StockX

StockX is a global online marketplace for sneakers, streetwear, electronics, collectibles, and trading cards, operating on a live bid/ask model similar to a stock exchange. The StockX Public API (v2.0.0) lets approved developers in the StockX Developer Program search the product catalog, read live market data (bids/asks), create and manage seller listings individually or in bulk via asynchronous batch operations, and track sales orders and their shipping documents. Requests authenticate with an x-api-key header plus an OAuth 2.0 bearer token issued by StockX's Auth0 tenant. StockX was surfaced as a portfolio company of Battery Ventures and GV.

StockX publishes 4 API contracts indexed on the APIs.io network, including Batch API, Catalog API, Listings API, and 1 more. Tagged areas include Company, Marketplace, E-Commerce, Sneakers, and Streetwear.

The StockX catalog on APIs.io includes 1 Spectral governance ruleset.

StockX’s developer surface includes documentation, API reference, getting-started guide, authentication, changelog, engineering blog, support, and 22 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

51.9/100 developing ▬ flat Agent 41/100 agent ready Heartbeat 0/100 dormant saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 published contract 4 Agent Skills

Company Marketplace E-Commerce Sneakers Streetwear Resale Collectibles Catalog Selling Order Fashion

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Consumer Commerce

AE-140

Listings

POST /selling/listings PUT /selling/listings/{listingId}/activate

Kin Score

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

Composite quality — 51.9/100 · developing

Contract Quality 11.2 / 19

Developer Ergonomics 8.8 / 15

Access Clarity 5.1 / 15

Operational Transparency 3.9 / 10

Contract Governance 2.9 / 9

Discoverability 5.5 / 8

Regulatory Posture 5.1 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 41/100 · 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 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

Delegated User Identity 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 0 / 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 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.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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
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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too
Pagination +5 pts — share of collection GETs (an array, or one wrapped in data/items/results ...) that declare a page/limit/offset/cursor parameter, a Link header or a next/cursor field; na with no collection GETs

5 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 34.2 — up to +13.2 composite points
Contract Quality scores 59.5 — up to +10.1 composite points
Developer Ergonomics scores 58.9 — up to +8.2 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/stockx/apis.yml: open an issue on github.com/api-evangelist/stockx 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
Fashion & Apparel (apparel, footwear, textiles)	standard	17.2 (thin)	-	-

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 3

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.

Dynamic Client Registration

measured — observed by APIs.io (published)

OpenAPI

measured — observed by APIs.io (published)

OAuth 2.0

measured — observed by APIs.io (declared)

APIs 4

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

StockX Batch API

Batch APIs enable a user to create, update, delete listings in bulk. Batch APIs are asynchronous in nature and we provide mechanisms to poll the API so that you can keep track o...

StockX Catalog API

The StockX Catalog API provides a means for partners to search for catalog data, and request products to be added. Partners can search our Catalog to get StockX product and vari...

StockX Listings API

Listings APIs enable a seller to programmatically sell on StockX. The APIs enable a user to create, update and delete listings on the marketplace, as well as view and fetch live...

StockX Order API

Order APIs enable a user to view all their active orders / sales as well as details for a single order.

Open Collections 4

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

StockX Public Batch API

OPEN COLLECTION

StockX Public Batch Catalog API

OPEN COLLECTION

StockX Public Batch Listings API

OPEN COLLECTION

StockX Public Batch Order API

OPEN COLLECTION

Agent Skills 4

Packaged agent skills for driving this provider's APIs from an AI assistant.

Bulk-list inventory on StockX with batch operations

AGENT SKILL

Create and manage a StockX seller listing

AGENT SKILL

Search the StockX catalog and read market data

AGENT SKILL

Track StockX sales orders and shipping documents

AGENT SKILL

StockX API pricing

Rate limits

daily-quota: 24h
burst: 1s

Rate-limit details →

Rate Limits 1

Documented rate limits and quota policies.

Stockx Rate Limits

2 limits

RATE LIMITS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

StockX API Rules

62 rules · 54 errors 6 warnings 2 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Stockx Public Overlay

1 action · update · stockx-public-openapi-original.json

DERIVED

Security Posture 2

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

Stockx Authentication

apiKey/http/oauth2 · 3 schemes

SECURITY

Stockx Domain Security

TLSv1.3 · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Stockx Scopes

2 scopes · authorizationCode

2 scopes

SCOPES

Agentic Access 1

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

Stockx Agentic Access

32 operations · 9 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

AgenticAccess

AgentSkill

LLMsTxt

WellKnown

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

DataModel

Build 2

SDKs, sample code, and the tooling you integrate with

Packages

Packages

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

Authentication

Authentication

OAuthScopes

OAuthScopes

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

RateLimits

RateLimits

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 2

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Overlay

Overlay

Source (apis.yml)

