Gumroad

Gumroad is a digital commerce platform that lets creators sell e-books, courses, software, memberships, music, and physical goods directly to their audience without needing a storefront, with built-in checkout, licensing, affiliate management, and analytics. The Gumroad v2 REST API provides programmatic access to products, sales, subscribers, offer codes, license keys, customers, and the authenticated user account. Authentication uses OAuth 2.0 access tokens passed in the Authorization header.

Gumroad is listed with 1 API on the APIs.io network: v2 API. Tagged areas include Digital Commerce, Creator Economy, Digital Products, Membership, and License Keys.

Gumroad’s developer surface includes engineering blog, documentation, pricing, signup flow, support, and 6 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

23.6/100 emerging ▬ flat Agent 17/100 agent aware Front door AI 1/6 silent Heartbeat 0/100 dormant saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 API

Digital Commerce Creator Economy Digital Products Membership License Keys Affiliates E-Commerce

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 23.6/100 · emerging

Contract Quality 8.5 / 21

Developer Ergonomics 2.8 / 17

Access Clarity 4.0 / 17

Operational Transparency 0.3 / 11

Contract Governance 0.0 / 10

Discoverability 5.6 / 9

Regulatory Posture 0.9 / 15

Agent readiness — 17/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 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 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/.

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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
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0

11 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 16.7 — up to +16.7 composite points
Access Clarity scores 23.7 — up to +15.3 composite points
Contract Quality scores 40.0 — up to +15.0 composite points

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.

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

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Raycast Store Extensions (first-party publishers + community-wrapped products)	covered	8.5	-	-
IFTTT Services (service publishers)	covered	8.5	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

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.

AsyncAPI

measured — observed by APIs.io (published)

APIs 1

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

Gumroad v2 API

REST API for managing products, variants, offer codes, custom fields, sales, subscribers, license keys, resource subscriptions (webhooks), and the authenticated user account on ...

Security Posture 1

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

Gumroad Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Signup

Signup

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Help Center

Help Center

Support

Support

Commercial 1

Pricing, plans, and the legal terms of use

Pricing

Pricing

Company 3

The organization behind the API

Blog

Blog

LinkedIn

Website

Website

Other 1

Properties that don't map to a standard resource type

Discover

Discover

Source (apis.yml)

aid: gumroad
name: Gumroad
description: Gumroad is a digital commerce platform that lets creators sell e-books, courses, software, memberships, music,
  and physical goods directly to their audience without needing a storefront, with built-in checkout, licensing, affiliate
  management, and analytics. The Gumroad v2 REST API provides programmatic access to products, sales, subscribers, offer codes,
  license keys, customers, and the authenticated user account. Authentication uses OAuth 2.0 access tokens passed in the Authorization
  header.
type: Index
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: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/gumroad.png
tags:
- Digital Commerce
- Creator Economy
- Digital Products
- Membership
- License Keys
- Affiliates
- E-Commerce
tags_raw:
- Digital Commerce
- Creator Economy
- Digital Products
- Memberships
- License Keys
- Affiliates
- E-commerce
url: https://raw.githubusercontent.com/api-evangelist/gumroad/refs/heads/main/apis.yml
created: '2026-05-11'
modified: '2026-10-06'
specificationVersion: '0.23'
apis:
- aid: gumroad:v2-api
  name: Gumroad v2 API
  description: REST API for managing products, variants, offer codes, custom fields, sales, subscribers, license keys, resource
    subscriptions (webhooks), and the authenticated user account on Gumroad. Authentication is via OAuth 2.0 access tokens
    obtained at https://gumroad.com/oauth/applications and exchanged at https://api.gumroad.com/oauth/token.
  humanURL: https://app.gumroad.com/api
  baseURL: https://api.gumroad.com/v2
  tags:
  - Product
  - Sales
  - Subscribers
  - License Keys
  - Offer Codes
  - Webhook
  - OAuth
  - Authentication
  tags_raw:
  - Products
  - Sales
  - Subscribers
  - License Keys
  - Offer Codes
  - Webhooks
  - OAuth 2.0
  - Authentication
  properties:
  - type: Documentation
    url: https://app.gumroad.com/api
  - type: Create an Application
    url: https://gumroad.com/help/article/280-create-application-api
  - type: OAuth Applications
    url: https://gumroad.com/oauth/applications
  - type: AsyncAPI
    url: https://raw.githubusercontent.com/api-evangelist/gumroad/refs/heads/main/asyncapi.yml
common:
- url: https://gumroad.com/blog
  type: Blog
- type: DomainSecurity
  url: security/gumroad-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/gumroad
- type: Website
  url: https://gumroad.com
- type: Documentation
  url: https://app.gumroad.com/api
- type: Help Center
  url: https://gumroad.com/help
- type: Pricing
  url: https://gumroad.com/pricing
- type: Signup
  url: https://gumroad.com/signup
- type: Discover
  url: https://gumroad.com/discover
- type: Support
  url: https://gumroad.com/help
- type: GitHubOrganization
  url: https://github.com/gumroad
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Gumroad API — frequently asked questions

Does Gumroad have an API?

Yes. APIs.io lists 1 API from Gumroad, including Gumroad v2 API.

Is the Gumroad API ready for AI agents?

Gumroad has a Kin Score of 23.6 out of 100 (emerging) and an Agent Readiness score of 16.8 (agent-aware), scored by API Evangelist on 2026-11-06.

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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.
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