--- title: "Asperion API: connect it to your AI chat ยท Hypamoon" description: "The Asperion API is documented, but access goes through Asperion first. What it takes to connect it to your AI chat with Hypamoon, with sources." url: https://hypamoon.com/connect-to/asperion --- 1. [Connect to](https://hypamoon.com/connect-to) 2. Asperion ERP and accounting # Connect Asperion to Hypamoon Possible, with help from Asperion. The API is documented, but you cannot just create a key: access goes through Asperion first. Possible ## The check Three questions about the API of Asperion, answered from its own docs. **Public API docs**\ **Yes.** REST API reference with Swagger for production and sandbox. [Read the docs](https://help.asperion.nl/api/) **A key you create yourself**\ **No.** The API is offered to external software suppliers; you sign up as an API partner and Asperion issues the client ID and secret plus a sandbox account. [asperion.nl](https://www.asperion.nl/kenniscentrum/api/) **Versions or a changelog**\ **Yes.** Versioned paths such as /v1/ and a separate sandbox environment. [help.asperion.nl](https://help.asperion.nl/api/) **How it signs in**\ OAuth 2.0 authorization code flow with a client ID and secret from Asperion; access tokens last an hour, refresh tokens are single use, and an X-Tenant-Id header picks the administration. **Webhooks**\ **Not confirmed.** **Hosting**\ Cloud **Condition**\ Client ID and secret come through the Asperion API partner sign-up. ## In practice What it takes in a real Asperion administration. **Getting access**\ Sign up as an Asperion API partner, get a client ID and secret and a sandbox account, then let the customer authorise the app once. **Limits**\ None published. **Writing**\ **Read and write.** Create, replace, patch and delete objects through POST, PUT, PATCH and DELETE, with field level validation errors. **Cost**\ Not published. ## What you can build Post daily revenue and sales invoices from your own till or order tool into Asperion and ask your chat for open items per customer. 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](https://hypamoon.com/docs/adapters) ### Good to know - Asperion signs in with OAuth or signed requests only, with tokens that expire. The Hypamoon vault holds a fixed key today, so an adapter for Asperion takes more work: ask your chat to check this first. ## Try it in your chat First get access from Asperion. Then fill in what to read and write, and send it. Say this in your chat > Build the Hypamoon recipe build-an-adapter for Asperion. API docs: https://help.asperion.nl/api/. Read: \[what\]. Write: \[what, or nothing\]. [Open in Claude](https://claude.ai/new?q=Build%20the%20Hypamoon%20recipe%20build-an-adapter%20for%20Asperion.%20API%20docs%3A%20https%3A%2F%2Fhelp.asperion.nl%2Fapi%2F.%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. - [help.asperion.nl/api/](https://help.asperion.nl/api/) - [www.asperion.nl/kenniscentrum/api/](https://www.asperion.nl/kenniscentrum/api/) Asperion 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 Asperion. 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 Asperion? 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=asperion) Works in Claude, ChatGPT and Copilot. [Add to Claude](https://hypamoon.com/connect?via=connect-to~asperion#claude) [Add to ChatGPT](https://hypamoon.com/connect?via=connect-to~asperion#chatgpt) [Add to Copilot](https://hypamoon.com/docs/microsoft-copilot)