Read projects, invoices, hours and contacts; register hours, create tasks in Gripp. For agencies and service teams that run projects, hours and invoices in Gripp. Hosted by usefulapi — connect from Claude, ChatGPT, Cursor, or any MCP client.
Team and Enterprise: an Owner adds the connector for the organization first.
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"
}
}
}No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.
Run these commands. The second one opens the login page:
Other MCP clients (Windsurf, Cline, Zed and more): add the URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser. Do not add an Authorization header: see Before you connect.
List the projects that are not archived. See the phase, company, account manager and totals of each one.
gripp_list_projects
List the invoices with their status and open amount. Open one invoice to read its lines and see what the company must pay.
gripp_list_invoices gripp_list_invoice_lines
List the time registrations of a month with date, employee, task and status. Add them up to check the budget of a project.
gripp_list_hours gripp_list_projects
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 data · gripp_create_hour gripp_list_employees
Create a task in Gripp with a description. Each call creates a new task, so do not repeat it.
Changes data · gripp_create_task gripp_list_projects
Find the company, then create a contact person with name, e-mail and phone. Each call creates a new contact.
Changes data · gripp_list_companies gripp_create_contact
The 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.
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.
Turn on the Gripp connector, then ask in plain words. The AI picks the tools.
| Tool | Type | What it does |
|---|---|---|
gripp_list_companies | read | List companies List companies in Gripp. Companies (customers, suppliers, prospects) with address, VAT/COC numbers, customer number and active flag. Supports filters, paging (max 250 per call) and ordering. Gripp API: company.get. |
gripp_list_contacts | read | List contacts List contacts in Gripp. Contact persons with name, e-mail, phone, function and the company id. Supports filters, paging (max 250 per call) and ordering. Gripp API: contact.get. |
gripp_list_projects | read | List projects List projects in Gripp. Projects with name, number, phase, company, account manager, dates, totals and archived flag. Supports filters, paging (max 250 per call) and ordering. Gripp API: project.get. |
gripp_list_tasks | read | List tasks List tasks in Gripp. Tasks with description, phase, deadline, estimated hours, company and completion state. Supports filters, paging (max 250 per call) and ordering. Gripp API: task.get. |
gripp_list_hours | read | List hours List hours in Gripp. Time registrations (hours) with date, amount, employee, task, status and description. Supports filters, paging (max 250 per call) and ordering. Gripp API: hour.get. |
gripp_list_invoices | read | List invoices List invoices in Gripp. Sales invoices with number, date, status, company, totals, amount paid and open amount. Supports filters, paging (max 250 per call) and ordering. Gripp API: invoice.get. |
gripp_list_offers | read | List offers List offers in Gripp. Quotes (offers) with number, name, date, phase, company, totals and acceptance status. Supports filters, paging (max 250 per call) and ordering. Gripp API: offer.get. |
gripp_list_employees | read | List employees List employees in Gripp. Employees with name, e-mail, function, department, role and active flag. Supports filters, paging (max 250 per call) and ordering. Gripp API: employee.get. |
gripp_list_tags | read | List tags List tags in Gripp. Tags that Gripp uses to label companies, contacts, projects and invoices. Supports filters, paging (max 250 per call) and ordering. Gripp API: tag.get. |
gripp_get_record | read | Get one record Get one Gripp record by its numeric id, for companies, contacts, projects, tasks, hours, invoices, offers, employees or invoice lines. Gripp API: <entity>.getone. |
gripp_list_invoice_lines | read | List invoice lines List invoice lines (description, amount, price, VAT) for one invoice id. Use this to see what an invoice contains. Gripp API: invoiceline.get. |
gripp_create_hour | write | Register hours WRITE: register hours on a project (and optionally a task) in Gripp. Creates a new time registration each call; a repeat creates a duplicate. Status CONCEPT keeps it editable. Gripp API: hour.create. |
gripp_create_task | write | Create a task WRITE: create a task in Gripp. Creates a new task each call; a repeat creates a duplicate. Gripp API: task.create. |
gripp_create_contact | write | Create a contact WRITE: create a contact person on a company in Gripp. Creates a new contact each call; a repeat creates a duplicate. Gripp API: contact.create. |
gripp_usage_status | Usage status (free-tier meter) Report the caller's current usage: the plan, calls used this month, the limit of the plan (the free monthly cap or the Pro fair use limit), remaining, and whether the limit is reached. Read-only; does not count against the meter. | |
gripp_request_feature | Request a missing feature Tell usefulapi that the user needs something the Gripp tools cannot do yet (a missing tool, field or filter). Call it only when the user asks for something none of the tools can do, and tell the user that you send the request. Do not call it for errors or for normal requests. Do not include personal data, credentials or customer records. Stored with the product name and the client type (for example Claude or Cursor), without the user's account. At most 5 requests per day. Does not count against the meter. | |
gripp_upgrade | Upgrade to Pro (unlimited*) Get Pro: unlimited tool calls (fair use limit: 10,000 a month) on Gripp (the free tier caps monthly usage). Plans: "monthly" — $9/month; "yearly" — $90/year (2 months free). Cancel any time: Pro then runs to the end of the paid period, so it also suits a one-time job. *A fair use limit applies. For heavy use (near Pro's limit): "plus" or "plus_yearly" — Pro+, $39/month or $390/year, unlimited tool calls (fair use limit: 100,000 a month); an existing Pro subscription changes to Pro+ in place (needs confirm: true; the price difference for the rest of the period is charged at once). Otherwise returns a short link to open in your browser (it opens Stripe Checkout); after payment the account upgrades automatically. Does not count against the meter. | |
gripp_cancel_subscription | Cancel the Pro subscription Cancel the caller's Gripp Pro subscription at the end of the paid period (no refund for the current period; Pro continues until then, then the free tier applies). Requires confirm: true. Run gripp_upgrade later to undo the cancel before the period ends. Does not count against the meter. |
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 50 tool calls / month |
| Proper user | $9/mo · $90/yr | Unlimited* |
*Pro fair use limit: 10,000 tool calls a month on this server. For more, write to [email protected].
Pro covers this Gripp server only. Subscribe with gripp_upgrade (it returns a Stripe Checkout link). Cancel any time with gripp_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running gripp_upgrade before then undoes the cancel. Or write to [email protected].
Review 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 unlimited tool calls (fair use limit: 10,000 tool calls a month), for this Gripp server only. Cancel any time: Pro 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: it returns a Stripe Checkout link. To cancel, run gripp_cancel_subscription. Pro 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.