Clerk.io website screenshot

Clerk.io

Clerk.io is an e-commerce personalization platform that uses artificial intelligence and machine learning to deliver tailored product recommendations, on-site search results, audience-segmented email campaigns, and merchandising controls for online retailers. The platform exposes a REST API for product, category, order, and customer data ingestion, plus client-side JavaScript and Liquid templating for recommendation slots and search experiences.

Clerk.io publishes 1 API on the APIs.io network. Tagged areas include Artificial Intelligence, Commerce, E-Commerce, Email Marketing, and Personalization.

The Clerk.io catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Clerk.io’s developer surface includes authentication, documentation, engineering blog, pricing, API reference, getting-started guide, support, and 34 more developer resources.

60.3/100 strong ▬ flat Agent 42/100 agent ready Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0
2 APIs 1 MCP Servers
Artificial IntelligenceCommerceE-CommerceEmail MarketingPersonalizationRecommendationsSearch

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0
Composite quality — 60.3/100 · strong
Contract Quality 15.6 / 25
Developer Ergonomics 9.4 / 20
Access Clarity 20.0 / 20
Operational Transparency 0.3 / 13
Contract Governance 7.5 / 12
Discoverability 7.6 / 10
Agent readiness — 42/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 7 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 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
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/clerk-io: 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 2

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

Clerk.io API

The Clerk.io API provides REST endpoints for managing products, categories, orders, customers, recommendations, and search. The API uses a dual-key authentication model: a publi...

Clerk.js Client Library

Clerk.js is the browser-side JavaScript library for embedding Clerk.io recommendation slots, search, and email opens on a storefront, with Liquid templating support and event tr...

Open Collections 1

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

Clerk.io API

OPEN COLLECTION

MCP Servers 1

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

Pricing Plans 1

Published pricing tiers and plan structures.

Rate Limits 1

Documented rate limits and quota policies.

Clerk Io Rate Limits

0 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Clerk Io Context

0 classes · 5 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Clerk.io API Rules

8 rules · 4 errors 4 warnings

SPECTRAL

Security Posture 3

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

Clerk Io Authentication

apiKey · 3 schemes

SECURITY

Clerk Io Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Clerk Io Trust Center

SOC 2, ISO 27001, GDPR

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

Documentation 2

Reference material describing how the API behaves

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

Design & Contract 8

Pagination, idempotency, versioning, errors, and events

Scroll for all 8

Build 4

SDKs, sample code, and the tooling you integrate with

Access & Security 5

Authentication, authorization, and security posture

Operate 3

Status, limits, changes, and where to get help

Commercial 5

Pricing, plans, and the legal terms of use

Company 4

The organization behind the API

Other 2

Properties that don't map to a standard resource type

Source (apis.yml)

