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

38.8/100 thin ▬ flat Agent 28/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessSelf serve

1 APIs

Company PropTech NotarizationRemote Online NotarizationIdentity Verification E-Signature Digital Credentials Real-Estate Mortgage Legal Tech

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 38.8/100 · thin

Contract Quality 10.4 / 25

Developer Ergonomics 9.4 / 20

Access Clarity 5.8 / 20

Operational Transparency 3.4 / 13

Contract Governance 2.2 / 12

Discoverability 7.6 / 10

Agent readiness — 28/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 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 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 6 / 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 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

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.

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 github.com/api-evangelist/notarize: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

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.

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Notarize Webhooks

ASYNCAPI

Security Posture 3

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

Notarize Authentication

apiKey/oauth2 · 2 schemes

SECURITY

Notarize Domain Security

TLSv1.2 · HSTS · DNSSEC · DMARC

SECURITY

Notarize Trust Center

SOC 2, ISO 27001, ISO 27017, ISO 27018, HIPAA, FedRAMP, GDPR

SECURITY

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

WellKnown

X-MCPServerCandidate

X-MCPServerCandidate

LLMsTxt

LLMsTxt

AgentSkill

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
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
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: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
image: https://github.com/notarize.png
tags:
- Company
- PropTech
- Notarization
- Remote Online Notarization
- Identity Verification
- E-Signature
- Digital Credentials
- Real-Estate
- Mortgage
- Legal Tech
tags_raw:
- 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: X-MCPServerCandidate
  url: mcp/notarize-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- 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

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