Interview Prep MCP

Interview Prep MCP

Graded interview questions, model answers, answer frameworks and mock drills for AI Engineer and Investment Banking interviews, as an MCP server.

By LightCube Labs. Runs fully offline over stdio. No API keys, no account, no network calls.

• 100 AI Engineer questions: LLM fundamentals, prompting and structured output, RAG, agents and MCP, fine-tuning, evaluation, AI system design, production/cost/safety, coding.
• 106 Investment Banking questions: accounting, valuation, M&A, LBO, industry/restructuring/current events, plus 6 fit questions.
• Every question is graded Entry / Mid / Senior and has a concise model answer. Many include the likely follow-up or the common mistake.

Ask your assistant things like:

• "Give me a 5-question mock round for an AI Engineer interview, Senior level."
• "Quiz me on LBOs, then grade my answer to ib-074."
• "What would an interviewer ask after the KV cache question?"

Tools

Tool	What it does
list_topics	Roles and topic ids, with question counts per level.
get_questions	Questions by role, optional topic and level, n, offset; include_answers adds model answers.
get_answer_framework	For one question_id (e.g. aie-026, ib-003): step-by-step answer framework, model answer, follow-up, common mistake and a 1-5 scoring rubric.
random_drill	n random questions (no answers) for a timed mock round; pass seed to replay.
search_questions	Keyword search across questions and answers.

Roles: ai-engineer, investment-banking. All tools are read-only.

Install

Requires Node.js 18+.

Claude Desktop / Cursor / any MCP client (npx)

{
  "mcpServers": {
    "interview-prep": {
      "command": "npx",
      "args": ["-y", "interview-prep-mcp"]
    }
  }
}

From source

git clone https://github.com/lightcube-labs/interview-prep-mcp.git
cd interview-prep-mcp
npm install
npm run build
npm test          # spawns the server, lists tools, calls each tool once

Then point your client at node /path/to/interview-prep-mcp/build/index.js.

MCPB bundle (Claude Desktop one-click)

npx @anthropic-ai/mcpb pack . interview-prep-mcp.mcpb

Optional configuration

Each result ends with a short "More practice" footer. You can add your own links with environment variables (all optional):

Variable	Shown as
FREE_PDF_URL_AIE / FREE_PDF_URL_IB	Free Top 30 questions PDF
PLAYBOOK_URL_AIE / PLAYBOOK_URL_IB	Full interview playbook

Data

Questions live in data/questions.json (generated by scripts/build_data.py from the source markdown) and answer frameworks in data/frameworks.json. Questions reflect common public interview patterns; no company or bank affiliation. Answers are for interview preparation, not investment advice.

Corrections and new questions are welcome via issues and pull requests.

License

MIT © 2026 LightCube Labs