encodi

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

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

Real Monte Carlo simulation of a compound event or conditional probability. Named random variables, a safe expression interpreter, seedable for reproducibility.

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

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