radius

Radius plugin

The radius Claude Code plugin provides four skills:

• radius-dev for Radius Network application development
• x402 for paying x402 endpoints (agents, terminals, app buyers) and the protocol
• sell-api for charging for an API or for articles and pages (including charging AI crawlers while readers stay free): framework detection, radius-sdk seller setup for Hono, Express, Next.js and Astro middleware, and Workers in front of an origin, and verification with radius-cli sell check
• dripping-faucet for testnet faucet workflows

The SDK examples target radius-sdk 0.3.0 or later (sell-api targets 0.5.0 or later, for MPP and several networks), and terminal wallet examples target radius-cli 0.4.0 or later (wallet pay); radius-cli sell check needs radius-cli 0.5.0. Install the peer dependencies needed by the SDK entry point you use: @x402/core for every entry point (radius-sdk 0.7.0 and later), plus @x402/evm and viem for /client, and hono for /hono.

The evals/ directory holds the Claude Code plugin eval cases. The sell-oneshot case shares its prompt with the repository's deterministic seller evaluation (pnpm eval:payments:sell -- --case SELL-ONESHOT), which boots the app an agent writes and pays it against a mock facilitator. The transcript eval runs without an application scaffold, so the shared prompt provides an assumed manifest when no project is present. The deterministic runner supplies real Express and Hono projects and checks the written app. Use decimal USD strings such as '0.001' in skill entrypoint examples: Claude substitutes $0 and other positional placeholders even inside code fences. The plugin validator checks for accidental substitutions in those entrypoints.

Install it from the Radius tools repository, the canonical source for current Radius skills. The former skills and radius-dev-skill repository names are retired install sources.

claude plugin marketplace add radiustechsystems/tools
claude plugin install radius@tools

The plugin is radius, and the marketplace is tools. Plugin 0.2.0 replaces the older radius-dev@radius-cli install identity. Follow the one-time migration commands if it is already installed. Individual skill names stay the same; Claude's plugin prefix becomes radius, for example /radius:sell-api.

For Codex, run this in your application directory:

npx skills add radiustechsystems/tools --agent codex \
  --skill radius-dev dripping-faucet x402 sell-api --copy
npx skills list --agent codex

The installer copies each skill's SKILL.md, references and scripts into the project's .agents/skills. Start a new Codex conversation after installing. The public flat skill files are expanded reading references; install the full directories for supporting scripts.

After a new plugin version is published, update an existing installation with claude plugin update radius@tools. Automatic updates depend on the user's marketplace setting.

The plugin is versioned independently from the radius-cli and radius-sdk npm packages. Its version is in .claude-plugin/plugin.json; the GitHub marketplace lists the plugin at .claude-plugin/marketplace.json in the repository root. See the repository release instructions for validation and compatibility rules.

This plugin is distributed under the repository's MIT license.