{"activeVersionTag":"latest","latestAvailableVersionTag":"latest","collection":{"info":{"_postman_id":"c4a05cbb-d988-4a0b-be0d-644e11332138","name":"CBP Duty Calculation API","description":"# CBP Duty Calculation API\n\n## Overview\n\nREST API for calculating US Customs and Border Protection (CBP) duties against the Harmonized Tariff Schedule of the United States (HTSUS).\n\nThe authentication flow is OAuth 2.0 client-credentials. All requests require `Authorization: Bearer` .\n\nThree endpoints are exposed under `/api/v1`. See each operation's own description for its request/response contract and validation behavior.\n\n## HTS code inputs\n\nDuties are calculated at the full **10-digit** statistical-suffix level. Every HTS code submitted as input — the calculation item's code, its component codes, and the lookup endpoint's code — must be a full 10-digit code, dotted (`6201.40.50.11`) or plain (`6201405011`). The single exception: an 8-digit tariff line is accepted for **component-rated classifications** (e.g. watches, `9101.11.40`), where the statistical suffixes identify the article's components rather than the article itself. A broader code is rejected with `V_TenDigitHtsCodeRequired`.\n\n## Authentication\n\nOAuth 2.0 client-credentials flow. Token endpoint:\n\n- Sandbox: `https://auth.dutycollection-sandbox.safepackage.com/realms/SafePackage/protocol/openid-connect/token`\n    \n\nSubmit the resulting JWT as `Authorization: Bearer` on each request.\n\n## Errors\n\nAll `400 Bad Request` responses follow the shape `{ \"errors\": [{ \"fieldName\", \"rejectedValue\", \"code\", \"message\" }] }`. Codes are stable and prefixed `V_` for validation failures (e.g. `V_InvalidHtsCode`, `V_HtsCodeNotFound`, `V_TenDigitHtsCodeRequired`, `V_DeclaredValueRequired`, `V_QuantityRequired`, `V_MutuallyExclusiveProperties`, `V_MissingRequiredComponents`, `V_AluminumSmeltDataRequired`, `V_SteelMeltAndPourDataRequired`, `V_CountryNotFound`). `404 Not Found` is returned without a body for HTS lookups against unknown codes. `401 Unauthorized` is returned when the bearer token is missing or invalid, and `403 Forbidden` when the caller is not permitted to access the resource.\n\n## Support\n\n- API access provisioning: `api-access@safepackage.com`\n    \n- Technical support: 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