LegalOn website screenshot

LegalOn

LegalOn Technologies is a legal-technology company building AI software for in-house legal teams, corporate legal operations, and law firms. Its platform covers AI contract review and redlining, contract playbooks, matter management, a contract data vault, translation, entity and board management, and agentic legal workflows, with a Microsoft Word integration for reviewing agreements in place. Founded in Japan as LegalForce and now operating in both Japan (legalontech.jp) and the United States (legalontech.com), the company runs a sibling product family for governance (GovernOn), sales (DealOn), HR (WorkOn), and marketing compliance (DocumentOn). LegalOn publishes a REST API for contract files and contract metadata — upload, retrieve, update and delete contract documents, register and update contract information such as counterparties and contract types, link related documents, and list registered contracts — authenticated with OAuth 2.0 client credentials, intended for integration with contract management systems, CRM, and BI tooling. The API is announced publicly but its reference documentation is not published on the open web; access is arranged through the vendor. The company is backed by Hongshan and the SoftBank Vision Fund, and publishes SOC 2 Type II, ISO/IEC 27001:2022 and ISO/IEC 27017:2015 certifications through a public trust center.

LegalOn publishes 1 API on the APIs.io network. Tagged areas include Company, Technology, Legal, Legal Technology, and Contracts.

LegalOn’s developer surface includes engineering blog, pricing, changelog, support, authentication, and 20 more developer resources.

30.3/100 thin ▬ flat Agent 14/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5
AccessSelf serve
1 APIs
CompanyTechnologyLegalLegal TechnologyContractsContract ManagementContract Lifecycle ManagementArtificial IntelligenceDocument ManagementComplianceGovernanceSaaSJapan

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 30.3/100 · thin
Contract Quality 0.0 / 25
Developer Ergonomics 3.5 / 20
Commercial Clarity 12.1 / 20
Operational Transparency 5.5 / 13
Governance 0.0 / 12
Discoverability 9.3 / 10
Agent readiness — 14/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 4 / 4
Consent & Bot Identity 0 / 3
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/legalon: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

LegalOn Contract API

REST API for the LegalOn contract platform. Documented capabilities cover contract file operations (upload, retrieve, update, delete), contract information management (register ...

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Legalon Authentication

oauth2 · 1 scheme

SECURITY

Legalon Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Legalon Trust Center

SOC 2, ISO 27001, ISO 27017, GDPR

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Access & Security 6

Authentication, authorization, and security posture

Operate 4

Status, limits, changes, and where to get help

Commercial 3

Pricing, plans, and the legal terms of use

Company 5

The organization behind the API

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

apis.yml Raw ↑
aid: legalon
name: LegalOn
description: LegalOn Technologies is a legal-technology company building AI software for in-house legal teams, corporate legal
  operations, and law firms. Its platform covers AI contract review and redlining, contract playbooks, matter management,
  a contract data vault, translation, entity and board management, and agentic legal workflows, with a Microsoft Word integration
  for reviewing agreements in place. Founded in Japan as LegalForce and now operating in both Japan (legalontech.jp) and the
  United States (legalontech.com), the company runs a sibling product family for governance (GovernOn), sales (DealOn), HR
  (WorkOn), and marketing compliance (DocumentOn). LegalOn publishes a REST API for contract files and contract metadata —
  upload, retrieve, update and delete contract documents, register and update contract information such as counterparties
  and contract types, link related documents, and list registered contracts — authenticated with OAuth 2.0 client credentials,
  intended for integration with contract management systems, CRM, and BI tooling. The API is announced publicly but its reference
  documentation is not published on the open web; access is arranged through the vendor. The company is backed by Hongshan
  and the SoftBank Vision Fund, and publishes SOC 2 Type II, ISO/IEC 27001:2022 and ISO/IEC 27017:2015 certifications through
  a public trust center.
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://cdn.prod.website-files.com/68c03413336317ed3e6c0cb5/68f4566ea04559817c98ad87_LegalOn_OG%201.png
url: https://raw.githubusercontent.com/api-evangelist/legalon/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- hongshan
- softbank-vision-fund
x-tier: profiled
x-tier-reason: enrichment-pipeline
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Technology
- Legal
- Legal Technology
- Contracts
- Contract Management
- Contract Lifecycle Management
- Artificial Intelligence
- Document Management
- Compliance
- Governance
- SaaS
- Japan
apis:
- 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/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.legalontech.com/
- type: Website
  name: LegalOn Technologies (Japan)
  url: https://legalontech.jp
- type: Blog
  url: https://www.legalontech.com/blog
- type: Pricing
  url: https://www.legalontech.com/pricing
- type: Login
  url: https://app.legalontech.com/
- type: TermsOfService
  url: https://www.legalontech.com/terms-and-conditions
- type: PrivacyPolicy
  url: https://www.legalontech.com/terms-and-conditions#Privacy-Policy
- type: Security
  url: https://www.legalontech.com/security
- type: TrustCenter
  url: https://trust.legalontech.com/
- type: Compliance
  url: https://trust.legalontech.com/
- type: StatusPage
  url: https://status.legalontech.com/
- type: ChangeLog
  url: https://www.legalontech.com/new-at-legalon
- type: Support
  name: Contact LegalOn Technologies
  url: https://legalontech.jp/contact
- type: Press
  url: https://www.legalontech.com/newsroom
- type: Careers
  url: https://www.legalontech.com/careers
- type: CaseStudies
  url: https://www.legalontech.com/customers
- type: Authentication
  url: authentication/legalon-authentication.yml
- type: Conventions
  url: conventions/legalon-conventions.yml
- type: Conformance
  url: conformance/legalon-conformance.yml
- type: Lifecycle
  url: lifecycle/legalon-lifecycle.yml
- type: ChangeLog
  name: LegalOn changelog artifact
  url: changelog/legalon-changelog.yml
- type: TrustCenter
  name: LegalOn trust center artifact
  url: security/legalon-trust-center.yml
- type: DomainSecurity
  url: security/legalon-domain-security.yml
- type: WellKnown
  url: well-known/legalon-well-known.yml
- type: LLMsTxt
  url: llms/legalon-llms.txt
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence