Zoho Books

Zoho Books is online accounting software for small and growing businesses that handles invoicing, expenses, banking, projects, inventory, vendor bills, reporting, and end-to-end GST/VAT compliance. It is part of the Zoho Finance suite and integrates with the rest of the Zoho One platform alongside payment gateways, banks, and tax authorities. The Zoho Books REST API exposes the full accounting data model — contacts, invoices, estimates, expenses, bills, banking, items, taxes, and reports — using OAuth 2.0 (Zoho-oauthtoken) for authentication and per-region data center base URLs.

Zoho Books publishes 4 API contracts indexed on the APIs.io network, including Contacts API, Invoices API, Items API, and 1 more. Tagged areas include Accounting, Bookkeeping, Invoicing, Expenses, and Banking.

The Zoho Books catalog on APIs.io includes 1 Spectral governance ruleset.

Zoho Books’ developer surface includes documentation, pricing, signup flow, support, engineering blog, developer console, and 15 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

46.8/100 developing ▬ flat Agent 19/100 agent aware saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemium

1 published contract

Accounting Bookkeeping Invoicing Expenses Banking Small Business GST VAT Zoho

What this lets a business do 2

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Financial Management

BC-200

Invoices

POST /invoices POST /invoices/{invoice_id}/email POST /invoices/{invoice_id}/status/void

Customer Relationship Management

BC-420

Contacts

POST /contacts POST /contacts/{contact_id}/active

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 46.8/100 · developing

Contract Quality 8.7 / 19

Developer Ergonomics 5.4 / 15

Access Clarity 12.1 / 15

Operational Transparency 3.2 / 10

Contract Governance 1.2 / 9

Discoverability 5.0 / 8

Regulatory Posture 3.1 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 19/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 6 / 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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Banking & Open Finance regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

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.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented) Ask about this →

10 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 46.3 — up to +13.4 composite points Ask about this →
Developer Ergonomics scores 35.7 — up to +12.9 composite points Ask about this →
Contract Governance scores 13.6 — up to +10.4 composite points Ask about this →

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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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 the provider profile at artifacts.apis.io/zoho-books/apis.yml: open an issue on github.com/api-evangelist/zoho-books to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
E-invoicing and Tax Compliance (certified operators)	builds-on	11.0	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 4

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

Zoho Books Contacts API

The Contacts API from Zoho Books — 4 operation(s) for contacts.

Zoho Books Invoices API

The Invoices API from Zoho Books — 5 operation(s) for invoices.

Zoho Books Items API

The Items API from Zoho Books — 2 operation(s) for items.

Zoho Books Organizations API

The Organizations API from Zoho Books — 1 operation(s) for organizations.

Open Collections 4

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

Zoho Books Contacts API

OPEN COLLECTION

Zoho Books Invoices API

OPEN COLLECTION

Zoho Books Items API

OPEN COLLECTION

Zoho Books Organizations API

OPEN COLLECTION

Zoho Books API pricing

Prices published by Zoho Books, read 2026-09-20 from www.zoho.com/us/books/pricing/.

Plan	Price
FREE	$0 Includes: 1 User + 1 Accountant; Email Support; up to 1,000 invoices annually
STANDARD	$20 Includes: 3 Users; API Access; up to 5,000 invoices annually
STANDARD (billed annually)	$15 Includes: 3 Users
PROFESSIONAL	$50 Includes: 5 Users
PROFESSIONAL (billed annually)	$40 Includes: 5 Users
PREMIUM	$70 Includes: 10 Users
PREMIUM (billed annually)	$60 Includes: 10 Users
ELITE	$150 Includes: 10 Users

All 17 plans, limits and sources →

Billed by: price/org/month · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Zoho Books Plans Pricing

17 plans

PLANS

Zoho Books Price Estimates

0 plans

PLANS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Zoho Books

SLA

Terms of Service 1

What its API terms permit and prohibit, quoted from its own page.

Zoho Books

9 quoted statements, read from Zoho Books's own page on 2026-11-10.

TERMS

Privacy & Data 1

Its role, the data it processes, retention and transfers, quoted from its own privacy page.

Zoho Books

24 quoted statements, read from Zoho Books's own page on 2026-11-10.

PRIVACY

Eligibility 1

Who may sign up and where, quoted from its own terms.

Zoho Books

3 quoted statements, read from Zoho Books's own page on 2026-11-10.

ELIGIBILITY

Data License 1

How its data and outputs may be reused, quoted from its own terms.

Zoho Books

1 quoted statement, read from Zoho Books's own page on 2026-11-10.

LICENSE

FinOps 1

Cost, billing, and metering signals for API financial operations.

Zoho Books Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

Zoho Books API Rules

40 rules · 38 error-severity 1 warn-severity 1 info-severity

SPECTRAL

Security Posture 2

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

Zoho Books Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Zoho Books Vulnerability Disclosure

security.txt · contact published

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

Signup

Signup

Login

Console

Console

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

Commercial 6

Pricing, plans, and the legal terms of use

Plans

Pricing

PrivacyPolicy

TermsOfService

UsageTerms

DataLicense

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Other 3

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

DataProcessing

DataProcessing

Eligibility

Eligibility

Source (apis.yml)

