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Agent skill

Anth Install Auth

by jeremylongshore in jeremylongshore/tons-of-skills-marketplace

Install and configure Anthropic Claude SDK authentication for Python and TypeScript.

MITAuto-check: notesAI & LLM Engineering

Install Anth Install Auth

skills CLI
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill anth-install-auth -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install jeremylongshore/tons-of-skills-marketplace anth-install-auth --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/.curated/anth-install-auth .claude/skills/anth-install-auth && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
anth-install-auth
GitHub stars
2.8k
Token cost
~1.2k tokens
SKILL.md length
295 words
Files
1
Skills in repo
3,342
Repo updated
First seen
Licence
MIT

At a glance

Install and configure Anthropic Claude SDK authentication for Python and TypeScript.

  • Works in 4 steps: Install SDK → Configure API Key → Verify Connection (Python) → …
  • Setting up a new Claude API integration
  • SKILL.md covers Overview, Prerequisites, Instructions and Output, plus 6 more sections
  • Calls pip, npm and pnpm; reaches api.anthropic.com; needs ANTHROPIC_API_KEY

What it does

Anth Install Auth is an agent skill from jeremylongshore/tons-of-skills-marketplace. Install and configure Anthropic Claude SDK authentication for Python and TypeScript. Use when setting up a new Claude API integration, configuring API keys, or initializing the Anthropic SDK in your project. Trigger with phrases like "install anthropic", "setup claude api", "anthropic auth", "configure anthropic API key", "claude sdk setup".

Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts. Compatibility notes: Designed for Claude Code

It sits in AI & LLM Engineering, covering LLM API integration. It works with Anthropic API, Python and TypeScript. The repository describes itself as: Model-agnostic agent-skills platform with a harness-free canonical layer, verified adapters, and the ccpi package manager. Explore at tonsofskills.com. The licence is MIT.

When your agent uses it

  • Setting up a new Claude API integration
  • Configuring API keys
  • Initializing the Anthropic SDK in your project
  • With phrases like install anthropic

Example prompts

  • “install anthropic”
  • “setup claude api”
  • “anthropic auth”
  • “/anth-install-auth”

Requirements

  • Python 3
  • Node.js
  • A credential in ANTHROPIC_API_KEY
  • Compatibility (from SKILL.md): Designed for Claude Code
  • Pre-approved tools (allowed-tools): Read, Write, Edit, Bash(npm:*), Bash(pip:*), Grep

Workflow steps

4 steps, taken from the step headings in SKILL.md.

  1. Install SDK
  2. Configure API Key
  3. Verify Connection (Python)
  4. Verify Connection (TypeScript)

What it can do on your machine

Read from SKILL.md and the folder at commit cfae287. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Write
    • Edit
    • Bash(npm:*)
    • Bash(pip:*)
    • Grep

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • pip
    • npm
    • pnpm

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Hosts in commands or code, which the agent is likely to contact:

    • api.anthropic.com

    Also links to:

    • console.anthropic.com
    • github.com
    • platform.claude.com

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names these keys or tokens, usually read from environment variables:

    • ANTHROPIC_API_KEY

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

  • Compatibility

    Designed for Claude Code

    From compatibility in the SKILL.md frontmatter.

Context cost

Anth Install Auth loads about 1.2k tokens when it runs. Until then it costs about 90 tokens; SKILL.md has 295 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~90
When it runs · the whole SKILL.md, loaded when a task matches
~1.2k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

  • NoteMentions a .env fileSKILL.md:59
    # Or add to .env file
  • NoteMentions a .env fileSKILL.md:60
    C_API_KEY=sk-ant-api03-your-key-here' >> .env
  • NoteMentions a .env fileSKILL.md:148
    - Use `.env` files with `.gitignore` exclusion

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from jeremylongshore/tons-of-skills-marketplace at commit cfae287, republished under its MIT licence (© jeremylongshore). 295 words, ~1,205 tokens.

Download SKILL.mdSave it as .claude/skills/anth-install-auth/SKILL.md (or your agent's skills folder).
name
anth-install-auth
description
Install and configure Anthropic Claude SDK authentication for Python and TypeScript. Use when setting up a new Claude API integration, configuring API keys, or initializing the Anthropic SDK in your project. Trigger with phrases like "install anthropic", "setup claude api", "anthropic auth", "configure anthropic API key", "claude sdk setup".
allowed-tools
Read, Write, Edit, Bash(npm:*), Bash(pip:*), Grep
compatibility
Designed for Claude Code
version
1.7.0
license
MIT
author
Jeremy Longshore <jeremy@intentsolutions.io>
tags
saas, ai, anthropic

Anthropic Install & Auth

Overview

Set up the official Anthropic SDK for Python or TypeScript and configure API key authentication. The SDK wraps the Claude Messages API at https://api.anthropic.com/v1/messages.

Prerequisites

  • Node.js 18+ or Python 3.8+
  • Package manager (npm, pnpm, yarn, or pip)
  • Anthropic account with API access at console.anthropic.com
  • API key from Console > API Keys

Instructions

Step 1: Install SDK
bash
# Python
pip install anthropic

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

# With pnpm
pnpm add @anthropic-ai/sdk
Step 2: Configure API Key
bash
# Set environment variable (recommended)
export ANTHROPIC_API_KEY="sk-ant-api03-..."

