{"schema_version":"v1","name_for_human":"Agent Card Validator MCP","name_for_model":"agent_card_validator_mcp","description_for_human":"Audit + lint any x402/A2A service's discovery surfaces. Score 0-100, fix list, schema validation.","description_for_model":"Use this plugin to grade x402/A2A service quality before integration. POST /v1/wellknowns/audit returns a 0-100 score across 5 well-knowns (agent-card, ai-plugin, openapi, mcp, agent-discovery) plus sub-scores plus an improvement TODO list. POST /v1/wellknowns/lint runs a strict JSON-schema validation of agent-card.json against the Google A2A AgentCard spec subset and returns errors at fatal/error/warn severities. Both endpoints require pay-per-call USDC on Base via x402 — no signup, no API key. Use audit for portfolio quality monitoring, CI gating, or pre-integration vetting; use lint for strict CI fail-fast on malformed agent-cards.","auth":{"type":"x402"},"api":{"type":"openapi","url":"https://agent-card-validator-mcp.mtree.workers.dev/openapi.yaml"},"logo_url":"https://agent-card-validator-mcp.mtree.workers.dev/.well-known/logo.png","legal_info_url":"https://agent-card-validator-mcp.mtree.workers.dev/agent-discovery"}