--- title: "PlentyONE API: connect it to your AI chat ยท Hypamoon" description: "The PlentyONE API is open, signs in with OAuth and sends webhooks. What your AI chat can build with it on Hypamoon, how it connects, and the sources we checked." url: https://hypamoon.com/connect-to/plentyone --- 1. [Connect to](https://hypamoon.com/connect-to) 2. PlentyONE ERP and accounting # Connect PlentyONE to Hypamoon Yes, with one catch. PlentyONE 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. Open ## The check Three questions about the API of PlentyONE, answered from its own docs. **Public API docs**\ **Yes.** Public developer portal with REST API guides and reference. [Read the docs](https://developers.plentyone.com/en-gb/developers/main/rest-api-guides/getting-started.html) **A key you create yourself**\ **Yes.** You log in with a back end user of your own system through /rest/login and get an access token; the REST API needs the Expand contract or higher. [developers.plentyone.com](https://developers.plentyone.com/en-gb/developers/main/rest-api-guides/getting-started.html) **Versions or a changelog**\ **Yes.** You can pin an API version with a versioned media type in the Accept header. [developers.plentyone.com](https://developers.plentyone.com/en-gb/developers/main/rest-api-guides/getting-started.html) **How it signs in**\ POST a back end username and password to /rest/login and send the returned access token as a bearer token; the token expires after 24 hours and comes with a refresh token. **Webhooks**\ **Yes.** It can tell your app when something changes. [developers.plentyone.com](https://developers.plentyone.com/en-gb/developers/main/rest-api-guides/webhook_subscriptions.html) **Hosting**\ Cloud **Condition**\ REST API access needs the Expand contract or higher; Lite and Lite+ do not include it. ## In practice What it takes in a real PlentyONE administration. **Getting access**\ Create a back end user with the REST API rights the integration needs; the adapter logs in with that user at /rest/login. **Limits**\ On Expand and Scale: 200 read calls per user per minute and 166,000 per system per day; 80 write calls per user per minute and 48,000 per system per day. Some routes have their own limits. [developers.plentyone.com](https://developers.plentyone.com/en-gb/developers/main/rest-api-guides/getting-started.html) **Writing**\ **Read and write.** Write calls are part of the REST API, within the rights of the back end user and the write limits. **Cost**\ Needs the Expand contract or higher. [developers.plentyone.com](https://developers.plentyone.com/en-gb/developers/main/rest-api-guides/getting-started.html) ## Your own B2B portal on PlentyONE, next to the shops and marketplaces you already run. - Orders, items, stock and contacts from PlentyONE. - AI that checks new orders and spots items about to run out. - A portal for your business customers and an email when something needs a look. ### Ask your chat Answers straight from your PlentyONE data, in Claude or another chat with the full Hypamoon connection. - Which orders from last week still have no shipping label? - Which items sell well but have less than two weeks of stock? ### When something happens PlentyONE sends a webhook to your app, and the app asks AI what happens next. 1. When A subscribed event in PlentyONE, such as a new order. AI decides AI checks the order for an odd address, price or quantity. Then The team gets an email when an order needs a look. ### A screen for your team or customers An app on your own address, with sign-in, on top of the same PlentyONE data. - For your customers Business customers sign in, see their own prices and order history, and reorder. ### Add Hypamoon Text messages, email, phone, payments and agents run in the same project as the adapter. - Agent on a schedule Every Monday, an agent emails you the items to reorder. PlentyONE stays the core: your chat builds the rest on its API, as an adapter plus an app and agents in your Hypamoon project. Reading starts after you click Allow in the portal. Every change an agent or a chat makes in PlentyONE waits for your approval, one call at a time. [How adapters work](https://hypamoon.com/docs/adapters) ### Good to know - PlentyONE signs in with OAuth or signed requests only, with tokens that expire. The Hypamoon vault holds a fixed key today, so an adapter for PlentyONE takes more work: ask your chat to check this first. - Tokens expire after 24 hours, so an adapter has to log in again or refresh. The number of concurrent sessions is limited, 3 by default. ## Try it in your chat Fill in what to read and write, and send it. Say this in your chat > Build the Hypamoon recipe build-an-adapter for PlentyONE. API docs: https://developers.plentyone.com/en-gb/developers/main/rest-api-guides/getting-started.html. Read: \[what\]. Write: \[what, or nothing\]. [Open in Claude](https://claude.ai/new?q=Build%20the%20Hypamoon%20recipe%20build-an-adapter%20for%20PlentyONE.%20API%20docs%3A%20https%3A%2F%2Fdevelopers.plentyone.com%2Fen-gb%2Fdevelopers%2Fmain%2Frest-api-guides%2Fgetting-started.html.%20Read%3A%20%5Bwhat%5D.%20Write%3A%20%5Bwhat%2C%20or%20nothing%5D.) 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](https://hypamoon.com/r/build-an-adapter) ## Sources Checked on 7 November 2026. - [developers.plentyone.com/en-gb/developers/main/rest-api-guides/getting-started.html](https://developers.plentyone.com/en-gb/developers/main/rest-api-guides/getting-started.html) - [developers.plentyone.com/en-gb/developers/main/rest-api-guides/webhook\_subscriptions.html](https://developers.plentyone.com/en-gb/developers/main/rest-api-guides/webhook_subscriptions.html) PlentyONE 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 PlentyONE. Found something that changed? 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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. Say this in your chat > 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. [Open in Claude](https://claude.ai/new?q=Check%20if%20%5Bsoftware%5D%20has%20an%20open%20API%20that%20a%20Hypamoon%20adapter%20can%20use%3A%20public%20API%20docs%2C%20a%20key%20or%20token%20I%20can%20create%20myself%20without%20asking%20the%20vendor%2C%20and%20versions%20or%20a%20changelog.%20Link%20the%20pages%20you%20used.) [Open in ChatGPT](https://chatgpt.com/?q=Check%20if%20%5Bsoftware%5D%20has%20an%20open%20API%20that%20a%20Hypamoon%20adapter%20can%20use%3A%20public%20API%20docs%2C%20a%20key%20or%20token%20I%20can%20create%20myself%20without%20asking%20the%20vendor%2C%20and%20versions%20or%20a%20changelog.%20Link%20the%20pages%20you%20used.) Fill in the name of your software. Checking needs no connection to Hypamoon. ## Ready to connect PlentyONE? Connect your chat once, then ask it to build the adapter. [Start free](https://app.hypamoon.com/?mode=signup&utm_source=connect-to&utm_campaign=plentyone) Works in Claude, ChatGPT and Copilot. [Add to Claude](https://hypamoon.com/connect?via=connect-to~plentyone#claude) [Add to ChatGPT](https://hypamoon.com/connect?via=connect-to~plentyone#chatgpt) [Add to Copilot](https://hypamoon.com/docs/microsoft-copilot)