Harvest

Harvest is a cloud-based time tracking, project management, expense tracking, and invoicing platform used by agencies, consultancies, and professional services teams to track billable hours, manage budgets, and bill clients. The platform provides reporting on team utilization, project profitability, and budget burn, and integrates with tools like Asana, Trello, Slack, and QuickBooks. Harvest's REST API v2 provides full programmatic access to clients, projects, tasks, time entries, expenses, invoices, estimates, and users using OAuth 2.0 or Personal Access Token authentication.

Harvest publishes 11 APIs on the APIs.io network, including Clients API, Company API, Estimates API, and 8 more. Tagged areas include Time Tracking, Project Management, Invoicing, Expense Tracking, and Timesheets.

Harvest’s developer surface includes authentication, documentation, pricing, signup flow, engineering blog, support, and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub

34.0/100 thin ▬ flat Agent 17/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs

Time Tracking Project Management Invoicing Expense Tracking Timesheets Professional Services

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 34.0/100 · thin

Contract Quality 12.1 / 23

Developer Ergonomics 5.1 / 18

Access Clarity 5.7 / 18

Operational Transparency 2.2 / 12

Contract Governance 0.0 / 11

Discoverability 6.2 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 17/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/harvest: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 12

Individual APIs this provider publishes, each with its own machine-readable definition.

Harvest API v2

REST API for managing clients, projects, tasks, time entries, expenses, invoices, estimates, and users in Harvest. Supports OAuth 2.0 and Personal Access Token authentication, r...

Harvest Clients API

The Clients API from Harvest — 2 operation(s) for clients.

Harvest Company API

The Company API from Harvest — 1 operation(s) for company.

Harvest Estimates API

The Estimates API from Harvest — 2 operation(s) for estimates.

Harvest Expenses API

The Expenses API from Harvest — 2 operation(s) for expenses.

Harvest Invoices API

The Invoices API from Harvest — 2 operation(s) for invoices.

Harvest Projects API

The Projects API from Harvest — 2 operation(s) for projects.

Harvest Reports API

The Reports API from Harvest — 4 operation(s) for reports.

Harvest Roles API

The Roles API from Harvest — 2 operation(s) for roles.

Harvest Tasks API

The Tasks API from Harvest — 2 operation(s) for tasks.

Harvest TimeEntries API

The TimeEntries API from Harvest — 5 operation(s) for timeentries.

Harvest Users API

The Users API from Harvest — 3 operation(s) for users.

Scroll for all 12

Open Collections 13

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Harvest API v2 Clients API

OPEN COLLECTION

Harvest API v2 Clients Company API

OPEN COLLECTION

Harvest API v2 Clients Estimates API

OPEN COLLECTION

Harvest API v2 Clients Expenses API

OPEN COLLECTION

Harvest API v2 Clients Invoices API

OPEN COLLECTION

Harvest API v2 Clients Projects API

OPEN COLLECTION

Harvest API v2 Clients Reports API

OPEN COLLECTION

Harvest API v2 Clients Roles API

OPEN COLLECTION

Harvest API v2 Clients Tasks API

OPEN COLLECTION

Harvest API v2 Clients TimeEntries API

OPEN COLLECTION

Harvest API v2 Clients Users API

OPEN COLLECTION

Harvest API v2

OPEN COLLECTION

Scroll for all 13

Security Posture 4

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Harvest Authentication

http · 1 scheme

SECURITY

Harvest Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Harvest Vulnerability Disclosure

