Seller enablement for agentic commerce

Launch an x402 API that agents can pay for, trust, and prove.

Package one paid endpoint with Boundary Guard receipts, workflow audit, receipt verification, seller-safe marketplace copy, and a repeatable seed-proof checklist.

Use the agent-readable kit Review Boundary Guard docs Request launch help

Who this helps

Target sellers

x402 API sellers
agent tool marketplaces
wallet-capable agent builders
MCP and paid-tool routers
teams adding receipts to paid agent workflows

Proof boundary

Boundary Guard has 13 paid endpoint records in source discovery metadata. All 13 are seeded through internal Base-mainnet seed payments and visible in CDP discovery metadata plus Agentic detail. This is operational proof only; it is not a claim of customer revenue, customer adoption, or third-party endorsement.

Launch checklist

Expose a paid x402 endpoint

Serve OpenAPI, /llms.txt, /.well-known/x402, provider URL, docs URL, category, tags, and exact Base-mainnet USDC pricing.

Wrap the agent-facing workflow

Run Boundary Guard /guard before irreversible action, /workflow-audit before multi-step execution, and /receipt-verify before trusting supplied payment evidence.

Seed once with a controlled wallet

Make one internal paid call per endpoint, record the non-secret tx hash, route, amount, network, and receipt id, and label it internal seed proof.

Verify discovery

Check the live Render paid host, Vercel preview, x402 402 challenge, CDP merchant discovery, Agentic detail, OpenAPI, llms.txt, and well-known inventory.

Publish proof-safe copy

Say what is live and seeded. Do not claim customer revenue, marketplace ranking, partner endorsement, or production adoption until external evidence exists.

Example wrapper

Call a paid endpoint, keep the x402 payment response, then verify the receipt package before an agent trusts the result.

import requests

paid_response = wallet_client.post(
    "https://seller.example/api/quote",
    json={"symbol": "ETH"},
)

verification = requests.post(
    "https://boundary-guard-x402.onrender.com/receipt-verify",
    json={
        "receipt": paid_response.json()["boundary_receipt"],
        "allowed_policy_versions": ["guard-v1", "workflow-audit-v1"],
        "payment": {
            "network": "eip155:8453",
            "currency": "USDC",
            "amount_atomic": 10000,
            "tx_hash": paid_response.headers.get("x-payment-tx-hash"),
            "resource": "https://seller.example/api/quote",
        },
    },
)
verification.raise_for_status()
assert verification.json()["decision"] in {"accept", "review"}

Marketplace copy

Title

x402 Receipt Wrapper for Agent APIs

Short description

Add pre-flight guardrails, workflow audit, and receipt verification to paid x402 endpoints before agents trust the result.

Buyer queries

x402 receipt verification
agent payment safety
paid API guardrails
agent workflow audit
Base USDC API receipts
MCP payment trust

Seed-proof checklist

Route and method
Price, currency, and network
HTTP 402 challenge before payment
Transaction hash or payment reference, redacted when needed
Boundary Guard receipt id and policy version
Render/Vercel manifest check
CDP merchant discovery check
Agentic detail check
x402scan or external transaction check when available