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Agent skill

Auth

by hashgraph-online in hashgraph-online/awesome-codex-plugins

Set and save the CarsXE API key. An agent skill from hashgraph-online/awesome-codex-plugins.

MITAuto-check passed

Install Auth

skills CLI
$ npx skills add hashgraph-online/awesome-codex-plugins --skill auth -a claude-code

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

GitHub CLI
$ gh skill install hashgraph-online/awesome-codex-plugins 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/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/carsxe/carsxe-codex-plugin/skills/auth .claude/skills/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
auth
GitHub stars
1.2k
Token cost
~460 tokens
SKILL.md length
151 words
Files
1
Skills in repo
736
Repo updated
First seen
Licence
MIT

At a glance

Set and save the CarsXE API key. An agent skill from hashgraph-online/awesome-codex-plugins.

  • Works in 4 steps: Validate the key against the CarsXE API → Persist the validated key for future… → Set CARSXE_API_KEY for the current… → …
  • Provides a CarsXE API key
  • Calls node; reaches api.carsxe.com; needs CARSXE_API_KEY and USER_PROVIDED_KEY
  • Asks to configure the plugin

What it does

Auth is an agent skill from hashgraph-online/awesome-codex-plugins. Set and save the CarsXE API key. Use this when the user provides a CarsXE API key, asks to configure the plugin, or when the session starts without a key loaded.

Its SKILL.md is about 460 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

The repository describes itself as: A curated list of awesome OpenAI Codex / ChatGPT plugins, skills, and resources. The 1 Codex Marketplace. See live plugins at: https://hol.org/plugins/best-codex-plugins. The licence is MIT.

When your agent uses it

  • Provides a CarsXE API key
  • Asks to configure the plugin
  • The session starts without a key loaded

Example prompts

  • “/auth”

Requirements

  • Node.js
  • A credential in USER_PROVIDED_KEY
  • A credential in CARSXE_API_KEY

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  1. Validate the key against the CarsXE API
  2. Persist the validated key for future sessions by writing it to the plugin config file using Node.js
  3. Set CARSXE_API_KEY for the current session so all skills work immediately without restarting
  4. Confirm

What it can do on your machine

Read from SKILL.md and the folder at commit 16b4156. 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

    Shell commands in SKILL.md call:

    • node

    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.carsxe.com

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

  • Credentials

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

    • CARSXE_API_KEY
    • USER_PROVIDED_KEY

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

Context cost

Auth loads about 460 tokens when it runs. Until then it costs about 42 tokens; SKILL.md has 151 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~42
When it runs · the whole SKILL.md, loaded when a task matches
~460

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 hashgraph-online/awesome-codex-plugins at commit 16b4156, republished under its MIT licence (© hashgraph-online). 151 words, ~460 tokens.

Download SKILL.mdSave it as .claude/skills/auth/SKILL.md (or your agent's skills folder).
name
auth
description
Set and save the CarsXE API key. Use this when the user provides a CarsXE API key, asks to configure the plugin, or when the session starts without a key loaded.
license
MIT
version
1.0.0
author
CarsXE

When the user provides a CarsXE API key or asks to configure the plugin:

  1. Validate the key against the CarsXE API:

    GET https://api.carsxe.com/v1/auth/validate?key=<USER_PROVIDED_KEY>&source=codex_plugin

  2. Persist the validated key for future sessions by writing it to the plugin config file using Node.js:

    node -e "
  const fs = require('fs');
  const os = require('os');
  const path = require('path');
  const dir = process.env.PLUGIN_DATA || process.env.CLAUDE_PLUGIN_DATA || path.join(os.homedir(), '.carsxe');
  fs.mkdirSync(dir, { recursive: true });
  fs.writeFileSync(path.join(dir, 'config.json'), JSON.stringify({ api_key: process.env.CARSXE_KEY_INPUT }));
  console.log('Saved to ' + path.join(dir, 'config.json'));
" --env CARSXE_KEY_INPUT=<USER_PROVIDED_KEY>

    This uses an environment variable to pass the key to the script, avoiding inline credential exposure.

