"Sanity" matching MCP connectors:

Trust scoring for x402 endpoints — "should my agent pay this?" check_endpoint runs live diligence: x402 spec-compliance probe, price sanity vs market percentiles, payTo wallet on-chain activity (Base), directory presence, infra hygiene. Returns 0-100 score with per-check evidence. compare_price positions any price vs category market data. Pay-per-call via x402: $0.02/call USDC on Base, no account or API key. tools/list free.

Deterministic JSON repair for LLM agents. Strips prose preambles, fixes malformed control characters, repairs truncated structures, and validates against JSON Schema — no LLM calls, no retries. Stops session poisoning in long-running agents.