FreshBooks website screenshot

FreshBooks

FreshBooks is a cloud-based accounting and small business management platform offering invoicing, expense tracking, time tracking, project management, payments, estimates, and financial reporting for freelancers, self-employed professionals, and small businesses. The FreshBooks REST API provides access to clients, invoices, expenses, estimates, projects, time entries, payments, and reports using OAuth 2.0 Bearer token authentication.

FreshBooks publishes 13 APIs on the APIs.io network, including REST API, Webhooks (Callbacks API), Auth API, and 10 more. Tagged areas include Accounting, Invoicing, Expense Tracking, Time Tracking, and Small Business.

The FreshBooks catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

FreshBooks’ developer surface includes authentication, documentation, signup flow, pricing, support, engineering blog, and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub
39.5/100 thin ▬ flat Agent 33/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessSelf serve
13 APIs
AccountingInvoicingExpense TrackingTime TrackingSmall BusinessBookkeeping

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 39.5/100 · thin
Contract Quality 14.7 / 25
Developer Ergonomics 7.0 / 20
Commercial Clarity 4.7 / 20
Operational Transparency 0.7 / 13
Governance 5.0 / 12
Discoverability 7.4 / 10
Agent readiness — 33/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
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 6 / 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
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/freshbooks: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 13

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

FreshBooks REST API

REST API for FreshBooks providing CRUD access to clients, invoices, estimates, expenses, projects, time entries, tasks, payments, items, taxes, and accounting reports. Uses OAut...

FreshBooks Webhooks (Callbacks API)

Event delivery surface for the FreshBooks Callbacks API. Subscribers register an HTTPS endpoint, complete a verifier handshake, and then receive HMAC-SHA256 signed POSTs (applic...

FreshBooks Auth API

The Auth API from FreshBooks — 1 operation(s) for auth.

FreshBooks Clients API

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

FreshBooks Estimates API

The Estimates API from FreshBooks — 1 operation(s) for estimates.

FreshBooks Expenses API

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

FreshBooks Invoices API

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

FreshBooks Items API

The Items API from FreshBooks — 1 operation(s) for items.

FreshBooks Payments API

The Payments API from FreshBooks — 1 operation(s) for payments.

FreshBooks Projects API

The Projects API from FreshBooks — 1 operation(s) for projects.

FreshBooks Tasks API

The Tasks API from FreshBooks — 1 operation(s) for tasks.

FreshBooks Taxes API

The Taxes API from FreshBooks — 1 operation(s) for taxes.

FreshBooks TimeEntries API

The TimeEntries API from FreshBooks — 1 operation(s) for timeentries.

Scroll for all 13

Open Collections 1

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

FreshBooks REST API

OPEN COLLECTION

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

FreshBooks Webhooks (Callbacks API)

Best-effort AsyncAPI 2.6 description of the FreshBooks Webhooks (Callbacks API) surface. FreshBooks delivers webhook notifications as HTTP POST requests with an `application/x-w...

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

FreshBooks API Rules

6 rules · 1 errors 5 warnings

SPECTRAL

Security Posture 2

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

Freshbooks Authentication

http · 1 scheme

SECURITY

Freshbooks Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Agentic Access 1

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

Freshbooks Agentic Access

27 operations · 13 acting

27 operations · 13 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 Signup
Signup
 Login
Login

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 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 1