aid: stockx
name: StockX
description: StockX is a global online marketplace for sneakers, streetwear, electronics, collectibles, and trading cards,
  operating on a live bid/ask model similar to a stock exchange. The StockX Public API (v2.0.0) lets approved developers in
  the StockX Developer Program search the product catalog, read live market data (bids/asks), create and manage seller listings
  individually or in bulk via asynchronous batch operations, and track sales orders and their shipping documents. Requests
  authenticate with an x-api-key header plus an OAuth 2.0 bearer token issued by StockX's Auth0 tenant. StockX was surfaced
  as a portfolio company of Battery Ventures and GV.
url: https://raw.githubusercontent.com/api-evangelist/stockx/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- battery-ventures
- gv
x-tier: profiled
x-tier-reason: has-public-api
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: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - scopes
  - rate-limits
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
image: https://developer.stockx.com/icon.png
tags:
- Company
- Marketplace
- E-Commerce
- Sneakers
- Streetwear
- Resale
- Collectibles
- Catalog
- Selling
- Order
- Fashion
tags_raw:
- Company
- Marketplace
- E-Commerce
- Sneakers
- Streetwear
- Resale
- Collectibles
- Catalog
- Selling
- Orders
- Fashion
apis:
- aid: stockx:stockx-batch-api
  name: StockX Batch API
  description: Batch APIs enable a user to create, update, delete listings in bulk. Batch APIs are asynchronous in nature
    and we provide mechanisms to poll the API so that you can keep track of the batch completion.  Once a batch is successfully
    completed, you can view the status of each individual listing.  We track each individual listing inside a batch separately
    so you can have scenarios where some listings succeed and some fail in a single batch.
  humanURL: https://developer.stockx.com/
  baseURL: https://api.stockx.com/v2
  tags:
  - Batch
  properties:
  - type: OpenAPI
    url: openapi/stockx-batch-api-openapi.yml
  - type: APIReference
    url: https://developer.stockx.com/portal/api-reference
- aid: stockx:stockx-catalog-api
  name: StockX Catalog API
  description: The StockX Catalog API provides a means for partners to search for catalog data, and request products to be
    added. Partners can search our Catalog to get StockX product and variant IDs for various purposes. Access to the Catalog
    Ingestion API is approved on a request-by-request basis.
  humanURL: https://developer.stockx.com/
  baseURL: https://api.stockx.com/v2
  tags:
  - Catalog
  properties:
  - type: OpenAPI
    url: openapi/stockx-catalog-api-openapi.yml
  - type: APIReference
    url: https://developer.stockx.com/portal/api-reference
- aid: stockx:stockx-listings-api
  name: StockX Listings API
  description: Listings APIs enable a seller to programmatically sell on StockX. The APIs enable a user to  create, update
    and delete listings on the marketplace, as well as view and fetch live market data for any live or expired listings you
    have
  humanURL: https://developer.stockx.com/
  baseURL: https://api.stockx.com/v2
  tags:
  - Listings
  properties:
  - type: OpenAPI
    url: openapi/stockx-listings-api-openapi.yml
  - type: APIReference
    url: https://developer.stockx.com/portal/api-reference
- aid: stockx:stockx-order-api
  name: StockX Order API
  description: Order APIs enable a user to view all their active orders / sales as well as details for a single order.
  humanURL: https://developer.stockx.com/
  baseURL: https://api.stockx.com/v2
  tags:
  - Order
  properties:
  - type: OpenAPI
    url: openapi/stockx-order-api-openapi.yml
  - type: APIReference
    url: https://developer.stockx.com/portal/api-reference
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 18
  pass: local-v1
common:
- type: CapabilityMap
  url: capabilities/stockx-capability-edges.yml
  name: StockX Business Capability Map
- type: Overlay
  url: overlays/stockx-public-overlay.yaml
- type: DeveloperPortal
  url: https://developer.stockx.com/
- type: Documentation
  url: https://developer.stockx.com/portal/api-introduction
- type: APIReference
  url: https://developer.stockx.com/portal/api-reference
- type: GettingStarted
  url: https://developer.stockx.com/portal/api-introduction
- type: Authentication
  url: authentication/stockx-authentication.yml
- type: OAuthScopes
  url: scopes/stockx-scopes.yml
- type: Conventions
  url: conventions/stockx-conventions.yml
- type: ErrorCatalog
  url: errors/stockx-problem-types.yml
- type: Lifecycle
  url: lifecycle/stockx-lifecycle.yml
- type: ChangeLog
  url: changelog/stockx-changelog.yml
- type: Conformance
  url: conformance/stockx-conformance.yml
- type: DataModel
  url: data-model/stockx-data-model.yml
- type: X-MCPServerCandidate
  url: mcp/stockx-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: AgenticAccess
  url: agentic-access/stockx-agentic-access.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/stockx-llms.txt
- type: Packages
  url: packages/stockx-packages.yml
- type: WellKnown
  url: well-known/stockx-well-known.yml
- type: DomainSecurity
  url: security/stockx-domain-security.yml
- type: RateLimits
  url: rate-limits/stockx-rate-limits.yml
- type: GitHubOrganization
  url: https://github.com/stockx
- type: Blog
  url: https://stockx.com/news
- type: Support
  url: https://stockx.com/help
- type: SignUp
  url: https://developer.stockx.com/
- type: TermsOfService
  url: https://stockx.com/en-us/terms
- type: PrivacyPolicy
  url: https://stockx.com/about/privacy-policy
- type: Website
  url: https://stockx.com

StockX API — frequently asked questions

Does StockX have an API?

Yes. APIs.io lists 4 APIs from StockX, including StockX Batch API, StockX Catalog API and StockX Listings API, and 1 more.

Is there an OpenAPI specification for the StockX API?

Yes. APIs.io indexes 4 OpenAPI specifications for StockX, each linked for download from this page.

How do I authenticate with the StockX API?

StockX documents its authentication (apiKey/http/oauth2 · 3 schemes). The details are profiled on APIs.io as Stockx Authentication.

Is the StockX API ready for AI agents?

StockX has a Kin Score of 51.9 out of 100 (developing) and an Agent Readiness score of 41.3 (agent-ready), scored by API Evangelist on 2026-11-06.

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