Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Exemplar 4 Complete, well-documented, and agent-ready

Xero Accounting APIThe Accounting API from Xero — 140 operation(s) for accounting.84.5 Revolut Accounting APIManage [accounting settings](https://business.revolut.com/settings/accounting) for your business that can b...70.0 Lili MCP ServerRemote, OAuth 2.0 protected Model Context Protocol server (Streamable HTTP, MCP spec 2025-03-26) exposing 4...68.7 Infor CloudSuite Financials APIInfor CloudSuite Financials APIs provide integration with general ledger, accounts payable, accounts receiv...68.3

Strong 16 Solid coverage with minor gaps

Oracle Fusion Cloud Financials REST APIREST APIs for viewing and managing data stored in Oracle Fusion Cloud Financials, including ERP processes, ...65.9 Visma Business NXT GraphQL APIGraphQL API for Business NXT, Visma's ERP for mid-market Nordic customers. Two endpoints share one schema: ...64.7 Unified.to Accounting APIThe accounting API from Unified.to — 38 operation(s) for accounting.63.9 Deel Accounting APIThe accounting API from Deel — 7 operation(s) for accounting.63.0 Zoho BooksThe Zoho Books API allows you to perform all the operations that you do with the web client. It is built us...61.9 Intuit APIsIntuit APIs provide developers with access to a wide range of services and functionalities to help them bui...57.7 QuickBooks Custom Fields APIThe QuickBooks Custom Fields API is a premium API that provides programmatic access to custom field definit...57.7 QuickBooks Desktop APIThe QuickBooks Desktop API allows developers to integrate with QuickBooks Desktop applications using qbXML ...57.7 QuickBooks Projects APIThe QuickBooks Projects API is a premium API that provides programmatic access to project data within Quick...57.7 QuickBooks Sales Tax APIThe QuickBooks Sales Tax API is a premium API that provides programmatic access to the automated sales tax ...57.7 Workday Accounting APIEndpoints for managing accounting journals.55.9 Yardi Virtuoso Connector (MCP)Yardi's first-party Model Context Protocol server, announced in early access on 2025-09-10 and described as...55.7 Yardi Voyager Standard InterfacesThe documented family of Voyager web-service interfaces that Yardi Canada clients and their vendors integra...55.7 Thomson Reuters Checkpoint APICheckpoint Search API provides access to Thomson Reuters Checkpoint tax and accounting research content inc...55.5 MRI Information Exchange (MIX) APIAn open and connected ecosystem of secure REST APIs built by MRI and its partners that enables controlled d...54.7 DealHub Accounting APIThe Accounting API from DealHub — 7 operation(s) for accounting.54.3

Developing 26 Usable, with meaningful gaps to close

AccountsIQ Integration API 1.1The legacy AIQ SOAP 1.1 integration web service, still published and supported alongside 2.0. 217 operation...54.2 AccountsIQ Integration API 2.0The current AIQ SOAP 1.1 integration web service. 219 operations covering customers, suppliers, stock items...54.2 Open Poker Accounting APIThe Accounting API from Open Poker — 1 operation(s) for accounting.53.2 Proactis Accounting APIConfigure the accounting structures that spend is coded against — departments, cost centers, cost accounts ...52.5 ConnexPay Accounting APIThe Accounting API from ConnexPay — 2 operation(s) for accounting.52.0 Maesn Accounting APIThe accounting API from Maesn — 91 operation(s) for accounting.51.7 Conta Azul APIREST/JSON API for the Conta Azul ERP, organized by functional area (Financeiro, Cobranças, Baixas, Vendas, ...50.9 Autopay Accounting APIThe Autopay Accounting API provides Autopay invoicing data to external accounting and ERP systems, enabling...50.6 Autopay Accounting APIInvoice export for accounting and ERP reconciliation50.6 Deskera Books APIREST API for Deskera Books, the cloud ERP and accounting product — contacts, products, accounts, invoices, ...50.1 DualEntry Public APIREST API for programmatic access to an organization's accounting data across setup (accounts, items, classi...49.7 Factorial Finance and Banking APIBank accounts, transactions, ledger accounts, journal entries, tax rates and tax types, cost centers, cost ...48.4 Dynamics 365 Finance & Operations APIAPI for managing financial operations, accounting, budgeting, and enterprise resource planning.47.8 Aerones Accounting APIThe accounting API from Aerones — 11 operation(s) for accounting.47.0 Defacto Accounting APIThe Accounting API from Defacto — 1 operation(s) for accounting.45.3 Botkeeper Platform APIBotkeeper's partner platform API. The company does not publish a reference, a portal or a specification for...44.7 Dealhubio Accounting APIThe Accounting API from Dealhubio — 7 operation(s) for accounting.43.8 Open Connected Banking PlatformOpen's flagship SMB neobanking application. Connects one or more partner-bank current accounts (ICICI, SBI,...42.3 Expense Allocations APIManage allocation of expenses across multiple cost centers, projects, departments, or GL accounts. Supports...42.2 Mercado Pago Reports APIGenerate, configure, and download release / settlement / account-money reports for reconciliation and accou...41.8 Sage 200 APISage 200 API provides REST access to Sage 200 Standard and Professional business management data including ...41.8 Sage 50 Accounts APISage 50 Accounts API enables desktop accounting integration for UK small businesses. Provides access to acc...41.8 Sage Intacct APISage Intacct provides both REST and XML APIs for advanced financial management including multi-entity conso...41.8 Viewpoint Construction ERP APIsThe Viewpoint suite of construction ERP APIs includes Jobpac Connect, Spectrum, and Vista. These REST and w...41.1 Quorum Royalty Accounting APIQuorum Royalty Accounting API enables access to royalty payment calculations, owner statements, suspense ma...39.6 FreeAgent REST APIRESTful API for the FreeAgent cloud accounting platform. Provides full access to invoices, estimates, conta...39.3

