VS Code Marketplace

VS Code Marketplace is Microsoft's official extension marketplace for Visual Studio Code, offering thousands of extensions for languages, debuggers, themes, and developer tools. It provides a Gallery API for programmatically searching, discovering, and retrieving extension metadata, enabling integration with editors, tooling, and automation workflows.

VS Code Marketplace publishes 3 API contracts indexed on the APIs.io network: Assets API, Extensions API, and Publishers API. Tagged areas include Developer Tools, Extensions, IDE, and Microsoft.

The VS Code Marketplace catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

VS Code Marketplace’s developer surface includes documentation, developer portal, getting-started guide, changelog, engineering blog, GitHub presence, Stack Overflow tag, and 17 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

34.0/100 thin ▬ flat Agent 15/100 agent aware saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemium

1 published contract

Developer Tools Extensions IDE Microsoft

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 34.0/100 · thin

Contract Quality 9.2 / 19

Developer Ergonomics 5.9 / 15

Access Clarity 3.5 / 15

Operational Transparency 2.6 / 10

Contract Governance 1.2 / 9

Discoverability 3.9 / 8

Regulatory Posture 1.9 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 15/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 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 7 / 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

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 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 Ask about this →
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) Ask about this →
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) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link Ask about this →

10 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 23.4 — up to +15.3 composite points Ask about this →
Contract Quality scores 49.1 — up to +12.7 composite points Ask about this →
Developer Ergonomics scores 39.3 — up to +12.1 composite points Ask about this →

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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/vs-code-marketplace/apis.yml: open an issue on github.com/api-evangelist/vs-code-marketplace 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
Developer Tools	gravity	51.8	-	-
IDE Extension Marketplaces (JetBrains, VS Code, Open VSX, Docker Verified Publishers, PyPI orgs)	gravity	51.8	-	-

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.

OpenAPI

measured — observed by APIs.io (published)

APIs 3

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

VS Code Marketplace Assets API

Download extension assets including VSIX packages

VS Code Marketplace Extensions API

Query, search, and retrieve VS Code extensions from the Marketplace

VS Code Marketplace Publishers API

Publisher management and information

Open Collections 4

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

VS Code Marketplace Gallery Assets API

OPEN COLLECTION

VS Code Marketplace Gallery Assets Extensions API

OPEN COLLECTION

VS Code Marketplace Gallery API

OPEN COLLECTION

VS Code Marketplace Gallery Assets Publishers API

OPEN COLLECTION

VS Code Marketplace API pricing

Not yet checked against VS Code Marketplace's own pricing page. Compiled by API Evangelist on 2026-05-04; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free freemium	Free
Professional paid	Free
Enterprise enterprise	—

Plan details, limits and sources →

Rate limits

Free Tier Default: 10 requests per minute
Free Tier Monthly Quota: 1000 requests per month
Professional Tier Default: 100 requests per minute

Compiled by API Evangelist, not yet checked against VS Code Marketplace's documentation. All 5 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

VS Code Marketplace Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

VS Code Marketplace Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

VS Code Marketplace Finops

FINOPS

Semantic Vocabularies 1

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

Vs Code Marketplace Context

0 classes · 8 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

VS Code Marketplace — jsonschema rules

5 rules · 3 warn-severity 2 info-severity

SPECTRAL

VS Code Marketplace API Rules

9 rules · 2 error-severity 4 warn-severity 3 info-severity

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

VS Code Marketplace Extension

14 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

VS Code Marketplace Extension Structure

0 properties

JSON STRUCTURE

Examples 2

Example request and response payloads for these APIs.

