/coingecko-openapi-skill

name: coingecko-openapi-skill
description: Operate CoinGecko and GeckoTerminal market data APIs through UXC with a curated OpenAPI schema, API-key auth, and read-first guardrails.

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`:

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:

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:

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

• Usage patterns: `references/usage-patterns.md`
• Curated OpenAPI schema: `references/coingecko-market.openapi.json`
• CoinGecko API docs: https://docs.coingecko.com/reference/endpoint-overview
• Authentication docs: https://docs.coingecko.com/reference/authentication