aid: zoho-books
name: Zoho Books
description: Zoho Books is online accounting software for small and growing businesses that handles invoicing, expenses, banking,
  projects, inventory, vendor bills, reporting, and end-to-end GST/VAT compliance. It is part of the Zoho Finance suite and
  integrates with the rest of the Zoho One platform alongside payment gateways, banks, and tax authorities. The Zoho Books
  REST API exposes the full accounting data model — contacts, invoices, estimates, expenses, bills, banking, items, taxes,
  and reports — using OAuth 2.0 (Zoho-oauthtoken) for authentication and per-region data center base URLs.
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: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/zoho-books.png
tags:
- Accounting
- Bookkeeping
- Invoicing
- Expenses
- Banking
- Small Business
- GST
- VAT
- Zoho
url: https://raw.githubusercontent.com/api-evangelist/zoho-books/refs/heads/main/apis.yml
created: '2026-05-11'
modified: '2026-05-11'
specificationVersion: '0.23'
apis:
- aid: zoho-books:zoho-books-contacts-api
  name: Zoho Books Contacts API
  description: The Contacts API from Zoho Books — 4 operation(s) for contacts.
  humanURL: https://www.zoho.com/books/api/v3/introduction/
  baseURL: https://www.zohoapis.com/books/v3
  tags:
  - Contacts
  properties:
  - type: OpenAPI
    url: openapi/zoho-books-contacts-api-openapi.yml
  - type: Documentation
    url: https://www.zoho.com/books/api/v3/introduction/
  - type: Authentication
    url: https://www.zoho.com/books/api/v3/oauth/
- aid: zoho-books:zoho-books-invoices-api
  name: Zoho Books Invoices API
  description: The Invoices API from Zoho Books — 5 operation(s) for invoices.
  humanURL: https://www.zoho.com/books/api/v3/introduction/
  baseURL: https://www.zohoapis.com/books/v3
  tags:
  - Invoices
  properties:
  - type: OpenAPI
    url: openapi/zoho-books-invoices-api-openapi.yml
  - type: Documentation
    url: https://www.zoho.com/books/api/v3/introduction/
  - type: Authentication
    url: https://www.zoho.com/books/api/v3/oauth/
- aid: zoho-books:zoho-books-items-api
  name: Zoho Books Items API
  description: The Items API from Zoho Books — 2 operation(s) for items.
  humanURL: https://www.zoho.com/books/api/v3/introduction/
  baseURL: https://www.zohoapis.com/books/v3
  tags:
  - Item
  tags_raw:
  - Items
  properties:
  - type: OpenAPI
    url: openapi/zoho-books-items-api-openapi.yml
  - type: Documentation
    url: https://www.zoho.com/books/api/v3/introduction/
  - type: Authentication
    url: https://www.zoho.com/books/api/v3/oauth/
- aid: zoho-books:zoho-books-organizations-api
  name: Zoho Books Organizations API
  description: The Organizations API from Zoho Books — 1 operation(s) for organizations.
  humanURL: https://www.zoho.com/books/api/v3/introduction/
  baseURL: https://www.zohoapis.com/books/v3
  tags:
  - Organization
  tags_raw:
  - Organizations
  properties:
  - type: OpenAPI
    url: openapi/zoho-books-organizations-api-openapi.yml
  - type: Documentation
    url: https://www.zoho.com/books/api/v3/introduction/
  - type: Authentication
    url: https://www.zoho.com/books/api/v3/oauth/
common:
- type: Plans
  url: plans/zoho-books-plans-pricing.yml
- type: CapabilityMap
  url: capabilities/zoho-books-capability-edges.yml
  name: Zoho Books Business Capability Map
- type: VulnerabilityDisclosure
  url: security/zoho-books-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/zoho-books-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/zoho
- type: LinkedIn
  url: https://www.linkedin.com/showcase/zoho-books
- type: Website
  url: https://www.zoho.com/books/
- type: Documentation
  url: https://www.zoho.com/books/api/v3/introduction/
- type: Pricing
  url: https://www.zoho.com/books/pricing/
- type: Signup
  url: https://www.zoho.com/books/signup/
- type: Login
  url: https://books.zoho.com/app/login
- type: Support
  url: https://www.zoho.com/books/support/
- type: Blog
  url: https://www.zoho.com/books/blog/
- type: StatusPage
  url: https://status.zoho.com/
- type: PrivacyPolicy
  url: https://www.zoho.com/privacy.html
- type: TermsOfService
  url: https://www.zoho.com/terms.html
- type: Console
  url: https://api-console.zoho.com/
- type: UsageTerms
  url: terms/zoho-books-terms-of-service.yml
- type: DataProcessing
  url: privacy/zoho-books-privacy-policy.yml
- type: Eligibility
  url: eligibility/zoho-books-eligibility.yml
- type: DataLicense
  url: data-license/zoho-books-data-license.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-parent: zoho
x-relationship: product

Zoho Books API — frequently asked questions

Does Zoho Books have an API?

Yes. APIs.io lists 4 APIs from Zoho Books, including Zoho Books Contacts API, Zoho Books Invoices API and Zoho Books Items API, and 1 more.

Is there an OpenAPI specification for the Zoho Books API?

Yes. APIs.io indexes 4 OpenAPI specifications for Zoho Books, each linked for download from this page.

How do I authenticate with the Zoho Books API?

Zoho Books uses bearer-token authentication.

How much does the Zoho Books API cost?

Zoho Books publishes its prices; its FREE plan is $0 as of 2026-09-20. APIs.io lists 17 pricing plans for Zoho Books, with each plan's price, limits and inclusions under Pricing on this page.

Is the Zoho Books API ready for AI agents?

Zoho Books has a Kin Score of 46.8 out of 100 (developing) and an Agent Readiness score of 18.9 (agent-aware), scored by API Evangelist on 2026-11-13.

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