Thin 27 Limited public surface area

bexio Accounting APIThe Accounting API from bexio — 4 operation(s) for accounting.38.7 UtilityAPI Accounting APICustomer billing accounts and billing summaries38.7 Rutter Accounting APIThe Rutter Accounting API provides a unified interface to read and write data to all major accounting platf...35.6 Rutter Accounting APIAccounting data across platforms35.6 Hnry Platform APIThe REST API behind the Hnry app. It backs the Hnry iOS/Android clients and the published Hnry Zapier integ...35.3 Zenskar APIZenskar's REST API for billing, contracts, usage metering, invoicing, payments, credit notes, and accountin...35.2 Qualia Accounting and Escrow APIPull accounting and escrow data across files for custom reporting and executive-level performance dashboard...34.7 QuickBooksREST API for managing QuickBooks Online accounting entities including Customer, Vendor, Employee, Item, Inv...34.2 QuickBooks Online Accounting APIREST API for the QuickBooks Online accounting platform, exposing accounting objects such as Invoice, Custom...34.2 AlayaCare Accounting APIREST API for financial operations within AlayaCare, including billing records, invoices, and accounting dat...33.7 Propertyware Accounting APIResources providing access to accounting data such as general ledger accounts and financial transactions.31.8 BitPay Ledgers APIAccess account balance records by currency and track individual ledger entries.31.3 FreshBooks REST APIREST API for FreshBooks providing CRUD access to clients, invoices, estimates, expenses, projects, time ent...31.2 FreshBooks Webhooks (Callbacks API)Event delivery surface for the FreshBooks Callbacks API. Subscribers register an HTTPS endpoint, complete a...31.2 Exact Online REST / OData APIREST and OData API (v1) for Exact Online covering financials, sales, purchasing, inventory, HRM, CRM, proje...31.0 AppFolio Stack APIPartner integration API for the AppFolio Performance Platform, covering resources such as attachments, bank...29.9 Lido Reward History APIRead-only HTTP API returning a per-address stETH reward history including USD/EUR/GBP fiat conversions, wit...29.0 Picker Accounting APIThe accounting API from Picker — 1 operation(s) for accounting.28.6 Wave Financial GraphQL APIGraphQL API providing programmatic access to Wave accounting features including businesses, customers, invo...28.1 Revelator Accounting APIRights contracts and payee management.27.3 Zoho Invoice APIREST API for managing organizations, contacts, items, invoices, estimates, credit notes, recurring invoices...27.2 Holded Accounting APIThe Accounting API from Holded — 1 operation(s) for accounting.27.1 Holded REST APIREST API for managing invoicing, contacts, products, accounting, projects, employees, and CRM records insid...27.1 Murex Accounting APIAccounting entries and journal operations26.8 Numeric MCP APIOAuth-protected Model Context Protocol server exposing Numeric's close-automation toolkit to AI agents. Str...26.7 Sage Intacct REST APIModern REST API for Sage Intacct using OAuth 2.0 Bearer token authentication. Provides standard HTTP verbs ...26.3 Sage Intacct XML APILegacy XML API providing programmatic access to general ledger, accounts payable, accounts receivable, orde...26.3

