GC AI

GC AI is the AI platform for in-house legal teams, built by three-time General Counsel Cecilia Ziniti. It helps corporate counsel draft and review contracts, run reusable review Playbooks, conduct grounded legal research across 13M+ US court opinions, and work directly inside Microsoft Word. The GC AI External API (v1) gives programmatic access to chat completions, files, folders, projects, playbooks, and skills for workflow automation (Zapier, Make, n8n, or custom apps), and GC AI also operates an OAuth-protected Model Context Protocol (MCP) server. The platform is SOC 2 Type II, SOC 3, and GDPR compliant, with zero data-retention agreements with its model providers.

GC AI publishes 9 API contracts indexed on the APIs.io network, including Chat API, Files API, Folders API, and 6 more. Tagged areas include Company, Legal, Legal AI, Contracts, and In-House Counsel.

GC AI’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, pricing, signup flow, and 29 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

53.4/100 developing ▬ flat Agent 53/100 agent ready Front door AI 6/6 dominant saas Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 published contract 1 MCP Servers 3 Agent Skills

Company Legal Legal AI ContractsIn-House CounselArtificial Intelligence Document Review Enterprise MCP

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Legal Management

BC-150

Playbooks

POST /playbooks POST /playbooks/{id}/run

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 53.4/100 · developing

Contract Quality 11.5 / 21

Developer Ergonomics 10.2 / 17

Access Clarity 10.3 / 17

Operational Transparency 5.8 / 11

Contract Governance 0.5 / 10

Discoverability 5.5 / 9

Regulatory Posture 4.1 / 15

Agent readiness — 53/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 0 / 5

Distinct Operations 3 / 3

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too
Pagination +5 pts — share of collection GETs (an array, or one wrapped in data/items/results ...) that declare a page/limit/offset/cursor parameter, a Link header or a next/cursor field; na with no collection GETs
Agentic Commerce Well-Known Document +5 pts — a parsing /.well-known/ucp.json or acp.json declaring a version and at least one service — `self` when its endpoints are on the provider's own domain, `platform` when they are on a vendor's

3 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Governance scores 4.5 — up to +11.5 composite points
Contract Quality scores 54.3 — up to +11.4 composite points
Developer Ergonomics scores 60.1 — up to +8.0 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/gc-ai/apis.yml: open an issue on github.com/api-evangelist/gc-ai to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 9

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

GC AI Chat API

AI chat completion endpoints

GC AI Files API

File upload and management endpoints

GC AI Folders API

Folder management endpoints

GC AI Playbooks API

Playbook review endpoints

GC AI Profiles API

Personal and company profile endpoints

GC AI Projects API

Project management endpoints

GC AI Skills API

Skill library management endpoints

GC AI Usage API

Usage and credit/billing reporting endpoints

GC AI Utility API

Health check and connectivity endpoints

Scroll for all 9

Open Collections 9

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

GC AI External Chat API

OPEN COLLECTION

GC AI External Chat Files API

OPEN COLLECTION

GC AI External Chat Folders API

OPEN COLLECTION

GC AI External Chat Playbooks API

OPEN COLLECTION

GC AI External Chat Profiles API

OPEN COLLECTION

GC AI External Chat Projects API

OPEN COLLECTION

GC AI External Chat Skills API

OPEN COLLECTION

GC AI External Chat Usage API

OPEN COLLECTION

GC AI External Chat Utility API

OPEN COLLECTION

Scroll for all 9

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

GC AI MCP Server

Remote MCP server at app.gc.ai over HTTP; 58 tools listed.

MCP SERVER

Agent Skills 3

Packaged agent skills for driving this provider's APIs from an AI assistant.

Ask GC AI a question grounded in uploaded documents

AGENT SKILL

Organize a matter as a GC AI Project

AGENT SKILL

Review a contract with a GC AI Playbook

AGENT SKILL

Pricing Plans 1

Published pricing tiers and plan structures.

Gc Ai Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Gc Ai Rate Limits

2 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Gc Ai Finops

FINOPS

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Gc Ai Openapi Overlay

3 actions · update · gc-ai-openapi-original.yml

DERIVED

Security Posture 3

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

Gc Ai Authentication

apiKey · 1 scheme

SECURITY

Gc Ai Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Gc Ai Trust Center

SOC 2 Type 1, SOC 2 Type 2, SOC 3, GDPR

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Gc Ai Agentic Access

58 operations · 34 acting · 3 human-in-the-loop

58 operations · 34 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

MCPServer

AgentSkill

WellKnown

LLMsTxt

AgenticAccess

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

DataModel

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace

PostmanWorkspace

Access & Security 4

Authentication, authorization, and security posture

Compliance

TrustCenter

DomainSecurity

Authentication

Operate 7

Status, limits, changes, and where to get help

HelpCenter

Support

Community

StatusPage

ChangeLog

ChangeLog

RateLimits

Scroll for all 7

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 3

The organization behind the API

BlogRSS

BlogRSS

Blog

Blog

Website

Website

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Overlay

Overlay

Source (apis.yml)

