# Market Data

> Fetch cryptocurrency prices, market caps, charts, and trending tokens.

- Skill: `majiayu000/market-data-4` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add majiayu000/market-data-4`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/market-data-4/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/market-data-4

---


# Market Data Skill

Fetch cryptocurrency prices, market caps, charts, and trending tokens.

## Overview

Provide real-time and historical market data for cryptocurrencies using public APIs (CoinGecko free tier).

## Capabilities

- **Price lookup**: Current price of any token in USD/BTC/ETH
- **Market overview**: Top tokens by market cap, 24h volume, gainers/losers
- **Trending tokens**: Currently trending on CoinGecko
- **Price history**: Historical price data for charting
- **Token search**: Find tokens by name or symbol

## Data Sources

- CoinGecko API (free, no key required for basic queries)
- On-chain price from DEX pools via `read_contract` when needed

## Example Interactions

User: "What's the price of ETH?"
Action: Query CoinGecko for ethereum price, report USD value and 24h change

User: "Show me trending tokens"
Action: Query CoinGecko trending endpoint, list top 10 with prices

User: "How has BNB performed this week?"
Action: Query 7-day price history, summarize with high/low/change

## Notes

- Rate limits: CoinGecko free tier allows ~30 calls/minute
- For on-chain token prices, use DEX router contracts
- Always show the data source and timestamp
- For detailed CoinGecko API usage (endpoints, parameters, ID lookup), see the `coingecko` skill