Mason

Mason (getmason.io), the company behind the ModeMagic Shopify app, is an AI-powered "agentic shopping engine" for ecommerce brands. Built by Kubric, the platform pairs merchandising, promotion, conversion and gamification AI agents with a developer platform for programmatic creative generation and commerce automation. Its public developer hub at getmason.dev documents a REST API (OAuth2 bearer, base host https://api.getmason.io) spanning app provisioning, template-driven image/creative generation (Genie), long-running creative tasks, asset search, webhook subscriptions, and a promotion/discount engine (Scrooge) for tiered, bulk and Buy-X-Get-Y discounts, plus a custom-checkout integration contract. Surfaced as a portfolio company of Accel, GGV Capital, Point Nine and Y Combinator; this profile was enriched by the API Evangelist pipeline from Mason's published OpenAPI, llms.txt and developer documentation.

Mason publishes 8 APIs on the APIs.io network, including Apps API, Create Image API, Images API, and 5 more. Tagged areas include Company, E-Commerce, Commerce, Artificial Intelligence, and Agents.

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

Mason’s developer surface includes authentication, documentation, API reference, getting-started guide, changelog, engineering blog, pricing, and 23 more developer resources.

🌐 Visit website 📡 Source on GitHub

41.1/100 developing ▬ flat Agent 33/100 agent ready saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessSelf serve

6 APIs

Company E-Commerce Commerce Artificial Intelligence Agents Content Generation Discounts Promotions Webhook Shopify

Kin Score

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

Composite quality — 41.1/100 · developing

Contract Quality 13.2 / 23

Developer Ergonomics 6.3 / 18

Access Clarity 6.9 / 18

Operational Transparency 3.4 / 12

Contract Governance 0.5 / 11

Discoverability 7.3 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 33/100 · 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 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 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.

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/mason: 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 8

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

Mason Apps API

The Apps API from Mason — 2 operation(s) for apps.

Mason Create Image API

The Create Image API from Mason — 1 operation(s) for create image.

Mason Images API

The Images API from Mason — 2 operation(s) for images.

Mason Retrieve an Image API

The Retrieve an Image API from Mason — 1 operation(s) for retrieve an image.

Mason Search API

The Search API from Mason — 1 operation(s) for search.

Mason Template Mappings API

The Template Mappings API from Mason — 1 operation(s) for template mappings.

Mason Tiered Discounts API

The Tiered Discounts API from Mason — 4 operation(s) for tiered discounts.

Mason Webhooks API

The Webhooks API from Mason — 2 operation(s) for webhooks.

Scroll for all 8

Open Collections 9

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

API Collection

OPEN COLLECTION

Mason Apps API

OPEN COLLECTION

Mason Apps Create Image API

OPEN COLLECTION

Mason Apps Images API

OPEN COLLECTION

Mason Apps Retrieve an Image API

OPEN COLLECTION

Mason Apps Search API

OPEN COLLECTION

Mason Apps Template Mappings API

OPEN COLLECTION

Mason Apps Tiered Discounts API

OPEN COLLECTION

Mason Apps Webhooks API

OPEN COLLECTION

Scroll for all 9

Event Specifications 1

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

Mason Webhooks

ASYNCAPI

Security Posture 3

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

Mason Authentication

oauth2 · 1 scheme

SECURITY

Mason Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Mason Vulnerability Disclosure

disclosure policy published

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Mason Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Agentic Access 1

