> ## Documentation Index > Fetch the complete documentation index at: https://www.worldmonitor.app/docs/llms.txt > Use this file to discover all available pages before exploring further. # GetUsImportDuty > Current US duty on one product from one country (USITC HTS). PRO-gated. Requires entitlement tier >= 1. ## OpenAPI ````yaml /api/TradeService.openapi.yaml get /api/trade/v1/get-us-import-duty openapi: 3.1.0 info: title: TradeService API version: 1.0.0 servers: - url: https://api.worldmonitor.app security: - WorldMonitorKey: [] - ApiKeyHeader: [] paths: /api/trade/v1/get-us-import-duty: get: tags: - TradeService summary: GetUsImportDuty description: >- Current US duty on one product from one country (USITC HTS). PRO-gated. Requires entitlement tier >= 1. operationId: GetUsImportDuty parameters: - name: hs_code in: query description: 'HTS code: 6, 8 or 10 digits, no dots ("870323").' required: true example: '870380' schema: type: string pattern: ^[0-9]{6}([0-9]{2}){0,2}$ - name: partner_country in: query description: Exporter, 3-digit UN M49 ("156"). required: true example: '156' schema: type: string pattern: ^[0-9]{3}$ - name: jmespath in: query description: >- Optional JMESPath expression applied server-side to project or reduce the JSON response before it is returned (mirrors the MCP jmespath argument). Invalid expressions, expressions larger than 1024 UTF-8 bytes, or projections that exceed the 256 KB output cap return HTTP 400 with a {_jmespath_error, original_keys} envelope. Grammar and worked examples: https://www.worldmonitor.app/docs/mcp-jmespath. required: false example: keys(@) schema: type: string responses: '200': description: Successful response content: application/json: example: additionalDutiesLoaded: true hsCode: '870380' htsRelease: 2026HTSRev21 lines: - additionalDuties: - addedRate: 100 authority: US_DUTY_AUTHORITY_SECTION_301 condition: '' effectiveFrom: '2024-09-27' heading: 9903.91.03 legalNote: U.S. note 31(d) program: China four-year review status: US_ADDITIONAL_DUTY_STATUS_APPLIES topUpTo: 0 - addedRate: 25 authority: US_DUTY_AUTHORITY_SECTION_232 condition: >- Section 232 rates vary by origin deal and, for some derivatives, apply to metal content only. effectiveFrom: '' heading: 9903.94.01 legalNote: U.S. note 33(b) program: Passenger vehicles and light trucks status: US_ADDITIONAL_DUTY_STATUS_CONDITIONAL topUpTo: 0 baseAdValorem: 2.5 baseNonAdValorem: false baseRate: 2.5% basis: US_DUTY_BASIS_MFN column2Rate: 10% description: Other vehicles, with only electric motors for propulsion estimateComplete: false estimatedRate: 102.5 generalRate: 2.5% htsCode: 8703.80.00 preferenceProgram: '' specialRate: Free (A+,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) unresolvedPrograms: - D - E partnerCountry: '156' source: USITC Harmonized Tariff Schedule sourceUrl: https://hts.usitc.gov/search?query=8703.80 upstreamUnavailable: false schema: $ref: '#/components/schemas/GetUsImportDutyResponse' '400': description: Validation error content: application/json: schema: oneOf: - $ref: '#/components/schemas/ValidationError' - $ref: '#/components/schemas/JmespathProjectionError' '401': description: Missing or invalid API key. content: application/json: schema: $ref: '#/components/schemas/UnauthorizedError' '403': description: PRO entitlement access denied. headers: X-Billing-Verification: description: >- Present when the 403 is a billing-provider-confirmed subscription lapse (value subscription_lapsed, matching the body `code`). schema: type: string content: application/json: schema: $ref: '#/components/schemas/ForbiddenError' '429': description: Rate limit exceeded. headers: X-RateLimit-Limit: description: Maximum requests allowed in the active rate-limit window. schema: type: string X-RateLimit-Remaining: description: Requests remaining in the active rate-limit window. schema: type: string X-RateLimit-Reset: description: >- Unix epoch milliseconds when the active rate-limit window resets. schema: type: string Retry-After: description: Seconds to wait before retrying the request. schema: type: string content: application/json: schema: oneOf: - $ref: '#/components/schemas/Error' - $ref: '#/components/schemas/RateLimitError' '503': description: >- Service unavailable. Billing-verification responses include code and X-Billing-Verification; other gateway infrastructure failures use the generic GatewayError