VS Code Marketplace Downloadextension Example

5 fields

EXAMPLE

VS Code Marketplace Queryextensions Example

4 fields

EXAMPLE

Security Posture 1

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

VS Code Marketplace Domain Security

TLSv1.3

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

VS Code Marketplace Agentic Access

3 operations

3 operations · 0 acting

AGENTIC

Resources

Get Started 2

Portal, sign-up, and the first successful call

Portal

Portal

GettingStarted

GettingStarted

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

Guide

Guide

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 2

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace

PostmanWorkspace

GitHub

GitHub

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Learn 1

Tutorials, courses, talks, and written guidance

YouTube

YouTube

Operate 5

Status, limits, changes, and where to get help

RateLimits

ChangeLog

IssueTracker

Community

StackOverflow

Commercial 4

Pricing, plans, and the legal terms of use

Plans

FinOps

TermsOfService

PrivacyPolicy

Company 3

The organization behind the API

Website

Website

Blog

Blog

LinkedIn

Other 2

Properties that don't map to a standard resource type

Catalog

Catalog

Source (apis.yml)

aid: vs-code-marketplace
url: https://raw.githubusercontent.com/api-evangelist/vs-code-marketplace/refs/heads/main/apis.yml
apis:
- aid: vs-code-marketplace:vs-code-marketplace-assets-api
  name: VS Code Marketplace Assets API
  description: Download extension assets including VSIX packages
  humanURL: https://github.com/microsoft/vscode/blob/main/src/vs/platform/extensionManagement/common/extensionGalleryService.ts
  baseURL: https://marketplace.visualstudio.com/_apis/public/gallery
  tags:
  - Assets
  properties:
  - type: OpenAPI
    url: openapi/vs-code-marketplace-assets-api-openapi.yml
  - type: Documentation
    url: https://marketplace.visualstudio.com/
  - type: BaseURL
    url: https://marketplace.visualstudio.com/_apis/public/gallery
  - type: SourceCode
    url: https://github.com/microsoft/vscode/blob/main/src/vs/platform/extensionManagement/common/extensionGalleryService.ts
  - type: Guide
    url: https://code.visualstudio.com/api/working-with-extensions/publishing-extension
- aid: vs-code-marketplace:vs-code-marketplace-extensions-api
  name: VS Code Marketplace Extensions API
  description: Query, search, and retrieve VS Code extensions from the Marketplace
  humanURL: https://github.com/microsoft/vscode/blob/main/src/vs/platform/extensionManagement/common/extensionGalleryService.ts
  baseURL: https://marketplace.visualstudio.com/_apis/public/gallery
  tags:
  - Extensions
  properties:
  - type: OpenAPI
    url: openapi/vs-code-marketplace-extensions-api-openapi.yml
  - type: Documentation
    url: https://marketplace.visualstudio.com/
  - type: BaseURL
    url: https://marketplace.visualstudio.com/_apis/public/gallery
  - type: SourceCode
    url: https://github.com/microsoft/vscode/blob/main/src/vs/platform/extensionManagement/common/extensionGalleryService.ts
  - type: Guide
    url: https://code.visualstudio.com/api/working-with-extensions/publishing-extension
- aid: vs-code-marketplace:vs-code-marketplace-publishers-api
  name: VS Code Marketplace Publishers API
  description: Publisher management and information
  humanURL: https://github.com/microsoft/vscode/blob/main/src/vs/platform/extensionManagement/common/extensionGalleryService.ts
  baseURL: https://marketplace.visualstudio.com/_apis/public/gallery
  tags:
  - Publishers
  properties:
  - type: OpenAPI
    url: openapi/vs-code-marketplace-publishers-api-openapi.yml
  - type: Documentation
    url: https://marketplace.visualstudio.com/
  - type: BaseURL
    url: https://marketplace.visualstudio.com/_apis/public/gallery
  - type: SourceCode
    url: https://github.com/microsoft/vscode/blob/main/src/vs/platform/extensionManagement/common/extensionGalleryService.ts
  - type: Guide
    url: https://code.visualstudio.com/api/working-with-extensions/publishing-extension
name: VS Code Marketplace
