coinbase-openapi-skill

Coinbase Advanced Trade Skill

Use this skill to run Coinbase Advanced Trade REST 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.coinbase.com.
• Access to the curated OpenAPI schema URL:
  • https://raw.githubusercontent.com/holon-run/uxc/main/skills/coinbase-openapi-skill/references/coinbase-advanced-trade.openapi.json

Scope

This skill covers a curated Coinbase Advanced Trade surface for:

• product and best-bid-ask market reads
• account summary reads
• order create, cancel, and lookup workflows

This skill does not cover:

• Coinbase Exchange APIs
• Coinbase Prime APIs
• Coinbase Derivatives APIs
• wallet or retail app product families outside Advanced Trade

Authentication

Public product endpoints can be read without credentials.

Private account and order endpoints require a Coinbase Advanced Trade bearer JWT. uxc now supports Coinbase's request-scoped JWT flow directly through jwt_bearer_v1, so you can store the API key id and private key in a credential and let uxc mint the short-lived bearer token per request.

Recommended v1 setup:

1. Download or copy the Coinbase API key material:
   • key_id: organizations/{org_id}/apiKeys/{key_id}
   • private_key: Coinbase exports either -----BEGIN EC PRIVATE KEY----- or -----BEGIN PRIVATE KEY-----; uxc accepts both PEM forms for ES256.
2. Store those values in a local credential.
3. Bind the credential to api.coinbase.com with a jwt_bearer_v1 signer.

uxc auth credential set coinbase-advanced-trade \
  --auth-type api_key \
  --field key_id=env:COINBASE_KEY_ID \
  --field private_key=env:COINBASE_PRIVATE_KEY

uxc auth binding add \
  --id coinbase-advanced-trade \
  --host api.coinbase.com \
  --path-prefix /api/v3/brokerage \
  --scheme https \
  --credential coinbase-advanced-trade \
  --signer-json '{"kind":"jwt_bearer_v1","algorithm":"es256","private_key_field":"private_key","header_typ":"JWT","header_kid_field":"key_id","expires_in_seconds":120,"claims":{"static":{"iss":"cdp"},"from_fields":{"sub":"key_id"},"time":{"nbf":"now","exp":"now_plus_ttl"}},"request_claim":{"name":"uri","format":"string","value_template":"{{request.method}} {{request.host}}{{request.path}}"}}' \
  --priority 100