cycles4sale-mcp 0.1.3

MCP server for the cycles4sale cycles marketplace on the Internet Computer — monitor supply/demand and trade + move funds non-custodially, signed locally with icp-cli.

cycles4sale-mcp

An MCP server that lets an AI agent interact with the cycles4sale cycles marketplace on the Internet Computer — live at cycles-4-sale.com.

It exposes two tiers as one uvx command:

• Monitor (read-only) — watch supply, demand, prices and the order book. No identity, no funds.
• Trade — buy and sell cycles and move ICP / cycles, non-custodially. Every call is signed locally by your own icp-cli identity; the key never leaves your machine and the canister only ever pulls the live allowance you approve.

Requirements

• Python 3.10+
• icp (icp-cli) on your PATH — the server shells out to it for every canister call and for signing. (--read-only still needs icp for the public queries, but no identity and no funds.)
• uv / uvx to run it without a manual install (optional).

Quick start

Monitor the market (no funds, no identity)

uvx cycles4sale-mcp --read-only

Only the monitor tools are registered: market_snapshot, quote, order_book, whoami.

Trade (needs an icp-cli identity + funds)

# Creates the identity if it doesn't exist and prints its principal:
uvx cycles4sale-mcp --identity my-agent \
    --max-icp-per-trade 50000000 \
    --daily-icp-budget 200000000

Fund the printed principal by sending it ICP (to buy) and/or cycles (to sell) — ICRC-1, null subaccount. The funded balance is the hard ceiling: the agent can never spend more than you put on that identity, and the caps below tighten it further.

Wiring it into an MCP client

Add the server to your client config (stdio transport). Example for a Claude-style mcpServers block:

{
  "mcpServers": {
    "cycles4sale": {
      "command": "uvx",
      "args": ["cycles4sale-mcp", "--identity", "my-agent", "--max-icp-per-trade", "50000000"]
    }
  }
}

For a read-only feed, use "args": ["cycles4sale-mcp", "--read-only"].

Streamable HTTP

To serve over HTTP (endpoint /mcp) instead of stdio:

uvx cycles4sale-mcp --read-only --http --host 127.0.0.1 --port 8080
# -> http://127.0.0.1:8080/mcp

Tools

Monitor (always available):

Tool	What it returns
market_snapshot	Supply, demand, lifetime volume, the discount/fee rates, and buyer/seller eff. discounts
quote	Live ICP price (and fee, seller proceeds) to buy num_lots whole lots
order_book	Current listings and open buy orders
whoami	The agent identity, mode, configured caps, and session spend

Trade + wallet (only when not --read-only):

Tool	What it does
my_positions	Your listing, open buy order, and ICP + cycles balances
buy	Buy cycles by committing up to max_icp_e8s of ICP
sell	List num_lots whole lots of your cycles for sale (0 delists)
cancel_buy	Cancel your open buy order and revoke the ICP allowance
cancel_listing	Cancel your listing and revoke the cycles allowance
balances	Your ICP (e8s) and cycles balances
send_icp	Send ICP to a principal
send_cycles	Send cycles to a principal
deposit_to_canister	Withdraw cycles as REAL cycles onto a canister (top up its fuel)
receive_address	Your agent principal — fund the agent by sending ICP/cycles to it

Guardrails

Flag	Effect
--read-only	Registers only the monitor tools; no identity, no funds.
--max-icp-per-trade E8S	Rejects any single ICP outflow (buy / send_icp) larger than this.
--daily-icp-budget E8S	Rejects ICP outflows once the session's cumulative total would exceed this.
--dry-run	Trade + wallet tools return the planned approve/call instead of executing it.

The daily budget is an in-process counter and resets when the server restarts. Trades are non-custodial: buy/sell approve exactly what's needed to the broker, call, then revoke the standing allowance when nothing rests.