USTariffRates

Hosted MCP · Streamable HTTP

Connect tariff workflows to your AI client

Connect with OAuth from a compatible AI client, or use an API key for model APIs and custom integrations. Tool calls inherit your USTariffRates account's plan, credits, billing capability, and provenance rules.

Choose your clientGet an API keyOpenAPI specification

Client setup

https://mcp.ustariffrates.com

In Gemini Enterprise Business, an administrator adds this URL under Connected apps. Gemini discovers USTariffRates OAuth, then opens a consent flow for a signed-in USTariffRates account.

MCP Server URL

https://mcp.ustariffrates.com/mcp

Available workflows

Curated tools instead of one tool per REST endpoint.

search_tariffs

Search US HTS classifications

lookup_tariff

Resolve a source-backed tariff stack

calculate_duty

Calculate supported duties and fees

replay_tariff

Replay a supported historical date

compare_tariff_codes

Compare US, EU, GB, and Brazil classifications

list_tariff_changes

Review monitored changes (Pro+)

audit_entry

Audit customs-entry lines (Team+)

OAuth connection

Compatible clients discover the authorization server from the endpoint. Sign in to USTariffRates, review the requested access, and approve the connection. The client receives a revocable token—not your password or API key.

Security and billing

  • OAuth is preferred for interactive clients; keep API keys in secret storage for code integrations.
  • Start with tool approvals enabled in model APIs.
  • Every tool call is attributed to the approving USTariffRates account.
  • Included and prepaid credits are used first. Postpaid usage requires a separately verified collection capability.
  • Wallet and x402 payments are reserved but not enabled.

Gemini Enterprise administrator checklist

  1. 1. In Gemini Enterprise Business, open Connected apps and add a custom MCP server.
  2. 2. Enter https://mcp.ustariffrates.com/mcp as the MCP Server URL. The transport is Streamable HTTP.
  3. 3. Start authorization. USTariffRates opens in the browser so a signed-in account owner can review and approve the connection.
  4. 4. Standard access uses mcp:read. Entry-audit access additionally uses mcp:audit. mcp:tools remains a legacy compatibility scope for existing grants.
  5. 5. After consent, confirm Gemini can list the standard tariff tools. The audit_entry tool appears only when entry-audit access is approved and the account plan permits it.

Gemini Enterprise custom MCP connections are currently a Pre-GA Google feature with limited support. Availability and administrator labels may change on Google's side.

Need raw endpoint details? Review the complete API reference.

Frequently asked questions