Learning & Documentation MCP Servers for Codex CLI

Datamuse MCP — word-finding engine (keyless).

Dictionary MCP — wraps Free Dictionary API (free, no auth)

IETF Datatracker MCP.

MDN Search MCP

Read-only PiPic CLI and HTTP API guidance; no image bytes are transferred.

Catch spec drift before it catches you. Detect overlap, stale docs, and code drift.

Search 4M+ podcasts & YouTube, transcribe any episode, search transcripts, generate AI lessons.

Read-only Bicycle Guide registry: published guides, homes, taxonomy, capability spine. No auth.

Political Comms documentation MCP server: search docs, query the docs filesystem. No auth.

Free FAA private-pilot ground school: source-cited answers, lessons and practice questions.

Deterministic writing filter. Marks 43 AI patterns with the line and the fix.

Voice-led, FSRS-scheduled flashcards from YouTube, PDFs, web, or text. Auto-graded quizzes.

AI coding assistant for Radzen Blazor — docs, APIs, code samples, and templates for 100+ components.

Knowledge base, pricing, FAQ and KSeF 2.0 info for Faktura VAT 2026/2027 (Polish invoicing).

Look up @recipebooq/ui components: props, provider order, theme tokens, and the blank-render rules.

Browse Bible verse collections to memorize, in 48 languages. Public and read-only, no sign-in.

Ask runboth.dev in plain language: what RunBoth does, how to install it, and its limits.

Read-only Sales Leader Guide desk: writers roster and magazine pieces. Public, no authentication.

Free AI study tools: generate a personalized study plan or essay thesis statements.

Anonymous read-only access to source-backed public SHAR Production knowledge.

Multi-agent AI pipeline that generates professional Solution Architecture Documents.