The Agent Skills Directory

[SAFE]: The skill serves as documentation for the x402 Foundation's payment protocol. It describes a decentralized, stateless payment system using HTTP 402 status codes.
[EXTERNAL_DOWNLOADS]: References standard development dependencies from official registries (NPM, PyPI, and GitHub). These include the @x402/ scoped packages on NPM, the x402 package on PyPI, and the github.com/x402-foundation/x402 Go module. All external references point to official protocol resources or well-known services (Coinbase CDP, Stellar, Solana, etc.).
[COMMAND_EXECUTION]: Provides standard package management commands (npm install, pip install, go get) for developers to integrate the SDKs. These are appropriate for the skill's purpose as a developer resource.
[CREDENTIALS_UNSAFE]: Demonstrates secure practice for secret management by using environment variables (e.g., process.env.EVM_PRIVATE_KEY) in all code examples instead of hardcoded keys.

x402