SpendPreflight field noteshttps://spendpreflight.com/blog/Operator notes on x402 listing metadata and payment preflight.en-usHow to get your x402 endpoint listed in Coinbase Bazaar (and stay listed)https://spendpreflight.com/blog/get-listed-coinbase-bazaar.htmlhttps://spendpreflight.com/blog/get-listed-coinbase-bazaar.htmlMon, 26 Oct 2026 19:10:00 GMTA practical seller guide to x402 discovery metadata, settlement, Coinbase Bazaar validation, policy and repeatable unpaid checks.x402 seller checklist: 12 things that break agent paymentshttps://spendpreflight.com/blog/x402-seller-checklist.htmlhttps://spendpreflight.com/blog/x402-seller-checklist.htmlMon, 26 Oct 2026 19:10:00 GMTTwelve practical checks for x402 sellers: transport, payment negotiation, deployed configuration, MCP clients and discovery metadata.Coinbase is delisting x402 endpoints for agent-hijack wording: how to check yourshttps://spendpreflight.com/blog/bazaar-agent-hijack-wording.htmlhttps://spendpreflight.com/blog/bazaar-agent-hijack-wording.htmlSat, 24 Oct 2026 05:35:00 GMTCoinbase's October 13 metadata policy, five heuristic wording patterns to review, and links to free Lint and the aggregate tracker.How to get a receipt for a USDC paymenthttps://spendpreflight.com/blog/usdc-payment-receipt.htmlhttps://spendpreflight.com/blog/usdc-payment-receipt.htmlMon, 26 Oct 2026 20:00:00 GMTNative Base USDC receipts, exact transfer selection and bookkeeping limits.