QTCL — Quantum Blockchain MCP Server

The first post-quantum blockchain with a native Model Context Protocol server.

Connect any MCP-compatible agent to the QTCL blockchain in seconds — no SDKs, no wallet extensions, no gas estimation. One URL. 11 tools. Flat fees.

https://qtcl-blockchain.koyeb.app/mcp/sse

Connect in 30 seconds

Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS)
or %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "qtcl": {
      "type": "url",
      "url": "https://qtcl-blockchain.koyeb.app/mcp/sse",
      "name": "qtcl"
    }
  }
}

Restart Claude Desktop. You'll see a 🔨 Tools indicator when connected.

Claude.ai (Web)

Settings → Integrations → Add Integration
URL: https://qtcl-blockchain.koyeb.app/mcp/sse

Cursor / VS Code

.cursor/mcp.json:

{
  "mcpServers": {
    "qtcl": {
      "type": "sse",
      "url": "https://qtcl-blockchain.koyeb.app/mcp/sse"
    }
  }
}

Any MCP-compatible agent

{
  "type": "url",
  "url": "https://qtcl-blockchain.koyeb.app/mcp/sse",
  "name": "qtcl"
}

Direct JSON-RPC (no MCP required)

curl -X POST https://qtcl-blockchain.koyeb.app/rpc \
  -H "Content-Type: application/json" \
  -d '{"jsonrpc":"2.0","method":"qtcl_getBlockHeight","params":[],"id":1}'

Tools (11 total)

Why agents use QTCL

Flat 1-qsat fee — No gas estimation, no auctions, no MEV. Agents budget deterministically.

Fast settlement — ~18 second blocks. Submit → hash returned immediately. 1 confirmation = finality.

Post-quantum security — HypΓ cryptography (Schnorr-Γ over PSL(2,R)). Transactions are unforgeable even by quantum computers. No migration timeline to worry about.

Machine-native API — Pure JSON-RPC. One HTTP POST to transact. No Web3 libraries, no ABI encoding.

Memo field — Every transaction carries 256 chars for invoice IDs, service references, or structured agent-to-agent coordination data.

No approval pattern — No ERC-20 approve/transferFrom. Direct transfers. One call, one transaction.

Economics

Quantum infrastructure

• Oracle network: 5-oracle Byzantine consensus (3-of-5 majority voting)
• W-state: Tripartite entanglement with NPT witness
• QRNG: 5-source ensemble (ANU, Random.org, QBICK, HotBits, Fourmilab)
• Tessellation: {8,3} hyperbolic Poincaré disk, depth 5, 10,920 triangles
• Consensus: Proof of Coherence (PoC) with non-Markovian memory kernel

MCP server details

Cryptography

Agent use cases

• Agent-to-agent micropayments for API calls, compute, and data
• Escrow for multi-agent task coordination (agent A pays agent B on task completion)
• Autonomous treasury management with deterministic fee budgeting
• Verifiable payment receipts via transaction hash + memo field
• Cross-agent accounting with structured memo data
• Quantum-secured key management for high-value operations
• Decentralized agent identity anchored to QTCL addresses

Links

• Explorer: https://qtcl-blockchain.koyeb.app/
• Wallet UI: https://qtcl-blockchain.koyeb.app/tx
• Architecture: https://qtcl-blockchain.koyeb.app/hyp
• Agent docs: https://qtcl-blockchain.koyeb.app/agents
• Capability JSON: https://qtcl-blockchain.koyeb.app/agents/capability.json
• MCP health: https://qtcl-blockchain.koyeb.app/mcp/health

License

MIT