Status, limits, changes, and where to get help

Support
Support

Commercial 1

Pricing, plans, and the legal terms of use

Pricing
Pricing

Company 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: freshbooks
name: FreshBooks
description: FreshBooks is a cloud-based accounting and small business management platform offering invoicing, expense tracking,
  time tracking, project management, payments, estimates, and financial reporting for freelancers, self-employed professionals,
  and small businesses. The FreshBooks REST API provides access to clients, invoices, expenses, estimates, projects, time
  entries, payments, and reports using OAuth 2.0 Bearer token authentication.
type: Index
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/freshbooks.png
tags:
- Accounting
- Invoicing
- Expense Tracking
- Time Tracking
- Small Business
- Bookkeeping
url: https://raw.githubusercontent.com/api-evangelist/freshbooks/refs/heads/main/apis.yml
created: '2026-05-11'
modified: '2026-05-30'
specificationVersion: '0.19'
apis:
- aid: freshbooks:freshbooks-api
  name: FreshBooks REST API
  description: REST API for FreshBooks providing CRUD access to clients, invoices, estimates, expenses, projects, time entries,
    tasks, payments, items, taxes, and accounting reports. Uses OAuth 2.0 Bearer tokens and is scoped per account via /accounting/account/{accountId}/*
    endpoints.
  humanURL: https://www.freshbooks.com/api/start
  baseURL: https://api.freshbooks.com
  tags:
  - Accounting
  - Invoicing
  - Expenses
  - Time Tracking
  - Projects
  properties:
  - type: Documentation
    url: https://www.freshbooks.com/api/start
  - type: Authentication
    url: https://www.freshbooks.com/api/authentication
  - type: PostmanCollection
    url: https://www.freshbooks.com/api/start
- aid: freshbooks:freshbooks-webhooks
  name: FreshBooks Webhooks (Callbacks API)
  description: Event delivery surface for the FreshBooks Callbacks API. Subscribers register an HTTPS endpoint, complete a
    verifier handshake, and then receive HMAC-SHA256 signed POSTs (application/x-www-form-urlencoded) for noun.verb events
    across bills, bill vendors, categories, clients, credit notes, estimates, expenses, invoices, items, payments, projects,
    recurring templates, services, taxes, and time entries.
  humanURL: https://www.freshbooks.com/api/webhooks
  baseURL: https://api.freshbooks.com
  tags:
  - Webhooks
  - Events
  - Callbacks
  - Accounting
  - Invoicing
  properties:
  - type: Documentation
    url: https://www.freshbooks.com/api/webhooks
  - type: AsyncAPI
    url: https://raw.githubusercontent.com/api-evangelist/freshbooks/refs/heads/main/asyncapi/freshbooks-webhooks-asyncapi.yml
- aid: freshbooks:freshbooks-auth-api
  name: FreshBooks Auth API
  description: The Auth API from FreshBooks — 1 operation(s) for auth.
  humanURL: https://www.freshbooks.com/api/start
  baseURL: https://api.freshbooks.com
  tags:
  - Auth
  properties:
  - type: OpenAPI
    url: openapi/freshbooks-auth-api-openapi.yml
- aid: freshbooks:freshbooks-clients-api
  name: FreshBooks Clients API
  description: The Clients API from FreshBooks — 2 operation(s) for clients.
  humanURL: https://www.freshbooks.com/api/start
  baseURL: https://api.freshbooks.com
  tags:
  - Clients
  properties:
  - type: OpenAPI
    url: openapi/freshbooks-clients-api-openapi.yml
- aid: freshbooks:freshbooks-estimates-api
  name: FreshBooks Estimates API
  description: The Estimates API from FreshBooks — 1 operation(s) for estimates.
  humanURL: https://www.freshbooks.com/api/start
  baseURL: https://api.freshbooks.com
  tags:
  - Estimates
  properties:
  - type: OpenAPI
    url: openapi/freshbooks-estimates-api-openapi.yml
- aid: freshbooks:freshbooks-expenses-api
  name: FreshBooks Expenses API
  description: The Expenses API from FreshBooks — 2 operation(s) for expenses.
  humanURL: https://www.freshbooks.com/api/start
  baseURL: https://api.freshbooks.com
  tags:
  - Expenses
  properties:
  - type: OpenAPI
    url: openapi/freshbooks-expenses-api-openapi.yml
- aid: freshbooks:freshbooks-invoices-api
  name: FreshBooks Invoices API
  description: The Invoices API from FreshBooks — 2 operation(s) for invoices.
  humanURL: https://www.freshbooks.com/api/start
  baseURL: https://api.freshbooks.com
  tags:
  - Invoices
  properties:
  - type: OpenAPI
    url: openapi/freshbooks-invoices-api-openapi.yml
- aid: freshbooks:freshbooks-items-api
  name: FreshBooks Items API
  description: The Items API from FreshBooks — 1 operation(s) for items.
  humanURL: https://www.freshbooks.com/api/start
  baseURL: https://api.freshbooks.com
  tags:
  - Items
  properties:
  - type: OpenAPI
    url: openapi/freshbooks-items-api-openapi.yml
- aid: freshbooks:freshbooks-payments-api
  name: FreshBooks Payments API
  description: The Payments API from FreshBooks — 1 operation(s) for payments.
  humanURL: https://www.freshbooks.com/api/start
  baseURL: https://api.freshbooks.com
  tags:
  - Payments
  properties:
  - type: OpenAPI
    url: openapi/freshbooks-payments-api-openapi.yml
- aid: freshbooks:freshbooks-projects-api
  name: FreshBooks Projects API
  description: The Projects API from FreshBooks — 1 operation(s) for projects.
  humanURL: https://www.freshbooks.com/api/start
  baseURL: https://api.freshbooks.com
  tags:
  - Projects
  properties:
  - type: OpenAPI
    url: openapi/freshbooks-projects-api-openapi.yml
- aid: freshbooks:freshbooks-tasks-api
  name: FreshBooks Tasks API
  description: The Tasks API from FreshBooks — 1 operation(s) for tasks.
  humanURL: https://www.freshbooks.com/api/start
  baseURL: https://api.freshbooks.com
  tags:
  - Tasks
  properties:
  - type: OpenAPI
    url: openapi/freshbooks-tasks-api-openapi.yml
- aid: freshbooks:freshbooks-taxes-api
  name: FreshBooks Taxes API
  description: The Taxes API from FreshBooks — 1 operation(s) for taxes.
  humanURL: https://www.freshbooks.com/api/start
  baseURL: https://api.freshbooks.com
  tags:
  - Taxes
  properties:
  - type: OpenAPI
    url: openapi/freshbooks-taxes-api-openapi.yml
- aid: freshbooks:freshbooks-timeentries-api
  name: FreshBooks TimeEntries API
  description: The TimeEntries API from FreshBooks — 1 operation(s) for timeentries.
  humanURL: https://www.freshbooks.com/api/start
  baseURL: https://api.freshbooks.com
  tags:
  - TimeEntries
  properties:
  - type: OpenAPI
    url: openapi/freshbooks-timeentries-api-openapi.yml
common:
- type: AgenticAccess
  url: agentic-access/freshbooks-agentic-access.yml
- type: DomainSecurity
  url: security/freshbooks-domain-security.yml
- type: Authentication
  url: authentication/freshbooks-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/freshbooks
- type: Website
  url: https://www.freshbooks.com
- type: Documentation
  url: https://www.freshbooks.com/api/start
- type: DeveloperPortal
  url: https://www.freshbooks.com/developers
- type: Signup
  url: https://www.freshbooks.com/signup
- type: Pricing
  url: https://www.freshbooks.com/pricing
- type: Login
  url: https://my.freshbooks.com/
- type: Support
  url: https://support.freshbooks.com/
- type: Blog
  url: https://www.freshbooks.com/blog
- type: GitHubOrganization
  url: https://github.com/freshbooks
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com