Emerging 14 Early or largely undocumented

RealPage Financial Management & AccountingAccounting and financial management products covering general ledger, payables, receivables, and reporting ...25.3 Revert Accounting APIUnified accounting operations across Xero and QuickBooks24.8 MYOB Business APIREST-based cloud API for MYOB AccountRight, MYOB Essentials, and MYOB Business. Provides endpoints for mana...23.3 TenantCloud APIREST API for managing rental properties, tenants, leases, maintenance requests, accounting, and online rent...23.2 RightRev REST APIRightRev's REST (and GraphQL) API for revenue recognition — transaction ingestion (orders, invoices, events...22.9 Sage Accounting v3.1 REST APIREST API for Sage Business Cloud Accounting providing access to contacts, sales invoices, sales credit note...22.0 Clear Books REST APIRESTful API for integrating with Clear Books accounting software to manage invoices, payments, contacts, ba...21.5 Billecta Accounting APIThe Accounting API from Billecta — 3 operation(s) for accounting.20.7 Tryton REST APIRESTful API for Tryton ERP providing access to all business modules including financial accounting, stock/i...17.5 Rent Manager Web APIThe Rent Manager Web API (WAPI12) is a RESTful API that provides both read and write access to the Rent Man...16.9 Certinia Accounting (ERP) APICertinia Accounting Apex API (namespace prefix CODAAPI) for core financials - sales and purchase invoices, ...13.0 AutoLeap Payments & Purchasing APIRead payments taken against repair orders for reconciliation and financial reporting, plus read purchase or...12.2 Dealertrack Opentrack DMS Data APIReal-time, bidirectional read access to Dealertrack DMS data through the Opentrack third-party integration ...11.3 Dealertrack Opentrack DMS Write-Back APIReal-time, bidirectional write access to the Dealertrack DMS through Opentrack. Certified vendors can push ...11.3

Minimal 5 Almost no public developer surface

Reynolds Accounting APIDealership accounting data in the Reynolds DMS - general ledger entries, accounts receivable and payable, c...10.9 Calypso Post-Trade Processing APIEnables integration with Calypso back-office processing capabilities including trade comparison, netting, s...10.8 Buildium Accounting & General Ledger APIManages chart of accounts, journal entries, bills, bill payments, bank accounts, and general-ledger transac...8.0 Airbase GL & Accounting Sync APIRead and push general-ledger coding and accounting records so spend stays in sync with the ERP/GL. Airbase ...7.8 ResWare Accounting APIModeled logical service area for escrow accounting - trust ledgers, receipts and disbursements, reconciliat...6.8

Companies reaching this through an API (37)

These companies publish an API, specification or operation carrying “Accounting” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.

Score breakdown

Frequency

68.5

log-scaled weighted occurrences

Breadth

5.4

spread across providers

Quality lift

28.0

mean composite of providers using it

Cohesion

15.1

strength of nearest seed neighbor

Where this tag sits

242 providers carry this tag directly, and 451 counting the 5 narrower tags below and the 3 beneath them — 209 more to reach.

Fintech broader Finance broader General Ledger 7 providers Accounts Payable 71 providers Accounts Receivable 49 providers Bookkeeping 64 providers Invoicing 175 providers

Where this tag comes from

Provider tag244

Api tag92

Openapi tag16

Openapi op tag54

Markets provisional

Kin Score markets whose measured providers carry this tag. Share is the fraction of the market's measured providers that carry it — it describes the market, not this tag.

Market	Share of the market's providers
Accounting and Finance Ops	72%
E-invoicing and Tax Compliance (certified operators)	36%
Xero App Store (SMB finance, payroll, inventory and invoicing apps built on Xero, by region)	20%

Cohort brief

Auto-generated

The 235 providers in the APIs.io catalog tagged Accounting, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers

235

of 242 in the catalog

Mean Kin Score

27.3

+5.1 vs catalog 22.2

Mean Agent Readiness

15.6

+3.6 vs catalog 12

Spread

0–84.5

median 23.7 · σ 16.8

How the 235 split by band

Exemplar 5Strong 9Developing 48Thin 51Emerging 82Minimal 40

Facet averages, against the whole catalog

Facet	This cohort	Catalog	Difference	Scored
Access Clarity	35.3	23.9	+11.4	235
Operational Transparency	17	13	+4	235
Discoverability	61.5	57.9	+3.6	235
Contract Quality	20.8	17.2	+3.6	235
Developer Ergonomics	26.1	23.2	+2.9	235
Contract Governance	7.6	6.5	+1.1	235

A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.

What this cohort publishes

Artifact	This cohort	Catalog	Difference
MCP server (any)	22%	13%	+9
MCP server (first-party)	20%	12%	+8
Agent Skills	0%	0%	0
OAuth scopes	18%	11%	+7
Security	98%	98%	0
Arazzo workflows	3%	2%	+1
Governance rules	17%	16%	+1

mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.

Top by Kin Score

1 Xero 84.5
2 Merge 72.3
3 Karbon 71.2
4 Avalara 69.9
5 Lili 68.7
6 Visma 64.7
7 Agave 59.8
8 Spendesk 59.8
9 FlowAccount 59.3
10 Intuit 57.7

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Tools for tags

7 MCP tools reach this

find_tagsBrowse and filter every tag in the catalog.
get_cohortThis tag as a scored cohort — every provider carrying it, with scores.
cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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The distribution (Pro)

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Accounting

Providers using this tag (242)

APIs with this tag (92)