Agent skill

Claude API Helper

by grandamenium in grandamenium/cortextos

Build applications with the Claude API and Anthropic SDKs. An agent skill from grandamenium/cortextos.

MITAuto-check passedAI & LLM Engineering

Install Claude API Helper

skills CLI

$ npx skills add grandamenium/cortextos --skill claude-api-helper -a claude-code

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

GitHub CLI

$ gh skill install grandamenium/cortextos claude-api-helper --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/grandamenium/cortextos.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/claude-api-helper .claude/skills/claude-api-helper && 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/

Paste into Claude Code

Install the "claude-api-helper" agent skill from https://github.com/grandamenium/cortextos/tree/main/skills/claude-api-helper into .claude/skills/claude-api-helper/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "claude-api-helper", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/grandamenium/cortextos/tree/main/skills/claude-api-helper

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add grandamenium/cortextos --skill claude-api-helper -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install grandamenium/cortextos claude-api-helper --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/grandamenium/cortextos.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/claude-api-helper .agents/skills/claude-api-helper && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "claude-api-helper" agent skill from https://github.com/grandamenium/cortextos/tree/main/skills/claude-api-helper into .agents/skills/claude-api-helper/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "claude-api-helper", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add grandamenium/cortextos --skill claude-api-helper -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install grandamenium/cortextos claude-api-helper --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/grandamenium/cortextos.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/claude-api-helper .cursor/skills/claude-api-helper && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "claude-api-helper" agent skill from https://github.com/grandamenium/cortextos/tree/main/skills/claude-api-helper into .cursor/skills/claude-api-helper/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "claude-api-helper", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/grandamenium/cortextos.git --path skills/claude-api-helper

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add grandamenium/cortextos --skill claude-api-helper -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install grandamenium/cortextos claude-api-helper --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/grandamenium/cortextos.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/claude-api-helper .gemini/skills/claude-api-helper && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "claude-api-helper" agent skill from https://github.com/grandamenium/cortextos/tree/main/skills/claude-api-helper into .gemini/skills/claude-api-helper/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "claude-api-helper", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install grandamenium/cortextos claude-api-helper

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add grandamenium/cortextos --skill claude-api-helper -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/grandamenium/cortextos.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/claude-api-helper .github/skills/claude-api-helper && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "claude-api-helper" agent skill from https://github.com/grandamenium/cortextos/tree/main/skills/claude-api-helper into .github/skills/claude-api-helper/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "claude-api-helper", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add grandamenium/cortextos --skill claude-api-helper -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install grandamenium/cortextos claude-api-helper --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/grandamenium/cortextos.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/claude-api-helper .opencode/skills/claude-api-helper && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "claude-api-helper" agent skill from https://github.com/grandamenium/cortextos/tree/main/skills/claude-api-helper into .opencode/skills/claude-api-helper/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "claude-api-helper", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: claude-api-helper
GitHub stars: 101
Token cost: ~467 tokens
SKILL.md length: 56 words
Files: 1
Skills in repo: 55
Repo updated: Sep 23, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Build applications with the Claude API and Anthropic SDKs. An agent skill from grandamenium/cortextos.

Tasks that involve LLM API integration
SKILL.md covers Quick Start, Key Patterns and Best Practices
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Claude API Helper is an agent skill from grandamenium/cortextos. Build applications with the Claude API and Anthropic SDKs. Covers Messages API, streaming, tool use, vision, and best practices.

Its SKILL.md is about 470 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in AI & LLM Engineering, covering LLM API integration. It works with Anthropic API. The licence is MIT.

When your agent uses it

Tasks that involve LLM API integration

Example prompts

“/claude-api-helper”

Requirements

Python 3

What it can do on your machine

Read from SKILL.md and the folder at commit 6f93838. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are python).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Claude API Helper loads about 467 tokens when it runs. Until then it costs about 37 tokens; SKILL.md has 56 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~37
When it runs · the whole SKILL.md, loaded when a task matches: ~467

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 passed

The automated check found no risky patterns in SKILL.md.

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 grandamenium/cortextos at commit 6f93838, republished under its MIT licence (© grandamenium). 56 words, ~467 tokens.

Download SKILL.mdSave it as .claude/skills/claude-api-helper/SKILL.md (or your agent's skills folder).

name: claude-api-helper
description: Build applications with the Claude API and Anthropic SDKs. Covers Messages API, streaming, tool use, vision, and best practices.
homepage: https://docs.anthropic.com/en/api
tags: api, anthropic, sdk, development

Claude API Helper

Reference skill for building with the Claude API (Messages API, Python/TypeScript SDKs).

