{"openapi":"3.1.0","info":{"title":"China Sourcing Audit Tools","version":"1.0.0","description":"AI tools for vetting Chinese suppliers and import risk before money moves: factory-vs-trader verification, landed cost, payment red flags, audit checklist, certification checks, full audit chain. Pay-per-call in USDC on Base via x402.","x-guidance":"Use POST /verify_supplier with a JSON body containing company_name (and optionally country/usci) to check whether a Chinese company is a real factory or a trading middleman. POST /landed_cost_calc with kg, dimensions (cm), goods value and shipping mode for true landed cost. POST /payment_red_flags with payee details to screen wire-fraud risk before deposit. POST /audit_checklist to generate the pre-payment audit checklist. POST /certification_check with a product type for required certifications. POST /full_supplier_audit with company_name to run the complete audit chain in one call. All endpoints return HTTP 402 with an x402 v2 payment challenge when payment is required.","contact":{"email":"lu7897859@gmail.com"},"x-x402-settlement":"public facilitator (arispay/dexter/xpay), gas sponsored, Base mainnet eip155:8453"},"paths":{"/verify_supplier":{"post":{"operationId":"verifySupplier","summary":"Verify if a Chinese company is a real factory or trading middleman","tags":["Supplier Verification"],"x-payment-info":{"price":{"mode":"fixed","currency":"USD","amount":"0.030000"},"protocols":[{"x402":{}}]},"requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","properties":{"company_name":{"type":"string","description":"Chinese company name or USCI number"},"country":{"type":"string","description":"Country of registration, default CN"}},"required":["company_name"]}}}},"responses":{"200":{"description":"Verification report","content":{"application/json":{"schema":{"type":"object","properties":{"ok":{"type":"boolean"},"risk":{"type":"string","enum":["LOW","MEDIUM","HIGH"]},"signals":{"type":"array","items":{"type":"string"}},"is_factory":{"type":"boolean"}}}}}},"402":{"description":"Payment Required - x402 challenge"}}}},"/landed_cost_calc":{"post":{"operationId":"landedCostCalc","summary":"Calculate true landed cost for China to US/EU imports","tags":["Landed Cost"],"x-payment-info":{"price":{"mode":"fixed","currency":"USD","amount":"0.020000"},"protocols":[{"x402":{}}]},"requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","properties":{"kg":{"type":"number","description":"Weight in kilograms"},"length_cm":{"type":"number"},"width_cm":{"type":"number"},"height_cm":{"type":"number"},"goods_value_usd":{"type":"number"},"shipping_mode":{"type":"string","enum":["air","sea","express"]}},"required":["kg","goods_value_usd","shipping_mode"]}}}},"responses":{"200":{"description":"Landed cost breakdown","content":{"application/json":{"schema":{"type":"object","properties":{"total_landed_cost_usd":{"type":"number"},"freight_usd":{"type":"number"},"customs_usd":{"type":"number"},"breakdown":{"type":"object"}}}}}},"402":{"description":"Payment Required - x402 challenge"}}}},"/payment_red_flags":{"post":{"operationId":"paymentRedFlags","summary":"Screen a supplier payment arrangement for wire-fraud red flags","tags":["Payment Safety"],"x-payment-info":{"price":{"mode":"fixed","currency":"USD","amount":"0.010000"},"protocols":[{"x402":{}}]},"requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","properties":{"payee_name":{"type":"string"},"payee_account":{"type":"string"},"contract_party":{"type":"string"},"deposit_ratio":{"type":"number"}},"required":["payee_name","deposit_ratio"]}}}},"responses":{"200":{"description":"Red flag screening result","content":{"application/json":{"schema":{"type":"object","properties":{"go_no_go":{"type":"string","enum":["GO","NO_GO","CAUTION"]},"flags":{"type":"array","items":{"type":"string"}},"safe_rules":{"type":"array","items":{"type":"string"}}}}}}},"402":{"description":"Payment Required - x402 challenge"}}}},"/audit_checklist":{"post":{"operationId":"auditChecklist","summary":"Generate the 7-point pre-payment China sourcing audit checklist","tags":["Audit"],"x-payment-info":{"price":{"mode":"fixed","currency":"USD","amount":"0.010000"},"protocols":[{"x402":{}}]},"requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","properties":{"company_name":{"type":"string"},"product":{"type":"string"}},"required":["company_name"]}}}},"responses":{"200":{"description":"Audit checklist","content":{"application/json":{"schema":{"type":"object","properties":{"checklist":{"type":"array","items":{"type":"string"}},"priority":{"type":"string"}}}}}},"402":{"description":"Payment Required - x402 challenge"}}}},"/certification_check":{"post":{"operationId":"certificationCheck","summary":"Check required certifications for EU/US import of a product type","tags":["Certification"],"x-payment-info":{"price":{"mode":"fixed","currency":"USD","amount":"0.010000"},"protocols":[{"x402":{}}]},"requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","properties":{"product_type":{"type":"string"},"market":{"type":"string","enum":["EU","US"]}},"required":["product_type","market"]}}}},"responses":{"200":{"description":"Certification requirements","content":{"application/json":{"schema":{"type":"object","properties":{"required_certs":{"type":"array","items":{"type":"string"}},"verification_steps":{"type":"array","items":{"type":"string"}}}}}}},"402":{"description":"Payment Required - 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