Which AI assistants work with Zentract?

Assistants that connect to remote MCP servers with sign-in, such as Claude and ChatGPT. Add https://mcp.zentract.io/mcp as a custom connector.

Can an assistant see or change my invoices?

Not through the MCP server: its tools cover tasks, projects, clients, time entries and timers. Apps built on the API can read or write invoices, quotes and proposals only when you approve those permissions.

Whose access does an assistant use?

Yours. It works in your selected organization with the permissions you approved when you connected it.

How do I remove an assistant's or app's access?

In Organization settings, open Authorized apps and revoke it.

No. The API is plain HTTPS and JSON, and the OpenAPI specification works with standard code generators.

Connect AI assistants and your own tools

Zentract has an MCP server for AI assistants and an OAuth 2 API for your own software. Both act for a signed-in user, only with the access that user approves.

AI assistants

Assistants that support MCP connectors, such as Claude and ChatGPT, can work in your Zentract workspace: find tasks, log time, and start or stop your timer while you talk. For example:

“Start a timer on the homepage redesign task.”
“What did we log for Kralendijk Dive Co this week?”
“Create a task to send the September invoice, due Friday.”

Connect an assistant

Add Zentract as a connector
In your assistant's connector or MCP settings, add a custom connector with this server URL:https://mcp.zentract.io/mcp
Sign in and approve
Your assistant opens Zentract. Sign in and approve the access it asks for.
Ask
The assistant can now use Zentract's tools in your conversations.

Tools

Get current context
List tasks
Create task
Update task
List projects
List clients
List time entries
Create manual time entry
Get running timer
Start timer
Stop timer

API

A REST API over HTTPS with JSON responses for clients, projects, tasks, time entries, invoices, quotes, proposals, reports and tax. Access uses OAuth 2: the authorization code flow with PKCE, refresh tokens, and scopes such as invoices:read or tasks:write, so an app only gets what the user approves.

API reference · OpenAPI specification

Build an app

Create an app
Sign in and open the developer portal to get a client ID and secret, set redirect URIs, and choose the permissions your app needs.
Send users through sign-in
Your app redirects to Zentract, where the user signs in and approves the permissions.
Call the API
Send the access token as a bearer token, and refresh it when it expires.

An app can also add a bot member to each workspace that installs it, so people can assign it tasks. The app acts as its bot with the client credentials grant, limited to member access and the permissions the workspace approved.

Apps that customers install are listed in the Zentract marketplace after Zentract reviews them.

Questions

Which AI assistants work with Zentract?: Assistants that connect to remote MCP servers with sign-in, such as Claude and ChatGPT. Add https://mcp.zentract.io/mcp as a custom connector.
Can an assistant see or change my invoices?: Not through the MCP server: its tools cover tasks, projects, clients, time entries and timers. Apps built on the API can read or write invoices, quotes and proposals only when you approve those permissions.
Whose access does an assistant use?: Yours. It works in your selected organization with the permissions you approved when you connected it.
How do I remove an assistant's or app's access?: In Organization settings, open Authorized apps and revoke it.
Is there an SDK?: No. The API is plain HTTPS and JSON, and the OpenAPI specification works with standard code generators.

AI assistants

Assistants that support MCP connectors, such as Claude and ChatGPT, can work in your Zentract workspace: find tasks, log time, and start or stop your timer while you talk. For example:

“Start a timer on the homepage redesign task.”
“What did we log for Kralendijk Dive Co this week?”
“Create a task to send the September invoice, due Friday.”

Connect an assistant

Add Zentract as a connector
In your assistant's connector or MCP settings, add a custom connector with this server URL:https://mcp.zentract.io/mcp
Sign in and approve
Your assistant opens Zentract. Sign in and approve the access it asks for.
Ask
The assistant can now use Zentract's tools in your conversations.

Tools

Get current context
List tasks
Create task
Update task
List projects
List clients
List time entries
Create manual time entry
Get running timer
Start timer
Stop timer

API

API reference · OpenAPI specification

Build an app

Create an app
Sign in and open the developer portal to get a client ID and secret, set redirect URIs, and choose the permissions your app needs.
Send users through sign-in
Your app redirects to Zentract, where the user signs in and approves the permissions.
Call the API
Send the access token as a bearer token, and refresh it when it expires.

Apps that customers install are listed in the Zentract marketplace after Zentract reviews them.

Questions

Which AI assistants work with Zentract?: Assistants that connect to remote MCP servers with sign-in, such as Claude and ChatGPT. Add https://mcp.zentract.io/mcp as a custom connector.
Can an assistant see or change my invoices?: Not through the MCP server: its tools cover tasks, projects, clients, time entries and timers. Apps built on the API can read or write invoices, quotes and proposals only when you approve those permissions.
Whose access does an assistant use?: Yours. It works in your selected organization with the permissions you approved when you connected it.
How do I remove an assistant's or app's access?: In Organization settings, open Authorized apps and revoke it.
Is there an SDK?: No. The API is plain HTTPS and JSON, and the OpenAPI specification works with standard code generators.