# Splitwise

**Canonical:** https://apis.io/providers/splitwise/  
**Website:** https://www.splitwise.com  
**APIs profiled:** 7

Splitwise is an expense-sharing and bill-splitting service that helps roommates, travel groups, couples, and friends track shared costs and settle up fairly. Its public Self-Serve REST API (v3.0) lets third-party applications read and manage a user's groups, friends, expenses, comments, and notifications on that user's behalf, authenticating with OAuth 2.0 or a personal API key. Splitwise was added to the API Evangelist network from a venture-capital portfolio lead and has been enriched from its public developer documentation and OpenAPI specification.

## Kin Score — 45.0 / 100 (developing)

Scored 2026-08-19 under rubric 0.12.0. Trend: flat (-0.2 from 45.2).

| Facet | Score |
|---|---|
| Discoverability | 92.6 |
| Contract Quality | 49.5 |
| Governance | 16.7 |
| Contract Governance | 16.7 |
| Operational Transparency | 10.5 |
| Developer Ergonomics | 42.3 |
| Commercial Clarity | 34.2 |
| Access Clarity | 34.2 |

Regulatory layer — **Payments**: 64.1 (matched via tags).

## Agent readiness — 34.0 (agent-ready)

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

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (7)

- **Splitwise comments API** — The comments API from Splitwise — 3 operation(s) for comments.
- **Splitwise expenses API** — The expenses API from Splitwise — 6 operation(s) for expenses.
- **Splitwise friends API** — The friends API from Splitwise — 5 operation(s) for friends.
- **Splitwise groups API** — A Group represents a collection of users who share expenses together. For example, some users use a Group to aggregate expenses related to a home. Others use it to represent a t...
- **Splitwise notifications API** — The notifications API from Splitwise — 1 operation(s) for notifications.
- **Splitwise other API** — The other API from Splitwise — 2 operation(s) for other.
- **Splitwise users API** — Resources to access and modify user information.

## MCP servers (1)

- **splitwise-mcp.yml**

## Security (3)

- **Splitwise Authentication** — http/oauth2 · 2 schemes
- **Splitwise Domain Security** — TLSv1.3 · HSTS · DMARC
- **Splitwise Vulnerability Disclosure** — security.txt · contact published

## Tags

Company, Consumer, Expense Management, Personal Finance, Bill Splitting, Payments, REST API, OAuth

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