Productivity & Project Management · Harvest + Claude
Harvest MCP with Claude: Time Tracking and Invoicing on Autopilot
The short answer
Claude connects to Harvest through the Model Context Protocol (MCP), an open standard that lets Claude securely read and act inside the tool. Once connected with OAuth sign-in, Claude can log hours, check project budgets, prepare invoices and pull time reports from a plain-language request, with permissions your organisation controls.
What is Harvest?
Harvest is a time-tracking and invoicing platform used by teams, agencies and freelancers. It lets people log billable hours against projects and tasks, monitor how much budget is left on each client engagement, and turn tracked time into invoices and payments. Finance teams, project managers and consultants typically rely on it to know what work is billable and to get paid accurately and on time.
How Claude connects to Harvest through MCP
The Model Context Protocol, or MCP, is an open standard that acts like a universal adapter between Claude and other software. It gives Claude a secure, structured way to use a tool such as Harvest, reading information and taking actions the organisation has allowed. Claude does not get open-ended access. Each connection is set up deliberately.
Once Harvest is connected through its official MCP server or a secure managed connector, Claude can typically look up projects and clients, check hours logged against budgets, create time entries, prepare invoice drafts and pull time reports. A team member could ask, in ordinary language, how many hours remain on a retainer, and Claude would answer from live Harvest data.
Permissions and approvals keep people in charge. Access uses the OAuth sign-in that Harvest supports, and it is limited to the actions each role needs. Consequential steps, such as sending an invoice to a client, can require a human to review and approve before anything happens. Audit logs record what Claude did, so finance leads can see every change.
What you can automate
Weekly timesheet reminders and clean-up
Claude can review which team members have not logged time for the week, send a polite reminder through your messaging tool, and flag entries that look incomplete, such as tasks with no description or hours logged to the wrong project. This saves managers from chasing timesheets by hand and gives finance cleaner data for billing at month end.
Project budget alerts for account managers
Claude can compare hours logged against each project's budget and warn the account manager when a client is nearing its agreed limit. Early alerts let the team agree a change order with the client before work runs over budget, protecting margins without surprising anyone at invoice time.
Invoice drafting from approved time
Once a month, Claude can gather approved billable time for each client and prepare invoice drafts in Harvest. A finance reviewer checks the figures and approves each one before it is sent, so the team spends minutes reviewing rather than hours building invoices line by line.
Client-ready time reports
A project lead can ask Claude for a summary of hours by person, task and week for a specific client. Claude pulls the report from Harvest and presents it in a clear format, ready to share in a status meeting or attach to a progress update.
Resourcing questions answered on demand
Leaders often need to know who has capacity or how a team's hours are distributed. Claude can answer these questions from Harvest data in seconds, helping operations heads make staffing decisions with current figures instead of waiting for a spreadsheet to be updated.
An end-to-end workflow: Month-end billing run for a consultancy
TriggerThe first working day of each month, or when a finance lead asks Claude to start the billing run.
Claude pulls all approved billable time from Harvest for the previous month, grouped by client and project.
Claude compares totals against each contract's agreed rates and budget and lists any mismatches for review.
Claude prepares draft invoices in Harvest and writes a summary of each client's hours in Microsoft 365 for the finance team.
The finance lead reviews the drafts and the flagged items, and approves the invoices that are ready.
Claude records the approved invoices in the CRM against each client account so account managers see billing status.
OutcomeBilling runs faster and with fewer errors, invoices go out on schedule, and account managers always know where each client stands. Results vary by organisation, but teams commonly report a much shorter billing cycle.
How we set it up
Book a free automation audit
We review how your team tracks time and bills clients today, and identify the workflows in Harvest worth automating first.
Connect Harvest securely
We connect Claude to Harvest using its OAuth sign-in and an MCP server, either the official one or a secure managed connector, with least-privilege access for each role.
Design the end-to-end workflow
We map how Harvest connects with your Microsoft 365, CRM, ERP or ticketing systems, and agree which actions need human approval.
Test against real past cases
We run the workflow on past projects and invoices to check accuracy before anything touches live client billing.
Launch, monitor and train
We go live with audit logs and monitoring in place, then train your finance, project and operations teams to use Claude confidently.
Who benefits
- Finance and billing leads
- Faster month-end billing with draft invoices prepared from approved time and clear audit trails.
- Project and account managers
- Early warnings on budget overruns so change orders can be agreed before margins are affected.
- Operations and department heads
- Quick answers on utilisation and capacity drawn from live time data, without waiting for reports.
- Freelancers and small agency owners
- Less admin time spent on timesheets and invoices, and more time for billable client work.
Security and control
- Least-privilege access, so Claude can only perform the actions each role has been granted.
- OAuth sign-in, so access is controlled through the method Harvest supports rather than shared passwords.
- Human approval required for consequential steps such as sending invoices or changing client rates.
- Audit logs that record what Claude read and changed in Harvest, for review and compliance checks.
- Staged testing against real past cases before any live client billing is affected.
For teams in the US, UK, India and the Middle East
Organisations in the United States and the United Kingdom can host the Claude workflow in their chosen region and align it with applicable privacy rules. Businesses in India must meet the Digital Personal Data Protection Act, 2023, and we design data handling to support that. Organisations in the UAE and Saudi Arabia are subject to local data protection laws, so we select a hosting region that meets those requirements. Hosting regions are chosen to match each client's legal and contractual needs, and we confirm this during the audit.
Learn more about Claude and MCP
Anthropic's AI model and assistant.
Secure links between Claude and business tools.
How engineers build and change software with Claude.
Hosted agents that run multi-step work.
The open standard Claude uses to connect to tools.
Frequently asked questions
What does the Harvest MCP server do?
The Harvest MCP server is a secure bridge that lets Claude and other AI tools work with Harvest data. Through it, Claude can typically read projects, time entries and reports, and carry out permitted actions such as logging hours or preparing invoice drafts. It follows the access rules you set, so Claude only does what it has been allowed to do.
Is connecting Harvest to Claude secure?
Yes, when set up correctly. Access uses the OAuth sign-in that Harvest supports, and permissions are limited to what each role needs. Consequential actions can require human approval, and audit logs record activity. We also test the setup before it touches live billing data.
What can Claude do with Harvest once connected?
Typically, Claude can look up clients and projects, check hours against budgets, create or review time entries, prepare invoice drafts and generate time reports. People ask for these in plain language. The exact scope depends on the permissions you grant during setup.
How long does setup take?
Many projects can be set up within a few weeks, depending on how many systems are involved and how complex your billing rules are. The free automation audit gives a clearer timeline, and we start with the workflows that deliver value soonest.
Which Harvest plan or permissions are needed?
You need a Harvest account with the access level that matches the actions you want Claude to take, and you will sign in using OAuth. The right permissions depend on your roles and workflows, so we confirm them during the audit rather than assume them.