{"rule_id":"AB-035","category":"payments","icon":"📄","title":"Payment Discovery File","short_description":"Your site publishes a file that describes all payment options in one place.","user_value":"A payment discovery file lets agents understand your pricing model before making any requests.","wrong_example":"No payment discovery file. Agents have to trigger paid endpoints to learn pricing.","right_example":"A published file describes all payment options upfront.","effort_hint":"moderate","estimated_cost":"$10-50","severity":"medium","pillar":"executability","version":"1.0.0","counted_in_score":true,"check":{"type":"http_fetch","sources":["x402"],"target":"/.well-known/x402.json"},"fix":{"eligible":true,"type":"deterministic","note":"Create /.well-known/x402.json with payment discovery metadata"},"checklist_anchor":"#AB-035","checklist_url":"/agent-readiness-checklist#AB-035","html_url":"/rules/AB-035","json_url":"/rules/AB-035.json","related_rules":[{"rule_id":"AB-030","title":"Paid Endpoint Response","category":"payments"},{"rule_id":"AB-031","title":"Payment Challenge Decodable","category":"payments"},{"rule_id":"AB-032","title":"Payment Required Header","category":"payments"},{"rule_id":"AB-033","title":"Payment Recipient","category":"payments"},{"rule_id":"AB-034","title":"Payment Amount","category":"payments"},{"rule_id":"AB-038","title":"Payment Facilitator","category":"payments"},{"rule_id":"AB-070","title":"Lightning Payment Support","category":"payments"},{"rule_id":"AB-071","title":"Lightning Payment Details","category":"payments"},{"rule_id":"AB-088","title":"MPP (Machine Payments Protocol) Support","category":"payments"},{"rule_id":"AB-093","title":"SPT (Stripe Payment Terms) Support","category":"payments"}]}