description: VS Code Marketplace is Microsoft's official extension marketplace for Visual Studio Code, offering thousands
  of extensions for languages, debuggers, themes, and developer tools. It provides a Gallery API for programmatically searching,
  discovering, and retrieving extension metadata, enabling integration with editors, tooling, and automation workflows.
deliveryModel:
  model: saas
  license_evidence:
    not_product:
    - microsoft/vscode
  open_source: unknown
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: low
  source:
  - openapi
  - pricing
  - repository-not-product
  generated: '2026-09-25'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/vs-code-marketplace.png
tags:
- Developer Tools
- Extensions
- IDE
- Microsoft
type: Index
access: 3rd-Party
common:
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/vs-code-marketplace/overview
- type: Plans
  url: plans/vs-code-marketplace-plans-pricing.yml
- type: RateLimits
  url: rate-limits/vs-code-marketplace-rate-limits.yml
- type: FinOps
  url: finops/vs-code-marketplace-finops.yml
- type: AgenticAccess
  url: agentic-access/vs-code-marketplace-agentic-access.yml
- type: DomainSecurity
  url: security/vs-code-marketplace-domain-security.yml
- url: https://marketplace.visualstudio.com/
  name: VS Code Marketplace Website
  type: Website
- url: https://code.visualstudio.com/docs
  name: Documentation
  type: Documentation
- url: https://code.visualstudio.com/api/working-with-extensions/publishing-extension
  name: Publishing Extensions Guide
  type: Guide
- url: https://marketplace.visualstudio.com/manage
  name: Publisher Management
  type: Portal
- url: https://code.visualstudio.com/api
  name: Extension API Documentation
  type: Documentation
- url: https://code.visualstudio.com/api/get-started/your-first-extension
  name: Getting Started
  type: GettingStarted
- url: https://marketplace.visualstudio.com/VSCode
  name: VS Code Extensions
  type: Catalog
- url: https://code.visualstudio.com/updates
  name: Release Notes
  type: ChangeLog
- url: https://code.visualstudio.com/blogs
  name: Blog
  type: Blog
- url: https://github.com/microsoft/vscode
  name: GitHub
  type: GitHub
- url: https://github.com/microsoft/vscode/issues
  name: GitHub Issues
  type: IssueTracker
- url: https://code.visualstudio.com/community
  name: Community
  type: Community
- url: https://stackoverflow.com/questions/tagged/visual-studio-code
  name: Stack Overflow
  type: StackOverflow
- url: https://x.com/code
  name: X (Twitter)
  type: X
- url: https://www.linkedin.com/showcase/microsoft-visual-studio-code
  name: LinkedIn
  type: LinkedIn
- url: https://www.youtube.com/@code
  name: YouTube
  type: YouTube
- url: https://marketplace.visualstudio.com/policies/agree
  name: Terms of Use
  type: TermsOfService
- url: https://privacy.microsoft.com/privacystatement
  name: Privacy Policy
  type: PrivacyPolicy
created: '2024-01-01'
modified: '2026-05-19'
specificationVersion: '0.23'

VS Code Marketplace API — frequently asked questions

Does VS Code Marketplace have an API?

Yes. APIs.io lists 3 APIs from VS Code Marketplace, including VS Code Marketplace Assets API, VS Code Marketplace Extensions API and VS Code Marketplace Publishers API.

Is there an OpenAPI specification for the VS Code Marketplace API?

Yes. APIs.io indexes 3 OpenAPI specifications for VS Code Marketplace, each linked for download from this page.

How much does the VS Code Marketplace API cost?

APIs.io lists 3 pricing plans for VS Code Marketplace, with each plan's price, limits and inclusions under Pricing on this page.

Is the VS Code Marketplace API ready for AI agents?

VS Code Marketplace has a Kin Score of 34.0 out of 100 (thin) and an Agent Readiness score of 15.4 (agent-aware), scored by API Evangelist on 2026-11-13.

Work with this as data

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MCP server

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Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
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.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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