Read projects, invoices, hours and contacts; register hours, create tasks in Gripp. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
Turn on the Gripp connector, then ask in plain words. The AI picks the tools.
For agencies and service teams that run projects, hours and invoices in Gripp.
List the projects that are not archived. See the phase, company, account manager and totals of each one.
List the invoices with their status and open amount. Open one invoice to read its lines and see what the company must pay.
List the time registrations of a month with date, employee, task and status. Add them up to check the budget of a project.
Create a time registration on a project for an employee. Use the concept status to keep the entry editable. Each call creates a new record.
Changes dataCreate a task in Gripp with a description. Each call creates a new task, so do not repeat it.
Changes dataFind the company, then create a contact person with name, e-mail and phone. Each call creates a new contact.
Changes dataThe login page asks for your Gripp API key.
Create it in Gripp → Settings → API keys (you need to be an application administrator). The API role of the key sets what this server can read or write. Your key is used only to call the Gripp API on your behalf and to derive a private account id; it is never 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": {
"gripp": {
"url": "https://gripp.usefulapi.io/mcp"
}
}
} Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"gripp": {
"type": "http",
"url": "https://gripp.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 Gripp 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 |
| Proper user | $9/mo · $90/yr | 10,000 tool calls / month |
| Pro+per user | $39/mo · $390/yr | 100,000 tool calls / month |
Each paid plan covers this Gripp server only. Ask your AI to run gripp_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 gripp_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 gripp_upgrade before then undoes the cancel. Or write to [email protected].
gripp_list_companiesgripp_list_contactsgripp_list_projectsgripp_list_tasksgripp_list_hoursgripp_list_invoicesgripp_list_offersgripp_list_employeesgripp_list_tagsgripp_get_recordgripp_list_invoice_linesgripp_create_hourgripp_create_taskgripp_create_contactgripp_usage_statusgripp_request_featuregripp_upgradegripp_cancel_subscriptionReview the active projects and their managers. Find unpaid invoices per company. Report hours on a project for a period. Register hours after a client call. Create a follow-up task from a meeting. Add a contact person to a company. See what you can do for the details.
No. usefulapi is an independent service. It is not affiliated with or endorsed by Gripp. The server calls the Gripp API with your own Gripp 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 Gripp API key. See Before you connect for where to find it.
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 Gripp 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 Gripp 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 Gripp.
Yes, if you approve it. 3 of the 14 Gripp tools can create or change data. The other 11 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 Gripp server only. Cancel any time: your paid plan then runs to the end of the paid period. Run gripp_usage_status to see how many calls you used.
Ask the AI to run gripp_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 gripp_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 gripp_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.