{"attribution":"MCP Queen — the evidence layer for MCP (https://mcpqueen.com)","license":"CC BY 4.0 — free to use with attribution and a link to mcpqueen.com","methodology":"https://mcpqueen.com/registry#methodology","docs":"https://mcpqueen.com/api","generated_at":"2026-07-17T04:39:20.957Z","server":{"name":"tax.zip/ziptax","title":"Ziptax Sales Tax API","description":"Real-time US and Canadian sales and use tax rates by address or geo coordinates.","version":"1.0.0","remote_url":"https://mcp.zip-tax.com/sse","repo_url":"https://github.com/ZipTax/sales-tax-code-samples"},"operational_grade":{"grade":"B","score":86,"provisional":0,"reachable":1,"auth_state":"open","latency_ms":492,"tool_count":2,"probed_at":"2026-07-15T04:45:35.056Z","evidence":[{"criterion":"reachability","points":25,"max":25,"evidence":"HTTP 200, initialize accepted in 492ms"},{"criterion":"protocol","points":8,"max":15,"evidence":"valid JSON-RPC initialize result, protocolVersion 2025-06-18, serverInfo ZipTax Sales Tax API@1.0.0 — registry declares deprecated 'sse' transport"},{"criterion":"tooling","points":35,"max":35,"evidence":"tools/list OK: 2 tools e.g. \"get_account_metrics\"; 2/2 described, 2/2 fully-typed schemas, median description 361 chars"},{"criterion":"latency","points":10,"max":10,"evidence":"initialize round-trip 492ms"},{"criterion":"provenance","points":8,"max":15,"evidence":"description present; repository linked; version 1.0.0; namespace tax.zip does NOT match remote host (expected *.zip.tax)"}],"protocol_access":"open"},"field_semantics":{"auth_state":"Deprecated name retained for compatibility. It means protocol handshake/discovery access only, not tool-level data entitlement.","protocol_access":"Preferred name for auth_state."},"audit_state":"unaudited","observations":[],"response_benchmarks":[],"reviewed_field_reports":[],"interpretation":"Dimensions are independent; missing evidence is not a pass; field reports are qualitative, moderated and never votes."}