aid: gc-ai
name: GC AI
description: GC AI is the AI platform for in-house legal teams, built by three-time General Counsel Cecilia Ziniti. It helps
  corporate counsel draft and review contracts, run reusable review Playbooks, conduct grounded legal research across 13M+
  US court opinions, and work directly inside Microsoft Word. The GC AI External API (v1) gives programmatic access to chat
  completions, files, folders, projects, playbooks, and skills for workflow automation (Zapier, Make, n8n, or custom apps),
  and GC AI also operates an OAuth-protected Model Context Protocol (MCP) server. The platform is SOC 2 Type II, SOC 3, and
  GDPR compliant, with zero data-retention agreements with its model providers.
url: https://raw.githubusercontent.com/api-evangelist/gc-ai/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - rate-limits
  - security
  generated: '2026-09-03'
  method: derived
image: https://framerusercontent.com/images/Zth3qSTP7QF72InJJ60jCoqi190.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- northzone
- scale-venture-partners
x-tier: enriched
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
x-docs-platform: mintlify
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-03
x-docs-hosting: vercel
tags:
- Company
- Legal
- Legal AI
- Contracts
- In-House Counsel
- Artificial Intelligence
- Document Review
- Enterprise
- MCP
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: gc-ai:gc-ai-chat-api
  name: GC AI Chat API
  description: AI chat completion endpoints
  humanURL: https://docs.gc.ai/api-reference/introduction
  baseURL: https://app.gc.ai/api/external/v1
  tags:
  - Chat
  properties:
  - type: OpenAPI
    url: openapi/gc-ai-chat-api-openapi.yml
  - type: Documentation
    url: https://docs.gc.ai/api-reference/introduction
  - type: APIReference
    url: https://docs.gc.ai/api-reference/introduction
- aid: gc-ai:gc-ai-files-api
  name: GC AI Files API
  description: File upload and management endpoints
  humanURL: https://docs.gc.ai/api-reference/introduction
  baseURL: https://app.gc.ai/api/external/v1
  tags:
  - File
  tags_raw:
  - Files
  properties:
  - type: OpenAPI
    url: openapi/gc-ai-files-api-openapi.yml
  - type: Documentation
    url: https://docs.gc.ai/api-reference/introduction
  - type: APIReference
    url: https://docs.gc.ai/api-reference/introduction
- aid: gc-ai:gc-ai-folders-api
  name: GC AI Folders API
  description: Folder management endpoints
  humanURL: https://docs.gc.ai/api-reference/introduction
  baseURL: https://app.gc.ai/api/external/v1
  tags:
  - Folders
  properties:
  - type: OpenAPI
    url: openapi/gc-ai-folders-api-openapi.yml
  - type: Documentation
    url: https://docs.gc.ai/api-reference/introduction
  - type: APIReference
    url: https://docs.gc.ai/api-reference/introduction
- aid: gc-ai:gc-ai-playbooks-api
  name: GC AI Playbooks API
  description: Playbook review endpoints
  humanURL: https://docs.gc.ai/api-reference/introduction
  baseURL: https://app.gc.ai/api/external/v1
  tags:
  - Playbooks
  properties:
  - type: OpenAPI
    url: openapi/gc-ai-playbooks-api-openapi.yml
  - type: Documentation
    url: https://docs.gc.ai/api-reference/introduction
  - type: APIReference
    url: https://docs.gc.ai/api-reference/introduction
- aid: gc-ai:gc-ai-profiles-api
  name: GC AI Profiles API
  description: Personal and company profile endpoints
  humanURL: https://docs.gc.ai/api-reference/introduction
  baseURL: https://app.gc.ai/api/external/v1
  tags:
  - Profiles
  properties:
  - type: OpenAPI
    url: openapi/gc-ai-profiles-api-openapi.yml
  - type: Documentation
    url: https://docs.gc.ai/api-reference/introduction
  - type: APIReference
    url: https://docs.gc.ai/api-reference/introduction
- aid: gc-ai:gc-ai-projects-api
  name: GC AI Projects API
  description: Project management endpoints
  humanURL: https://docs.gc.ai/api-reference/introduction
  baseURL: https://app.gc.ai/api/external/v1
  tags:
  - Project
  tags_raw:
  - Projects
  properties:
  - type: OpenAPI
    url: openapi/gc-ai-projects-api-openapi.yml
  - type: Documentation
    url: https://docs.gc.ai/api-reference/introduction
  - type: APIReference
    url: https://docs.gc.ai/api-reference/introduction
- aid: gc-ai:gc-ai-skills-api
