bybit-go-mcp 0.1.0

Bybit v5 broker MCP server with fail-closed consent gate

bybit-mcp

Bybit v5 broker MCP server for Vibe-Trading.

Exposes 17 tools to an MCP-aware agent (LLM):

• 11 read (market data + private account snapshots) — no mandate gate.
• 6 write (place / amend / cancel / cancel-all / set leverage / set TP/SL) — gated by the user-side mandate, fail-closed.

The mandate file, kill switch, daily counter, and audit ledger live in the same filesystem layout Vibe-Trading's in-repo LiveOrderGuardTool reads from, so the in-process guard and the bybit-mcp guard see the same state and the audit ledger is unified.

Quick start

# 1. Install
cd ~/eth/bybit-mcp
pip install -e ".[dev]"

# 2. Configure
cp .env.example .env
$EDITOR .env                  # set BYBIT_API_KEY / BYBIT_API_SECRET

# 3. Commit a mandate
mkdir -p ~/.vibe-trading/live/bybit
$EDITOR ~/.vibe-trading/live/bybit/mandate.json    # see schema below

# 4. Run (stdio for embedding into Vibe-Trading)
python -m bybit_mcp.server.mcp_server --transport stdio

# 4b. Or run over HTTP for curl testing
python -m bybit_mcp.server.mcp_server --transport http --port 8001

Tool surface

Tool	Type	Gated	Notes
bybit_get_tickers	read	no	public, no auth
bybit_get_kline	read	no	public, no auth
bybit_get_orderbook	read	no	public, no auth
bybit_get_funding_history	read	no	public, no auth
bybit_get_open_interest	read	no	public, no auth
bybit_get_instruments_info	read	no	public, no auth
bybit_get_recent_trades	read	no	public, no auth
bybit_get_wallet_balance	read	no	signed, needs API creds
bybit_get_positions	read	no	signed, needs API creds
bybit_get_open_orders	read	no	signed, needs API creds
bybit_get_order_history	read	no	signed, needs API creds
bybit_place_order	write	yes	deny on missing mandate / kill switch / cap breach
bybit_amend_order	write	yes	enforces the LARGER of (explicit notional, new_qty × live price)
bybit_cancel_order	write	yes	single order
bybit_cancel_all_orders	write	yes	bulk
bybit_set_leverage	write	yes	structural check only
bybit_set_trading_stop	write	yes	TP/SL price change does not alter notional math

Mandate file

A valid mandate.json is required at <runtime_root>/live/bybit/mandate.json before any write tool is callable. Without it, every order attempt returns status="blocked", decision="deny", reason="no valid mandate on file".

The schema matches Vibe-Trading's src.live.mandate.model.Mandate EXACTLY so a mandate committed by the Vibe-Trading consent UX is readable by bybit-mcp without translation, and vice versa.

{
  "schema_version": 1,
  "hard_caps": {
    "account_funding_usd": 5000.0,
    "max_order_notional_usd": 1000.0,
    "max_total_exposure_usd": 5000.0,
    "max_leverage": 3.0,
    "allowed_instruments": ["crypto"],
    "max_trades_per_day": 50
  },
  "universe": {
    "asset_classes": ["crypto"],
    "min_market_cap_usd": null,
    "min_avg_daily_volume_usd": null,
    "exclude_symbols": ["DOGEUSDT"]
  },
  "consent": {
    "created_at": "2026-06-01T00:00:00+00:00",
    "consent_token_sha256": "<sha256 of the user-side consent artifact>",
    "broker": "bybit",
    "account_ref": "bybit-acct-0001",
    "expires_at": "2026-07-01T00:00:00+00:00"
  },
  "flatten_on_halt": false
}

6-step fail-closed gate

Every write tool runs the same gate (mirrors Vibe-Trading's src.live.order_guard.LiveOrderGuardTool):

1. load_mandate — no mandate / wrong schema_version → DENY.
2. expires_at — past the user-set expiry → PAUSE_FOR_REAUTH.
3. halt_flag_set — kill switch tripped → DENY, no remote call.
4. extract_order_intent — unparseable args → DENY.
5. quantity → notional — quantity-only orders derive notional from a live quote; no quote → DENY (fail-closed). H3: if both quantity and notional_usd are present, the LARGER is enforced.
6. check_mandate — exclude-list, instrument allowance, asset class, single notional cap, post-trade exposure cap, leverage cap, daily count, funding ceiling. Structural breaches → DENY; quantitative breaches → PAUSE_FOR_REAUTH.

The daily counter is incremented only on a confirmed ALLOW whose forwarded broker result is non-error (a failed forward never placed an order and never consumes a count, H2).

Every decision writes one redacted record to <runtime_root>/live/audit.jsonl.

Audit ledger

<runtime_root>/live/audit.jsonl is the unified live-action ledger. bybit-mcp writes here, Vibe-Trading's native guard writes here, and the CLI / SSE relay reads from here.

