payment response headers, customer prompts, customer documents, or payer-identifying evidence. Suggested xpay price: $0.05/call. ($0.05)

Buyer outcomes:
- Reduce accidental paid-tool or write-action risk with a cheap pre-action checkpoint.
- Attach deterministic evidence hashes to agent workflow logs and support tickets.
- Find x402 listing gaps before submitting to marketplaces or charging agents.
- Prepare Agentic.Market/CDP Bazaar indexing evidence with clear resource URLs, schemas, examples, and paid-route metadata.
- Prepare Virtuals ACP provider-agent listings with business description, job-offering copy, resource URLs, schemas, and SLA/pricing guidance.
- Generate marketplace-safe x402 launch copy, buyer FAQs, checklist items, and approval packets.
- Probe paid endpoints for healthy unpaid 402/payment metadata without signing or spending.

Use when an agent needs a cheap pre-action trust checkpoint, a deterministic receipt, an unpaid x402 paid-path health probe, a launch pack, or a read-only x402/OpenAPI readiness scan before marketplace listing or paid tool calls.
Claim boundary: receipts prove what this service received, hashed, and returned; they do not prove downstream real-world execution.