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npm

npm is the world's largest software registry, hosting over two million JavaScript packages for the Node.js ecosystem. Their developer platform provides APIs for searching and retrieving package metadata, managing access tokens, subscribing to registry event webhooks, and publishing packages with supply chain provenance verification.

agent ready

Solid contracts, transparent operations, and an easy start — typically complete on four or five facets with one clear soft spot.

Kin Score

API Evangelist profiles npm the way a machine reads it — 44 machine-readable artifacts across 10 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.

Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — npm scores 64.4/100 (strong), with a separate agent-readiness read of 54/100 (agent ready). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.

Kin Score

This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 64.4/100 · strong
Contract Quality 19.9 / 25
Developer Ergonomics 7.0 / 20
Commercial Clarity 14.7 / 20
Operational Transparency 6.8 / 13
Governance 7.3 / 12
Discoverability 8.8 / 10
Agent readiness — 54/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 15 / 15
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 6 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3

How we profile npm

Each block below is one kind of artifact we hold for npm. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.

APIs 10

Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.

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

npm Registry API

The npm Registry API provides programmatic access to the npm package registry, the largest software registry in the world hosting over two million JavaScript packages. Developer...

npm Hooks API

The npm Hooks API allows developers to subscribe to notifications about changes in the npm registry. Hooks send HTTP POST payloads to a configured URI whenever a package is chan...

npm CLI

The npm CLI is the official command-line interface for the npm package manager, providing developers with tools to install, publish, and manage JavaScript packages and their dep...

npm Provenance

npm Provenance provides supply chain security for JavaScript packages by establishing a verifiable link between a published package and its source code repository and build envi...

npm Downloads API

Package tarball downloads.

npm OIDC API

OpenID Connect token exchange for trusted publishing. Exchange OIDC identity tokens from supported CI/CD providers for short-lived npm registry access tokens.

npm Packages API

Package metadata retrieval, including full packuments and version-specific documents.

npm Search API

Full-text search across the npm registry with weighted scoring.

npm Tokens API

Manage npm access tokens for authentication. Create, list, and delete tokens with customizable permissions and restrictions.

npm Trusted Publishers API

Configure trusted publisher settings for packages to enable OIDC token exchange from CI/CD providers without long-lived npm tokens.

Scroll within the panel for all 10 ·

Open Collections 3

Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.

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

npm Hooks API

OPEN COLLECTION

npm Public API

OPEN COLLECTION

npm Registry API

OPEN COLLECTION

Pricing Plans 1

Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the six things the Kin Score reads for commercial clarity.

Published pricing tiers and plan structures.

Npm Plans Pricing

4 plans

PLANS

Rate Limits 1

Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.

Documented rate limits and quota policies.

Npm Rate Limits

4 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.

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

Npm Finops

FINOPS

Event Specifications 1

Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.

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

npm Hooks Events

The npm Hooks event system delivers HTTP POST payloads to subscriber endpoints whenever changes occur in the npm registry. Hooks can be configured to watch for changes to indivi...

ASYNCAPI

Semantic Vocabularies 1

JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.

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

Npm Context

0 classes · 8 properties

JSON-LD

Spectral Rules 2

Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.

npm API Rules

6 rules · 1 errors · 4 warnings

SPECTRAL

npm API Rules

6 rules · 4 warnings

SPECTRAL

JSON Schema 19

Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.

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

Distribution

6 properties

JSON SCHEMA

Error

2 properties

JSON SCHEMA

npm Hook Event Payload

8 properties

JSON SCHEMA

Hook

10 properties

JSON SCHEMA

HookCreateRequest

4 properties

JSON SCHEMA

HookUpdateRequest

2 properties

JSON SCHEMA

npm Package Document

17 properties

JSON SCHEMA

PackageDocument

16 properties

JSON SCHEMA

PackageVersion

19 properties

JSON SCHEMA

Person

3 properties

JSON SCHEMA

RegistryMetadata

11 properties

JSON SCHEMA

Repository

2 properties

JSON SCHEMA

SearchResultItem

3 properties

JSON SCHEMA

SearchResults

3 properties

JSON SCHEMA

Token

7 properties

JSON SCHEMA

TokenCreateRequest

4 properties

JSON SCHEMA

TokenWithValue

0 properties

JSON SCHEMA

TrustedPublisher

7 properties

JSON SCHEMA

TrustedPublisherRequest

5 properties

JSON SCHEMA

Scroll within the panel for all 19 ·

JSON Structure 1

JSON Structure captures the data shapes in a form built for tooling — a complement to JSON Schema that keeps the model machine-legible.

JSON Structure definitions describing this provider's data shapes.

Npm Structure

0 properties

JSON STRUCTURE

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.

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

Npm Authentication

http · 2 schemes

SECURITY

Npm Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Npm Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.

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

Npm Agentic Access

17 operations · 8 acting

17 operations · 8 acting

AGENTIC

Resources

Every other property we hold for npm — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.

Get Started 2

Portal, sign-up, and the first successful call

Documentation 1

Reference material describing how the API behaves

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

Build 1

SDKs, sample code, and the tooling you integrate with

Operate 2

Status, limits, changes, and where to get help

Commercial 2

Pricing, plans, and the legal terms of use

Company 3

The organization behind the API

← All providers · Data indexed from github.com/api-evangelist/npm · machine-readable index on apis.io