emerging · 0.0 market domain

Tax

Score 23.3 / 100 90 providers +25 via APIs 56 APIs Search apis.io →
Variants seen in the corpus: Taxtax

Providers using this tag (90)

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Strong 2 Solid coverage with minor gaps
IntuitAccountingCustom FieldsFinancialFinancial-Services1 API62.7FlowAccountCompanyAccountingInvoicingPayroll1 API57.2
Developing 16 Usable, with meaningful gaps to close
CadanaCompanyPayrollPaymentsGlobal Payroll5 APIs51.2SwapCompanyE-CommerceCross-BorderCustoms6 APIs49.5Check TechnologiesCompanyPayrollEmbedded FinanceFintech1 API48.7inFaktCompanyAccountingInvoicingFintech1 API46.8HMRC UK Tax AuthorityGovernmentMaking Tax DigitalRegulatory1 API45.6MileIQCompanyConsumerMileage TrackingExpense Management1 API44.7Workday PayrollCompensationEnterpriseHuman ResourcesPayroll5 APIs43.8FonoaVATGSTE-Invoicing4 APIs43.3VatstackVATValidationEU1 API42.9KPMGConsultingAuditLegal1 API42.1ContalinkCompanyAccountingBookkeepingPayroll1 API41.3PrestaShopE-CommerceOpen-SourceProductOrder2 APIs41.3Planomy Tax DataFinanceOpen DataRetirement1 API40.5PinwheelEmploymentIncomePayrollDirect Deposit12 APIs40.2Column TaxCompanyFintechTax Filing1 API40.0TaxBitCompanyTax ComplianceInformation Reporting1 API40.0
Thin 15 Limited public surface area
Casey's General StoresAzure API ManagementConexxusConvenience StoresFood Service21 APIs37.9HnryAccountingPaymentsInvoicing1 API37.3CleartaxCompanyGSTE-Invoicing5 APIs36.1MoseyCompanyComplianceRegulatory TechnologyState Compliance3 APIs36.1SphereSales TaxVATGST1 API35.6QuickBooksAccountingBookkeepingSmall BusinessFinancials3 APIs34.8MYOBAccountingBusiness ManagementInvoicesBills1 API33.8SalsaPayrollEmbedded FinancePayroll as a ServiceFintech1 API33.8TAXOCompanyAccountingFintech1 API33.8FiledCompanyAccountingArtificial Intelligence1 API33.4RemitianPaymentsFintechAccounting1 API32.3Tax Reporting TemplatesComplianceDocumentationFinanceReporting1 API31.1Clear BooksAccountingInvoicingFinanceUK1 API29.8MainStreetCompanyTax CreditsAccounting1 API29.5Ernst & Young (EY)Professional ServicesBig FourConsultingAssurance26.8
Emerging 35 Early or largely undocumented
DeloitteConsultingAuditLegal25.4IRSIRSFederal-GovernmentTIN Matching5 APIs25.2VAT APIVATEUUK1 API24.0EarnipayCompanyE-InvoicingInvoicingFIRS1 API23.2Black Ore TechnologiesCompanyArtificial IntelligenceFinancial-Services23.1EverlanceCompanyConsumerMileage TrackingExpense Management1 API23.1TaxNexusCannabisSales TaxTax Compliance1 API20.6WealthsimpleCompanyFintechInvestingWealth Management20.5IVIXCompanyGovernmentCompliance20.4Rates and LimitsPayrollBenefitsIRS1 API19.8Bloomberg Tax (BTAX)Tax ResearchTax ComplianceTax Planning2 APIs19.7Blue JCompanyArtificial IntelligenceLegal18.6Accordance AiCompanyArtificial IntelligenceAccounting18.1Neo.TaxCompanyEnterpriseR&D Tax Credit17.9Tax TemplatesDocumentationFinanceTemplates5 APIs17.7DataSnipperCompanyBusiness ApplicationsAuditFinance16.2HubSyncCompanyAccountingWorkflow-Automation15.5BossTaxCompanyBookkeepingFintech15.4CollectiveCompanyFintechAccounting15.4PilotCompanyFintechAccountingBookkeeping15.4FinaloopCompanyAccountingBookkeepingE-Commerce15.1GetbasisCompanyAccountingArtificial IntelligenceAI Agents14.9IndineroCompanyAccountingBookkeeping14.4Thomson ReutersLegalFinanceRisk6 APIs14.4AccrualCompanyFintechAccounting13.8EveryCompanyFintechBankingPayroll13.7Harness WealthCompanyFinancial-ServicesWealth Management13.7AiwynCompanyAi MlAccountingFintech13.1BhubCompanyFintechAccountingBPO12.7TaxfixCompanyFintechTaxes12.7Internal Revenue ServiceFederal-GovernmentFinanceIRS2 APIs11.7Aerial PartnersCompanyCryptocurrencyDigital AssetsAccounting11.4ExacteraCompanyTax TechnologyTransfer Pricing11.4LoctaxCompanyTax ComplianceGovernance11.3Alvarez & MarsalConsultingProfessional ServicesTurnaroundRestructuring11.1
Minimal 22 Almost no public developer surface
FlyFinCompanyConsumerFintech10.6Prime MeridianCompanyTax FilingFintech10.2VelotaxCompanyCreditFintechLending10.0Stride HealthCompanyFintechInsuranceHealth Insurance9.7TaxscoutsCompanyAccountingFintech9.7CoinTrackerCompanyCryptoCryptocurrency9.6SolomonCompanyAi MlAccounting9.2CohnReznickAccountingAuditAssurance8.6ExpressSteuer (fka Express Group)CompanyTaxationFintech8.5Crete Professionals AllianceCompanyAccountingProfessional ServicesAdvisory7.6EYConsultingAccountingAudit7.0PwC (PricewaterhouseCoopers)ConsultingAuditAssurance6.6Carr, Riggs & Ingram (CRI)CompanyAccountingAdvisory5.0FolhamaticCompanyAccountingPayroll5.0PwCConsultingAccountingAudit5.0SabrixCompanyFintechCompliance5.0TrustWeaverCompanySoftware-as-a-ServiceE-InvoicingCompliance5.0WISECRICKET HOLDING KYCompanyAccountingAudit5.0Duane MorrisAntitrustAppellateArbitrationBanking4.5Blank Rome LLPAm Law 100Corporate LawGovernment AffairsGovernment Contracts1 API4.3Ballard SpahrBankingBankruptcyClass ActionCommercial Litigation2.0DechertAntitrustArbitrationArtificial IntelligenceAsset Management1.5

