api-tools

Q: How do I install api-tools?

Run npx skills add https://github.com/miles990/claude-software-skills --skill api-tools in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/api-tools/ (personal) or .claude/skills/api-tools/ (project).

by miles990Backend & APIs

API testing, documentation, and development tools

Installs: 74
Last 24h: —
Trending rank: —
Security: Not audited

Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/miles990/claude-software-skills --skill api-tools

01
Install
Run the command in your project. The CLI asks which agents to install for.
02
Describe the task
Ask your agent for something this skill covers. It loads api-tools automatically when relevant.
03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

API Tools

Overview

Tools and techniques for API development, testing, documentation, and debugging.

HTTP Clients

cURL

# Basic GET
curl https://api.example.com/users

# GET with headers
curl -H "Authorization: Bearer TOKEN" \
     -H "Accept: application/json" \
     https://api.example.com/users

# POST with JSON body
curl -X POST \
     -H "Content-Type: application/json" \
     -d '{"name": "John", "email": "john@example.com"}' \
     https://api.example.com/users

# POST with form data
curl -X POST \
     -F "file=@document.pdf" \
     -F "name=My Document" \
     https://api.example.com/upload

# PUT request
curl -X PUT \
     -H "Content-Type: application/json" \
     -d '{"name": "Updated Name"}' \
     https://api.example.com/users/123

# DELETE request
curl -X DELETE https://api.example.com/users/123

# Show response headers
curl -i https://api.example.com/users

# Verbose output (debugging)
curl -v https://api.example.com/users

# Follow redirects
curl -L https://example.com/redirect

# Save response to file
curl -o response.json https://api.example.com/users

# With authentication
curl -u username:password https://api.example.com/protected
curl --oauth2-bearer TOKEN https://api.example.com/protected

# Measure timing
curl -w "@curl-format.txt" -o /dev/null -s https://api.example.com

# curl-format.txt
     time_namelookup:  %{time_namelookup}s\n
        time_connect:  %{time_connect}s\n
     time_appconnect:  %{time_appconnect}s\n
    time_pretransfer:  %{time_pretransfer}s\n
       time_redirect:  %{time_redirect}s\n
  time_starttransfer:  %{time_starttransfer}s\n
                     ----------\n
          time_total:  %{time_total}s\n

HTTPie

# GET request (more readable output)
http https://api.example.com/users

# With headers
http https://api.example.com/users \
  Authorization:"Bearer TOKEN" \
  Accept:application/json

# POST with JSON (default)
http POST https://api.example.com/users \
  name=John \
  email=john@example.com

# POST with raw JSON
http POST https://api.example.com/users \
  < user.json

# Form data
http -f POST https://api.example.com/login \
  username=john \
  password=secret

# File upload
http -f POST https://api.example.com/upload \
  file@document.pdf

# Download file
http --download https://api.example.com/files/document.pdf

# Session persistence
http --session=user-session POST https://api.example.com/login
http --session=user-session GET https://api.example.com/profile

# Only headers
http --headers https://api.example.com/users

# Only body
http --body https://api.example.com/users

API Testing

Postman Collections

{
  "info": {
    "name": "User API",
    "schema": "https://schema.getpostman.com/json/collection/v2.1.0/collection.json"
  },
  "variable": [
    {
      "key": "baseUrl",
      "value": "https://api.example.com"
    },
    {
      "key": "token",
      "value": ""
    }
  ],
  "item": [
    {
      "name": "Auth",
      "item": [
        {
          "name": "Login",
          "request": {
            "method": "POST",
            "url": "{{baseUrl}}/auth/login",
            "header": [
              { "key": "Content-Type", "value": "application/json" }
            ],
            "body": {
              "mode": "raw",
              "raw": "{\"email\": \"{{email}}\", \"password\": \"{{password}}\"}"
            }
          },
          "event": [
            {
              "listen": "test",
              "script": {
                "exec": [
                  "pm.test('Status code is 200', function () {",
                  "    pm.response.to.have.status(200);",
                  "});",
                  "",
                  "pm.test('Response has token', function () {",
                  "    var jsonData = pm.response.json();",
                  "    pm.expect(jsonData.token).to.be.a('string');",
                  "    pm.collectionVariables.set('token', jsonData.token);",
                  "});"
                ]
              }
            }
          ]
        }
      ]
    },
    {
      "name": "Users",
      "item": [
        {
          "name": "List Users",
          "request": {
            "method": "GET",
            "url": {
              "raw": "{{baseUrl}}/users?page=1&limit=10",
              "query": [
                { "key": "page", "value": "1" },
                { "key": "limit", "value": "10" }
              ]
            },
            "header": [
              { "key": "Authorization", "value": "Bearer {{token}}" }
            ]
          },
          "event": [
            {
              "listen": "test",
              "script": {
                "exec": [
                  "pm.test('Status code is 200', function () {",
                  "    pm.response.to.have.status(200);",
                  "});",
                  "",
                  "pm.test('Response is an array', function () {",
                  "    var jsonData = pm.response.json();",
                  "    pm.expect(jsonData.data).to.be.an('array');",
                  "});",
                  "",
                  "pm.test('Response time is less than 500ms', function () {",
                  "    pm.expect(pm.response.responseTime).to.be.below(500);",
                  "});"
                ]
              }
            }
          ]
        }
      ]
    }
  ]
}

Newman CLI

# Run Postman collection
newman run collection.json

# With environment
newman run collection.json -e environment.json

# Generate HTML report
newman run collection.json \
  --reporters cli,html \
  --reporter-html-export report.html

# Run specific folder
newman run collection.json --folder "Users"

# With iteration data
newman run collection.json -d data.json -n 10

# Set environment variables
newman run collection.json \
  --env-var "baseUrl=https://staging.api.example.com" \
  --env-var "token=xxx"

