n8n-nodes-coinbase-brokerage

n8n community node for Coinbase Advanced Trade (Brokerage) API, generated from OpenAPI using @devlikeapro/n8n-openapi-node.

Local dev

• Node.js >= 20 recommended
• pnpm or npm

Steps:

1. Install deps
2. Build
3. Link into n8n's custom directory

Commands

# install
pnpm install

# build
pnpm run build

# link into n8n (~/.n8n/custom)
pnpm link --global
cd ~/.n8n/custom
npm init -y
pnpm link --global @mcnug/n8n-nodes-coinbase-brokerage

# start n8n
n8n start

In n8n, search for "Coinbase Brokerage" node.

Authentication

Use Coinbase Developer Platform (CDP) API keys:

• API Key ID (looks like organizations/.../apiKeys/...)
• ES256 Private Key (PEM)

Private Key Format

The private key can be provided in two formats:

Multi-line format (recommended):

-----BEGIN PRIVATE KEY-----
MIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQg...
-----END PRIVATE KEY-----

.env format (single-line with literal \n):

-----BEGIN PRIVATE KEY-----\nMIGHAgEAMBMGByqGSM49AgEGCCqGSM49AwEHBG0wawIBAQQg...\n-----END PRIVATE KEY-----

Both formats are automatically handled - the node will convert literal \n to actual newlines.

Credentials Options

• Environment: Production or Sandbox
• Custom Base URL: Optional override (defaults to the selected environment)
• Enable Debug Logging: When on, prints non-sensitive details about the JWT to n8n logs

Tested endpoint for credentials: GET /api/v3/brokerage/key_permissions.

Debug logging

To troubleshoot 401s:

1. Edit your Coinbase credentials and enable "Enable Debug Logging".
2. Run a simple node, e.g., Operation: Key Permissions.
3. Check n8n server logs and copy the single debug line that looks like:

[n8n-nodes-coinbase-brokerage][debug] { "tag":"coinbase-advtrade-auth", ... }

Where to find logs:

• Docker: docker logs <n8n-container> -f
• n8n Desktop: View > Toggle Developer Tools > Console
• Self-hosted (systemd/pm2): check the process stdout/stderr logs

What we log (never your private key):

• environment, baseURL, method, endpoint url
• absolute URL used to compute JWT uri (query not included in uri per Coinbase docs)
• jwtUri value (e.g., GET api.coinbase.com/api/v3/brokerage/key_permissions)
• JWT header kid (apiKey) and payload times (nbf, exp, ttl)
• Base64 header and a short preview of payload (no signature)

Share that JSON blob here so we can pinpoint any mismatch.

Publishing

• Set package name to your npm scope if needed
• npm publish or pnpm publish (ensure files are built into dist/)

Credits

• https://github.com/devlikeapro/n8n-openapi-node# n8n-nodes-coinbase-brokerage

To install dependencies:

bun install

To run:

bun run index.ts

This project was created using bun init in bun v1.2.22. Bun is a fast all-in-one JavaScript runtime.