OpenWater MCP by usefulapi

OpenWater MCP by usefulapi

Use your OpenWater account from Claude, Cursor, or any MCP client. Read programs, applications, evaluations, sessions and funds, and create or update users. Hosted, no local install: connect with your own credentials.

Live endpoint: https://openwater.usefulapi.io/mcp · Homepage: https://usefulapi.io

Connect

• Claude (claude.ai, Desktop): open Customize → Connectors, click + Add → Add custom connector, and paste https://openwater.usefulapi.io/mcp.
• Claude Code: claude mcp add --transport http openwater https://openwater.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": {
    "openwater": {
      "url": "https://openwater.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 OpenWater credentials.

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

On first connect you provide your OpenWater domain (for example yourorg.secure-platform.com) and an OpenWater API key (System Settings → Permissions → API Keys). The server validates it and stores it per user. No keys go in config files.

Tools

Tool	Type	What it does
openwater_list_programs	read	List programs
openwater_get_program	read	Get a program
openwater_list_applications	read	List applications
openwater_get_application	read	Get an application
openwater_list_users	read	List users
openwater_get_user	read	Get a user
openwater_create_user	write	Create a user
openwater_update_user	write	Update a user
openwater_list_evaluations	read	List evaluations
openwater_list_sessions	read	List sessions
openwater_list_funds	read	List funds
openwater_usage_status	meta	Usage status (free-tier meter)
openwater_request_feature	meta	Request a missing feature
openwater_upgrade	meta	Upgrade to Pro or Pro+
openwater_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 user)	$9/mo or $90/yr (2 months free)	10,000 tool calls / month
Pro+ (per user)	$39/mo or $390/yr (2 months free)	100,000 tool calls / month

Each paid plan covers this server only. Ask your AI to run openwater_upgrade and choose Pro or Pro+, billed monthly or yearly (it returns a Stripe Checkout link). If you already have Pro, ask to change it to Pro+. The change requires your confirmation, keeps your billing interval and charges the price difference for the rest of the period immediately. Cancel any time with openwater_cancel_subscription: your paid plan continues to the end of the paid period, with no refund for the current period, and asking to resume the same plan with openwater_upgrade before then undoes the cancel. Or write to [email protected].

License

MIT — see LICENSE. Documentation only; the server is hosted.