Quick Start

python

import anthropic

client = anthropic.Anthropic()
message = client.messages.create(
    model="claude-sonnet-4-20250514",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Hello, Claude"}]
)
print(message.content[0].text)

Key Patterns

Streaming

python

with client.messages.stream(
    model="claude-sonnet-4-20250514",
    max_tokens=1024,
    messages=[{"role": "user", "content": "Write a story"}]
) as stream:
    for text in stream.text_stream:
        print(text, end="", flush=True)

Tool Use

python

tools = [{
    "name": "get_weather",
    "description": "Get current weather for a location",
    "input_schema": {
        "type": "object",
        "properties": {
            "location": {"type": "string", "description": "City name"}
        },
        "required": ["location"]
    }
}]

Vision

python

message = client.messages.create(
    model="claude-sonnet-4-20250514",
    max_tokens=1024,
    messages=[{
        "role": "user",
        "content": [
            {"type": "image", "source": {"type": "base64", "media_type": "image/png", "data": base64_data}},
            {"type": "text", "text": "What's in this image?"}
        ]
    }]
)

Best Practices

Use system prompts for consistent behavior
Set appropriate max_tokens (don't over-allocate)
Handle rate limits with exponential backoff
Use streaming for long responses
Cache system prompts with prompt caching for cost savings

Files

Just SKILL.md in skills/claude-api-helper of grandamenium/cortextos.

Open the folder on GitHubat commit 6f93838

Compare with similar skills

Claude API Helper 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.

Claude API Helper compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Claude API Helper this skillgrandamenium/cortextos	101	—	~467	Automated safety check: Pass	MIT	18 days ago
Claude APIterrense/LilBot-agent	121	—	~155	Automated safety check: Pass	None	3 mo ago
Claude API In Prototypesasgeirtj/system_prompts_leaks	69k	—	~281	Automated safety check: Pass	CC0-1.0	yesterday
Claude APIkid-sid/claude-spellbook	190	—	~2.7k	Automated safety check: Pass	MIT	2 mo ago
Clade Hello Worldjeremylongshore/tons-of-skills-marketplace	2.8k	—	~873	Automated safety check: Pass	MIT	yesterday
Clade Install Authjeremylongshore/tons-of-skills-marketplace	2.8k	—	~951	Automated safety check: Notes	MIT	yesterday

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Works with

Anthropic API

Questions about Claude API Helper

What does Claude API Helper do?

Build applications with the Claude API and Anthropic SDKs. An agent skill from grandamenium/cortextos. Claude API Helper is an agent skill from grandamenium/cortextos. Build applications with the Claude API and Anthropic SDKs.

When should I use Claude API Helper?

Claude API Helper fits situations like: tasks that involve LLM API integration.

How do I install Claude API Helper in Claude Code?

Run `npx skills add grandamenium/cortextos --skill claude-api-helper -a claude-code`. Or copy the skill folder (skills/claude-api-helper in grandamenium/cortextos) into .claude/skills/claude-api-helper in your project. Claude Code loads it when a task matches its description.

How do I install Claude API Helper in Codex?

Run `npx skills add grandamenium/cortextos --skill claude-api-helper -a codex`. Or copy the skill folder (skills/claude-api-helper in grandamenium/cortextos) into .agents/skills/claude-api-helper in your project. Codex loads it when a task matches its description.

Can I use Claude API Helper 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 grandamenium/cortextos --skill claude-api-helper -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/claude-api-helper, .gemini/skills/claude-api-helper, .github/skills/claude-api-helper and .opencode/skills/claude-api-helper in your project.

What does Claude API Helper need to run?

SKILL.md names no scripts, command-line tools or credentials: Claude API Helper is instructions for the agent only. Our summary lists: Python 3.

Does Claude API Helper access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Claude API Helper safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Claude API Helper use?

Claude API Helper is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Claude API Helper use?

About 467 tokens (SKILL.md is roughly 1.9k 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 Claude API Helper?

Skills that share tags, products or a category with Claude API Helper: Claude API (terrense/LilBot-agent, 121 stars), Claude API In Prototypes (asgeirtj/system_prompts_leaks, 69k stars), Claude API (kid-sid/claude-spellbook, 190 stars) and Clade Hello World (jeremylongshore/tons-of-skills-marketplace, 2.8k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Claude API Helper?

grandamenium (a GitHub user) maintains it in grandamenium/cortextos, which has 101 GitHub stars. The repository holds 55 skills in this directory. The repository was last updated on September 23, 2026.

Source: grandamenium/cortextos on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Claude API Helper

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Claude API Helper

Quick Start

Key Patterns

Streaming

Tool Use

Vision

Best Practices

Files

Compare with similar skills

Similar skills

More from grandamenium/cortextos

Related

Questions about Claude API Helper