Contractbook

Contractbook is a contract lifecycle management (CLM) platform that turns static contracts into structured, automatable data. Its Public API v3 (base https://api.contractbook.com/v3, Bearer API-key auth) lets teams generate pre-filled contract drafts from any data source, send documents for electronic signature, manage templates, organize documents into spaces, run automations, upload attachments, and receive webhook notifications on document life-cycle events. Contractbook covers the full contract lifecycle - drafting, negotiation, signing, storage, and post-signature management - for legal, sales, HR, and procurement teams.

Contractbook publishes 7 API contracts indexed on the APIs.io network, including Attachments API, Automations API, Document sharing API, and 4 more. Tagged areas include Contract Management, Contract Lifecycle Management, Legal, E-Signature, and Contracts.

The Contractbook catalog on APIs.io includes 1 Spectral governance ruleset.

Contractbook’s developer surface includes authentication, documentation, engineering blog, and 8 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

28.2/100 thin ▬ flat Agent 32/100 agent ready Front door AI 3/6 light saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessPaid

1 published contract

Contract Management Contract Lifecycle Management Legal E-Signature Contracts Document Automation Legal Tech

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

DocumentsTemplates

GET /documents GET /documents/{id} GET /documents/{id}/pdf POST /documents/{id}/send

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 28.2/100 · thin

Contract Quality 9.3 / 19

Developer Ergonomics 4.8 / 15

Access Clarity 1.0 / 15

Operational Transparency 1.4 / 10

Contract Governance 1.2 / 9

Discoverability 5.0 / 8

Regulatory Posture 0.9 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 32/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 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 6 / 6

Agent Skills 0 / 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 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Show this score on your site.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/contractbook/"><img src="https://apis.io/badge/contractbook/card.svg" alt="Contractbook on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

Raise your score.

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

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
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) Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented) Ask about this →
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too Ask about this →

6 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 6.4 — up to +18.7 composite points Ask about this →
Developer Ergonomics scores 32.1 — up to +13.6 composite points Ask about this →
Contract Quality scores 49.8 — up to +12.6 composite points Ask about this →

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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/contractbook/apis.yml: open an issue on github.com/api-evangelist/contractbook 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 →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 7

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

Contractbook Document Webhooks

Contractbook's document life-cycle notification (webhook) mechanism. When a document is created, updated, or signed, Contractbook sends an HTTP request to a client-configured ca...

Contractbook Attachments API

The Attachments API from Contractbook — 1 operation(s) for attachments.

Contractbook Automations API

The Automations API from Contractbook — 2 operation(s) for automations.

Contractbook Document sharing API

The Document sharing API from Contractbook — 1 operation(s) for document sharing.

Contractbook Documents API

The Documents API from Contractbook — 5 operation(s) for documents.

Contractbook Spaces API

The Spaces API from Contractbook — 2 operation(s) for spaces.

Contractbook Templates API

The Templates API from Contractbook — 2 operation(s) for templates.

Scroll for all 7

Open Collections 7

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

Contractbook Attachments API

OPEN COLLECTION

Contractbook Attachments Automations API

OPEN COLLECTION

Contractbook Attachments Document sharing API

OPEN COLLECTION

Contractbook Attachments Documents API

OPEN COLLECTION

Contractbook Attachments Spaces API

OPEN COLLECTION

Contractbook Attachments Templates API

OPEN COLLECTION

Contractbook API v3

OPEN COLLECTION

Scroll for all 7

Contractbook API pricing

Not yet checked against Contractbook's own pricing page. Compiled by API Evangelist on 2026-07-11 from contractbook.com/pricing; confirm before you rely on a figure.

Plan	Price
Essential paid	—
Centralize paid	—
Accelerate paid	—
Custom / Enterprise enterprise	—

Plan details, limits and sources →

Rate limits

Public API Requests: not published (fair usage) requests
Signed Contracts: per plan (e.g. 100/350/500 per year) contracts
Templates: per plan (e.g. 5/15/25) templates

Compiled by API Evangelist, not yet checked against Contractbook's documentation. All 4 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

Contractbook Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Contractbook Rate Limits

4 limits

RATE LIMITS

FinOps 1

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

Contractbook Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

Contractbook API Rules

67 rules · 57 error-severity 7 warn-severity 3 info-severity

SPECTRAL

OpenAPI Overlays 3

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.