APIs with this tag (55)

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 3 Complete, well-documented, and agent-ready
HubSpot Settings Tax Rates APIHubSpot Settings Tax Rates — 2 operation(s) from HubSpot's published OpenAPI.87.1Stripe Tax APIAutomate sales tax, VAT, and GST compliance on all your transactions-low or no code integrations available.79.7Drippay Tax APISales tax configuration: customer tax addresses, exemptions, business registrations, and jurisdiction rates...76.1
Strong 3 Solid coverage with minor gaps
QuickBooks Sales Tax APIThe QuickBooks Sales Tax API is a premium API that provides programmatic access to the automated sales tax ...62.7Moneyhub Tax APIThe tax API from Moneyhub — 1 operation(s) for tax.61.3ECI Einvoice APIElectronic invoicing integration with the Avalara E-Invoicing & Live Reporting system: documents, input fie...56.6
Developing 17 Usable, with meaningful gaps to close
Akoya Tax APIRetrieves FDX-aligned tax documents for a consumer's permissioned accounts — 1099 form variants (1099-INT, ...53.5Uzum FiscalizationFiscalizes sales and refund receipts and submits them to the Uzbekistan State Tax Committee through a Fisca...49.5Check Payroll APICheck's REST API for embedding full-service payroll — companies, employees, contractors, pay schedules, pay...48.7Anchorage Digital Tax APIThese endpoints allow the organization to manage tax. ** UNDER DEVELOPMENT **47.8Digital Tax Invoice APIRetrieve digital tax invoice data associated with expense entries for compliance and auditing in jurisdicti...46.2Xentral Tax APITax resource45.8HMRC Corporation Tax APIThe HMRC Corporation Tax APIs enable accounting software to submit corporation tax returns, retrieve liabil...45.6HMRC Customs Declarations APIThe HMRC Customs Declarations APIs enable customs software to submit import and export declarations, manage...45.6HMRC PAYE (Pay As You Earn) APIThe HMRC PAYE APIs enable payroll software to submit employer payroll data, retrieve tax codes and employee...45.6HMRC Self Assessment APIThe HMRC Self Assessment APIs enable software to submit and manage self assessment tax returns, income sour...45.6Fonoa Tax APIThe Tax API from Fonoa — 1 operation(s) for tax.43.3Pinwheel Taxes APIThe Pinwheel Taxes API retrieves W-2, 1099-K, 1099-MISC, and 1099-NEC documents directly from a worker's pa...40.2Column Tax APIREST API to embed IRS-authorized income-tax preparation and e-filing. Create a Column Tax user, obtain a sh...40.0TaxBit APIREST API for tax compliance and information reporting: account owners, accounts, transactions, inventory, r...40.0Canal tax APIThe tax API from Canal — 1 operation(s) for tax.39.7Spree Avalara AvaTax IntegrationOfficially certified Avalara AvaTax tax-calculation integration for Spree - real-time tax calculation, addr...39.6Precisely APIs Tax APIThe Tax API from Precisely APIs — 2 operation(s) for tax.39.3
Thin 18 Limited public surface area
Casey's TaxApiTax calculation and configuration for Casey's stores: POST /Taxes for tax calculation, plus per-store tax s...37.9Truv Tax APITax document data for a connected link.37.8TIAA Tax APITax document and income data37.5Hnry Platform APIThe REST API behind the Hnry app. It backs the Hnry iOS/Android clients and the published Hnry Zapier integ...37.3Zeal Tax APIThe Tax API from Zeal — 4 operation(s) for tax.37.3QuickBooks Payroll APIREST API for managing payroll, employees, paychecks, and payroll tax information within QuickBooks Online P...34.8MYOB