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okx-x402-payment

Sign x402 payments and return header-ready signatures with EIP-3009 fallback.

3|Updated Apr 15, 2026
Search Tags:#security#wallet#x402#onchain#eip-3009#payment-signing
One-click install
npx skills add https://github.com/Pieverse-Eng/purrfect-skills --skill okx-x402-payment
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: okx-x402-payment
Source: https://github.com/Pieverse-Eng/purrfect-skills/tree/main/okx/vendor/okx-x402-payment
Command: npx skills add https://github.com/Pieverse-Eng/purrfect-skills --skill okx-x402-payment

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Enables secure signing and submission of x402 payments to access payment-gated resources, returning a verifiable proof that can be attached to requests.

Core Features & Use Cases

  • Securely sign x402 payments using a wallet session (TEE) to generate a signature and authorization for access.
  • Provide a local EIP-3009 signing fallback when no wallet is available, enabling offline signing.
  • Replay the original API request with the correct payment header to unlock gated resources and manage access control.

Quick Start

Sign an x402 payment for a gated resource and attach the resulting header to the original request.

Frequently Asked Questions about okx-x402-payment

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I sign an x402 payment to access gated resources?▼

To sign an x402 payment, the Skill decodes the 402 payload to extract network, amount, payTo, asset, and maxTimeoutSeconds, then returns a header-ready signature and authorization to attach to your original request.

Can I use EIP-3009 for local x409 payment signing when no wallet is available?▼

Yes, you can use EIP-3009 for local x402 payment signing. The Skill provides a local signing fallback using EIP-3009 to enable offline signing when no TEE-backed wallet session is available.

What is a TEE-backed wallet session for x402 payment signing?▼

A TEE-backed wallet session securely signs x402 payments within a Trusted Execution Environment to generate a verifiable signature and authorization for accessing payment-gated resources.

How do I attach payment proof to an API request after x402 signing?▼

After x402 signing, you replay the original API request with the correct payment header containing the returned signature and authorization to unlock the gated resources.

What data is extracted from a 402 payload during payment signing?▼

The 402 payload decoding extracts the network, amount, payTo, asset, and maxTimeoutSeconds parameters to construct the correct payment signature and authorization.

Does x402 payment signing support offline scenarios?▼

Yes, x402 payment signing supports offline scenarios through the local EIP-3009 signing fallback, which generates the required signature and authorization without a wallet connection.

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