  3. Set CARSXE_API_KEY for the current session so all skills work immediately without restarting:

    • Run the appropriate shell command for the user's platform to export CARSXE_API_KEY with the validated value.

  4. Confirm:

    "CarsXE API key validated and saved. Future sessions will load it automatically."

Verify only: If the user asks to verify their current key without changing it, call the validate endpoint with the existing CARSXE_API_KEY value and report the result.

© hashgraph-online, 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 plugins/carsxe/carsxe-codex-plugin/skills/auth of hashgraph-online/awesome-codex-plugins.

Open the folder on GitHubat commit 16b4156

Compare with similar skills

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.

Auth compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Auth this skillhashgraph-online/awesome-codex-plugins1.2k—~460Automated safety check: PassMIT
AuthEpicenterHQ/epicenter4.8k—~7kAutomated safety check: PassCustom licence
Authmicrosoft/apm4k—~756Automated safety check: PassMIT
Clerk Authdavila7/claude-code-templates32k4 repos~376Automated safety check: PassMIT
Clerk Authsickn33/agentic-awesome-skills47k2 repos~355Automated safety check: PassMIT
Nextjs Supabase Authdavila7/claude-code-templates32k3 repos~346Automated safety check: PassMIT

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Questions about Auth

What does Auth do?

Set and save the CarsXE API key. An agent skill from hashgraph-online/awesome-codex-plugins. Auth is an agent skill from hashgraph-online/awesome-codex-plugins. Set and save the CarsXE API key.

When should I use Auth?

Auth fits situations like: provides a CarsXE API key; asks to configure the plugin; the session starts without a key loaded.

How do I install Auth in Claude Code?

Run `npx skills add hashgraph-online/awesome-codex-plugins --skill auth -a claude-code`. Or copy the skill folder (plugins/carsxe/carsxe-codex-plugin/skills/auth in hashgraph-online/awesome-codex-plugins) into .claude/skills/auth in your project. Claude Code loads it when a task matches its description.

How do I install Auth in Codex?

Run `npx skills add hashgraph-online/awesome-codex-plugins --skill auth -a codex`. Or copy the skill folder (plugins/carsxe/carsxe-codex-plugin/skills/auth in hashgraph-online/awesome-codex-plugins) into .agents/skills/auth in your project. Codex loads it when a task matches its description.

Can I use 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 hashgraph-online/awesome-codex-plugins --skill 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/auth, .gemini/skills/auth, .github/skills/auth and .opencode/skills/auth in your project.

What does Auth need to run?

Going by SKILL.md and its folder, Auth needs the command-line tools its instructions call (node) and credentials named CARSXE_API_KEY and USER_PROVIDED_KEY. Our summary lists: Node.js; A credential in USER_PROVIDED_KEY; A credential in CARSXE_API_KEY.

Does Auth access the network?

SKILL.md names 1 domain. In commands or code: api.carsxe.com; the agent is likely to contact it when it follows the instructions. This is read from the text; nothing was executed.

Is Auth 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 Auth use?

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 Auth use?

About 460 tokens (SKILL.md is roughly 1.8k 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 Auth?

Skills that share tags, products or a category with Auth: Auth (EpicenterHQ/epicenter, 4.8k stars), Auth (microsoft/apm, 4k stars), Clerk Auth (davila7/claude-code-templates, 32k stars) and Clerk Auth (sickn33/agentic-awesome-skills, 47k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Auth?

hashgraph-online (a GitHub organization) maintains it in hashgraph-online/awesome-codex-plugins, which has 1,232 GitHub stars. The repository holds 736 skills in this directory. The repository was last updated on October 6, 2026.

Source: hashgraph-online/awesome-codex-plugins on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.