polymerdao/polymer-pay-proxy
skills/polymer-pay-proxy/SKILL.md
USE THIS SKILL WHEN: the user wants to proxy a request through Polymer Pay, call an x402 API directly, or needs to understand the Polymer Pay proxy URL pattern. Handles x402 payment negotiation automatically.
$ install --global
skillsauthnpx skillsauth add polymerdao/pay-apis polymer-pay-proxyInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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Last scanned: Apr 25, 2026, 8:18 PM161.8s1 file scanned
SKILL.md
- name:
- polymer-pay-proxy
- description:
- Proxy any upstream x402 request
- - path:
- /*
- method:
- ANY
- price:
- Varies
- emoji:
- 🔗
- primaryEnv:
- POLYMER_PAY_API_KEY
- registries:
- {}
- provider:
- dynamic
Polymer Pay Proxy
Proxy any upstream request through Polymer Pay; Polymer Pay handles x402 discovery and payment flow automatically.
Authentication
All requests route through the Polymer Pay proxy. Include your Polymer Pay API key in every request:
{
"headers": {
"Content-Type": "application/json",
"x-polymer-pay-api-key": "{{POLYMER_PAY_API_KEY}}"
}
}
Base URL: https://pay.polymerlabs.org/proxy/{scheme}/{host}
Common Operations
Health Check
Verify the Polymer Pay proxy is operational.
Pricing: $0.00
{
"method": "GET",
"url": "https://pay.polymerlabs.org/healthz",
"headers": {
"Content-Type": "application/json",
"x-polymer-pay-api-key": "{{POLYMER_PAY_API_KEY}}"
}
}
Response: Returns {"status":"ok"} when the proxy is healthy.
Proxy a Request
Forward any HTTP request through the Polymer Pay proxy. The proxy handles x402 payment negotiation automatically.
Pricing: Varies based on upstream endpoint
{
"method": "POST",
"url": "https://pay.polymerlabs.org/proxy/https/x402.browserbase.com/browser/session/create",
"headers": {
"Content-Type": "application/json",
"x-polymer-pay-api-key": "{{POLYMER_PAY_API_KEY}}"
},
"body": {}
}
Response: The proxied response from the upstream x402 endpoint.
When to Use
- Calling x402 endpoints — Route any x402-enabled API call through Polymer Pay without handling payments manually.
- Unified API access — Use a single Polymer Pay API key to access multiple x402-enabled services.
- Automatic payment handling — Let Polymer Pay negotiate and process payments for per-request micropayments.
Best Practices
- Never reveal your API key — Keep
POLYMER_PAY_API_KEYsecure and never expose it in logs or client-side code. - Use environment variables — Store your API key in
POLYMER_PAY_API_KEYenv var and reference{{POLYMER_PAY_API_KEY}}in requests. - Check health before use — Verify the proxy is operational with
/healthzif you encounter issues. - For errors — See @skills/polymer-pay-api-errors/SKILL.md for complete error code reference and troubleshooting
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