Claude Lumin desktop extensionWhat this Lumin extension can do in your account from Claude Desktop.
This Claude Lumin connector is a desktop extension with 7 tools. 3 read your profile, workspaces and signature requests, 4 upload files, build PDFs, send or cancel requests, and none is left undescribed. Lumin also lists a remote connector with 14 tools, templates included.
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Why install this Lumin extension
The directory carries two Lumin entries from the same publisher. This one installs in Claude Desktop and keeps to the basics of a signature request: get a file in, send it, check where it stands, cancel it if needed. Lumin pitches it at developers building document workflows. The other entry, a remote connector, adds templates and agreements.
A contract drafted in the chat, then sent. lumin_markdown2pdf turns Markdown into a PDF, and send_signature_request_on_lumin sends it for signature from the file. For a freelance developer, that is a one-page contract out of the door without opening another app.
A quick status check. get_signature_request_on_lumin_by_id returns a request's status, signers and expiry, so you know who is still missing before the deadline.
A stop button. cancel_signature_request_on_lumin_by_id cancels an active request, and Lumin warns that this cannot be undone.
What it does not do: none of its 7 tools lists or fills templates, generates AgreementGen agreements or downloads the signed file; those live in Lumin's remote connector. It only runs in Claude Desktop, and it never acts on its own when a signer finishes. For background follow-up, see the Lumin Make integration, which runs without anyone in the chat.
Five words before you install
The terms that matter for this extension, explained once.
- Connector
- The link you set up once between Claude and an account you already have, so Claude can work in it while it answers you.
- Desktop extension
- A connector installed and run on your own computer, inside Claude Desktop, rather than one hosted online and used from any Claude app.
- Tool
- One named action a connector hands to Claude. Claude decides which ones to call as it answers, and the directory sheet lists them all.
- Approval
- The confirmation Claude waits for before it changes something in your account, shown in the conversation when it matters.
- MCP
- The open standard connectors are built on: it is what lets an assistant such as Claude talk to an outside service like Lumin.
Install the Claude Lumin extension in three steps
- 01
Find the desktop entry
In Claude Desktop, open Customize, then Connectors, and pick the Lumin entry marked for Claude Desktop, not the remote connector. On a Team or Enterprise workspace, an Owner or Primary Owner must allow it first.
- 02
Start the installation
Launch it from its line. Lumin's service then asks you to sign in to the Lumin account whose documents Claude will handle; the extension needs one to do anything.
- 03
Check what the access covers
Read the permission screen Lumin shows before you accept. It is Lumin's screen, not Claude's, and it sets what Claude can reach. To remove the link later, use Disconnect.
The 7 tools of the Lumin desktop extension
Lumin gives Claude 7 tools: 3 that read your account, 4 that change something in it.
Six of these tools share their name with one Lumin documents for its remote server; the seventh is covered by the directory description. Names stay as Claude shows them.
- 3 read
- 4 write
What Claude reads (3)
3 toolsYour profile, the workspaces you belong to and the status of a signature request.
get_lumin_user_information
Returns the profile of the signed-in Lumin user, with ID, name and email address. Claude uses it to confirm whose account the extension talks to.
get_signature_request_on_lumin_by_id
Retrieves a signature request by its ID, including status, signers and expiration date.
get_workspace_list_of_user_on_lumin
Lists the Lumin workspaces you belong to. Only the directory description covers this tool, as browsing workspaces; Lumin's documentation does not mention it.
What Claude uploads, sends or cancels (4)
4 toolsUploads, PDFs built from Markdown, signature requests sent or cancelled. No source describes a confirmation for these tools: the general rule below applies.
cancel_signature_request_on_lumin_by_id
Approval: see the ruleCancels an active signature request, which Lumin describes as irreversible.
send_signature_request_on_lumin
Approval: see the ruleCreates and sends a new signature request from a file address.
upload_file_to_lumin
Approval: see the rulePuts a document into your Lumin workspace from a file address.
lumin_markdown2pdf
Approval: see the ruleConverts Markdown into a downloadable PDF and returns a link that other tools can use, such as the one that sends for signature.
What Claude checks with you first
By default, Claude stops and asks before each action it carries out on an account for someone, right in the conversation.
No source describes a confirmation specific to the four tools of this extension that upload, create, send or cancel, so that default rule is what applies to them. On Team and Enterprise, workspace owners decide whether members may let some actions through without being asked every time, and they can limit a connector for the whole organization, for example keeping reads and closing writes. Nobody lifts that from their own account. Claude also works with the rights of the Lumin account you signed in with, and nothing more.
Which Claude plans it runs on
None of the 819 directory sheets states availability by plan, and no official source publishes it connector by connector.
The published rule is general: desktop extensions like this one install on Claude Desktop, while remote connectors, such as Lumin's other entry, are open to all users on Claude, Cowork, Claude Desktop and mobile. On Team and Enterprise, an Owner or Primary Owner turns a connector on for the organization before members can use it. For the current state of this extension, open its sheet in the official directory.
Limits of the Claude Lumin desktop extension
A connector is not an automation: Claude calls these tools while it answers you, and nothing happens on its own when a signer completes a document.
What this page says comes from the directory sheet and Lumin's developer documentation, which is written for Lumin's remote server rather than for this extension. Neither Claude's help center nor Anthropic's developer docs cover it. The verification badge is not a security audit, and Anthropic states on every sheet that it does not control a publisher's tools. For event-driven work on your documents, the Integrations hub lists the automation pages.
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