Each record (redacted via the redact_payload helper, so api_key, secret, *token*, account_number, routing_number, ssn, etc. are "[redacted]"):

{
  "audit_id": "la_3f2c…",
  "ts": "2026-06-02T09:15:49.482+00:00",
  "session_id": "vibe-2026-06-02-session-001",
  "kind": "order_placed",
  "outcome": "accepted",
  "server": "bybit",
  "remote_tool": "bybit_place_order",
  "intent_normalized": "buy $100 BTCUSDT (linear)",
  "mandate_snapshot_ref": "<sha256 of the mandate's consent token>",
  "consent_record_ref": "bybit-acct-0001",
  "broker_request": { "category": "linear", "symbol": "BTCUSDT", "side": "Buy", "qty": "0.001" },
  "broker_response": { "orderId": "1234567890", "orderLinkId": "" },
  "gate_decision": { "allowed": true, "decision": "allow", "checked_limits": [...] },
  "error": null
}

Kill switch

Stop all live activity instantly, independent of the LLM cooperating:

# Trip the GLOBAL switch (halts all brokers)
touch ~/.vibe-trading/live/HALT
# write the trip attribution
python -c "from bybit_mcp.safety.halt import trip_halt; trip_halt('cli', 'manual stop')"

# Trip a per-broker switch (halts bybit only)
python -c "from bybit_mcp.safety.halt import trip_halt; trip_halt('cli', 'manual stop', broker='bybit')"

# Clear (this is a privileged surface action, NOT exposed as an MCP tool)
python -c "from bybit_mcp.safety.halt import clear_halt; clear_halt()"
python -c "from bybit_mcp.safety.halt import clear_halt; clear_halt(broker='bybit')"

A user can also touch the sentinel directly (the by / reason JSON body is attribution only; the file's existence is what enforces the halt).

Integration with Vibe-Trading

Add an entry to your Vibe-Trading agent.json MCP registry:

{
  "mcpServers": {
    "bybit": {
      "command": "python",
      "args": ["-m", "bybit_mcp.server.mcp_server", "--transport", "stdio"],
      "env": {
        "VIBE_RUNTIME_ROOT": "~/.vibe-trading",
        "BYBIT_API_KEY": "${BYBIT_API_KEY}",
        "BYBIT_API_SECRET": "${BYBIT_API_SECRET}",
        "BYBIT_TESTNET": "false",
        "BYBIT_BROKER_KEY": "bybit"
      }
    }
  }
}

Vibe-Trading's native LiveOrderGuardTool (in-repo, wrapping the MCPRemoteTool instances) and the bybit-mcp server share:

• The mandate file at <runtime_root>/live/<broker>/mandate.json.
• The halt sentinel at <runtime_root>/live/HALT (and per-broker).
• The daily counter at <runtime_root>/live/<broker>/trade_counter.json.
• The audit ledger at <runtime_root>/live/audit.jsonl.

This means a single mandate commit and a single HALT sentinel covers both the in-process and the cross-process (MCP) order paths.

Environment

Var	Default	Purpose
BYBIT_API_KEY	(empty = public-only)	Bybit API key
BYBIT_API_SECRET	(empty)	Bybit API secret
BYBIT_TESTNET	false	Use testnet base URL
BYBIT_HTTP_TIMEOUT	10	httpx request timeout (seconds)
BYBIT_RECV_WINDOW	5000	recv_window for signed requests (ms)
BYBIT_BROKER_KEY	bybit	Per-broker mandate/halt/counter path key
VIBE_RUNTIME_ROOT	~/.vibe-trading	Runtime root for mandate/audit/halt/counter
BYBIT_MCP_LOG_LEVEL	INFO	Logger level
BYBIT_MCP_HOST	127.0.0.1	HTTP host (when --transport http)
BYBIT_MCP_PORT	8001	HTTP port (when --transport http)

Architecture

+------------------------+        +-------------------------+
|   Vibe-Trading agent   | stdio  |   bybit-mcp process     |
|   - agent loop         |<------>|   - FastMCP server      |
|   - native guard (in-  |  HTTP  |   - MandateGate         |
|     process MCP tools) |        |   - 17 tools (11R+6W)   |
+-----------+------------+        +------------+------------+
            |                                  |
            |   <runtime_root>/live/...        |
            +----------------------------------+
                  shared state, audit ledger

The MCP server is stateless across tool calls — the mandate / halt / counter are re-read from disk on every invocation, so a user-side commit / trip is immediately visible to the next order attempt. The shared BybitClient keeps a single TCP connection open + a synced clock across the server lifetime (see server_lifespan in mcp_server.py).

Development

make install       # pip install -e ".[dev]"
make test          # pytest (95 tests, ~2s)
make lint          # ruff check
make format        # black + ruff --fix
make run-stdio     # stdio transport
make run-sse       # HTTP transport on :8001

License

MIT