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 is listed with 1 API on the APIs.io network. Tagged areas include Accounting, Invoicing, Finance, Small Business, and Bookkeeping.

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

🌐 Visit website 📡 Profile data on GitHub

26.9/100 thin ▬ flat Agent 16/100 agent aware Front door AI 2/6 trace Heartbeat 0/100 dormant saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemium

1 API

Accounting Invoicing Finance Small Business Bookkeeping Payments

Kin Score

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

Composite quality — 26.9/100 · thin

Contract Quality 8.4 / 21

Developer Ergonomics 5.3 / 17

Access Clarity 2.5 / 17

Operational Transparency 2.9 / 11

Contract Governance 0.0 / 10

Discoverability 5.6 / 9

Regulatory Posture 0.8 / 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 10 / 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 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 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.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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/.

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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 →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link 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):

Access Clarity scores 14.9 — up to +17.0 composite points Ask about this →
Contract Quality scores 39.4 — up to +15.2 composite points Ask about this →
Developer Ergonomics scores 31.0 — up to +13.8 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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/wave-financial/apis.yml: open an issue on github.com/api-evangelist/wave-financial 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
Amazon Seller Ecosystem (Selling Partner Appstore, Amazon Ads partners)	builds-on	30.3	-	-
Canada RPAA Payment Service Providers (Bank of Canada registry + Payments Canada)	builds-on	30.3	-	-
Raycast Store Extensions (first-party publishers + community-wrapped products)	builds-on	30.3	-	-
IFTTT Services (service publishers)	builds-on	30.3	-	-

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.

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

Wave Financial API pricing

Not yet checked against Wave Financial's own pricing page. Compiled by API Evangelist on 2026-06-13; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Starter	Free
Pro	$19
Wave Advisors	$199

Plan details, limits and sources →

Rate limits

Per Access Token Minute Limit: 60 1 minute
Per Application Daily Limit: 5000 24 hours
Name Verification Endpoint Limit: 30 5 minutes

Compiled by API Evangelist, not yet checked against Wave Financial's documentation. Rate-limit details →

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

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.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - 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/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
- Finance
- Small Business
- Bookkeeping
- Payments
tags_raw:
- 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

Wave Financial API — frequently asked questions

Does Wave Financial have an API?

Yes. APIs.io lists 1 API from Wave Financial, including Wave Financial GraphQL API.

How do I authenticate with the Wave Financial API?

Wave Financial uses bearer-token authentication.

How much does the Wave Financial API cost?

APIs.io lists 3 pricing plans for Wave Financial, with each plan's price, limits and inclusions under Pricing on this page.

Is the Wave Financial API ready for AI agents?

Wave Financial has a Kin Score of 26.9 out of 100 (thin) and an Agent Readiness score of 16.1 (agent-aware), scored by API Evangelist on 2026-11-13.

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