Business APIREST-based cloud API for MYOB AccountRight, MYOB Essentials, and MYOB Business. Provides endpoints for mana...33.8Salsa Tax APIEmployer and worker tax setup.33.8Filed APIA single GraphQL endpoint for the Filed platform. Create clients and ingest source documents into a binder,...33.4Avalara AvaTax APIAvalara AvaTax API provides global tax calculation, compliance, and reporting for businesses operating acro...31.1IRS Modernized e-File (MeF) APIThe IRS Modernized e-File (MeF) system is the primary e-filing platform for federal tax returns. It defines...31.1TaxJar APITaxJar provides a REST API for real-time sales tax calculations, nexus tracking, and automated tax filing. ...31.1W-2 and 1099 Reporting TemplatesTemplates and schemas for generating IRS W-2 (wages and tax statements) and 1099 (miscellaneous income) for...31.1magento Tax APITax configuration management including tax rates, tax rules, and tax classes used for order tax calculation.31.0IRS Public APIsThe Internal Revenue Service exposes select public datasets and tools through download endpoints, including...30.6Clear Books REST APIRESTful API for integrating with Clear Books accounting software to manage invoices, payments, contacts, ba...29.8Duty and Tax Calculator UnifiedCarrier-agnostic duty and tax calculator that works with any global carrier; includes a 30-day free trial o...29.5Duty and Tax DHL eCommerce AmericasCalculates duties and taxes for cross-border shipments processed through DHL eCommerce Americas.29.5
Emerging 12 Early or largely undocumented
Signifyd Sales Tax APICalculate and remit US sales tax across jurisdictions using Signifyd's Sales Tax product. Provides nexus-aw...26.1Insperity Payroll & Tax APIUpdate an employee's compensation and retrieve general ledger information post payroll. Three published ope...22.9Rates and Limits JSON APIKeyless, unauthenticated REST-style JSON API serving US tax, payroll, benefits, and wage figures with bundl...19.8Asaas Bill Payments APIPay external bills (boletos, concessionárias, GPS, DARF) from the Asaas digital account, with barcode-line ...19.1Asaas Invoices (Nota Fiscal) APISchedule, issue, and retrieve Brazilian electronic invoices (NFS-e) automatically tied to a charge or subsc...19.1H&R Block APIH&R Block provides tax preparation templates and tools for individual and small business returns, including...17.7QuickBooks Tax APIQuickBooks Online API provides access to tax-related financial data including income, expenses, and payroll...17.7TurboTax APIIntuit TurboTax API enables integration with TurboTax for consumer and business tax preparation workflows, ...17.7Xero Tax APIXero's Tax API enables accounting software and tax providers to connect to Xero for seamless tax return pre...17.7Heartland Payroll APIHeartland's Payroll APIs support employee payroll processing, tax filings, and HR integrations for small to...14.6Thomson Reuters Checkpoint APICheckpoint Search API provides access to Thomson Reuters Checkpoint tax and accounting research content inc...14.4Thomson Reuters ONESOURCE APIONESOURCE APIs provide integration with Thomson Reuters tax compliance software including income tax, indir...14.4
Minimal 2 Almost no public developer surface
IntegrationsPre-built integrations across credit bureaus (FICO LiquidCredit, PayNet, D&B, Experian, Equifax, TransUnion...9.5Tax Controversy & Financial Crimes ReportAttorney-authored LexBlog covering tax controversy, IRS disputes, and financial crime defense.7.9