Contractbook Automations Api Certification Overlay

1 action · security · contractbook-automations-api-openapi.yml

DERIVED

Contractbook Documents Api Certification Overlay

1 action · security · contractbook-documents-api-openapi.yml

DERIVED

Contractbook Templates Api Certification Overlay

1 action · security · contractbook-templates-api-openapi.yml

DERIVED

Security Posture 1

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

Contractbook Authentication

http · 1 scheme

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

Contractbook Agentic Access

18 operations · 11 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Access & Security 1

Authentication, authorization, and security posture

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

SupportCenter

SupportCenter

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

aid: contractbook
url: https://raw.githubusercontent.com/api-evangelist/contractbook/refs/heads/main/apis.yml
name: Contractbook
kind: company
description: Contractbook is a contract lifecycle management (CLM) platform that turns static contracts into structured, automatable
  data. Its Public API v3 (base https://api.contractbook.com/v3, Bearer API-key auth) lets teams generate pre-filled contract
  drafts from any data source, send documents for electronic signature, manage templates, organize documents into spaces,
  run automations, upload attachments, and receive webhook notifications on document life-cycle events. Contractbook covers
  the full contract lifecycle - drafting, negotiation, signing, storage, and post-signature management - for legal, sales,
  HR, and procurement teams.
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: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  source:
  - plans
  - authentication
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/contractbook.png
x-docs-platform: stoplight
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-09-24
tags:
- Contract Management
- Contract Lifecycle Management
- Legal
- E-Signature
- Contracts
- Document Automation
- Legal Tech
tags_raw:
- Contract Management
- CLM
- Contract Lifecycle
- Legal
- eSignature
- Contracts
- Document Automation
- LegalTech
created: '2026-07-11'
modified: '2026-07-11'
specificationVersion: '0.23'
apis:
- aid: contractbook:contractbook-document-webhooks
  name: Contractbook Document Webhooks
  tags:
  - Webhook
  - Notification
  - Event
  - Contract Lifecycle Management
  tags_raw:
  - Webhooks
  - Notifications
  - Events
  - CLM
  - Contract Lifecycle
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://api.contractbook.com/v3/docs#section/Use-cases/Scenario-7.-Receiving-notifications-for-document-life-cycle-events
  baseURL: https://api.contractbook.com/v3
  properties:
  - url: https://api.contractbook.com/v3/docs
    type: Documentation
  - url: webhooks/contractbook-webhooks.yml
    type: Webhooks
  description: Contractbook's document life-cycle notification (webhook) mechanism. When a document is created, updated, or
    signed, Contractbook sends an HTTP request to a client-configured callback URL, letting integrations react to contract
    state changes instead of polling. Webhook payloads are unauthenticated by default; an access_token query parameter can
    be added to the callback URL, and recipients are advised to confirm state via an authenticated GET /documents/{id} call.
    Webhook subscriptions are configured in Contractbook rather than through documented CRUD endpoints in the Public API v3
    OpenAPI, so this API is honestly modeled from the documented notification behavior.
- aid: contractbook:contractbook-attachments-api
  name: Contractbook Attachments API
  description: The Attachments API from Contractbook — 1 operation(s) for attachments.
  humanURL: https://api.contractbook.com/v3/docs
  baseURL: https://api.contractbook.com/v3
  tags:
  - Attachments
  properties:
  - type: OpenAPI
    url: openapi/contractbook-attachments-api-openapi.yml
  - type: Documentation
    url: https://api.contractbook.com/v3/docs
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20list%20of%20documents
  - type: PostmanCollection
    url: collections/contractbook.postman_collection.json
  - type: OpenCollection
    url: collections/contractbook.opencollection.json
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20list%20of%20templates
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Share%20a%20document
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20list%20of%20automations
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20space%20tree
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Upload%20an%20attachment
- aid: contractbook:contractbook-automations-api
  name: Contractbook Automations API
  description: The Automations API from Contractbook — 2 operation(s) for automations.
  humanURL: https://api.contractbook.com/v3/docs
  baseURL: https://api.contractbook.com/v3
  tags:
  - Automation
  tags_raw:
  - Automations
  properties:
  - type: OpenAPI
    url: openapi/contractbook-automations-api-openapi.yml
  - type: Documentation
    url: https://api.contractbook.com/v3/docs
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20list%20of%20documents
  - type: PostmanCollection
    url: collections/contractbook.postman_collection.json
  - type: OpenCollection
    url: collections/contractbook.opencollection.json
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20list%20of%20templates
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Share%20a%20document
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20list%20of%20automations
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20space%20tree
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Upload%20an%20attachment
- aid: contractbook:contractbook-document-sharing-api
  name: Contractbook Document sharing API
  description: The Document sharing API from Contractbook — 1 operation(s) for document sharing.
  humanURL: https://api.contractbook.com/v3/docs
  baseURL: https://api.contractbook.com/v3
