--- title: "Mooncard API: connect it to your AI chat ยท Hypamoon" description: "The Mooncard API is documented, but access goes through Mooncard first. What it takes to connect it to your AI chat with Hypamoon, with sources." url: https://hypamoon.com/connect-to/mooncard --- 1. [Connect to](https://hypamoon.com/connect-to) 2. Mooncard ERP and accounting # Connect Mooncard to Hypamoon Possible, with help from Mooncard. The API is documented, but you cannot just create a key: access goes through Mooncard first. Possible ## The check Three questions about the API of Mooncard, answered from its own docs. **Public API docs**\ **Yes.** [Read the docs](https://developers.mooncard.co/docs) **A key you create yourself**\ **No.** Sandbox credentials work at once, but Mooncard reviews every production credential before it can reach real data. [developers.mooncard.co](https://developers.mooncard.co/docs) **Versions or a changelog**\ **Yes.** Versioned API (v3 in the path). [developers.mooncard.co](https://developers.mooncard.co/docs) **How it signs in**\ OAuth 2 credentials from the Mooncard developer portal, with authorization code or password flow; tokens last two hours. **Webhooks**\ **Yes.** It can tell your app when something changes. [developers.mooncard.co](https://developers.mooncard.co/docs) **Hosting**\ Cloud **Condition**\ Mooncard reviews each production credential before it can read real company data. ## Your own expense overview on Mooncard, once your credential is approved. - Expenses, cards and receipts, from the scopes Mooncard approves. - AI that checks each expense and proposes the category, with a person approving. - A screen for team leads and an email when receipts are missing. ### Ask your chat Answers straight from your Mooncard data, in Claude or another chat with the full Hypamoon connection. - Which expenses from this month have no receipt yet? - Which cards had the highest spend last week? ### When something happens Mooncard sends a webhook to your app, and the app asks AI what happens next. 1. When An expense is created or updated in Mooncard. AI decides AI checks amount, VAT and category against your rules. Then Finance gets an email when something needs a look. ### A screen for your team or customers An app on your own address, with sign-in, on top of the same Mooncard data. - For your team Team leads see their team's expenses and missing receipts per month. Mooncard 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 Mooncard waits for your approval, one call at a time. [How adapters work](https://hypamoon.com/docs/adapters) ### Good to know - Mooncard signs in with OAuth or signed requests only, with tokens that expire. The Hypamoon vault holds a fixed key today, so an adapter for Mooncard takes more work: ask your chat to check this first. - Anyone can open a developer account and a sandbox; production scopes and usage context cannot be changed after creation. Webhooks cover expense create, update and delete. ## Try it in your chat First get access from Mooncard. Then fill in what to read and write, and send it. Say this in your chat > Build the Hypamoon recipe build-an-adapter for Mooncard. API docs: https://developers.mooncard.co/docs. Read: \[what\]. Write: \[what, or nothing\]. [Open in Claude](https://claude.ai/new?q=Build%20the%20Hypamoon%20recipe%20build-an-adapter%20for%20Mooncard.%20API%20docs%3A%20https%3A%2F%2Fdevelopers.mooncard.co%2Fdocs.%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.mooncard.co/docs](https://developers.mooncard.co/docs) Mooncard 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 Mooncard. 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 Mooncard? 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=mooncard) Works in Claude, ChatGPT and Copilot. [Add to Claude](https://hypamoon.com/connect?via=connect-to~mooncard#claude) [Add to ChatGPT](https://hypamoon.com/connect?via=connect-to~mooncard#chatgpt) [Add to Copilot](https://hypamoon.com/docs/microsoft-copilot)