CoinGecko Agent SKILL

Give AI agents built-in knowledge of the CoinGecko API with the installable SKILL package

CoinGecko SKILL is an installable package that gives AI agents built-in knowledge of the CoinGecko API — endpoints, parameters, and common workflows — so your agent can write accurate queries and code without manual prompting.

Works with Claude Code, Gemini CLI, Codex CLI, and other SKILL-compatible agents. Setup takes under 3 minutes.

Installation

Coding Agents

Install the SKILL for agents like Claude Code, Gemini CLI, or Codex CLI.

Via skills.sh

1. Install the skills package

   npm install -g skills
   

   See npmjs/skills for details.

2. Install the CoinGecko SKILL

   npx skills add coingecko/skills -g -y
   

   -g installs globally for all agents.

Via GitHub

1. Clone the repository

   git clone https://github.com/coingecko/skills.git coingecko-skills
   
2. Move to your agent's SKILLs directory

   mv coingecko-skills ~/.claude/skills/coingecko
   

   Path varies by agent and OS. Example above is for Claude Code on Mac/Linux.

Claude Web

1. Download the SKILL package

   Download skills-main.zip from GitHub.

2. Upload to claude.ai

   Go to claude.ai/customize/skills and select + → Upload a skill.

   

   Upload the skills-main.zip file.

   

   Done — the SKILL is now active.

   

Claude Web Constraints

The SKILL includes built-in workarounds for Claude platform restrictions. If your API calls fail silently or return network errors, check the following:

Allowlist CoinGecko domains

Claude blocks outbound requests to domains not on your allowlist. Go to claude.ai/settings/capabilities, scroll to Domain allowlist, and add:

• pro-api.coingecko.com
• api.coingecko.com

Artifacts cannot make API calls directly

• Claude Artifacts run in a sandboxed environment that blocks external API calls.
• The SKILL handles this automatically by fetching data server-side first, then passing results into the Artifact as static data.

For the best experience — especially on the Claude free plan — set up the CoinGecko MCP Server alongside the SKILL.

Try It Out

Once installed, try asking your agent:

• “If I invested $100 in Bitcoin back in December 2018, how much would it be worth today?”
• “What was the ATH of XPL?”
• “What is the current market cap of DZnQi17HFgSM8mJ4nhVicz32B97XyTsd6MUVuDJgP9Jo from Solana?”
• “What are the top NFT collections this week?”

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