shape. headers: Retry-After: description: Seconds to wait before retrying (1-60). schema: type: string X-Billing-Verification: description: >- Billing-verification state that produced this response (matches the body `code`). schema: type: string X-Validation-Mode: description: >- Present with value degraded when user API-key validation is temporarily unavailable. schema: type: string X-RateLimit-Mode: description: >- Present with value degraded when a fail-closed rate-limit dependency is unavailable. schema: type: string content: application/json: schema: oneOf: - $ref: '#/components/schemas/BillingVerificationError' - $ref: '#/components/schemas/GatewayError' default: description: Gateway or handler error response. content: application/json: schema: oneOf: - $ref: '#/components/schemas/Error' - $ref: '#/components/schemas/GatewayError' security: - WorldMonitorKey: [] - ApiKeyHeader: [] - BearerAuth: [] components: schemas: GetUsImportDutyResponse: type: object properties: hsCode: type: string description: HTS code, as requested. partnerCountry: type: string description: Exporter code, as requested. htsRelease: type: string description: HTS release of the chapter 99 index ("2026HTSRev21"). lines: type: array items: $ref: '#/components/schemas/UsTariffLine' additionalDutiesLoaded: type: boolean description: False when the chapter 99 index was unavailable. source: type: string description: Data source. sourceUrl: type: string description: HTS search page for the code. upstreamUnavailable: type: boolean description: True on a fault, false on a coverage answer. unavailableReason: type: string enum: - US_IMPORT_DUTY_UNAVAILABLE_REASON_UNSPECIFIED - US_IMPORT_DUTY_UNAVAILABLE_REASON_INVALID_REQUEST - US_IMPORT_DUTY_UNAVAILABLE_REASON_NOT_COVERED - US_IMPORT_DUTY_UNAVAILABLE_REASON_UPSTREAM_UNAVAILABLE description: >- Why no line was served. NOT_COVERED is final; UPSTREAM_UNAVAILABLE is a fault. description: Current US duty on a product from one country. ValidationError: type: object properties: violations: type: array items: $ref: '#/components/schemas/FieldViolation' description: List of validation violations required: - violations description: >- ValidationError is returned when request validation fails. It contains a list of field violations describing what went wrong. JmespathProjectionError: description: >- Returned when a REST jmespath projection is invalid or exceeds the expression/output byte limits. properties: _jmespath_error: description: Projection error discriminator and details. type: string original_keys: description: Top-level keys or shape of the unprojected response. items: type: string type: array required: - _jmespath_error - original_keys type: object UnauthorizedError: type: object properties: error: type: string description: Human-readable error message. required: - error description: >- Returned when the API key is missing, malformed, or lacks current API access. ForbiddenError: type: object properties: error: type: string description: Human-readable entitlement failure reason. code: type: string enum: - subscription_lapsed description: >- Machine-readable denial code, present when the 403 is a billing-provider-confirmed subscription lapse (mirrored in the X-Billing-Verification response header). requiredTier: type: integer format: int32 description: Minimum entitlement tier required for this endpoint. currentTier: type: integer format: int32 description: Caller entitlement tier when known. planKey: type: string description: Caller plan key when known. required: - error description: >- Returned when a PRO-gated endpoint denies access because the caller has no resolved authenticated user, entitlements cannot be verified, or the caller lacks the required entitlement tier. Error: type: object properties: message: type: string description: Error message (e.g., 'user not found', 'database connection failed') description: >- Error is returned when a handler encounters an error. It contains a simple error message that the developer can customize. RateLimitError: type: object description: Returned when a gateway or handler rate limit rejects the request. properties: error: type: string description: Human-readable rate-limit failure reason. required: - error BillingVerificationError: type: object description: >- Returned with HTTP 503 when paid access cannot be confirmed right now: the billing provider