Tax & Compliance Software in United Kingdom & Ireland
7 tax & compliance software providers across United Kingdom & Ireland, publishing 14 APIs.
Tax & Compliance Software across United Kingdom & Ireland — 7 providers on the APIs.io network sit in both cohorts, and between them they publish 14 indexed APIs.
6 of the 7 publish at least one machine-readable API; 1 publish nothing indexed at all. That split is the first thing worth reading here — a vertical can be well represented in a market and still have almost no programmable surface.
By Kin Score band: 3 emerging, 2 developing, 1 thin, and 1 minimal.
Leading by rating: Taxley (UK Corporation Tax API), HMRC UK Tax Authority, Hnry, Sage Accounting, Clear Books, VAT API, and 1 more.
Region membership is derived from three explicit signals — a provider tag, a provider-name pattern, or a stated headquarters in the provider’s own description. This is a map of stated headquarters, not of markets served.
Providers (7)
| Provider | Description | APIs | Rating |
|---|---|---|---|
| Taxley (UK Corporation Tax API) | Taxley provides free UK Corporation Tax calculators and a public JSON API for developers and AI assistants. It offers tools to compute corporation tax, deadlines, penalties, and... | 2 | developing |
| HMRC UK Tax Authority | HM Revenue and Customs (HMRC) provides over 115 APIs through the HMRC Developer Hub for UK tax compliance including Making Tax Digital for VAT and Income Tax, PAYE, customs decl... | 8 | developing |
| Hnry | Hnry is a New Zealand-founded financial administration and accounting service for sole traders, contractors and freelancers, operating in New Zealand, Australia and the United K... | 1 | thin |
| Sage Accounting | Sage Accounting (formerly Sage Business Cloud Accounting and Sage One) is Sage's cloud-based accounting software for UK and international small and medium businesses, covering i... | 1 | emerging |
| Clear Books | Clear Books is UK cloud accounting software with a REST API for managing invoices, expenses, bank transactions, contacts, reports, and tax submissions for small businesses. | 1 | emerging |
| VAT API | EU and UK VAT compliance REST API providing VAT rate retrieval, VAT number validation via the European Commission VIES system and UK HMRC, currency conversion, and VAT-compliant... | 1 | emerging |
| Taxscouts | TaxScouts is a UK online tax-return and Self Assessment service that pairs individuals, sole traders, landlords and investors with accredited accountants to prepare, review and ... | 0 | minimal |
Indexed API documents (14)
Two numbers, both real: these providers publish 14 APIs as their own documents, which the catalog indexes split one-per-resource into 14 documents.
Taxley API
Taxley (UK Corporation Tax API) Tools API
HMRC Self Assessment API
HMRC PAYE (Pay As You Earn) API
HMRC Customs Declarations API
HMRC Corporation Tax API
HMRC UK Tax Authority Liabilities API
HMRC UK Tax Authority Obligations API
HMRC UK Tax Authority Payments API
HMRC UK Tax Authority Returns API
Hnry Platform API
Sage Accounting v3.1 REST API
Clear Books REST API
VAT API v2
Other industries in United Kingdom & Ireland
Tax & Compliance Software elsewhere
This page is the intersection of two independently computed cohorts:
United Kingdom & Ireland and
Tax & Compliance Software. A provider appears here only when it is
already a member of both. United Kingdom & Ireland membership is matched on tag, name pattern, stated HQ,
so this is a floor rather than a census — coverage gaps show up here as small numbers, not as absent pages.
Work with this as data
Every region here is available over the APIs.io API and to AI agents over MCP.