Agent-Skills.md

Agent Skills: CoinGecko Historical

Use to open CoinGecko historical-data pages in the default browser for a coin/date or to show historical price on date X.

UncategorizedID: paulrberg/dot-agents/coingecko-historical

Repository

paulrberg/dot-agents
PaulRBergLicense: MIT
4

Install this agent skill to your local

pnpm dlx add-skill https://github.com/PaulRBerg/dot-agents/tree/HEAD/skills/coingecko-historical

Skill Files

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skills/coingecko-historical/SKILL.md

Skill Metadata

Name
coingecko-historical
Description
Use to open CoinGecko historical-data pages in the default browser for a coin/date or to show historical price on date X.

CoinGecko Historical

Open the CoinGecko historical-data page for a coin in the user's default browser, centered on a one-day window around a target date.

Arguments

  • coin-id (required): CoinGecko coin slug (e.g., bitcoin, ethereum, solana). This is the same ID used by the CoinGecko API and the cg CLI — not the ticker symbol. If the user provides only a symbol or name, resolve it first (e.g., cg search <term> -o json or https://api.coingecko.com/api/v3/search?query=<term>).
  • date (required): Target date in YYYY-MM-DD format.

Behavior

Compute DATE-1 (the day before date) and DATE+1 (the day after date), then open:

https://coingecko.com/en/coins/<coin-id>/historical_data?start=<DATE-1>&end=<DATE+1>

Use the macOS open command:

open "https://coingecko.com/en/coins/<coin-id>/historical_data?start=<DATE-1>&end=<DATE+1>"

Date arithmetic

Use BSD date (default on macOS) to compute the surrounding days:

start=$(date -j -v-1d -f "%Y-%m-%d" "$DATE" +%Y-%m-%d)
end=$(date -j -v+1d -f "%Y-%m-%d" "$DATE" +%Y-%m-%d)

Example

User invokes: /coingecko-historical bitcoin 2024-03-14

Run:

open "https://coingecko.com/en/coins/bitcoin/historical_data?start=2024-03-13&end=2024-03-15"

Notes

  • Validate the date format before computing offsets; stop and ask the user if date is missing or malformed.