NobleBlocks MCP Server

Search 340 million deduplicated academic papers from Claude Desktop, Claude Web, ChatGPT, Cursor, VS Code Copilot, or any MCP-compatible tool. Covers 15+ academic databases — all cross-linked through a biomedical knowledge graph with 1.3M+ entities and 109M+ paper connections.

This is a thin authenticated client — all indexing, ranking, vector search, and knowledge graph traversal runs on the NobleBlocks backend. You get fast results without managing any infrastructure.

What's in the index

All sources are cross-deduplicated on DOI, PMID, and arXiv ID. Total unique records after dedup: 340M+ (June 2026).

Related MCP server: Semantic Scholar MCP Server

Knowledge graph

The search backend also maintains a biomedical knowledge graph (1.3M+ entities, 109M+ paper links) with genes, diseases, drugs, proteins, institutions, researchers, topics, genetic variants, and drug-target-disease relationships sourced from PubTator Central, DisGeNET, ChEMBL, UniProt, ROR, ORCID, Open Targets, and others.

Tools

Get an API key

All usage requires a free NobleBlocks account. Sign up takes 30 seconds:

1. Go to nobleblocks.com/signup

2. Create an account (email or Google)

3. Navigate to Settings > API Keys and generate a key

Free plan: 100 searches/day, 5 similar/day, citation graph access. Pro plan: 5,000 searches/day, literature review generation, priority support.

Quick start (Remote — no install needed)

The easiest way to get started is the remote connector — no API keys, no Python install:

1. Open claude.ai → Settings → Connectors (or Integrations)

2. Click "Add" and paste: https://mcp.nobleblocks.com/mcp

3. Sign in with your NobleBlocks account

4. Ask Claude: "Search for papers on CRISPR gene therapy"

Install (Local)

uvx nobleblocks-mcp

Configure Claude Desktop

Add to your Claude Desktop config (~/Library/Application Support/Claude/claude_desktop_config.json on macOS):

{
  "mcpServers": {
    "nobleblocks": {
      "command": "nobleblocks-mcp",
      "env": {
        "NOBLEBLOCKS_API_KEY": "nb_pk_your_key_here"
      }
    }
  }
}

Restart Claude Desktop. The NobleBlocks tools will appear in the tools list.

Configure VS Code Copilot

Add to .vscode/mcp.json in your project:

{
  "servers": {
    "nobleblocks": {
      "command": "nobleblocks-mcp",
      "env": {
        "NOBLEBLOCKS_API_KEY": "nb_pk_your_key_here"
      }
    }
  }
}

Configure Cursor / Cline / Continue

Point your editor's MCP settings at the nobleblocks-mcp command with stdio transport. Set NOBLEBLOCKS_API_KEY in the environment.

CLI usage

You can also search directly from the terminal:

# Search papers
nobleblocks search "CRISPR base editing" --limit 5 --min-year 2022

# Get a specific paper
nobleblocks get 10.1038/s41586-020-2649-2

# Find similar papers
nobleblocks similar "Attention Is All You Need"

# Citation graph
nobleblocks citations 10.1038/s41586-020-2649-2 --direction both

All CLI commands require NOBLEBLOCKS_API_KEY set in your environment (or pass --key).

Environment variables

Examples

Once configured, ask naturally in Claude/Cursor:

"Find the most-cited papers on CRISPR base editing from 2022-2024"

"Show me papers similar to 'Attention Is All You Need' by Vaswani"

"What papers cite DOI 10.1038/s41586-020-2649-2?"

"Find papers linking BRCA1 to drug resistance"

"Generate a literature review on CAR-T cell therapy in solid tumors"

Development

git clone https://github.com/nobleblocks/nobleblocks-mcp.git
cd nobleblocks-mcp
pip install -e .

# Test with MCP Inspector
npx @modelcontextprotocol/inspector nobleblocks-mcp

License

MIT — see LICENSE.

Built by NobleBlocks — the academic research platform for the AI era.