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LeanLaw Client API

The Client API from LeanLaw — 3 operation(s) for client.

LeanLaw Client API is one of 11 APIs that LeanLaw publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Clients. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, an API reference, a getting-started guide, authentication docs, and rate-limit docs.

This API exposes 6 operations across 3 paths, and defines 14 schemas. It is described by OpenAPI 3.2.0, at version v1.

Requests are made against a single base URL, https://api.leanlaw.io.

6 operations 3 paths 14 schemas 1 DELETE3 GET1 POST1 PUT

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
API Version
v1
Base URL
https://api.leanlaw.io
Authentication
HTTP Bearer
Resource Areas
1

Authentication & Security 1

LeanLaw Client API declares 1 security scheme for authenticating requests. It accepts HTTP bearer tokens (BearerAuth). By default, every request must be authenticated.

Paths & Operations 6

Across 3 paths, the API surfaces 6 operations — 1 DELETE, 3 GET, 1 POST, 1 PUT. Each is listed below with its method, path, parameters, and response codes.

Client 6
GET
/v2/clients
Get a list of clients
ListClients 7 params → 200
POST
/v2/clients
Create a new client
CreateClient body → 200
GET
/v2/clients/{id}
Get a client by id
GetClient 1 param → 200
PUT
/v2/clients/{id}
Update a client
UpdateClient 1 param body → 200
DELETE
/v2/clients/{id}
Delete a client
DeleteClient 1 param → 200
GET
/v2/clients/{id}/balances
Get the invoice balances for a client
GetClientBalances 1 param → 200

Schemas 14

The contract defines 14 schemas that model the data the API accepts and returns. The most detailed are Contact (16 properties), ClientDetail (7 properties), ClientList (6 properties), CreateClient (5 properties). Each schema is shown below with its type and property counts.

Pagination
object
Pagination information
4 properties 3 required
Contact
object
16 properties
ClientBalancesResponse
object
Standardized API response wrapper for single item responses
1 property
CreateClient
object
When creating a client you must provide either a company name, or first and last name, or both
5 properties 1 required
CustomFieldValueType
string
The type of the custom field. "Enum" fields are enumerated fields with a set of possible values, the values are outlined in the 'options' property.
UpdateClient
object
Update an existing client
5 properties
ClientBalances
object
Financial summary of the client
5 properties 5 required
CustomFieldValue
object
A custom field and its value on a client, matter or user
5 properties 4 required
Metadata
object
2 properties 2 required
ClientDetailResponse
object
Standardized API response wrapper for single item responses
1 property
CustomFieldValueUpdate
object
Sets the value of a single custom field on a record. Only the fields listed are touched - any custom field not in the array keeps its current value.
3 properties 1 required
ClientList
object
Represents a client of the firm
6 properties 2 required
ClientDetail
object
A client of the firm with contact information and other detail
7 properties 3 required
ClientListListResponse
object
Standardized API response wrapper for list responses with pagination Paginationdata
2 properties

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

leanlaw-client-api-openapi.yml Raw ↑

Other APIs LeanLaw publishes across the network.

LeanLaw MCP Server
LeanLaw Codes API
LeanLaw Custom Field API
LeanLaw Expense API
LeanLaw Fixed Fee API
LeanLaw Invoice API
LeanLaw Matter API
LeanLaw Practice Area API
LeanLaw Time Entry API
LeanLaw User API
Where this information came from

This is an independent, third-party profile of LeanLaw Client API, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.

The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.

Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.

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