Qubic MCP

qubic-mcp

MCP server for the Qubic cryptocurrency — enabling AI assistants to interact with the Qubic network.

Overview

qubic-mcp is an open-source Model Context Protocol (MCP) server that gives AI assistants — Claude, ChatGPT, Copilot, Cursor, and others — native access to the Qubic blockchain.

Query balances, inspect transactions, monitor the network, trade on QX, switch between networks, and interact with smart contracts — all through natural language.

What's New in v0.4

• Smart Contract Profiles — Register custom SC interface definitions, then query them by name with automatic binary encoding/decoding
• Network Management — Save and switch between mainnet, testnet, or your own local/lite node at runtime
• Epoch Computors — Query the 676 computor identities for any epoch
• MCP Prompts — Predefined workflows for portfolio analysis, market overview, and research
• MCP Resources — Qubic reference documentation (network, tokenomics, smart contracts, address format)
• HTTP Transport — Run as a standalone HTTP server for remote deployment

Features

Blockchain Query Tools

• Balance & Transfers — Query any Qubic address balance and transfer history
• Transactions — Look up transaction details by ID
• Network Status — Current tick, epoch, supply, burned QUs, active addresses, market cap
• Mining Phase — Current MINING/IDLE phase, cycle progress, and XMR marathon status
• Epoch Computors — List all 676 computor identities for a given epoch
• Rich List — Top holders ranked by balance

Market & Analytics

• Token Price — Real-time QUBIC price compared across 3 sources (CoinGecko, Qubic API, CryptoCompare)
• QU/USD Converter — Convert between QU and USD at live rates
• Token Registry — List all registered Qubic tokens with issuer and website
• QX DEX Orderbook — Live ask/bid orders for any token on the QX decentralized exchange

Smart Contract Tools

• Register Contract — Save a custom SC interface definition (function names, input/output field schemas)
• Query Contract — Query a registered SC function by name with automatic binary encoding/decoding
• Raw SC Query — Low-level smart contract query with base64 input/output for advanced use
• List/Remove Contracts — Manage your registered contract definitions

Local Management

• Wallet Management — Save wallet addresses locally for quick access
• Network Switching — Save and switch between mainnet, testnet, or custom RPC endpoints at runtime
• Address Validation — Check format and on-chain activity
• Explorer Links — Direct links to the official Qubic block explorer

AI Context

• MCP Resources — Qubic reference docs (network, tokenomics, smart contracts, address format) available as context
• MCP Prompts — Predefined workflows: portfolio analysis, market overview, and Qubic research

Quick Start

Works with any MCP-compatible AI client — Claude, ChatGPT, Copilot, Cursor, Windsurf, Gemini, JetBrains, and more.

Add this to your client's MCP config:

{

"mcpServers": { "qubic": { "command": "npx", "args": ["mcp-server-qubic"] } } }

Where to find the config file

For other clients, check your app's MCP documentation — the config above is universal.

Then just ask in plain English:

Wallet Management

"Save my wallet UXITJAGNXUE...RAPDBE as my-main"

"List my wallets" "Remove my old-wallet"

Balances & Transfers

"What's the balance of my-main?"

"Show transfer history for my-main over the last 1000 ticks"

Price & Market

"What's the current QUBIC price?"

"How much is 1 billion QU worth in USD?" "Convert $100 to QU"

Network & Mining

"What's the current tick?"

"Show me the network status" "What mining phase are we in?" "Who are the top Qubic holders?"

QX DEX & Tokens

"What tokens are available on Qubic?"

"Show the QX orderbook for CFB" "Show bid orders for QMINE on QX"

Network Switching

"Add my local network at http://192.168.1.50:21841"

"Switch to my local network" "Switch back to mainnet" "List my networks"

Smart Contract Queries

"Register my counter contract at index 10 with these functions: [...]"

"Query counter getStats" "Query counter getValue with key 1" "List my registered contracts"

Smart Contract Development Workflow

One of the most powerful features of qubic-mcp is its smart contract profile system. If you're developing a Qubic smart contract on a local lite network, you can use the MCP to test your contract's RPC interface directly through your AI assistant.

Why This Matters

Qubic smart contracts communicate via binary-encoded structs over the /v1/querySmartContract RPC endpoint. Without tooling, this means manually encoding fields into base64, making HTTP calls, and decoding binary responses — error-prone and tedious.

With qubic-mcp, you register your contract's interface once, and then query it by name with human-readable input and output. Your AI assistant handles all the binary encoding/decoding automatically.

Step-by-Step

1. Point the MCP at your test network:

"Add my test network at http://192.168.1.50:21841 called my-testnet"

"Switch to my-testnet"

Your MCP server now talks to your local lite node instead of mainnet. This persists across sessions in ~/.qubic-mcp/networks.json.

2. Register your contract's interface:

Tell the assistant your contract's index and function definitions. Here's a simple counter contract at index 10 as an example:

Register my counter contract at index 10 with these functions:

• getStats (inputType 1): no input, output is totalKeys (uint32) and totalIncrements (uint64)
• getValue (inputType 2): input is key (uint32), output is value (uint64) and lastUpdatedTick (uint32)

The assistant will call register_contract with the proper field schema JSON. The definition is saved to ~/.qubic-mcp/contracts.json and persists across sessions.

Supported field types: uint8, uint16, uint32, uint64, int8, int16, int32, int64, identity (60-char Qubic address / 32-byte pubkey), padding (skipped bytes).

Fields support count for arrays and enum for value-to-label mapping.

3. Query your contract by name:

"Query counter getStats"

"Query counter getValue with key 1"

The MCP encodes your input into binary, calls the RPC endpoint, and decodes the response into named fields:

counter.getValue

================

value: 42 lastUpdatedTick: 22,345,678

4. Switch back to mainnet when done:

"Switch to mainnet"

Installation

From npm (recommended)

npm install -g mcp-server-qubic

From source

git clone https://github.com/fyllepo/qubic-mcp.git

cd qubic-mcp npm install npm run build

Configuration

Network Management

The easiest way to configure which Qubic network you talk to is through the built-in tools — no env vars needed:

1. Add a custom network: add_network — save your local node's IP with a friendly name
2. Switch networks: switch_network — toggle between mainnet, testnet, or any saved network
3. List networks: list_networks — see all available networks and which is active

Networks are saved to ~/.qubic-mcp/networks.json and persist across sessions. Built-in networks (mainnet, testnet) are always available.

Environment Variables

For advanced use or CI environments, you can also configure via env vars. See .env.example.

HTTP Transport

By default the server uses stdio, which is what most MCP clients expect. To run it as a standalone HTTP endpoint instead, set MCP_HTTP_PORT:

MCP_HTTP_PORT=3000 node dist/index.js

The server exposes a single /mcp endpoint that supports the MCP Streamable HTTP transport:

• POST /mcp — send JSON-RPC requests (initialize creates a session)
• GET /mcp — open an SSE stream for server notifications (requires mcp-session-id header)
• DELETE /mcp — terminate a session

All Tools

Blockchain

Market & Tokens

Smart Contract Development & Testing

Wallets

Network Management

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