Operator notes
Technical articles by the team operating SpendPreflight.
How to get your x402 endpoint listed in Coinbase Bazaar (and stay listed)
October 26, 2026 · A practical seller guide to x402 discovery metadata, settlement, Coinbase Bazaar validation, policy and repeatable unpaid checks.
x402 seller checklist: 12 things that break agent payments
October 26, 2026 · Twelve 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 yours
October 23, 2026 (Pacific) · The verified October 13 policy, five heuristic patterns and free listing checks.
Scout: observe an x402 endpoint before your agent pays
October 10, 2026 · Partial staging evidence and production limitations.
Before your agent pays: a preflight checklist for x402
Checks to enforce before signing a payment.