Companies reaching this through an API (25)

These companies publish an API, specification or operation carrying “Tax” 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.

Akoya Anchorage Digital Asaas Canal Department of the Treasury DHL Drippay ECI Solutions Fox Rothschild LLP Heartland Payment Systems HubSpot Insperity Magento Moneyhub Odessa Technologies Precisely APIs SAP Concur Expense Signifyd Spree Commerce Stripe TIAA Truv Uzum Xentral Zeal

Score breakdown

Frequency
60.2
log-scaled weighted occurrences
Breadth
2.5
spread across providers
Quality lift
26.0
mean composite of providers using it
Cohesion
16.2
strength of nearest seed neighbor

Related tags

Accounting 49 co-occurrences Professional Services 16 co-occurrences Payroll 25 co-occurrences Bookkeeping 12 co-occurrences Tax Filing 7 co-occurrences Advisory 7 co-occurrences Audit 14 co-occurrences Tax Compliance 7 co-occurrences

Where this tag comes from

Provider tag90
Api tag55
Openapi tag11
Openapi op tag43

Cohort brief

Auto-generated

The 88 providers in the APIs.io catalog tagged Tax, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
88
all scored
Mean Kin Score
23.3
-0.6 vs catalog 23.9
Mean Agent Readiness
9.4
-2.6 vs catalog 12
Spread
1.5–62.7
median 19.2 · σ 14.7
How the 88 split by band
Exemplar 0Strong 2Developing 16Thin 15Emerging 35Minimal 20
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Access Clarity 31.2 26.5 +4.7 88
Operational Transparency 14.3 14 +0.3 88
Discoverability 61.4 61.2 +0.2 88
Contract Governance 4.4 6.4 -2 88
Developer Ergonomics 20.8 23.4 -2.6 88
Contract Quality 16.8 19.8 -3 88

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
ArtifactThis cohortCatalogDifference
MCP server (any) 8% 10% -2
MCP server (first-party) 8% 13% -5
Agent Skills 0% 0% 0
OAuth scopes 6% 11% -5
Security 100% 97% +3
Arazzo workflows 2% 2% 0
Governance rules 9% 14% -5

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. 1 Intuit 62.7
  2. 2 FlowAccount 57.2
  3. 3 Cadana 51.2
  4. 4 Swap 49.5
  5. 5 Check Technologies 48.7
  6. 6 inFakt 46.8
  7. 7 HMRC UK Tax Authority 45.6
  8. 8 MileIQ 44.7
  9. 9 Workday Payroll 43.8
  10. 10 Fonoa 43.3
Top by Agent Readiness
  1. 1 MileIQ 39.8
  2. 2 Cadana 39
  3. 3 Intuit 36.1
  4. 4 Check Technologies 34.5
  5. 5 Workday Payroll 30.6
  6. 6 Planomy Tax Data 30.2
  7. 7 Fonoa 29.8
  8. 8 Casey's General Stores 29.7
  9. 9 Remitian 28.3
  10. 10 Earnipay 27.9
All 90 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 15 September 2026, across 27661 providers, using the same computation served by the APIs.io cohort API. Briefs are published for rosters of 5 or more scored providers; below that a distribution is not meaningful.

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  • cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
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  • 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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