disclosure policy published

SECURITY

Harvest Trust Center

SOC 2, PCI DSS

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Harvest Agentic Access

55 operations · 31 acting · 2 human-in-the-loop

55 operations · 31 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Signup

Signup

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 4

Authentication, authorization, and security posture

TrustCenter

TrustCenter

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

Commercial 1

Pricing, plans, and the legal terms of use

Pricing

Pricing

Company 3

The organization behind the API

Website

Website

Blog

Blog

LinkedIn

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

aid: harvest
name: Harvest
description: Harvest is a cloud-based time tracking, project management, expense tracking, and invoicing platform used by
  agencies, consultancies, and professional services teams to track billable hours, manage budgets, and bill clients. The
  platform provides reporting on team utilization, project profitability, and budget burn, and integrates with tools like
  Asana, Trello, Slack, and QuickBooks. Harvest's REST API v2 provides full programmatic access to clients, projects, tasks,
  time entries, expenses, invoices, estimates, and users using OAuth 2.0 or Personal Access Token authentication.
type: Index
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/harvest.png
tags:
- Time Tracking
- Project Management
- Invoicing
- Expense Tracking
- Timesheets
- Professional Services
url: https://raw.githubusercontent.com/api-evangelist/harvest/refs/heads/main/apis.yml
created: '2026-05-11'
modified: '2026-05-11'
specificationVersion: '0.23'
apis:
- aid: harvest:api-v2
  name: Harvest API v2
  description: REST API for managing clients, projects, tasks, time entries, expenses, invoices, estimates, and users in Harvest.
    Supports OAuth 2.0 and Personal Access Token authentication, requires a Harvest-Account-Id header, and uses standard JSON
    request/response over HTTPS.
  humanURL: https://help.getharvest.com/api-v2/
  baseURL: https://api.harvestapp.com/v2
  tags:
  - Time Tracking
  - Project Management
  - Invoicing
  - Expense Tracking
  - Timesheets
  - Authentication
  - Personal Access Token
  tags_raw:
  - Time Tracking
  - Project Management
  - Invoicing
  - Expense Tracking
  - Timesheets
  - OAuth 2.0
  - Personal Access Token
  properties:
  - type: Documentation
    url: https://help.getharvest.com/api-v2/
  - type: Authentication
    url: https://help.getharvest.com/api-v2/authentication-api/authentication/authentication/
  - type: Overview
    url: https://help.getharvest.com/api-v2/introduction/overview/general/
- aid: harvest:harvest-clients-api
  name: Harvest Clients API
  description: The Clients API from Harvest — 2 operation(s) for clients.
  humanURL: https://help.getharvest.com/api-v2/
  baseURL: https://api.harvestapp.com/v2
  tags:
  - Clients
  properties:
  - type: OpenAPI
    url: openapi/harvest-clients-api-openapi.yml
- aid: harvest:harvest-company-api
  name: Harvest Company API
  description: The Company API from Harvest — 1 operation(s) for company.
  humanURL: https://help.getharvest.com/api-v2/
  baseURL: https://api.harvestapp.com/v2
  tags:
  - Company
  properties:
  - type: OpenAPI
    url: openapi/harvest-company-api-openapi.yml
- aid: harvest:harvest-estimates-api
  name: Harvest Estimates API
  description: The Estimates API from Harvest — 2 operation(s) for estimates.
  humanURL: https://help.getharvest.com/api-v2/
  baseURL: https://api.harvestapp.com/v2
  tags:
  - Estimates
  properties:
  - type: OpenAPI
    url: openapi/harvest-estimates-api-openapi.yml
- aid: harvest:harvest-expenses-api
  name: Harvest Expenses API
  description: The Expenses API from Harvest — 2 operation(s) for expenses.
  humanURL: https://help.getharvest.com/api-v2/
  baseURL: https://api.harvestapp.com/v2
  tags:
  - Expenses
  properties:
  - type: OpenAPI
    url: openapi/harvest-expenses-api-openapi.yml
- aid: harvest:harvest-invoices-api
  name: Harvest Invoices API
  description: The Invoices API from Harvest — 2 operation(s) for invoices.
  humanURL: https://help.getharvest.com/api-v2/
  baseURL: https://api.harvestapp.com/v2
  tags:
  - Invoices
  properties:
  - type: OpenAPI
    url: openapi/harvest-invoices-api-openapi.yml
- aid: harvest:harvest-projects-api
  name: Harvest Projects API
  description: The Projects API from Harvest — 2 operation(s) for projects.
  humanURL: https://help.getharvest.com/api-v2/
  baseURL: https://api.harvestapp.com/v2
  tags:
  - Project
  tags_raw:
  - Projects
  properties:
  - type: OpenAPI
    url: openapi/harvest-projects-api-openapi.yml
- aid: harvest:harvest-reports-api
  name: Harvest Reports API
  description: The Reports API from Harvest — 4 operation(s) for reports.
  humanURL: https://help.getharvest.com/api-v2/
  baseURL: https://api.harvestapp.com/v2
  tags:
  - Reports
  properties:
  - type: OpenAPI
    url: openapi/harvest-reports-api-openapi.yml
- aid: harvest:harvest-roles-api
  name: Harvest Roles API
  description: The Roles API from Harvest — 2 operation(s) for roles.
  humanURL: https://help.getharvest.com/api-v2/
  baseURL: https://api.harvestapp.com/v2
  tags:
  - Roles
  properties:
  - type: OpenAPI
    url: openapi/harvest-roles-api-openapi.yml
- aid: harvest:harvest-tasks-api
  name: Harvest Tasks API
  description: The Tasks API from Harvest — 2 operation(s) for tasks.
  humanURL: https://help.getharvest.com/api-v2/
  baseURL: https://api.harvestapp.com/v2
  tags:
  - Task
  tags_raw:
  - Tasks
  properties:
  - type: OpenAPI
    url: openapi/harvest-tasks-api-openapi.yml
- aid: harvest:harvest-timeentries-api
  name: Harvest TimeEntries API
  description: The TimeEntries API from Harvest — 5 operation(s) for timeentries.
  humanURL: https://help.getharvest.com/api-v2/
  baseURL: https://api.harvestapp.com/v2
  tags:
  - Time Entries
  tags_raw:
  - TimeEntries
  properties:
  - type: OpenAPI
    url: openapi/harvest-timeentries-api-openapi.yml
- aid: harvest:harvest-users-api
  name: Harvest Users API
  description: The Users API from Harvest — 3 operation(s) for users.
  humanURL: https://help.getharvest.com/api-v2/
  baseURL: https://api.harvestapp.com/v2
  tags:
  - User
  tags_raw:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/harvest-users-api-openapi.yml
common:
- type: CapabilityMap
  url: capabilities/harvest-capability-edges.yml
  name: Harvest Business Capability Map
- type: AgenticAccess
  url: agentic-access/harvest-agentic-access.yml
- type: TrustCenter
  url: security/harvest-trust-center.yml
- type: VulnerabilityDisclosure
  url: security/harvest-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/harvest-domain-security.yml
- type: Authentication
  url: authentication/harvest-authentication.yml
- type: Website
  url: https://www.getharvest.com
- type: Documentation
  url: https://help.getharvest.com/api-v2/
- type: Pricing
  url: https://www.getharvest.com/pricing
- type: Signup
  url: https://id.getharvest.com/signup
- type: Blog
  url: https://www.getharvest.com/blog
- type: Support
  url: https://help.getharvest.com
- type: StatusPage
  url: https://www.harveststatus.com
- type: GitHubOrganization
  url: https://github.com/harvesthq
- type: LinkedIn
  url: https://www.linkedin.com/company/harvest
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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