Shipping an x402 Service
by Fieldproof
$0+
A working paid API is still invisible. Ten defects that kept a revenue-capable x402 service from being found, and the exact fix for each. Every one was live in Fieldproof's own service first.
Buy with the button on this page if you want the playbook in your Gumroad library. The same markdown is also free to read on GitHub — no Fieldproof account.
What's inside: the Bazaar declaration that never reaches the facilitator; why directory GET probes read a paid route as dead; origin-versus-path registration; official MCP registry domain auth; dynamic x402 pricing; POSTing {} to learn a directory's schema; and a declaration the facilitator silently rejects.
The ZIP is this playbook plus a start-here note. The Policy Gate engine stays free to inspect at fieldproofhq/policy-gate.
Price groups: start here $39 (CMO). One seat $42 (CFO, COO, CTO, CISO, or the Governance Pack). The table $168 — five seats, CMO included, $39 off. Shelf: store.3labs.io.