is re-verifying a recently expired subscription, or the entitlement backend is unreachable. Retryable — honor Retry-After. properties: error: type: string description: Human-readable billing-verification failure reason. code: type: string enum: - renewal_verification_pending - renewal_verification_failed - entitlement_verification_unavailable description: >- Machine-readable billing-verification state, mirrored in the X-Billing-Verification response header. requiredTier: type: integer format: int32 description: >- Minimum entitlement tier required for this endpoint, when the denial came from a tier gate. required: - error - code GatewayError: type: object description: >- Returned by gateway infrastructure errors before an RPC handler runs, such as origin, routing, method, authentication, or quota checks. properties: error: oneOf: - type: string - type: object additionalProperties: true description: Gateway error reason or structured gateway failure details. required: - error UsTariffLine: type: object properties: htsCode: type: string description: 8-digit HTS line ("8703.23.01"). description: type: string description: Article description. generalRate: type: string description: Column 1 General. specialRate: type: string description: Column 1 Special, with program codes. column2Rate: type: string description: Column 2. basis: type: string enum: - US_DUTY_BASIS_UNSPECIFIED - US_DUTY_BASIS_MFN - US_DUTY_BASIS_PREFERENTIAL - US_DUTY_BASIS_COLUMN_2 description: Column the base rate comes from. baseRate: type: string description: Base rate text. baseAdValorem: type: number format: double description: Base rate in percent; 0 when not ad valorem. baseNonAdValorem: type: boolean description: True when the base rate is specific or compound. preferenceProgram: type: string description: Special program applied ("S" = USMCA). unresolvedPrograms: type: array items: type: string description: Special programs whose partner eligibility is not resolved. additionalDuties: type: array items: $ref: '#/components/schemas/UsAdditionalDuty' estimatedRate: type: number format: double description: Base plus APPLIES duties, in percent. estimateComplete: type: boolean description: >- False when the base is not ad valorem or a duty is not APPLIES/EXEMPT. description: One 8-digit HTS line. FieldViolation: type: object properties: field: type: string description: >- The field path that failed validation (e.g., 'user.email' for nested fields). For header validation, this will be the header name (e.g., 'X-API-Key') description: type: string description: >- Human-readable description of the validation violation (e.g., 'must be a valid email address', 'required field missing') required: - field - description description: FieldViolation describes a single validation error for a specific field. UsAdditionalDuty: type: object properties: heading: type: string description: Chapter 99 heading ("9903.88.03"). authority: type: string enum: - US_DUTY_AUTHORITY_UNSPECIFIED - US_DUTY_AUTHORITY_SECTION_301 - US_DUTY_AUTHORITY_SECTION_232 - US_DUTY_AUTHORITY_COLUMN_2 description: Legal authority of a chapter 99 duty. program: type: string description: Action name ("China List 3"). addedRate: type: number format: double description: Percentage points added to the base rate. topUpTo: type: number format: double description: Combined rate the base is raised to; 0 when none. status: type: string enum: - US_ADDITIONAL_DUTY_STATUS_UNSPECIFIED - US_ADDITIONAL_DUTY_STATUS_APPLIES - US_ADDITIONAL_DUTY_STATUS_CONDITIONAL - US_ADDITIONAL_DUTY_STATUS_EXEMPT - US_ADDITIONAL_DUTY_STATUS_SCHEDULED description: Whether a chapter 99 duty applies to this line and partner. condition: type: string description: What decides the status. legalNote: type: string description: Chapter 99 U.S. note listing the products. effectiveFrom: type: string description: First day in force, when dated. description: A chapter 99 duty on one line. securitySchemes: WorldMonitorKey: type: apiKey in: header name: X-WorldMonitor-Key description: User-issued WorldMonitor API key. ApiKeyHeader: type: apiKey in: header name: X-Api-Key description: Alias header for the WorldMonitor API key (X-WorldMonitor-Key). BearerAuth: type: http scheme: bearer description: >- Bearer token: a Clerk-issued JWT for browser session flows, passed as Authorization: Bearer . ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.