# Abacus

**Canonical:** https://apis.io/providers/abacus/  
**Website:** https://www.abacus.com/  
**APIs profiled:** 3

Abacus (now part of Emburse Spend) is an expense management platform that allows businesses to streamline expense reporting, receipts, and reimbursements. The Abacus API is available to partners and enterprise customers, providing programmatic access to member management and expense operations using OAuth 2.0 authentication.

## Kin Score — 27.2 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 27.2).

| Facet | Score |
|---|---|
| Discoverability | 64.8 |
| Contract Quality | 29.9 |
| Governance | 25.0 |
| Contract Governance | 25.0 |
| Operational Transparency | 7.9 |
| Developer Ergonomics | 11.9 |
| Commercial Clarity | 34.2 |
| Access Clarity | 34.2 |

## Agent readiness — 35.0 (agent-ready)

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

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (3)

- **Abacus Authentication API** — OAuth 2.0 authentication operations
- **Abacus Expenses API** — Expense report management and operations
- **Abacus Members API** — Member management operations for inviting and managing expense users

## Agentic access (1)

- **Abacus Agentic Access** — 8 operations · 4 acting

## Security (3)

- **Abacus Authentication** — oauth2 · 1 scheme
- **Abacus Domain Security** — TLSv1.2 · HSTS · DMARC
- **Abacus Vulnerability Disclosure** — security.txt · contact published

## Plans (1)

- **Abacus Plans Pricing**

## Use cases (5)

- **Employee Onboarding** — Automatically invite new employees to the expense platform via API
- **Employee Offboarding** — Programmatically suspend departed employees from expense access
- **Expense Reconciliation** — Retrieve and reconcile expense reports for accounting integration
- **Spend Analytics** — Pull expense data by category, member, or date range for reporting
- **Third-party Integration** — Connect Abacus expense data with ERP and accounting systems

## Tags

Accounting, Expense Management, Finance, Reimbursement

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