Run A/B experiments through your AI assistant. SDKs for Ruby, Python, JS, Node, React Native, Go.

Cost tracking for DeepSeek Harness: session and model costs, token usage, budgets, provider balances, and coding-plan quotas. Bilingual English/Chinese UI.

Claude Cup — worldwide building contest. Track your Value/Token Ratio, climb the real-time leaderboard, and fill a live trophy in your terminal.

Creating algorithmic art using p5.js with seeded randomness and interactive parameter exploration. Use this when users request creating art using code, generative art, algorithmic art, flow fields, or particle systems. Create original algorithmic art rather than copying existing artists' work to avo

When the user wants to set up, improve, or audit analytics tracking and measurement. Also use when the user mentions "set up tracking," "GA4," "Google Analytics," "conversion tracking," "event tracking," "UTM parameters," "tag manager," "GTM," "analytics implementation," "tracking plan," "how do I m

Circulara Observe MCP plugin - meters your AI agents' token spend and carbon, free tier.

19 tools (14 free, 5 x402-metered): GSPC board, evidence, Ed25519 card verify. Measurement only.