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

# Verify it's set
echo $ANTHROPIC_API_KEY | head -c 15
# Expected: sk-ant-api03-...
Step 3: Verify Connection (Python)
python
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 hello in exactly 5 words."}]
)
print(message.content[0].text)
print(f"Model: {message.model}, Tokens: {message.usage.input_tokens}+{message.usage.output_tokens}")
Step 4: Verify Connection (TypeScript)
typescript
import Anthropic from '@anthropic-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 hello in exactly 5 words.' }],
});

if (message.content[0].type === 'text') {
  console.log(message.content[0].text);
}
console.log(`Stop reason: ${message.stop_reason}`);

Output

  • Installed SDK package (anthropic for Python, @anthropic-ai/sdk for TS)
  • Environment variable ANTHROPIC_API_KEY configured
  • Successful API response confirming authentication works

Examples

For local Python development, install anthropic in the project virtual environment, export ANTHROPIC_API_KEY only in the current shell, then run the Step 3 script. Its successful text response confirms both package resolution and authentication without adding a secret to the repository. For a Node service, set the same variable in the deployment platform's secret manager and run the TypeScript check once in a non-production environment; keep the key out of source, logs, and client-side bundles.

Error Handling

ErrorHTTP CodeCauseSolution
authentication_error401Invalid or missing API keyVerify key starts with sk-ant-api03-
permission_error403Key lacks required scopeGenerate new key in Console
not_found_error404Invalid API endpointEnsure SDK is latest version
ModuleNotFoundErrorN/ASDK not installedRun pip install anthropic or npm install @anthropic-ai/sdk
connection_errorN/ANetwork/firewall blockingEnsure HTTPS to api.anthropic.com is allowed

Enterprise Configuration

python
# Custom base URL (for proxied environments)
client = anthropic.Anthropic(
    api_key="sk-ant-...",
    base_url="https://your-proxy.internal.com/v1",
    timeout=60.0,
    max_retries=3
)

# With explicit headers
client = anthropic.Anthropic(
    default_headers={"anthropic-beta": "messages-2024-12-19"}
)

Security Considerations

  • Never commit API keys to source control
  • Use .env files with .gitignore exclusion
  • Rotate keys periodically via Console > API Keys
  • Use separate keys per environment (dev/staging/prod)
  • Consider Anthropic's Workspace feature for team key isolation

Resources

Next Steps

After successful auth, proceed to anth-hello-world for your first Messages API call.

© jeremylongshore, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/.curated/anth-install-auth of jeremylongshore/tons-of-skills-marketplace.

Open the folder on GitHubat commit cfae287

Compare with similar skills

Anth Install Auth next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

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Gemini API Devgoogle-gemini/gemini-skills4.3k—~5.1kAutomated safety check: PassApache-2.0
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Works with

Categories

Questions about Anth Install Auth

What does Anth Install Auth do?

Install and configure Anthropic Claude SDK authentication for Python and TypeScript. Anth Install Auth is an agent skill from jeremylongshore/tons-of-skills-marketplace. Install and configure Anthropic Claude SDK authentication for Python and TypeScript.

When should I use Anth Install Auth?

Anth Install Auth fits situations like: setting up a new Claude API integration; configuring API keys; initializing the Anthropic SDK in your project; with phrases like install anthropic.

How do I install Anth Install Auth in Claude Code?

Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill anth-install-auth -a claude-code`. Or copy the skill folder (skills/.curated/anth-install-auth in jeremylongshore/tons-of-skills-marketplace) into .claude/skills/anth-install-auth in your project. Claude Code loads it when a task matches its description.

How do I install Anth Install Auth in Codex?

Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill anth-install-auth -a codex`. Or copy the skill folder (skills/.curated/anth-install-auth in jeremylongshore/tons-of-skills-marketplace) into .agents/skills/anth-install-auth in your project. Codex loads it when a task matches its description.

Can I use Anth Install Auth in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill anth-install-auth -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/anth-install-auth, .gemini/skills/anth-install-auth, .github/skills/anth-install-auth and .opencode/skills/anth-install-auth in your project.

What does Anth Install Auth need to run?

Going by SKILL.md and its folder, Anth Install Auth needs the command-line tools its instructions call (pip, npm and pnpm) and credentials named ANTHROPIC_API_KEY. Our summary lists: Python 3; Node.js; A credential in ANTHROPIC_API_KEY. Its frontmatter pre-approves these tools: Read, Write, Edit, Bash(npm:*), Bash(pip:*), Grep. Compatibility (from SKILL.md): Designed for Claude Code.

Does Anth Install Auth access the network?

SKILL.md names 4 domains. In commands or code: api.anthropic.com; the agent is likely to contact it when it follows the instructions. As links in the text: console.anthropic.com, github.com and platform.claude.com. This is read from the text; nothing was executed.

Is Anth Install Auth safe to install?

Our automated static check of SKILL.md found notes only (mentions a .env file), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Anth Install Auth use?

Anth Install Auth is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Anth Install Auth use?

About 1.2k tokens (SKILL.md is roughly 4.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Anth Install Auth?

Skills that share tags, products or a category with Anth Install Auth: Claude API (loulanyue/awesome-claude-notes, 272 stars), Claude API (loulanyue/awesome-claude-notes, 272 stars), Claude Cookbooks Reference (2025Emma/vibe-coding-cn, 23k stars) and Gemini API Dev (google-gemini/gemini-skills, 4.3k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Anth Install Auth?

jeremylongshore (a GitHub user) maintains it in jeremylongshore/tons-of-skills-marketplace, which has 2,827 GitHub stars. The repository holds 3,342 skills in this directory. The repository was last updated on October 10, 2026.

Source: jeremylongshore/tons-of-skills-marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.