Read, create, update and delete records; inspect objects, fields and schema in your Knack database. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
Turn on the Knack connector, then ask in plain words. The AI picks the tools.
For teams who keep business data in Knack no-code database apps.
The AI lists the tables (objects) of the app and the fields of one table with name, type and required flag. You get a clear picture of the data model.
The AI reads the records of a table with paging, sorting and filters, or one record by id. It reports totals and summarizes the rows.
The AI creates a new record from the field values you give, using the field keys of the table. Formula and auto-increment fields cannot be set.
Changes dataThe AI finds records and changes chosen fields on each. Only the fields you name are changed.
Changes dataThe AI finds a record and deletes it for good. This cannot be undone, so it should show you the record first.
Changes dataThe login page asks for your Application ID and REST API Key.
Find both in Knack Builder → Settings → API & Code. Your credentials are used only to call the Knack API on your behalf; the Application ID is your private tenant key and neither value is ever shown to anyone.
Team and Enterprise: an Owner adds the connector for the organization first.
No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.
Run this command, then run /mcp in Claude Code to log in:
Add to Cursor or add this to ~/.cursor/mcp.json:
{
"mcpServers": {
"knack": {
"url": "https://knack.usefulapi.io/mcp"
}
}
} Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"knack": {
"type": "http",
"url": "https://knack.usefulapi.io/mcp"
}
}
} Run these commands. The second one opens the login page:
Windsurf, Cline, Zed and other MCP clients: add this URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser.
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: the login page asks for your Application ID and REST API Key. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 50 tool calls / month |
| Pro | $9/mo · $90/yr | 10,000 tool calls / month |
| Pro+ | $39/mo · $390/yr | 100,000 tool calls / month |
Each paid plan covers this Knack server only. Ask your AI to run knack_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 knack_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 knack_upgrade before then undoes the cancel. Or write to [email protected].
knack_get_applicationknack_list_objectsknack_list_fieldsknack_list_recordsknack_get_recordknack_requestknack_create_recordknack_update_recordknack_delete_recordknack_usage_statusknack_request_featureknack_upgradeknack_cancel_subscriptionExplain how an app is built. Read and filter the records of a table. Add a record to a table. Fix or update records one by one. Delete records you no longer need. See what you can do for the details.
No. usefulapi is an independent service. It is not affiliated with or endorsed by Knack. The server calls the Knack API with your own Knack access, so it sees only the data that your account can see.
Yes. In Claude, add this server's URL as a custom connector. In ChatGPT, add it as a custom MCP server in Plugins. Then log in once. Cursor, VS Code, Claude Code and Codex work too. See the setup steps.
The login page asks for your Application ID and REST API Key. See Before you connect for where to find them.
No. 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: the login page asks for your Application ID and REST API Key. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
The login stores them encrypted in the authorization grant of your connection. The server uses them to call the Knack API for you and to derive a private account id for usage metering. usefulapi does not show them on any page or in any reply. To stop all access, remove the connector and change or delete these credentials in Knack.
Yes, if you approve it. 3 of the 9 Knack tools can create or change data. The other 6 are marked read-only. Most MCP clients ask you to approve a tool call before it runs.
The Free plan gives 50 tool calls / month. Pro costs $9/mo or $90/yr, with 10,000 tool calls / month. Pro+ costs $39/mo or $390/yr, with 100,000 tool calls / month. Each subscription covers this Knack server only. Cancel any time: your paid plan then runs to the end of the paid period. Run knack_usage_status to see how many calls you used.
Ask the AI to run knack_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+. After you confirm, your existing subscription changes in place, keeps its billing interval and charges the price difference for the rest of the period immediately. To cancel, run knack_cancel_subscription. Your paid plan continues to the end of the paid period.
Tell the AI what you wanted to do. It can send the request with knack_request_feature. We store the text with the server name, the type of AI client and the tool you tried, not with your account, and read every request when we plan new tools. You can send up to 5 requests per day.
Any client that supports remote MCP servers (Streamable HTTP) with OAuth login: Claude (web and desktop), Claude Code, ChatGPT, Codex, Cursor, VS Code, Windsurf and others.
This is a Model Context Protocol endpoint — meant to be connected from an AI client, not opened in a browser. An invalid_token response at the URL is the auth gate working as designed; clients authenticate automatically.
Need a tool this server does not have, or a connection to another system? We build custom integrations and MCP servers.