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Trade Tariff API documentation

Developer Portal

The Developer Portal allows you to:

  • access official trade tariff data from HMRC
  • create and manage your API keys
  • explore, test and integrate tariff data directly from HMRC
  • manage organisational details
  • invite new members and remove existing members

At present, API key management is available for the Trade Tariff API and FPO API. Categorisation API keys will be added in a future phase.

Sign up to the Trade Tariff API Developer Portal (opens in new tab)

Why sign up to the Developer Portal?

From September 2026, rate limiting will apply to the Trade Tariff API. Rate limiting sets a cap on the number of requests you can make per minute.

Registering on the Developer Portal gives you access to a higher request rate than unauthenticated access.

By registering on the Developer Portal, you can access a higher rate limit of 750 requests per minute.

Unauthenticated access has a lower rate limit than authenticated access.

Managed service host change: Trade Tariff keys issued through the Developer Portal are used against api.trade-tariff.service.gov.uk. If you are migrating from www.trade-tariff.service.gov.uk, update the base URL in your integration. See Authenticating with managed credentials for details.

Who can use the Developer Portal?

Anyone who needs access to UK Trade Tariff data, including:

  • software developers building customs or logistics integrations
  • product managers overseeing compliance systems
  • trade and customs specialists seeking accurate, up-to-date information

Whether you are a large enterprise or an independent trader, the APIs provide consistent and authoritative data from HMRC’s Online Trade Tariff.

How can I register on the Developer Portal?

Signing up to the Trade Tariff Developer Portal and accessing a higher rate limit could not be easier.

You will need to verify your email address using a secure one-time link, as the Developer Portal uses passwordless sign-in.

Once verified, you will be able to create and manage API keys, update organisational details and invite others from your organisation.

Get help from HMRC

If you have any questions or require help, please use the Trade Tariff enquiry form (opens in new tab).