# Sage Accounting

**Canonical:** https://apis.io/providers/sage-accounting/  
**Website:** https://www.sage.com/en-gb/products/sage-accounting/  
**APIs profiled:** 1

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 invoicing, expenses, banking, VAT, payroll integration, and financial reporting. Its REST API at https://api.accounting.sage.com/v3.1 provides programmatic access to contacts, sales and purchase invoices, ledger accounts, journals, tax rates, bank accounts, and attachments. Authentication uses OAuth 2.0 with the authorization endpoint at https://www.sageone.com/oauth2/auth/central and the token endpoint at https://oauth.accounting.sage.com/token; access tokens expire after five minutes and refresh tokens after 31 days, and the X-Business header selects the target business.

## Kin Score — 26.9 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 26.9).

| Facet | Score |
|---|---|
| Discoverability | 68.5 |
| Contract Quality | 43.3 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 10.5 |
| Developer Ergonomics | 26.2 |
| Commercial Clarity | 13.2 |
| Access Clarity | 13.2 |

## Agent readiness — 15.4 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## APIs (1)

- **Sage Accounting v3.1 REST API** — REST API for Sage Business Cloud Accounting providing access to contacts, sales invoices, sales credit notes, purchase invoices, purchase credit notes, ledger accounts, journals...

## Security (2)

- **Sage Accounting Domain Security** — TLSv1.3 · HSTS · DMARC
- **Sage Accounting Vulnerability Disclosure** — security.txt · contact published

## Tags

Accounting, Bookkeeping, Invoicing, Small Business, VAT, Sage, UK, Authentication

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/sage-accounting/). Scores are computed from the provider's own public artifacts under a published rubric.