Agari website screenshot

Agari

Agari is an email-security provider that pioneered and helped author the DMARC email-authentication standard to protect organizations from phishing, business email compromise (BEC), email spoofing, and brand impersonation. Founded in 2009, Agari was acquired by HelpSystems (now Fortra) in May 2021 and is delivered as Fortra's email-security portfolio, including DMARC Protection / Brand Protection, Phishing Defense, and Phishing Response. The Agari Platform exposes a RESTful JSON API secured with OAuth 2.0 Client Credentials for retrieving security telemetry, auditing users and domains, tracking DMARC policy enforcement, and integrating Agari data into SIEM and SOAR tooling. It was originally backed by Norwest Venture Partners and other venture investors before its acquisition.

Agari is listed with 1 API on the APIs.io network. Tagged areas include Company, Email Security, Cybersecurity, DMARC, and Email Authentication.

Agari’s developer surface includes engineering blog, documentation, API reference, getting-started guide, authentication, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub
16.3/100 emerging ▬ flat Agent 5/100 agent aware Full breakdown ↓
scored 2026-10-09 · rubric v0.23.0
AccessSelf serve
1 API
CompanyEmail SecurityCybersecurityDMARCEmail AuthenticationPhishingAnti-PhishingBrand ProtectionREST

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-09 · rubric v0.23.0
Composite quality — 16.3/100 · emerging
Contract Quality 0.0 / 21
Developer Ergonomics 5.7 / 17
Access Clarity 0.0 / 17
Operational Transparency 0.0 / 11
Contract Governance 1.9 / 10
Discoverability 6.2 / 9
Regulatory Posture 2.5 / 15
Agent readiness — 5/100 · agent aware
Machine-Readable Contract 0 / 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 0 / 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
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/.
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/agari: 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 →

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.

REST
tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

APIs 1

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

Agari Platform API

RESTful JSON API for the Agari Platform, secured with OAuth 2.0 Client Credentials. Provides access to Agari email-security telemetry — alerts, domain tracking, DMARC policy-enf...

Security Posture 2

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

Agari Authentication

oauth2 · 1 scheme

SECURITY

Agari Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Conventions
Conventions
 ErrorCatalog
ErrorCatalog
 Conformance
Conformance
 Lifecycle
Lifecycle

Access & Security 2

Authentication, authorization, and security posture

Authentication
Authentication
 DomainSecurity
DomainSecurity

Company 2

The organization behind the API

Blog
Blog
 Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: agari
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  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
  - url: https://agari.com
    status: 301
    note: declared website redirects to https://www.fortra.com/platform/email-security — a different registrable domain (agari.com
      -> fortra.com), possible rename or acquisition (probed 2026-09-03, roadmap#169)
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/agari.png
name: Agari
description: Agari is an email-security provider that pioneered and helped author the DMARC email-authentication standard
  to protect organizations from phishing, business email compromise (BEC), email spoofing, and brand impersonation. Founded
  in 2009, Agari was acquired by HelpSystems (now Fortra) in May 2021 and is delivered as Fortra's email-security portfolio,
  including DMARC Protection / Brand Protection, Phishing Defense, and Phishing Response. The Agari Platform exposes a RESTful
  JSON API secured with OAuth 2.0 Client Credentials for retrieving security telemetry, auditing users and domains, tracking
  DMARC policy enforcement, and integrating Agari data into SIEM and SOAR tooling. It was originally backed by Norwest Venture
  Partners and other venture investors before its acquisition.
url: https://raw.githubusercontent.com/api-evangelist/agari/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- norwest-venture-partners
x-tier: stub
x-tier-reason: portfolio-lead
x-acquired-by: fortra
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-10-06'
x-docs-platform: readme
x-docs-platform-confidence: high
x-docs-platform-checked: 2026-09-17
tags:
- Company
- Email Security
- Cybersecurity
- DMARC
- Email Authentication
- Phishing
- Anti-Phishing
- Brand Protection
- REST
tags_raw:
- Company
- Email Security
- Cybersecurity
- DMARC
- Email Authentication
- Phishing
- Anti-Phishing
- Brand Protection
- API
- REST
apis:
- name: Agari Platform API
  description: RESTful JSON API for the Agari Platform, secured with OAuth 2.0 Client Credentials. Provides access to Agari
    email-security telemetry — alerts, domain tracking, DMARC policy-enforcement reporting, and user/domain auditing — with
    standard pagination, sorting, filtering, and searching, for integration into SIEM/SOAR workflows.
  humanURL: https://developers.agari.com/agari-platform
  baseURL: https://api.agari.com/v1
  properties:
  - type: Documentation
    url: https://developers.agari.com/agari-platform/docs
  - type: APIReference
    url: https://developers.agari.com/agari-platform/reference/overview
  - type: GettingStarted
    url: https://developers.agari.com/agari-platform/docs/quick-start
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- url: https://www.fortra.com/blog
  type: Blog
- type: Website
  url: https://agari.com
- type: DeveloperPortal
  url: https://developers.agari.com/agari-platform
- type: Documentation
  url: https://developers.agari.com/agari-platform/docs
- type: APIReference
  url: https://developers.agari.com/agari-platform/reference/overview
- type: GettingStarted
  url: https://developers.agari.com/agari-platform/docs/quick-start
- type: Authentication
  url: authentication/agari-authentication.yml
- type: Conventions
  url: conventions/agari-conventions.yml
- type: ErrorCatalog
  url: errors/agari-problem-types.yml
- type: Conformance
  url: conformance/agari-conformance.yml
- type: Lifecycle
  url: lifecycle/agari-lifecycle.yml
- type: DomainSecurity
  url: security/agari-domain-security.yml
- type: LLMsTxt
  url: llms/agari-llms.txt
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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