Wave Financial website screenshot

Wave Financial

Free accounting software for small businesses with a GraphQL API for managing invoices, estimates, customers, products, accounts, and financial reporting. The API uses OAuth 2.0 for authentication and supports operations for businesses, customers, invoices, transactions, vendors, taxes, and webhooks.

Wave Financial publishes 1 API on the APIs.io network. Tagged areas include Accounting, Invoicing, Financial, Small Business, and Bookkeeping.

Wave Financial’s developer surface includes documentation, engineering blog, pricing, and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub
33.6/100 thin ▲ 7.6 Agent 19/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreemium
1 APIs
AccountingInvoicingFinancialSmall BusinessBookkeepingPayments

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 33.6/100 · thin
Contract Quality 12.0 / 25
Developer Ergonomics 2.2 / 20
Commercial Clarity 10.0 / 20
Operational Transparency 6.8 / 13
Governance 0.0 / 12
Discoverability 6.9 / 10
Agent readiness — 19/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 10
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 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
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/wave-financial: 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 1

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

Wave Financial GraphQL API

GraphQL API providing programmatic access to Wave accounting features including businesses, customers, invoices, products, accounts, transactions, vendors, taxes, and webhooks.

GraphQL 1

GraphQL schemas published by this provider.

Wave Financial GraphQL API

Wave Financial provides a public GraphQL API for programmatic access to its small-business accounting and invoicing platform. The API covers core business data including busines...

GRAPHQL

Pricing Plans 1

Published pricing tiers and plan structures.

Wave Financial Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Wave Financial Rate Limits

3 limits

RATE LIMITS

FinOps 1

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

Wave Financial Finops

FINOPS

Security Posture 1

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

Wave Financial Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrg
GitHubOrg

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 2

Status, limits, changes, and where to get help

StatusPage
StatusPage
 RateLimits
RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing
Pricing
 Plans
Plans
 FinOps
FinOps

Company 3

The organization behind the API

Website
Website
 LinkedIn
LinkedIn
 Blog
Blog

Other 1

Properties that don't map to a standard resource type

X
X

Source (apis.yml)

apis.yml Raw ↑ 
aid: wave-financial
name: Wave Financial
description: Free accounting software for small businesses with a GraphQL API for managing invoices, estimates, customers,
  products, accounts, and financial reporting. The API uses OAuth 2.0 for authentication and supports operations for businesses,
  customers, invoices, transactions, vendors, taxes, and webhooks.
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/wave-financial.png
url: https://raw.githubusercontent.com/api-evangelist/wave-financial/refs/heads/main/apis.yml
created: 2026-06-13
modified: 2026-06-13
specificationVersion: '0.19'
tags:
- Accounting
- Invoicing
- Financial
- Small Business
- Bookkeeping
- Payments
apis:
- aid: wave-financial:wave-financial-graphql-api
  name: Wave Financial GraphQL API
  description: GraphQL API providing programmatic access to Wave accounting features including businesses, customers, invoices,
    products, accounts, transactions, vendors, taxes, and webhooks.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://developer.waveapps.com/hc/en-us
  baseURL: https://gql.waveapps.com/graphql/public
  tags:
  - Accounting
  - GraphQL
  - Invoicing
  - Customers
  - Transactions
  properties:
  - type: Documentation
    url: https://developer.waveapps.com/hc/en-us/categories/360001114072-Documentation
  - type: Authentication
    url: https://developer.waveapps.com/hc/en-us/articles/360019493652-OAuth-Guide
  - type: GraphQL
    url: https://developer.waveapps.com/hc/en-us/articles/360018570992-Building-on-GraphQL
  - type: Playground
    url: https://developer.waveapps.com/hc/en-us/articles/360018937431-API-Playground
  - url: graphql/wave-financial-graphql.md
    type: GraphQL
common:
- type: DomainSecurity
  url: security/wave-financial-domain-security.yml
- type: Website
  url: https://www.waveapps.com
- type: Documentation
  url: https://developer.waveapps.com/hc/en-us
- type: GitHubOrg
  url: https://github.com/waveapps
- type: LinkedIn
  url: https://www.linkedin.com/company/waveapps
- type: Blog
  url: https://www.waveapps.com/blog
- type: Pricing
  url: https://www.waveapps.com/pricing
- type: StatusPage
  url: https://status.waveapps.com/
- type: X
  url: https://twitter.com/wave_financial
- type: Plans
  url: plans/wave-financial-plans-pricing.yml
- type: RateLimits
  url: rate-limits/wave-financial-rate-limits.yml
- type: FinOps
  url: finops/wave-financial-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com