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

33.0/100 thin ▬ flat Agent 16/100 agent aware Full breakdown ↓
scored 2026-08-25 · rubric v0.14.0

AccessFreemium

1 APIs

Accounting Invoicing Financial Small Business Bookkeeping Payments

Kin Score

Kin Score How this is scored →
scored 2026-08-25 · rubric v0.14.0

Composite quality — 33.0/100 · thin

Contract Quality 8.8 / 21

Developer Ergonomics 2.0 / 17

Access Clarity 8.5 / 17

Operational Transparency 5.8 / 11

Contract Governance 0.0 / 10

Discoverability 5.8 / 9

Regulatory Posture 1.4 / 15

Agent readiness — 16/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

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

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Surface 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Payments 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.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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.

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.

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

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

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: '0.23'
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
  - Transaction
  tags_raw:
  - 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

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Wave Financial

Kin Score

APIs 1

Wave Financial GraphQL API

GraphQL 1

Wave Financial GraphQL API

Pricing Plans 1

Wave Financial Plans Pricing

Rate Limits 1

Wave Financial Rate Limits

FinOps 1

Wave Financial Finops

Security Posture 1

Wave Financial Domain Security

Resources

Documentation 1

Build 1

Access & Security 1

Operate 2

Commercial 3

Company 3

Other 1

Source (apis.yml)

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