# LeanLaw

**Canonical:** https://apis.io/providers/leanlaw/  
**Website:** https://www.leanlaw.co/  
**APIs profiled:** 1

LeanLaw is legal billing and revenue-operations software for small and mid-sized law firms, built natively on QuickBooks Online. It runs the full law-firm revenue lifecycle — time and expense tracking, matter management, trust/IOLTA accounting, flat-fee and contingency billing, invoicing, e-payments, LEDES output and compensation reporting — and keeps a real-time two-way sync with QuickBooks Online so invoices, payments, trust deposits and expenses post automatically. LeanLaw publishes a public REST API (v2) at api.leanlaw.io covering clients, matters, time entries, expenses, fixed fees, invoices, practice areas, custom fields, users and LEDES billing codes, with an OpenAPI 3.0.4 specification, a Zudoku-powered developer portal at platform.leanlaw.io, and a remote MCP server for AI assistants that is currently in private beta.

## Kin Score — 56.8 / 100 (strong)

Scored 2026-09-01 under rubric 0.17.2. Trend: flat (+0.0 from 56.8).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 48.9 |
| Governance | 18.2 |
| Contract Governance | 18.2 |
| Operational Transparency | 34.2 |
| Developer Ergonomics | 58.9 |
| Commercial Clarity | 76.3 |
| Access Clarity | 76.3 |

Regulatory layer — **Payments**: 54.7 (matched via tags).

## Agent readiness — 37.1 (agent-ready)

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

## APIs (11)

- **LeanLaw MCP Server** — LeanLaw operates a remote Model Context Protocol server at https://api.leanlaw.io/mcp that lets an AI assistant work with a firm's clients, matters, time entries, expenses, fixe...
- **LeanLaw Client API** — The Client API from LeanLaw — 3 operation(s) for client.
- **LeanLaw Codes API** — The Codes API from LeanLaw — 1 operation(s) for codes.
- **LeanLaw Custom Field API** — The CustomField API from LeanLaw — 1 operation(s) for customfield.
- **LeanLaw Expense API** — The Expense API from LeanLaw — 2 operation(s) for expense.
- **LeanLaw Fixed Fee API** — The FixedFee API from LeanLaw — 2 operation(s) for fixedfee.
- **LeanLaw Invoice API** — The Invoice API from LeanLaw — 1 operation(s) for invoice.
- **LeanLaw Matter API** — The Matter API from LeanLaw — 2 operation(s) for matter.
- **LeanLaw Practice Area API** — The PracticeArea API from LeanLaw — 2 operation(s) for practicearea.
- **LeanLaw Time Entry API** — The TimeEntry API from LeanLaw — 2 operation(s) for timeentry.
- **LeanLaw User API** — The User API from LeanLaw — 2 operation(s) for user.

## MCP servers (1)

- **LeanLaw MCP Server** — LeanLaw operates a first-party remote MCP server that lets an AI assistant work with a law firm's clients, matters, time entries, expenses, fixed fees and invoices. Per the prov...

## Security (2)

- **Leanlaw Authentication** — http/oauth2 · 2 schemes
- **Leanlaw Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Leanlaw Plans Pricing**

## Tags

Legal, Legal Billing, Law Firms, Time Tracking, Billing, Invoicing, Accounting, Trust Accounting, Practice Management, QuickBooks, Payments, Legal Tech, Software-as-a-Service

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