Shops and shipping
Connect USPS to Hypamoon
Yes, with one catch. USPS has an open API that you can use yourself, but it signs in with OAuth only, and that takes more work in a Hypamoon adapter today.
OpenThe check
Three questions about the API of USPS, answered from its own docs.
- Public API docs
- Yes. Read the docs
- A key you create yourself
- Yes. Create an app under My Apps in the Customer Onboarding Portal and copy the consumer key and secret. Label APIs need extra approval and payment set up. developers.usps.com
- Versions or a changelog
- Yes. Versioned APIs (version 3) with announced retirement dates for older versions. developers.usps.com
- How it signs in
- Consumer key and secret exchanged for an OAuth token, sent as Bearer.
- Webhooks
- Yes. It can tell your app when something changes. developers.usps.com
- Hosting
- Cloud
- Condition
- Needs a USPS business account; labels also need USPS Ship enrollment and an Enterprise Payment Account or a permit.
What you can build
Check addresses, prices and tracking from your own system, and get tracking events pushed to your server through a subscription.
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
- USPS signs in with OAuth or signed requests only, with tokens that expire. The Hypamoon vault holds a fixed key today, so an adapter for USPS takes more work: ask your chat to check this first.
- The default product has a quota of 60 calls per hour per API; higher quotas and other APIs go through a service request.
Try it in your chat
Fill in what to read and write, and send it.
Build the Hypamoon recipe build-an-adapter for USPS. API docs: https://developers.usps.com/getting-started. 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.
- developers.usps.com/getting-started
- developers.usps.com/industry-alert-api-retirement
- developers.usps.com/subscriptions-trackingv3
USPS 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 USPS. 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 USPS?
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