"author:encodi" matching MCP servers:

MCP server that validates semantic version ranges using npm's semver engine, with payment via x402 on Base mainnet.

Real public/bank/school holiday lookup for 206 countries via a rule-based calendar engine (moveable holidays like Easter computed astronomically, not guessed). Priced per call via x402/USDC on Base.

Enables AI assistants to query Spotify for what is currently playing and to search tracks, albums, artists and playlists, with optional opt-in play/pause control. It authenticates via OAuth PKCE without a client secret, requesting least-privilege scopes and keeping tokens locally outside the repository.

Validates regex, cron, and SQL expressions by executing them in real runtimes, with payments via x402 USDC on Base.

Real Monte Carlo simulation of a compound event or conditional probability. Named random variables, a safe expression interpreter, seedable for reproducibility. Priced per call via x402/USDC on Base.

MCP server that validates medical codes (ICD-10-CM with official descriptions, CPT structural checks) via a single tool, with x402 billing.