apis.yml Raw ↑
aid: clerk-io
name: Clerk.io
url: https://raw.githubusercontent.com/api-evangelist/clerk-io/refs/heads/main/apis.yml
accessModel:
  pricing: usage-based
  onboarding: signup-required
  trial: true
  trial_url: https://www.clerk.io/free-trial
  try_now: false
  public: false
  label: Usage-Based
  confidence: high
  source:
  - https://www.clerk.io/pricing
  - https://www.clerk.io/free-trial
  - plans/clerk-io-plans-pricing.yml
  generated: '2026-08-13'
  method: searched
  note: 'Corrected 2026-08-13. The prior derived block read "freemium / trial: false" from a fabricated plans scaffold. Clerk.io
    sells five metered products a la carte with no free tier and no named subscription tiers, and does offer a free trial.
    Per-band prices are calculator-only and are not published in machine-readable form.'
created: '2025-02-08'
modified: '2026-08-13'
type: Index
access: 3rd-Party
position: Consumer
specificationVersion: '0.23'
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/clerk-io.png
kind: company
tags:
- Artificial Intelligence
- Commerce
- E-Commerce
- Email Marketing
- Personalization
- Recommendations
- Search
tags_raw:
- AI
- Commerce
- E-Commerce
- Email Marketing
- Personalization
- Recommendations
- Search
description: Clerk.io is an e-commerce personalization platform that uses artificial intelligence and machine learning to
  deliver tailored product recommendations, on-site search results, audience-segmented email campaigns, and merchandising
  controls for online retailers. The platform exposes a REST API for product, category, order, and customer data ingestion,
  plus client-side JavaScript and Liquid templating for recommendation slots and search experiences.
apis:
- aid: clerk-io:clerk-io-api
  name: Clerk.io API
  tags:
  - Commerce
  - Personalization
  - Recommendations
  - Search
  humanURL: https://docs.clerk.io/
  baseURL: https://api.clerk.io/v2
  properties:
  - url: openapi/clerk-io-openapi.yml
    type: OpenAPI
  - url: openapi/_original/clerk-io-api-settings-openapi-original.yml
    type: OpenAPI
  - url: overlays/clerk-io-api-overlay.yaml
    type: Overlay
  - url: mcp/clerk-io-tool-crosswalk.yml
    type: ToolCrosswalk
  - url: https://docs.clerk.io/
    type: Documentation
  - url: https://docs.clerk.io/reference
    type: APIReference
  - url: https://docs.clerk.io/docs/how-the-clerkio-platform-works
    type: GettingStarted
  - url: https://docs.clerk.io/docs/authentication
    type: Authentication
  - url: https://docs.clerk.io/docs/errors
    type: ErrorCodes
  - url: https://docs.clerk.io/docs/pagenation
    type: Pagination
  description: 'The Clerk.io API provides REST endpoints for managing products, categories, orders, customers, recommendations,
    and search. The API uses a dual-key authentication model: a public key identifies the store and is used in browser-side
    requests, while a private key is required for sensitive operations and data ingestion. JSON is the primary payload format
    and SSL is required when sending the private key. Clerk.io publishes an OpenAPI 3.1.0 definition of 65 paths and 101 operations
    through its ReadMe developer portal, covering catalog ingestion, search, twenty-five recommendation logics, behavioural
    logging, merchandising, audiences and GDPR privacy requests.'
- aid: clerk-io:clerkjs
  name: Clerk.js Client Library
  tags:
  - Client Library
  - JavaScript
  humanURL: https://docs.clerk.io/docs/clerkjs-quick-start
  baseURL: https://api.clerk.io/v2
  properties:
  - url: https://docs.clerk.io/docs/clerkjs-quick-start
    type: Documentation
  - url: https://cdn.clerk.io/clerk.js
    type: SourceCode
  - url: https://docs.clerk.io/docs/clerkjs-cdn
    type: CDN
  - url: components/clerk-io-components.yml
    type: Components
  description: Clerk.js is the browser-side JavaScript library for embedding Clerk.io recommendation slots, search, and email
    opens on a storefront, with Liquid templating support and event tracking.
common:
- type: Authentication
  url: authentication/clerk-io-authentication.yml
- type: TrustCenter
  url: security/clerk-io-trust-center.yml
- type: DomainSecurity
  url: security/clerk-io-domain-security.yml
- type: GitHubOrganization
  url: https://github.com/clerkio
- type: LinkedIn
  url: https://www.linkedin.com/company/clerk-io
- type: Website
  url: https://www.clerk.io/
- type: Documentation
  url: https://docs.clerk.io/
- type: Knowledgebase
  url: https://help.clerk.io/
- type: StatusPage
  url: https://status.clerk.io/
- type: Blog
  url: https://www.clerk.io/blogs
- type: Pricing
  url: https://www.clerk.io/pricing
- type: Partners
  url: https://www.clerk.io/partners
- type: Integrations
  url: https://www.clerk.io/integrations
- type: Trust Center
  url: https://trust.clerk.io/
- type: TermsOfService
  url: https://www.clerk.io/terms-of-service
- type: PrivacyPolicy
  url: https://www.clerk.io/privacy
- type: JSONLD
  url: json-ld/clerk-io-context.jsonld
- type: Spectral
  url: rules/clerk-io-rules.yml
- type: LlmsText
  url: https://docs.clerk.io/llms.txt
- type: LLMsTxt
  url: llms/clerk-io-llms.txt
- type: DeveloperPortal
  url: https://docs.clerk.io/
- type: APIReference
  url: https://docs.clerk.io/reference
- type: GettingStarted
  url: https://docs.clerk.io/docs/how-the-clerkio-platform-works
- type: Support
  url: https://help.clerk.io/
- type: SignUp
  url: https://www.clerk.io/free-trial
- type: Login
  url: https://my.clerk.io/
- type: Packages
  url: packages/clerk-io-packages.yml
- type: SDKs
  url: packages/clerk-io-packages.yml
- type: MCPServer
  url: mcp/clerk-io-mcp.yml
- type: ToolCrosswalk
  url: mcp/clerk-io-tool-crosswalk.yml
- type: Overlay
  url: overlays/clerk-io-api-overlay.yaml
- type: Conformance
  url: conformance/clerk-io-conformance.yml
- type: Compliance
  url: https://trust.clerk.io/
- type: ErrorCatalog
  url: errors/clerk-io-problem-types.yml
- type: Lifecycle
  url: lifecycle/clerk-io-lifecycle.yml
- type: Conventions
  url: conventions/clerk-io-conventions.yml
- type: DataModel
  url: data-model/clerk-io-data-model.yml
- type: Components
  url: components/clerk-io-components.yml
- type: Plans
  url: plans/clerk-io-plans-pricing.yml
- type: RateLimits
  url: rate-limits/clerk-io-rate-limits.yml
- type: FinOps
  url: finops/clerk-io-finops.yml
- type: AgentSkill
  url: skills/_index.yml
integrations:
- name: cler.io
- name: Heart
- name: Icon symbolizing AI
- name: People icon, symbolizing audience
- name: Envelope icon symbolizing email
- name: Icon symbolizing a platform
- name: Reviews
- name: Icon symbolizing integration process
- name: Icon symbolizing integrations
- name: people
- name: Icon of a graph symbolizing verticals
- name: Icon symbolizing careers
- name: Handshake icon symbolizing partnerships
- name: Book icon symbolizing knowledge
- name: shield orange
- name: people orange
- name: interrogation orange
- name: book orange
- name: play orange
- name: shopify
- name: magneto
- name: big comemrce
- name: shopware
- name: woo commerce
- name: presta shop
- name: dandomain
- name: lightspeed
- name: smartweb
- name: shoporama
- name: JTL
- name: clerk.io
maintainers:
- FN: Kin Lane
  email: kinlane@gmail.com
x-enrichment:
  date: '2026-08-13'
  status: enriched
  artifacts_added: 21
  pass: local-v1
x-coverage:
  state: covered
  reason: covered
  detail: Clerk.io publishes a real OpenAPI 3.1.0 - 65 paths, 101 operations, servers https://api.clerk.io/v2 - through its
    ReadMe developer portal, plus a verbatim llms.txt and a remote (auth-gated) MCP endpoint at https://docs.clerk.io/mcp.
    The prior round had only a 20-operation best-effort spec hand-written from the docs and no contract pointer at all.
  evidence:
  - url: https://docs.clerk.io/reference/products-post
    status: 200
  - url: https://docs.clerk.io/llms.txt
    status: 200
  - url: https://docs.clerk.io/mcp
    status: 200
  - url: https://api.clerk.io/openapi.json
    status: 404
  checked: '2026-08-13'