coingecko-openapi-skill

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Operate CoinGecko and GeckoTerminal market data APIs through UXC with a curated OpenAPI schema, API-key auth, and read-first guardrails.

4installs
Sourceholon-run/uxc
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NPX Install

npx skill4agent add holon-run/uxc coingecko-openapi-skill

Tags

Translated version includes tags in frontmatter
uxccoingeckogeckoterminalopenapimarket-data

SKILL.md Content

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CoinGecko And GeckoTerminal Skill

Use this skill to run CoinGecko market data and GeckoTerminal onchain DEX operations through 
uxc
+ OpenAPI.
Reuse the 
uxc
skill for shared execution, auth, and error-handling guidance.

Prerequisites

  • uxc
    is installed and available in 
    PATH
    .
  • Network access to 
    https://api.coingecko.com/api/v3
    .
  • Access to the curated OpenAPI schema URL: 
    • https://raw.githubusercontent.com/holon-run/uxc/main/skills/coingecko-openapi-skill/references/coingecko-market.openapi.json
  • A CoinGecko Demo API key.

Scope

This skill covers a read-first market data surface:
  • API liveness checks
  • spot price lookup
  • asset ID discovery
  • market screener reads
  • trending reads
  • GeckoTerminal network discovery
  • onchain token price lookup
  • trending pool reads
This skill does not cover:
  • paid or enterprise-only method families beyond the selected v1 scope
  • historical chart or OHLC families
  • portfolio, NFT, or onchain trade execution
  • the full CoinGecko or GeckoTerminal API

Authentication

The default host uses CoinGecko Demo auth with 
x-cg-demo-api-key
.
Configure one API-key credential and bind it to 
api.coingecko.com/api/v3
:
bash
uxc auth credential set coingecko-demo \
  --auth-type api_key \
  --api-key-header x-cg-demo-api-key \
  --secret-env COINGECKO_DEMO_API_KEY

uxc auth binding add \
  --id coingecko-demo \
  --host api.coingecko.com \
  --path-prefix /api/v3 \
  --scheme https \
  --credential coingecko-demo \
  --priority 100
Validate the active mapping when auth looks wrong:
bash
uxc auth binding match https://api.coingecko.com/api/v3

Pro Host Override

If you have a Pro plan, keep the same curated schema and create a separate credential, binding, and link:
bash
uxc auth credential set coingecko-pro \
  --auth-type api_key \
  --api-key-header x-cg-pro-api-key \
  --secret-env COINGECKO_PRO_API_KEY

uxc auth binding add \
  --id coingecko-pro \
  --host pro-api.coingecko.com \
  --path-prefix /api/v3 \
  --scheme https \
  --credential coingecko-pro \
  --priority 100

uxc link coingecko-pro-openapi-cli https://pro-api.coingecko.com/api/v3 \
  --schema-url https://raw.githubusercontent.com/holon-run/uxc/main/skills/coingecko-openapi-skill/references/coingecko-market.openapi.json

Core Workflow

  1. Use the fixed link command by default:
    • command -v coingecko-openapi-cli
    • If missing, create it: 
      uxc link coingecko-openapi-cli https://api.coingecko.com/api/v3 --schema-url https://raw.githubusercontent.com/holon-run/uxc/main/skills/coingecko-openapi-skill/references/coingecko-market.openapi.json
    • coingecko-openapi-cli -h
  2. Inspect operation schema first:
    • coingecko-openapi-cli get:/simple/price -h
    • coingecko-openapi-cli get:/coins/markets -h
    • coingecko-openapi-cli get:/onchain/simple/networks/{network}/token_price/{addresses} -h
  3. Prefer narrow read validation before broader reads:
    • coingecko-openapi-cli get:/ping
    • coingecko-openapi-cli get:/coins/list include_platform=false
    • coingecko-openapi-cli get:/onchain/networks
  4. Execute with key/value parameters:
    • coingecko-openapi-cli get:/simple/price ids=bitcoin,ethereum vs_currencies=usd
    • coingecko-openapi-cli get:/coins/markets vs_currency=usd ids=bitcoin,ethereum order=market_cap_desc per_page=10 page=1
    • coingecko-openapi-cli get:/onchain/simple/networks/{network}/token_price/{addresses} network=eth addresses=0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48

Operation Groups

Market Data

  • get:/ping
  • get:/simple/price
  • get:/coins/list
  • get:/coins/markets
  • get:/search/trending

GeckoTerminal Onchain Data

  • get:/onchain/networks
  • get:/onchain/simple/networks/{network}/token_price/{addresses}
  • get:/onchain/networks/trending_pools

Guardrails

  • Keep automation on the JSON output envelope; do not use 
    --text
    .
  • Parse stable fields first: 
    ok
    , 
    kind
    , 
    protocol
    , 
    data
    , 
    error
    .
  • Treat this v1 skill as read-only. Do not imply wallet, trading, or portfolio mutation support.
  • Demo and Pro hosts use different API-key headers. If the default Demo credential fails against the Pro host, create a separate Pro credential rather than reusing the Demo header name.
  • The Pro host needs its own auth binding on 
    pro-api.coingecko.com/api/v3
    ; creating only a credential is not enough for linked calls to send 
    x-cg-pro-api-key
    .
  • CoinGecko public and Demo limits are tighter than Pro. Keep default examples narrow and avoid large paginated loops without explicit user intent.
  • The GeckoTerminal endpoints in this schema share the same API root and auth flow as the rest of the curated CoinGecko host contract.
  • coingecko-openapi-cli <operation> ...
    is equivalent to 
    uxc https://api.coingecko.com/api/v3 --schema-url <coingecko_openapi_schema> <operation> ...
    .

References