About

Imported from jeremylongshore/tons-of-skills-marketplace (skills/.curated/clade-install-auth/SKILL.md). Install upstream with npx skills add jeremylongshore/tons-of-skills-marketplace --skill clade-install-auth. Copyright stays with the author (MIT).

Anthropic Install & Auth

Name: clade-install-auth
Author: jeremylongshore

Overview

Set up the Anthropic SDK and configure your API key to start using Claude models.

Prerequisites

Node.js 18+ or Python 3.10+
Anthropic account at console.anthropic.com
API key from Settings → API Keys (starts with sk-ant-)

Instructions

Step 1: Install SDK

# Node.js / TypeScript
npm install @claude-ai/sdk

# Python
pip install anthropic

Step 2: Configure API Key

# Set environment variable (recommended)
export ANTHROPIC_API_KEY="sk-ant-api03-..."

# Or add to .env file
echo 'ANTHROPIC_API_KEY=sk-ant-api03-...' >> .env

Important: Never hardcode API keys. Use environment variables or a secrets manager. Keys start with sk-ant-.

Step 3: Verify Connection

import Anthropic from '@claude-ai/sdk';

const client = new Anthropic(); // reads ANTHROPIC_API_KEY from env

const message = await client.messages.create({
  model: 'claude-sonnet-4-20250514',
  max_tokens: 64,
  messages: [{ role: 'user', content: 'Say "connected" in one word.' }],
});
console.log(message.content[0].text); // "Connected"

import anthropic

client = anthropic.Anthropic()  # reads ANTHROPIC_API_KEY from env

message = client.messages.create(
    model="claude-sonnet-4-20250514",
    max_tokens=64,
    messages=[{"role": "user", "content": "Say 'connected' in one word."}],
)
print(message.content[0].text)  # "Connected"

Output

@claude-ai/sdk in node_modules or anthropic in site-packages
ANTHROPIC_API_KEY environment variable set
Successful Claude response confirming API access

Error Handling

Error	Cause	Solution
`authentication_error` (401)	API key missing, invalid, or revoked	Check key at console.anthropic.com → API Keys
`permission_error` (403)	Key lacks access to requested model	Verify workspace has model access enabled
`ModuleNotFoundError`	SDK not installed	`pip install anthropic` or `npm i @claude-ai/sdk`
`Could not resolve host`	Network/DNS issue	Check internet connectivity and proxy settings

Examples

TypeScript Setup

import Anthropic from '@claude-ai/sdk';

// Default: reads ANTHROPIC_API_KEY from environment
const client = new Anthropic();

// Explicit key (for testing only — don't hardcode in production)
const client = new Anthropic({ apiKey: 'sk-ant-api03-...' });

// Custom base URL (for proxies or Vertex AI)
const client = new Anthropic({
  baseURL: 'https://your-proxy.example.com',
});

Python Setup

import anthropic

# Default: reads ANTHROPIC_API_KEY from environment
client = anthropic.Anthropic()

# Explicit key
client = anthropic.Anthropic(api_key="sk-ant-api03-...")

# Async client
client = anthropic.AsyncAnthropic()

Resources

Next Steps

After successful auth, proceed to clade-hello-world for your first Claude conversation.

Use it

Copy one of these into your project. Installing also returns the manifest and these snippets.

yaml

targets:
  - https://api.opensmartroute.ai/api/v1/registry/jeremylongshore-tons-of-skills-marketplace-clade-install-auth/manifest   # or paste the manifest below

Manifest

An Open Capability Manifest: the router reads it to know what this does, what it costs and when to pick it.

jeremylongshore-tons-of-skills-marketplace-clade-install-auth.ocm.jsonjson

{
  "ocm": "1",
  "id": "jeremylongshore-tons-of-skills-marketplace-clade-install-auth",
  "kind": "skill",
  "name": "clade-install-auth",
  "description": "Install and configure the Anthropic SDK for Claude API access. Use when setting up Claude integration, configuring API keys, or initializing the Anthropic client in your project. Trigger with phrases like \"install anthropic\", \"setup claude api\", \"anthropic auth\", \"configure anthropic API key\".",
  "publisher": "jeremylongshore",
  "version": "1.0.0",
  "capabilities": {
    "domains": [
      "coding"
    ],
    "tags": [
      "skill-md",
      "saas",
      "anthropic",
      "claude",
      "ai",
      "skills-sh"
    ],
    "languages": [
      "en"
    ]
  },
  "quality_prior": 0.6,
  "examples": [
    "Install and configure the Anthropic SDK for Claude API access. Use when setting up Claude integration, configuring API keys, or initializing the Anthropic client in your project. Trigger with phrases like \"install anthropic\", \"setup claude api\", \"anthropic auth\", \"configure anthropic API key\"."
  ],
  "primary": false,
  "metadata": {
    "source": {
      "provider": "skills.sh",
      "repository": "https://github.com/jeremylongshore/tons-of-skills-marketplace",
      "path": "skills/.curated/clade-install-auth/SKILL.md",
      "ref": "HEAD",
      "url": "https://github.com/jeremylongshore/tons-of-skills-marketplace/blob/HEAD/skills/.curated/clade-install-auth/SKILL.md",
      "key": "jeremylongshore/tons-of-skills-marketplace/skills/.curated/clade-install-auth/SKILL.md"
    },
    "compatibility": "Designed for Claude Code",
    "allowed_tools": [
      "Read,",
      "Write,",
      "Edit,",
      "Bash(npm:*),",
      "Bash(pip:*),",
      "Grep"
    ],
    "license": "MIT"
  },
  "instructions": "# Anthropic Install & Auth\n\n## Overview\n\nSet up the Anthropic SDK and configure your API key to start using Claude models.\n\n## Prerequisites\n\n- Node.js 18+ or Python 3.10+\n- Anthropic account at [console.anthropic.com](https://console.anthropic.com)\n- API key from Settings → API Keys (starts with `sk-ant-`)\n\n## Instructions\n\n### Step 1: Install SDK\n\n```bash\n# Node.js / TypeScript\nnpm install @claude-ai/sdk\n\n# Python\npip install anthropic\n```\n\n### Step 2: Configure API Key\n\n```bash\n# Set environment variable (recommended)\nexport ANTHROPIC_API_KEY=\"sk-ant-api03-...\"\n\n# Or add to .env file\necho '",
  "cost": {
    "context_tokens": 804
  }
}

Fetch it by URL: GET /api/v1/registry/jeremylongshore-tons-of-skills-marketplace-clade-install-auth/manifest?version=1.0.0

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