REST Client website screenshot

REST Client

REST Client is a Visual Studio Code extension developed by Huachao Mao that enables developers to send HTTP requests and view responses directly within the VS Code editor. It supports RFC 2616 HTTP request format using .http and .rest files, GraphQL queries, cURL commands, multiple authentication schemes (Basic, Digest, SSL Client Certificates, Azure AD, AWS Signature v4, AWS Cognito), environment and file variables, request chaining, cookie management, code generation to multiple languages, and response saving. The extension is installed via the VS Code Marketplace under the identifier humao.rest-client and is widely used as a lightweight alternative to dedicated API clients like Postman and Insomnia.

REST Client publishes 1 API on the APIs.io network. Tagged areas include Clients, HTTP Client, IDE Extension, VS Code, and API Testing.

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

REST Client’s developer surface includes documentation and 5 more developer resources.

🌐 Visit website 📡 Source on GitHub
35.5/100 thin ▼ -5.4 Agent 3/100 human only Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreemium
1 APIs
ClientsHTTP ClientIDE ExtensionVS CodeAPI Testing

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 35.5/100 · thin
Contract Quality 6.9 / 25
Developer Ergonomics 1.7 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 4.8 / 13
Governance 8.3 / 12
Discoverability 5.9 / 10
Agent readiness — 3/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
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
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/rest-client: 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 1

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

REST Client

REST Client is a Visual Studio Code extension for sending HTTP requests and viewing responses directly within the editor. It supports .http and .rest file formats, GraphQL, cURL...

GraphQL 1

GraphQL schemas published by this provider.

REST Client GraphQL API

REST Client is a Visual Studio Code extension for sending HTTP requests and viewing responses directly within the editor. It supports .http and .rest file formats, GraphQL, cURL...

GRAPHQL

Pricing Plans 1

Published pricing tiers and plan structures.

Rest Client Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Rest Client Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Rest Client Finops

FINOPS

Semantic Vocabularies 1

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

Rest Client Context

8 classes · 13 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

REST Client API Rules

5 rules · 3 warnings 2 info

SPECTRAL

JSON Schema 1

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

REST Client HTTP Request

9 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Rest Client Request Structure

0 properties

JSON STRUCTURE

Examples 2

Example request and response payloads for these APIs.

Rest Client Get Request Example

5 fields

EXAMPLE

Rest Client Request Chaining Example

4 fields

EXAMPLE

Security Posture 1

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

Rest Client Domain Security

TLSv1.3

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Vocabulary
Vocabulary
 JSONLDContext
JSONLDContext

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Company 1

The organization behind the API

Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: rest-client
name: REST Client
description: REST Client is a Visual Studio Code extension developed by Huachao Mao that enables developers to send HTTP requests
  and view responses directly within the VS Code editor. It supports RFC 2616 HTTP request format using .http and .rest files,
  GraphQL queries, cURL commands, multiple authentication schemes (Basic, Digest, SSL Client Certificates, Azure AD, AWS Signature
  v4, AWS Cognito), environment and file variables, request chaining, cookie management, code generation to multiple languages,
  and response saving. The extension is installed via the VS Code Marketplace under the identifier humao.rest-client and is
  widely used as a lightweight alternative to dedicated API clients like Postman and Insomnia.
type: Index
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/rest-client.png
tags:
- Clients
- HTTP Client
- IDE Extension
- VS Code
- API Testing
url: https://raw.githubusercontent.com/api-evangelist/rest-client/refs/heads/main/apis.yml
created: '2026-03-27'
modified: '2026-05-02'
specificationVersion: '0.19'
apis:
- aid: rest-client:rest-client
  name: REST Client
  description: REST Client is a Visual Studio Code extension for sending HTTP requests and viewing responses directly within
    the editor. It supports .http and .rest file formats, GraphQL, cURL, multiple auth schemes, environment variables, request
    chaining, and code generation.
  humanURL: https://marketplace.visualstudio.com/items?itemName=humao.rest-client
  tags:
  - Clients
  - HTTP Client
  - IDE Extension
  - VS Code
  - API Testing
  - GraphQL
  - cURL
  properties:
  - type: Documentation
    url: https://github.com/Huachao/vscode-restclient#readme
  - type: GettingStarted
    url: https://github.com/Huachao/vscode-restclient#usage
  - type: GitHubRepository
    url: https://github.com/Huachao/vscode-restclient
  - type: VS Code Marketplace
    url: https://marketplace.visualstudio.com/items?itemName=humao.rest-client
  - type: ChangeLog
    url: https://github.com/Huachao/vscode-restclient/blob/master/CHANGELOG.md
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/rest-client/refs/heads/main/json-schema/rest-client-request-schema.json
  - type: JSONStructure
    url: https://raw.githubusercontent.com/api-evangelist/rest-client/refs/heads/main/json-structure/rest-client-request-structure.json
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/rest-client/refs/heads/main/examples/rest-client-get-request-example.json
  - type: Examples
    url: https://raw.githubusercontent.com/api-evangelist/rest-client/refs/heads/main/examples/rest-client-request-chaining-example.json
  - url: graphql/rest-client-graphql.md
    type: GraphQL
common:
- type: DomainSecurity
  url: security/rest-client-domain-security.yml
- type: Website
  url: https://marketplace.visualstudio.com/items?itemName=humao.rest-client
- type: Documentation
  url: https://github.com/Huachao/vscode-restclient#readme
- type: GitHubOrganization
  url: https://github.com/Huachao/vscode-restclient
- type: Vocabulary
  url: https://raw.githubusercontent.com/api-evangelist/rest-client/refs/heads/main/vocabulary/rest-client-vocabulary.yml
- type: JSONLDContext
  url: https://raw.githubusercontent.com/api-evangelist/rest-client/refs/heads/main/json-ld/rest-client-context.jsonld
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com