  tags:
  - Document Sharing
  tags_raw:
  - Document sharing
  properties:
  - type: OpenAPI
    url: openapi/contractbook-document-sharing-api-openapi.yml
  - type: Documentation
    url: https://api.contractbook.com/v3/docs
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20list%20of%20documents
  - type: PostmanCollection
    url: collections/contractbook.postman_collection.json
  - type: OpenCollection
    url: collections/contractbook.opencollection.json
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20list%20of%20templates
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Share%20a%20document
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20list%20of%20automations
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20space%20tree
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Upload%20an%20attachment
- aid: contractbook:contractbook-documents-api
  name: Contractbook Documents API
  description: The Documents API from Contractbook — 5 operation(s) for documents.
  humanURL: https://api.contractbook.com/v3/docs
  baseURL: https://api.contractbook.com/v3
  tags:
  - Documents
  properties:
  - type: OpenAPI
    url: openapi/contractbook-documents-api-openapi.yml
  - type: Documentation
    url: https://api.contractbook.com/v3/docs
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20list%20of%20documents
  - type: PostmanCollection
    url: collections/contractbook.postman_collection.json
  - type: OpenCollection
    url: collections/contractbook.opencollection.json
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20list%20of%20templates
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Share%20a%20document
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20list%20of%20automations
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20space%20tree
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Upload%20an%20attachment
- aid: contractbook:contractbook-spaces-api
  name: Contractbook Spaces API
  description: The Spaces API from Contractbook — 2 operation(s) for spaces.
  humanURL: https://api.contractbook.com/v3/docs
  baseURL: https://api.contractbook.com/v3
  tags:
  - Spaces
  - Space
  tags_raw:
  - Spaces
  - Space
  properties:
  - type: OpenAPI
    url: openapi/contractbook-spaces-api-openapi.yml
  - type: Documentation
    url: https://api.contractbook.com/v3/docs
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20list%20of%20documents
  - type: PostmanCollection
    url: collections/contractbook.postman_collection.json
  - type: OpenCollection
    url: collections/contractbook.opencollection.json
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20list%20of%20templates
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Share%20a%20document
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20list%20of%20automations
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20space%20tree
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Upload%20an%20attachment
- aid: contractbook:contractbook-templates-api
  name: Contractbook Templates API
  description: The Templates API from Contractbook — 2 operation(s) for templates.
  humanURL: https://api.contractbook.com/v3/docs
  baseURL: https://api.contractbook.com/v3
  tags:
  - Templates
  properties:
  - type: OpenAPI
    url: openapi/contractbook-templates-api-openapi.yml
  - type: Documentation
    url: https://api.contractbook.com/v3/docs
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20list%20of%20documents
  - type: PostmanCollection
    url: collections/contractbook.postman_collection.json
  - type: OpenCollection
    url: collections/contractbook.opencollection.json
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20list%20of%20templates
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Share%20a%20document
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20list%20of%20automations
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Get%20a%20space%20tree
  - type: APIReference
    url: https://api.contractbook.com/v3/docs#/operations/Upload%20an%20attachment
common:
- type: CapabilityMap
  url: capabilities/contractbook-capability-edges.yml
  name: Contractbook Business Capability Map
- type: AgenticAccess
  url: agentic-access/contractbook-agentic-access.yml
- type: Authentication
  url: authentication/contractbook-authentication.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/contractbook
- type: Website
  url: https://contractbook.com
- type: Documentation
  url: https://api.contractbook.com/v3/docs
- type: SupportCenter
  url: https://support.contractbook.com
- type: Plans
  url: plans/contractbook-plans-pricing.yml
- type: RateLimits
  url: rate-limits/contractbook-rate-limits.yml
- type: FinOps
  url: finops/contractbook-finops.yml
- url: https://contractbook.com/blog
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Contractbook API — frequently asked questions

Does Contractbook have an API?

Yes. APIs.io lists 7 APIs from Contractbook, including Contractbook Document Webhooks, Contractbook Attachments API and Contractbook Automations API, and 4 more.

Is there an OpenAPI specification for the Contractbook API?

Yes. APIs.io indexes 6 OpenAPI specifications for Contractbook, each linked for download from this page.

How do I authenticate with the Contractbook API?

Contractbook uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as Contractbook Authentication.

How much does the Contractbook API cost?

APIs.io lists 4 pricing plans for Contractbook, with each plan's price, limits and inclusions under Pricing on this page.

Is the Contractbook API ready for AI agents?

Contractbook has a Kin Score of 28.2 out of 100 (thin) and an Agent Readiness score of 31.5 (agent-ready), scored by API Evangelist on 2026-11-13.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/contractbook"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/contractbook/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/contractbook/evidence"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.