Notarize

Notarize (rebranded as Proof) provides Remote Online Notarization (RON), eSignature, identity verification, and reusable digital credentials through the Notarize Network. Its REST API (api.proof.com) lets businesses create notarization, eSign, Identify, and real-estate/mortgage closing transactions, attach and template documents, invite signers, manage notaries, and receive V2 webhooks for every transaction and notary state change. Authentication is by API key or OAuth 2.0 client credentials, with a Fairfax test environment for end-to-end sandbox testing. Widely used across proptech, lending, title, and legal workflows.

Notarize publishes 1 API on the APIs.io network. Tagged areas include Company, Proptech, Notarization, Remote Online Notarization, and Identity Verification.

The Notarize catalog on APIs.io includes 1 event-driven AsyncAPI specification.

Notarize’s developer surface includes documentation, API reference, getting-started guide, engineering blog, pricing, signup flow, support, and 21 more developer resources.

🌐 Visit website 📡 Source on GitHub

43.4/100 thin ▬ flat Agent 43/100 agent aware Full breakdown ↓
scored 2026-07-27 · rubric v0.5

AccessSelf serve

1 APIs 1 MCP Servers

CompanyProptechNotarizationRemote Online NotarizationIdentity VerificationeSignatureDigital CredentialsReal EstateMortgageLegal Tech

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 43.4/100 · thin

Contract Quality 5.7 / 25

Developer Ergonomics 14.8 / 20

Commercial Clarity 10.0 / 20

Operational Transparency 3.8 / 13

Governance 0.0 / 12

Discoverability 9.3 / 10

Agent readiness — 43/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 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/notarize: 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.

Proof API (formerly Notarize)

REST API for creating and managing notarization, eSign, Identify, and real-estate transactions, documents, signers, notaries, templates, and Webhooks V2 subscriptions.

MCP Servers 1

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

Scopes 1

OAuth scopes governing access to this provider's APIs.

Notarize Scopes

2 scopes · clientCredentials

2 scopes

SCOPES

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

SignUp

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

WellKnown

MCPServer

LLMsTxt

AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Webhooks

Conformance

DataModel

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 5

Authentication, authorization, and security posture

TrustCenter

DomainSecurity

Compliance

Authentication

OAuthScopes

Operate 2

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

Commercial 2

Pricing, plans, and the legal terms of use

Pricing

Pricing

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: notarize
name: Notarize
description: Notarize (rebranded as Proof) provides Remote Online Notarization (RON), eSignature, identity verification, and
  reusable digital credentials through the Notarize Network. Its REST API (api.proof.com) lets businesses create notarization,
  eSign, Identify, and real-estate/mortgage closing transactions, attach and template documents, invite signers, manage notaries,
  and receive V2 webhooks for every transaction and notary state change. Authentication is by API key or OAuth 2.0 client
  credentials, with a Fairfax test environment for end-to-end sandbox testing. Widely used across proptech, lending, title,
  and legal workflows.
url: https://raw.githubusercontent.com/api-evangelist/notarize/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- fifth-wall
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
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-20'
image: https://github.com/notarize.png
tags:
- Company
- Proptech
- Notarization
- Remote Online Notarization
- Identity Verification
- eSignature
- Digital Credentials
- Real Estate
- Mortgage
- Legal Tech
apis:
- name: Proof API (formerly Notarize)
  description: REST API for creating and managing notarization, eSign, Identify, and real-estate transactions, documents,
    signers, notaries, templates, and Webhooks V2 subscriptions.
  humanURL: https://dev.proof.com/
  baseURL: https://api.proof.com/v1
  properties:
  - type: Documentation
    url: https://dev.proof.com/docs
  - type: APIReference
    url: https://dev.proof.com/reference
  - type: GettingStarted
    url: https://dev.proof.com/docs/business-quick-start
  - type: Authentication
    url: authentication/notarize-authentication.yml
  - type: OAuthScopes
    url: scopes/notarize-scopes.yml
  - type: Webhooks
    url: asyncapi/notarize-webhooks.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: TrustCenter
  url: security/notarize-trust-center.yml
- type: DomainSecurity
  url: security/notarize-domain-security.yml
- type: Website
  url: https://www.proof.com/
- type: DeveloperPortal
  url: https://dev.proof.com/
- type: Documentation
  url: https://dev.proof.com/docs
- type: APIReference
  url: https://dev.proof.com/reference
- type: GettingStarted
  url: https://dev.proof.com/docs/business-quick-start
- type: Blog
  url: https://www.proof.com/blog
- type: Pricing
  url: https://www.proof.com/pricing
- type: SignUp
  url: https://app.proof.com/
- type: PrivacyPolicy
  url: https://www.proof.com/legal/privacy-policy
- type: Support
  url: mailto:support@proof.com
- type: GitHubOrganization
  url: https://github.com/notarize
- type: StatusPage
  url: https://status.proof.com
- type: Compliance
  url: https://security.proof.com/
- type: Authentication
  url: authentication/notarize-authentication.yml
- type: OAuthScopes
  url: scopes/notarize-scopes.yml
- type: Conventions
  url: conventions/notarize-conventions.yml
- type: ErrorCatalog
  url: errors/notarize-error-codes.yml
- type: Lifecycle
  url: lifecycle/notarize-lifecycle.yml
- type: Sandbox
  url: sandbox/notarize-sandbox.yml
- type: Webhooks
  url: asyncapi/notarize-webhooks.yml
- type: Conformance
  url: conformance/notarize-conformance.yml
- type: WellKnown
  url: well-known/notarize-well-known.yml
- type: MCPServer
  url: mcp/notarize-mcp.yml
- type: LLMsTxt
  url: llms/notarize-llms.txt
- type: DataModel
  url: data-model/notarize-data-model.yml
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 19
  pass: local-v1