Express

Express is a fast, unopinionated, minimalist web framework for Node.js, providing a robust set of features for building web and mobile applications and APIs. Maintained under the OpenJS Foundation, Express is one of the most widely used HTTP server frameworks in the JavaScript ecosystem.

Express publishes 1 API on the APIs.io network. Tagged areas include Express.js, Framework, HTTP, Middleware, and Node.js.

Express’ developer surface includes documentation, engineering blog, and 7 more developer resources.

🌐 Visit website 📡 Source on GitHub

16.0/100 emerging ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemium

1 APIs

Express.jsFramework HTTP Middleware Node.js Open-Source Web Framework Fortune 1000

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 16.0/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 4.8 / 20

Access Clarity 3.2 / 20

Operational Transparency 1.4 / 13

Contract Governance 0.0 / 12

Discoverability 6.7 / 10

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 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 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

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.

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APIs 1

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

Express

Express is a minimal and flexible Node.js web application framework that provides a robust set of features for web and mobile applications, including routing, middleware support...

Pricing Plans 1

Published pricing tiers and plan structures.

Express Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Express Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Express Finops

FINOPS

Security Posture 2

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

Express Domain Security

TLSv1.3 · DNSSEC

SECURITY

Express Vulnerability Disclosure

security.txt · contact published

SECURITY

Press 5

Recent news and press coverage referencing this provider.

Press Releases

2026-05-25

How Amex exploits new AI tools

2026-05-25

American Express

2026-05-25

Adobe Introduces New AI Assistant in Adobe Express that ...

2026-05-25

American Express Global Business Travel Unveils New ...

2026-05-25

Resources

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 2

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Commercial 1

Pricing, plans, and the legal terms of use

License

License

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Foundation

Foundation

Source (apis.yml)

aid: express
name: Express
description: Express is a fast, unopinionated, minimalist web framework for Node.js, providing a robust set of features for
  building web and mobile applications and APIs. Maintained under the OpenJS Foundation, Express is one of the most widely
  used HTTP server frameworks in the JavaScript ecosystem.
type: Index
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/express.png
tags:
- Express.js
- Framework
- HTTP
- Middleware
- Node.js
- Open-Source
- Web Framework
- Fortune 1000
tags_raw:
- Express.js
- Framework
- HTTP
- Middleware
- Node.js
- Open Source
- Web Framework
- Fortune 1000
url: https://expressjs.com
created: '2025-01-01'
modified: '2026-04-28'
specificationVersion: '0.23'
apis:
- aid: express:express
  name: Express
  description: Express is a minimal and flexible Node.js web application framework that provides a robust set of features
    for web and mobile applications, including routing, middleware support, and HTTP utility methods.
  humanURL: https://expressjs.com
  tags:
  - Express.js
  - Framework
  - Node.js
  - Web Framework
  properties:
  - type: Documentation
    url: https://expressjs.com/en/4x/api.html
  - type: GettingStarted
    url: https://expressjs.com/en/starter/installing.html
  - type: GitHub
    url: https://github.com/expressjs/express
  - type: NPM
    url: https://www.npmjs.com/package/express
common:
- type: VulnerabilityDisclosure
  url: security/express-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/express-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/express-llc
- type: Website
  url: https://expressjs.com
- type: Documentation
  url: https://expressjs.com/en/4x/api.html
- type: GitHubOrganization
  url: https://github.com/expressjs
- type: Foundation
  url: https://openjsf.org
- type: License
  url: https://github.com/expressjs/express/blob/master/LICENSE
- url: https://expressjs.com/feed.xml
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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