LegalOn

LegalOn Contract API

REST API for the LegalOn contract platform. Documented capabilities cover contract file operations (upload, retrieve, update, delete), contract information management (register and update metadata such as counterparty name and contract type), linking related documents to a contract, and retrieving lists and details of registered contracts. Authentication is OAuth 2.0 using the client_credentials grant, scoped to workspaces where the caller holds the appropriate role. Announced publicly on 2026-07-13 as the second phase of LegalOn API connectivity; the API reference is not published on the open web.

GitHub

Documentation

📖
Authentication
https://raw.githubusercontent.com/api-evangelist/legalon/refs/heads/main/authentication/legalon-authentication.yml

Other Resources

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Conventions
https://raw.githubusercontent.com/api-evangelist/legalon/refs/heads/main/conventions/legalon-conventions.yml
🔗
Announcement
https://legalontech.jp/10843/
🔗
Announcement
https://legalontech.jp/10478/
🔗
APIsJSON
https://raw.githubusercontent.com/api-evangelist/legalon/refs/heads/main/apis.yml

API entry from apis.yml

apis.yml Raw ↑ 
aid: legalon:contract-api
name: LegalOn Contract API
description: REST API for the LegalOn contract platform. Documented capabilities cover contract file operations
  (upload, retrieve, update, delete), contract information management (register and update metadata such
  as counterparty name and contract type), linking related documents to a contract, and retrieving lists
  and details of registered contracts. Authentication is OAuth 2.0 using the client_credentials grant,
  scoped to workspaces where the caller holds the appropriate role. Announced publicly on 2026-07-13 as
  the second phase of LegalOn API connectivity; the API reference is not published on the open web.
humanURL: https://legalontech.jp/10843/
baseURL: https://api.legalontech.com
x-baseurl-confidence: probed-host-unconfirmed-by-docs
tags:
- Contracts
- Contract Management
- Documents
- Legal
properties:
- type: Authentication
  url: authentication/legalon-authentication.yml
- type: Conventions
  url: conventions/legalon-conventions.yml
- type: Announcement
  name: LegalOn contract file and information API (phase 2)
  url: https://legalontech.jp/10843/
- type: Announcement
  name: LegalOn API connectivity (phase 1)
  url: https://legalontech.jp/10478/