OKSign MCP by usefulapi

OKSign MCP by usefulapi

Connect at https://oksign.usefulapi.io/mcp.

Connect

• Claude (claude.ai, Desktop): open Customize → Connectors, click + Add → Add custom connector, and paste https://oksign.usefulapi.io/mcp.
• Claude Code: claude mcp add --transport http oksign https://oksign.usefulapi.io/mcp, then run /mcp to log in.
• VS Code: Add to VS Code.
• Cursor and other clients: add the URL as a remote MCP server:

{
  "mcpServers": {
    "oksign": {
      "url": "https://oksign.usefulapi.io/mcp"
    }
  }
}

Add only the URL. Do not add an Authorization header or an API key to the client config: the server signs you in with OAuth, and the login page asks for your OKSign credentials.

Step-by-step setup, where to find your credentials, and FAQ: https://usefulapi.io/oksign/

Connect your OKSign credentials to access your account through usefulapi.

Tools

Tool	Type	What it does
oksign_get_credits	read	Get credits and storage
oksign_list_users	read	List users
oksign_list_email_templates	read	List email templates
oksign_list_contacts	read	List contacts
oksign_list_active_documents	read	List active documents
oksign_list_signed_documents	read	List signed documents
oksign_list_notification_errors	read	List email and SMS delivery errors
oksign_document_exists	read	Check a document exists
oksign_get_document_metadata	read	Get signed document metadata
oksign_get_form_descriptor	read	Get a document's form descriptor
oksign_get_linked_document	read	Find the source or signed copy of a document
oksign_upsert_contacts	write	Add or update contacts
oksign_remove_contacts	write	Remove contacts
oksign_remove_document	write	Remove a document
oksign_usage_status	meta	Usage status (free-tier meter)
oksign_request_feature	meta	Request a missing feature
oksign_upgrade	meta	Upgrade to Pro (unlimited*)
oksign_cancel_subscription	meta	Cancel the Pro subscription

read tools are read-only; write tools mutate data (clients should confirm them); meta tools report usage, manage your subscription or send a feature request.

Pricing

Plan	Price	Limit
Free	$0	50 tool calls / month
Pro (per connected account)	$9/mo or $90/yr (2 months free)	10,000 tool calls / month

Pro covers this server only. Subscribe with oksign_upgrade (it returns a Stripe Checkout link). Cancel any time with oksign_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running oksign_upgrade before then undoes the cancel. Or write to [email protected].

License