Files and e-signing
Connect Signhost to Hypamoon
Yes. Signhost has a public, versioned API and you create the key yourself, so your chat can write the adapter.
OpenThe check
Three questions about the API of Signhost, answered from its own docs.
- Public API docs
- Yes. Public developer docs with an OpenAPI reference. Read the docs
- A key you create yourself
- Yes. Generate both an application key and a user token yourself in the Signhost portal. developer.signhost.com
- Versions or a changelog
- Yes. Versioning through an Accept header (application/json;version=1), an OpenAPI reference and a blog with release and deprecation announcements. developer.signhost.com
- How it signs in
- Two headers: Application with 'APPKey <key>' and Authorization with 'APIKey <user token>'; both are shown once.
- Webhooks
- Yes. It can tell your app when something changes. developer.signhost.com
- Hosting
- Cloud
What you can build
Send a quote or contract for signing from your chat, and store the signed file with the 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
Good to know
- Your adapter uses a fixed key: you paste it once in the Hypamoon portal, never in the chat, and it only goes to the API host you allow.
Try it in your chat
Fill in what to read and write, and send it.
Build the Hypamoon recipe build-an-adapter for Signhost. API docs: https://developer.signhost.com/. 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.signhost.com/
- developer.signhost.com/guide/features/authentication
- developer.signhost.com/llms.txt
Signhost 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 Signhost. Found something that changed? Tell us at support.
More in files and e-signing
- Adobe Acrobat SignOpen
- BoxOpen
- DocuSignPossible
- DropboxOpen
- PandaDocPossible
- SharePoint and OneDriveOpen
- Yousign (Youtrust)Possible
- DocuWareOpen
- Google DriveOpen
- Dropbox SignOpen
- BoldSignOpen
- SignWellOpen
- OneflowOpen
- DocumensoOpen
- signNowOpen
- Zoho SignOpen
- NextcloudOpen
- pCloudPossible
- ScriveOpen
- PenneoOpen
- SkribbleOpen
- M-FilesOpen
- Autodesk Platform ServicesOpen
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 Signhost?
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