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Harvest for AI agents

Harvest is time-tracking and invoicing software for teams and freelancers, used to log billable hours and manage client billing. People teams rely on it to keep employee records accurate without manual double entry. Connect it once through Arc0, and your agent, or Claude, ChatGPT and Cursor, can use it through one MCP endpoint, limited to what each user approved.

Connect HarvestSee the 57 actions ↓
HR and recruitingOAuth 2.0MCP + RESTgetharvest.com
AUDIT LOG · HARVESTPOLICY: acme-support
09:41:07 · claude · u_8f2read
harvest.list_tasks
List Tasks✓ allowed · 212ms
09:41:08 · claude · u_8f2read
harvest.get_task
Get Task✓ allowed · 164ms
09:41:09 · claude · u_8f2write
harvest.create_task
Create Task✓ approved · approved by user
09:41:12 · claude · u_8f2destructive
harvest.delete_task
Delete Task✕ blocked · policy: deny
EVERY HARVEST CALL, ON THE RECORD
01 · USE CASES

What agents do in Harvest.

01

Log a time entry

Record a time entry against a project and task after a work session is completed.

02

Check an invoice's status

Look up an outstanding invoice to see whether a client has paid it yet.

03

Delete a time entry with confirmation

Delete a logged time entry only after the team member confirms it was a mistaken entry.

02 · ACTIONS

57 Harvest actions, graded by risk.

Every Harvest action is tagged read, write or destructive, so one policy covers the whole app and new actions inherit the right default.

read

20

Look things up. Allowed by default.

  • harvest.get_task
    Get Task
  • harvest.get_user
    Get User
  • harvest.get_client
    Get Client
  • harvest.list_tasks
    List Tasks
  • harvest.list_users
    List Users
  • harvest.get_invoice
    Get Invoice
  • harvest.get_project
    Get Project
  • harvest.get_estimate
    Get Estimate
  • harvest.list_clients
    List Clients
  • harvest.list_invoices
    List Invoices
  • harvest.list_projects
    List projects
  • harvest.get_time_entry
    Get Time Entry
  • harvest.get_company_info
    Get Company Info
  • harvest.list_time_entries
    List Time Entries
  • harvest.list_client_contacts
    List Client Contacts
  • harvest.list_invoice_messages
    List Invoice Messages
+ 4 MORE

write

25

Create and change things. Allow, or ask the user first.

  • harvest.create_task
    Create Task
  • harvest.create_user
    Create User
  • harvest.update_task
    Update Task
  • harvest.update_user
    Update User
  • harvest.create_client
    Create Client
  • harvest.update_client
    Update Client
  • harvest.create_expense
    Create Expense
  • harvest.create_invoice
    Create Invoice
  • harvest.create_project
    Create Project
  • harvest.update_expense
    Update Expense
  • harvest.update_invoice
    Update Invoice
  • harvest.update_project
    Update Project
  • harvest.create_estimate
    Create Estimate
  • harvest.update_estimate
    Update Estimate
  • harvest.create_time_entry
    Create Time Entry
  • harvest.update_time_entry
    Update Time Entry
+ 9 MORE

destructive

12

Delete, cancel or archive. Ask first, or deny outright.

  • harvest.delete_task
    Delete Task
  • harvest.delete_user
    Delete User
  • harvest.delete_client
    Delete Client
  • harvest.delete_invoice
    Delete Invoice
  • harvest.delete_project
    Delete Project
  • harvest.delete_estimate
    Delete Estimate
  • harvest.delete_time_entry
    Delete Time Entry
  • harvest.delete_client_contact
    Delete Client Contact
  • harvest.delete_invoice_message
    Delete Invoice Message
  • harvest.delete_invoice_payment
    Delete Invoice Payment
  • harvest.delete_estimate_message
    Delete Estimate Message
  • harvest.delete_invoice_item_category
    Delete Invoice Item Category
03 · HOW IT WORKS

Harvest in three steps.

  1. 01Your users connect HarvestThey sign in to Harvest on Arc0 Connect, under your brand, and approve the access you ask for.
  2. 02You set the rulesReads run, writes like “create Task” can wait for the user, and “delete Task” can be denied outright.
  3. 03Any agent can actYour agent calls Harvest through the Arc0 SDK or MCP, and so can Claude, ChatGPT and Cursor. Every call lands on the audit log.
POLICY.TS
await arc0.policies.set('harvest', {
  read: 'allow',
  write: 'ask',        // create_task
  destructive: 'deny',  // delete_task
})

# Claude Code: the same connection, one URL
$ claude mcp add --transport http arc0 \
    https://mcp.arc0.ai/u/u_8f2
04 · AUTH AND DATA

How Harvest connects.

Users sign in to Harvest on Arc0 Connect and approve the scopes you request. Build with Arc0’s Harvest OAuth app, or bring your own so the Harvest consent screen names you. Tokens refresh automatically, and you can export them whenever you want.

The same Harvest connection serves your agent over MCP and your own backend over REST and the proxy, so a user connects once. How Arc0 handles credentials →

AUTH
OAuth 2.0
CREDENTIALS
Per-tenant encrypted vault
MODEL SEES
Results only, never credentials
AUDIT LOG
Every call, on every plan
05 · WORKS WITH

Use Harvest from any agent.

Claude
ChatGPT
Cursor
Codex
VS Code
OpenAI Agents SDK
Claude Agent SDK
Vercel AI SDK
Mastra
LangGraph
06 · RELATED

More hr and recruiting apps.

Ashby125 actions7shifts10 actionsWorkday587 actionsGusto192 actionsGreenhouse134 actionsClockify75 actionsLever64 actionsSAP SuccessFactors64 actions
ALL HR AND RECRUITING APPS →
07 · FAQ

Harvest and Arc0, answered.

Q01

Can I use Harvest with Claude, ChatGPT or Cursor?

Yes. Connect Harvest to Arc0 once, then add your Arc0 MCP URL to Claude, ChatGPT, Cursor, Claude Code or any other remote-MCP client. Each assistant only gets the Harvest actions you allow.

Q02

How do users connect Harvest?

Users sign in to Harvest on Arc0 Connect and approve the scopes you request. Build with Arc0’s Harvest OAuth app, or bring your own so the Harvest consent screen names you. Tokens refresh automatically, and you can export them whenever you want.

Q03

Which Harvest actions can my agent take?

57 in total: 20 read, 25 write and 12 destructive, such as “create Task”. Your policies decide which of them each agent may call.

Q04

Can I stop my agent from deleting things in Harvest?

Yes. Actions like “delete Task” are graded destructive. Set destructive actions to deny, or to ask so the user approves each one, and blocked calls still show up on the audit log.

Q05

Can my own backend call Harvest too?

Yes. The same Harvest connection is available over REST and through the Arc0 proxy, so your product and your agent share one connection per user.

Get started

Plug Harvest into your agent.

Your users connect Harvest once, under your brand. Your agent gets 57 actions behind your policies, with every call on the record.

Connect HarvestBrowse all apps →

Free to build · MCP + REST · Audit log on every plan