{"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":"2026-10-23T10:42:14.385Z","server":{"name":"io.ddx.pg/archive","title":"pg.ddx.io: the PostgreSQL community's memory","description":"Every PostgreSQL mailing list since 1991, linked to the commits, code, commitfest and docs.","version":"2026.10.22","remote_url":"https://pg.ddx.io/mcp","repo_url":null},"operational_grade":{"grade":"A","score":94,"provisional":0,"reachable":1,"auth_state":"open","latency_ms":645,"tool_count":29,"probed_at":"2026-10-23T07:16:21.627Z","evidence":[{"criterion":"reachability","points":25,"max":25,"evidence":"HTTP 200, initialize accepted in 645ms"},{"criterion":"protocol","points":15,"max":15,"evidence":"valid JSON-RPC initialize result, protocolVersion 2025-06-18, serverInfo pg.ddx.io@1.0"},{"criterion":"tooling","points":35,"max":35,"evidence":"tools/list OK: 29 tools e.g. \"retrieve_context\"; 29/29 described, 29/29 fully-typed schemas, median description 426 chars"},{"criterion":"latency","points":7,"max":10,"evidence":"initialize round-trip 645ms"},{"criterion":"provenance","points":12,"max":15,"evidence":"description present; no repository URL; version 2026.10.22; namespace io.ddx.pg matches endpoint/repo"}],"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":"observations_published","observations":[{"dimension":"citation_quality","metric":"citation_capability_advertised","status":"unverified","value_text":null,"evidence":"Metadata/tool descriptions advertise citation or evidence capability: Searches every mailing list (inbox narrows it) with hybrid keyword + semantic ranking and returns cited passages that fit token_budget (default 4000, max 32000): one passage per thread, each the author's own words (quotes, signature and patch removed, cut at ~120 | get_callers Reverse call graph: the symbols that call or reference qualified_name (from search_symbols), each with its file and lines, like `git grep -w <name>` restricted to call sites | get_message One mail message by Message-ID: headers, in_reply_to/references, decoded body text (by default the author's own words: quotes, signature and inline patch removed; full_text=true for everything, quotes included), attachments. No response-level citation benchmark has verified this claim yet.","source_type":"live_probe","sample_size":null,"observed_at":"2026-10-23T07:16:21.627Z","methodology_version":"trust-v1"},{"dimension":"security","metric":"authentication_boundary","status":"observed","value_text":"open","evidence":"Live protocol probe observed auth_state=open. This describes discovery/access behavior; it is not by itself a vulnerability finding.","source_type":"live_probe","sample_size":null,"observed_at":"2026-10-23T07:16:21.627Z","methodology_version":"trust-v1"}],"response_benchmarks":[],"reviewed_field_reports":[],"interpretation":"Dimensions are independent; missing evidence is not a pass; field reports are qualitative, moderated and never votes."}