Logistics and transport
Connect HMRC Customs Declarations API to Hypamoon
Possible, with help from HMRC Customs Declarations API. The API is documented, but you cannot just create a key: access goes through HMRC Customs Declarations API first.
PossibleThe check
Three questions about the API of HMRC Customs Declarations API, answered from its own docs.
- Public API docs
- Yes. Read the docs
- A key you create yourself
- No. Sandbox credentials are self-service; production credentials need an application that HMRC reviews in up to 10 working days. developer.service.hmrc.gov.uk
- Versions or a changelog
- Yes. Versioned API; a backwards incompatible change raises the version number. developer.service.hmrc.gov.uk
- How it signs in
- OAuth 2.0 user restricted access with the Government Gateway login of the trader; sandbox test users are created through an API.
- Webhooks
- Not confirmed.
- Hosting
- Cloud
- Condition
- Production access needs approval from HMRC.
What you can build
Submit customs declarations for your UK imports and exports from your own order system, once HMRC has approved your production application.
Your chat writes it as a Hypamoon adapter from the docs above. Reading starts after you click Allow in the portal, and every write waits for your approval, one call at a time. How adapters work
Good to know
- HMRC Customs Declarations API signs in with OAuth or signed requests only, with tokens that expire. The Hypamoon vault holds a fixed key today, so an adapter for HMRC Customs Declarations API takes more work: ask your chat to check this first.
- Version 1.0 is available in production; version 2.0 is in beta in the sandbox only.
Try it in your chat
First get access from HMRC Customs Declarations API. Then fill in what to read and write, and send it.
Build the Hypamoon recipe build-an-adapter for HMRC Customs Declarations API. API docs: https://developer.service.hmrc.gov.uk/api-documentation/docs/api/service/customs-declarations/2.0. Read: [what]. Write: [what, or nothing].
In Claude, or another chat with the full Hypamoon connection; adapters are not in ChatGPT yet. You paste the key in the portal, never in the chat. The full recipe
Sources
Checked on 7 November 2026.
- developer.service.hmrc.gov.uk/api-documentation/docs/api/service/customs-declarations/2.0
- developer.service.hmrc.gov.uk/api-documentation/docs/using-the-hub
HMRC Customs Declarations API is a name of its owner, used here only to describe the software. This page is not an official integration and Hypamoon has no partnership with HMRC Customs Declarations API. Found something that changed? Tell us at support.
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Tool not listed? Ask the chat to check its API.
The same three checks work for any software. Your chat reads the vendor's own docs and tells you what it found.
Check if [software] has an open API that a Hypamoon adapter can use: public API docs, a key or token I can create myself without asking the vendor, and versions or a changelog. Link the pages you used.
Fill in the name of your software. Checking needs no connection to Hypamoon.
Ready to connect HMRC Customs Declarations API?
Connect your chat once, then ask it to build the adapter.
Works in Claude, ChatGPT and Copilot. Add to Claude Add to ChatGPT 
Add to Copilot