OpenAPI / Swagger

OpenAPI Specification

# openapi.yaml
openapi: 3.0.3
info:
  title: User API
  description: API for managing users
  version: 1.0.0
  contact:
    email: api@example.com
  license:
    name: MIT

servers:
  - url: https://api.example.com/v1
    description: Production
  - url: https://staging-api.example.com/v1
    description: Staging

tags:
  - name: Users
    description: User management operations
  - name: Auth
    description: Authentication operations

paths:
  /users:
    get:
      summary: List users
      description: Returns a paginated list of users
      operationId: listUsers
      tags:
        - Users
      security:
        - bearerAuth: []
      parameters:
        - name: page
          in: query
          description: Page number
          schema:
            type: integer
            minimum: 1
            default: 1
        - name: limit
          in: query
          description: Items per page
          schema:
            type: integer
            minimum: 1
            maximum: 100
            default: 20
        - name: search
          in: query
          description: Search term
          schema:
            type: string
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/UserList'
        '401':
          $ref: '#/components/responses/Unauthorized'

    post:
      summary: Create user
      operationId: createUser
      tags:
        - Users
      security:
        - bearerAuth: []
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateUser'
      responses:
        '201':
          description: User created
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/User'
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'

  /users/{id}:
    get:
      summary: Get user by ID
      operationId: getUserById
      tags:
        - Users
      security:
        - bearerAuth: []
      parameters:
        - name: id
          in: path
          required: true
          schema:
            type: string
            format: uuid
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/User'
        '404':
          $ref: '#/components/responses/NotFound'

components:
  schemas:
    User:
      type: object
      required:
        - id
        - email
        - createdAt
      properties:
        id:
          type: string
          format: uuid
          example: "123e4567-e89b-12d3-a456-426614174000"
        email:
          type: string
          format: email
          example: "user@example.com"
        name:
          type: string
          example: "John Doe"
        role:
          type: string
          enum: [user, admin]
          default: user
        createdAt:
          type: string
          format: date-time

    CreateUser:
      type: object
      required:
        - email
        - password
      properties:
        email:
          type: string
          format: email
        password:
          type: string
          minLength: 8
        name:
          type: string

    UserList:
      type: object
      properties:
        data:
          type: array
          items:
            $ref: '#/components/schemas/User'
        meta:
          $ref: '#/components/schemas/PaginationMeta'

    PaginationMeta:
      type: object
      properties:
        page:
          type: integer
        limit:
          type: integer
        total:
          type: integer
        totalPages:
          type: integer

    Error:
      type: object
      properties:
        code:
          type: string
        message:
          type: string

  responses:
    BadRequest:
      description: Bad request
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'

    Unauthorized:
      description: Unauthorized
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'

    NotFound:
      description: Resource not found
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'

  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT

Generate Client SDK

# Generate TypeScript client
npx openapi-generator-cli generate \
  -i openapi.yaml \
  -g typescript-fetch \
  -o ./generated/client

# Generate Python client
openapi-generator generate \
  -i openapi.yaml \
  -g python \
  -o ./generated/python-client

Mock Servers

Prism (OpenAPI Mock Server)

# Start mock server
npx @stoplight/prism-cli mock openapi.yaml

# With dynamic responses
npx @stoplight/prism-cli mock openapi.yaml --dynamic

# Custom port
npx @stoplight/prism-cli mock openapi.yaml -p 4010

JSON Server (Quick REST API)

// db.json
{
  "users": [
    { "id": 1, "name": "John", "email": "john@example.com" },
    { "id": 2, "name": "Jane", "email": "jane@example.com" }
  ],
  "posts": [
    { "id": 1, "title": "Hello World", "userId": 1 }
  ]
}

# Start server
npx json-server --watch db.json --port 3001

# Routes automatically created:
# GET    /users
# GET    /users/1
# POST   /users
# PUT    /users/1
# DELETE /users/1
# GET    /posts?userId=1

API Debugging

Request/Response Logging

import axios from 'axios';

// Request interceptor
axios.interceptors.request.use((config) => {
  console.log('Request:', {
    method: config.method?.toUpperCase(),
    url: config.url,
    params: config.params,
    data: config.data,
    headers: config.headers,
  });
  return config;
});

// Response interceptor
axios.interceptors.response.use(
  (response) => {
    console.log('Response:', {
      status: response.status,
      headers: response.headers,
      data: response.data,
    });
    return response;
  },
  (error) => {
    console.log('Error:', {
      status: error.response?.status,
      data: error.response?.data,
    });
    return Promise.reject(error);
  }
);

Related Skills

[[api-design]] - API design patterns
[[testing-strategies]] - API testing
[[backend]] - Backend development

FAQ

What does the api-tools skill do?

API testing, documentation, and development tools

How do I install api-tools?

Run npx skills add https://github.com/miles990/claude-software-skills --skill api-tools in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/api-tools/ (personal) or .claude/skills/api-tools/ (project).

Which AI agents can use api-tools?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is api-tools safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains api-tools?

It is published by miles990 in miles990/claude-software-skills. It has 74 recorded installs.

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api-tools

Install

Install

Describe the task

Review the result

SKILL.md

API Tools

Overview

HTTP Clients

cURL

HTTPie

API Testing

Postman Collections

Newman CLI

OpenAPI / Swagger

OpenAPI Specification

Generate Client SDK

Mock Servers

Prism (OpenAPI Mock Server)

JSON Server (Quick REST API)

API Debugging

Request/Response Logging

Related Skills

FAQ

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