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

Mason Agentic Access

16 operations · 11 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LLMsTxt

LLMsTxt

X-MCPServerCandidate

X-MCPServerCandidate

WellKnown

WellKnown

AgentSkill

AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

ErrorCatalog

Conventions

DataModel

Webhooks

Conformance

Lifecycle

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 5

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

DomainSecurity

OAuthScopes

Authentication

Operate 2

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

ChangeLog

ChangeLog

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: mason
name: Mason
description: Mason (getmason.io), the company behind the ModeMagic Shopify app, is an AI-powered "agentic shopping engine"
  for ecommerce brands. Built by Kubric, the platform pairs merchandising, promotion, conversion and gamification AI agents
  with a developer platform for programmatic creative generation and commerce automation. Its public developer hub at getmason.dev
  documents a REST API (OAuth2 bearer, base host https://api.getmason.io) spanning app provisioning, template-driven image/creative
  generation (Genie), long-running creative tasks, asset search, webhook subscriptions, and a promotion/discount engine (Scrooge)
  for tiered, bulk and Buy-X-Get-Y discounts, plus a custom-checkout integration contract. Surfaced as a portfolio company
  of Accel, GGV Capital, Point Nine and Y Combinator; this profile was enriched by the API Evangelist pipeline from Mason's
  published OpenAPI, llms.txt and developer documentation.
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: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://media.getmason.io/api/assetlib/e5067013-1809-44f3-8847-8d66857625c7.png
url: https://raw.githubusercontent.com/api-evangelist/mason/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- accel
- ggv-capital
- point-nine
- y-combinator
x-tier: enriched
x-tier-reason: has-public-api
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 31
  pass: local-v1
tags:
- Company
- E-Commerce
- Commerce
- Artificial Intelligence
- Agents
- Content Generation
- Discounts
- Promotions
- Webhook
- Shopify
tags_raw:
- Company
- Ecommerce
- Commerce
- AI
- Agents
- Content Generation
- Discounts
- Promotions
- Webhooks
- Shopify
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: mason:mason-apps-api
  name: Mason Apps API
  description: The Apps API from Mason — 2 operation(s) for apps.
  humanURL: https://www.getmason.dev/reference
  baseURL: https://api.getmason.io
  tags:
  - Application
  tags_raw:
  - Apps
  properties:
  - type: OpenAPI
    url: openapi/mason-apps-api-openapi.yml
- aid: mason:mason-create-image-api
  name: Mason Create Image API
  description: The Create Image API from Mason — 1 operation(s) for create image.
  humanURL: https://www.getmason.dev/reference
  baseURL: https://api.getmason.io
  tags:
  - CreateImage
  tags_raw:
  - Create Image
  properties:
  - type: OpenAPI
    url: openapi/mason-create-image-api-openapi.yml
- aid: mason:mason-images-api
  name: Mason Images API
  description: The Images API from Mason — 2 operation(s) for images.
  humanURL: https://www.getmason.dev/reference
  baseURL: https://api.getmason.io
  tags:
  - Image
  tags_raw:
  - Images
  properties:
  - type: OpenAPI
    url: openapi/mason-images-api-openapi.yml
- aid: mason:mason-retrieve-an-image-api
  name: Mason Retrieve an Image API
  description: The Retrieve an Image API from Mason — 1 operation(s) for retrieve an image.
  humanURL: https://www.getmason.dev/reference
  baseURL: https://api.getmason.io
  tags:
  - Retrieve an Image
  properties:
  - type: OpenAPI
    url: openapi/mason-retrieve-an-image-api-openapi.yml
- aid: mason:mason-search-api
  name: Mason Search API
  description: The Search API from Mason — 1 operation(s) for search.
  humanURL: https://www.getmason.dev/reference
  baseURL: https://api.getmason.io
  tags:
  - Search
  properties:
  - type: OpenAPI
    url: openapi/mason-search-api-openapi.yml
- aid: mason:mason-template-mappings-api
  name: Mason Template Mappings API
  description: The Template Mappings API from Mason — 1 operation(s) for template mappings.
  humanURL: https://www.getmason.dev/reference
  baseURL: https://api.getmason.io
  tags:
  - Template Mappings
  properties:
  - type: OpenAPI
    url: openapi/mason-template-mappings-api-openapi.yml
- aid: mason:mason-tiered-discounts-api
  name: Mason Tiered Discounts API
  description: The Tiered Discounts API from Mason — 4 operation(s) for tiered discounts.
  humanURL: https://www.getmason.dev/reference
  baseURL: https://api.getmason.io
  tags:
  - Tiered Discounts
  properties:
  - type: OpenAPI
    url: openapi/mason-tiered-discounts-api-openapi.yml
- aid: mason:mason-webhooks-api
  name: Mason Webhooks API
  description: The Webhooks API from Mason — 2 operation(s) for webhooks.
  humanURL: https://www.getmason.dev/reference
  baseURL: https://api.getmason.io
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/mason-webhooks-api-openapi.yml
common:
- type: Overlay
  url: overlays/mason-apps-overlay.yaml
- type: VulnerabilityDisclosure
  url: security/mason-vulnerability-disclosure.yml
- type: Security
  url: https://getmason.io/security/
- type: DomainSecurity
  url: security/mason-domain-security.yml
- type: AgenticAccess
  url: agentic-access/mason-agentic-access.yml
- type: OAuthScopes
  url: scopes/mason-scopes.yml
- type: Authentication
  url: authentication/mason-authentication.yml
- type: Website
  url: https://getmason.io/
- type: DeveloperPortal
  url: https://www.getmason.dev/
- type: Documentation
  url: https://www.getmason.dev/
- type: APIReference
  url: https://www.getmason.dev/reference
- type: GettingStarted
  url: https://www.getmason.dev/docs/getting-to-know-mason
- type: ChangeLog
  url: https://www.getmason.dev/changelog
- type: Blog
  url: https://getmason.io/feed/
- type: Pricing
  url: https://getmason.io/pricing/
- type: Login
  url: https://app.getmason.io/login
- type: TermsOfService
  url: https://getmason.io/termsofuse/
- type: PrivacyPolicy
  url: https://getmason.io/privacypolicy/
- type: GitHubOrganization
  url: https://github.com/kubric
- type: LLMsTxt
  url: llms/mason-llms.txt
- type: ErrorCatalog
  url: errors/mason-problem-types.yml
- type: Conventions
  url: conventions/mason-conventions.yml
- type: DataModel
  url: data-model/mason-data-model.yml
- type: Webhooks
  url: asyncapi/mason-webhooks.yml
- type: X-MCPServerCandidate
  url: mcp/mason-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: Conformance
  url: conformance/mason-conformance.yml
- type: WellKnown
  url: well-known/mason-well-known.yml
- type: Lifecycle
  url: lifecycle/mason-lifecycle.yml
- type: ChangeLog
  url: changelog/mason-changelog.yml
- type: AgentSkill
  url: skills/_index.yml

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