  name: GC AI Skills API
  description: Skill library management endpoints
  humanURL: https://docs.gc.ai/api-reference/introduction
  baseURL: https://app.gc.ai/api/external/v1
  tags:
  - Skills
  properties:
  - type: OpenAPI
    url: openapi/gc-ai-skills-api-openapi.yml
  - type: Documentation
    url: https://docs.gc.ai/api-reference/introduction
  - type: APIReference
    url: https://docs.gc.ai/api-reference/introduction
- aid: gc-ai:gc-ai-usage-api
  name: GC AI Usage API
  description: Usage and credit/billing reporting endpoints
  humanURL: https://docs.gc.ai/api-reference/introduction
  baseURL: https://app.gc.ai/api/external/v1
  tags:
  - Usage
  properties:
  - type: OpenAPI
    url: openapi/gc-ai-usage-api-openapi.yml
  - type: Documentation
    url: https://docs.gc.ai/api-reference/introduction
  - type: APIReference
    url: https://docs.gc.ai/api-reference/introduction
- aid: gc-ai:gc-ai-utility-api
  name: GC AI Utility API
  description: Health check and connectivity endpoints
  humanURL: https://docs.gc.ai/api-reference/introduction
  baseURL: https://app.gc.ai/api/external/v1
  tags:
  - Utility
  properties:
  - type: OpenAPI
    url: openapi/gc-ai-utility-api-openapi.yml
  - type: Documentation
    url: https://docs.gc.ai/api-reference/introduction
  - type: APIReference
    url: https://docs.gc.ai/api-reference/introduction
common:
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/gc-ai/overview
- type: Plans
  url: plans/gc-ai-plans-pricing.yml
- url: https://gc.ai/rss.xml
  type: BlogRSS
- type: CapabilityMap
  url: capabilities/gc-ai-capability-edges.yml
  name: GC AI Business Capability Map
- type: DeveloperPortal
  url: https://docs.gc.ai/
- type: Documentation
  url: https://docs.gc.ai/
- type: APIReference
  url: https://docs.gc.ai/api-reference/introduction
- type: GettingStarted
  url: https://docs.gc.ai/guides/getting-started/first-steps
- type: HelpCenter
  url: https://docs.gc.ai/
- type: Support
  url: mailto:support@gc.ai
- type: Community
  url: https://gc.ai/slack
- type: Blog
  url: https://gc.ai/blog
- type: Pricing
  url: https://gc.ai/pricing
- type: SignUp
  url: https://app.gc.ai/signup
- type: TermsOfService
  url: https://gc.ai/terms
- type: PrivacyPolicy
  url: https://gc.ai/privacy
- type: StatusPage
  url: https://status.gc.ai
- type: ChangeLog
  url: https://docs.gc.ai/changelog
- type: ChangeLog
  url: changelog/gc-ai-changelog.yml
- type: Compliance
  url: https://trust.gc.ai/
- type: TrustCenter
  url: security/gc-ai-trust-center.yml
- type: DomainSecurity
  url: security/gc-ai-domain-security.yml
- type: Authentication
  url: authentication/gc-ai-authentication.yml
- type: Conventions
  url: conventions/gc-ai-conventions.yml
- type: RateLimits
  url: rate-limits/gc-ai-rate-limits.yml
- type: ErrorCatalog
  url: errors/gc-ai-problem-types.yml
- type: Lifecycle
  url: lifecycle/gc-ai-lifecycle.yml
- type: DataModel
  url: data-model/gc-ai-data-model.yml
- type: Conformance
  url: conformance/gc-ai-conformance.yml
- type: Overlay
  url: overlays/gc-ai-openapi-overlay.yaml
- type: MCPServer
  url: mcp/gc-ai-mcp.yml
- type: AgentSkill
  url: skills/_index.yml
- type: WellKnown
  url: well-known/gc-ai-well-known.yml
- type: LLMsTxt
  url: llms/gc-ai-llms.txt
- type: AgenticAccess
  url: agentic-access/gc-ai-agentic-access.yml
- type: Website
  url: https://gc.ai
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

GC AI API — frequently asked questions

Does GC AI have an API?

Yes. APIs.io lists 9 APIs from GC AI, including GC AI Chat API, GC AI Files API and GC AI Folders API, and 6 more.

Is there an OpenAPI specification for the GC AI API?

Yes. APIs.io indexes 9 OpenAPI specifications for GC AI, each linked for download from this page.

How do I authenticate with the GC AI API?

GC AI documents its authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Gc Ai Authentication.

Does GC AI have an MCP server?

Yes. APIs.io lists 1 MCP server for GC AI: Remote MCP server at app.gc.ai over HTTP; 58 tools listed.

Is the GC AI API ready for AI agents?

GC AI has a Kin Score of 53.4 out of 100 (developing) and an Agent Readiness score of 52.8 (agent-ready), scored by API Evangelist on 2026-10-31.

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