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)

Tool	Category	Description
`qtcl_create_wallet`	Wallet	Generate a new post-quantum wallet address + keypair
`qtcl_get_balance`	Wallet	Check confirmed + pending balance for any address
`qtcl_send_transaction`	Wallet	Send QTCL with flat 1-qsat fee. Supports 256-char memo
`qtcl_get_transaction`	Chain	Look up any transaction by hash
`qtcl_get_chain_info`	Chain	Block height, mempool depth, oracle consensus status
`qtcl_get_block`	Chain	Block by height or hash with quantum coherence metrics
`qtcl_get_recent_transactions`	Chain	Last 50 txs, filterable by address
`qtcl_get_quantum_metrics`	Quantum	Live W-state fidelity, entanglement witness, lattice coherence
`qtcl_get_oracle_registry`	Quantum	5 Byzantine consensus oracles — stake, uptime, heartbeat
`qtcl_get_peers`	Network	Active P2P peers and topology data
`qtcl_get_price`	Price	Live QTCL/USD from Pyth Network oracle feed

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

Parameter	Value
Native unit	QTCL
Base unit	qsat (1 QTCL = 100 qsat)
Fee per operation	1 qsat (flat)
Block time	~18 seconds
Total supply	998,380 QTCL
Block reward	8.0 QTCL
Fee burn rate	70%

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

Property	Value
Transport	SSE (Server-Sent Events)
Protocol version	MCP 2024-11-05
Endpoint	`https://qtcl-blockchain.koyeb.app/mcp/sse`
Tools	11
Auth required	None
Health check	`https://qtcl-blockchain.koyeb.app/mcp/health`

Cryptography

Primitive	Specification
Hash	SHA3-256 (NIST FIPS 202)
Signatures	Schnorr-Γ over PSL(2,R) — Fiat-Shamir on hyperbolic Fuchsian group
Encryption	HypAEAD (SHA3-256-CTR + HMAC-SHA3-256)
Key derivation	PBKDF2-HMAC-SHA256, 600,000 iterations
Address format	64-char hex (SHA3-256 of public key)
Security level	~256-bit classical / ~180-bit quantum

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

qtcl-mcp-server