OMX

OMX is a non-custodial execution engine for Hyperliquid perpetuals. It runs on your own machine, turns an order intent (market, limit, TWAP, POV, chase) into child orders, checks every child against a pre-trade policy you configure, and writes every decision to a hash-chained audit log. A command line and an MCP server let a human or an AI agent drive it inside those limits.

OMX makes no claim about trading performance or profit. It is execution plumbing with guard rails.

Status (v0.1.0): pre-1.0. The full path (agent intent -> policy -> signed order with a builder code -> fill -> kill switch -> audit verify) has been run end to end on Hyperliquid testnet. OMX has not had an external security audit. Start on testnet, then mainnet with small size. MIT licensed, no warranty.

Eligibility

OMX is not available to persons or entities residing, located, incorporated or with a registered office in the United States, Ontario (Canada) or sanctioned territories, nor to citizens of sanctioned territories, per the Hyperliquid Terms of Use. Using a VPN or proxy, or a false residency statement, to get around this is a breach; OMX offers no way around a block. OMX does not offer outcome markets. omx eligibility asks these questions and refuses to trade when the answer is blocked; it stores only country/region codes and yes/no answers.

Non-custodial model

• Your funds stay in your own Hyperliquid account. OMX has no withdrawal or transfer code path.
• You create an API / agent wallet in your own account. It can place and cancel orders but cannot withdraw. OMX signs with that key only.
• OMX never asks for your MAIN wallet key or seed phrase. The builder-fee approval (if any) is signed by you in your own wallet.
• The config holds the agent key's file PATH or env var NAME, never the key. A config containing anything shaped like a private key is rejected, and so is a command-line argument shaped like one.

Install

python -m venv .venv
.venv/Scripts/python -m pip install "mcp>=2.3,<3" pydantic pytest   # Windows; .venv/bin/python elsewhere
.venv/Scripts/python -m pytest -q tests

Run commands from the repository root (there is no package metadata yet). Requires Python 3.11+ (tomllib; developed on 3.12). The MCP server uses the official mcp Python SDK 2.x. The live Hyperliquid venue also needs eth_account for signing.

Quick start (testnet)

OMX runs as one long-lived process, omx daemon, which owns the engine (the only thing that talks to Hyperliquid and holds the agent key), the audit-log writer and the approval executor. The CLI and the MCP server are thin clients that talk to it through files in state_dir/ipc/.

1. Create an agent wallet at app.hyperliquid-testnet.xyz (API page) and save its key in a file only your user can read, e.g. secrets/hl_agent_testnet.key.
2. Write the config and answer the eligibility questions:

   python -m omx.cli --config omx.toml init --account 0xYOUR_MAIN_ADDRESS --key-path secrets/hl_agent_testnet.key
   

   config.example.toml shows every field. Eligibility must be renewed every eligibility_ttl_days (default and maximum 30): omx eligibility.
3. Start the daemon in its own terminal and leave it running while you trade:

   python -m omx.cli --config omx.toml daemon
   

   It steps every working intent every 200 ms (TWAP/POV/chase slices are sent only while it runs). Only one daemon can run per state_dir, and only one per account (a per-account lock in %LOCALAPPDATA%\omx\locks, or lock_dir in the config). It refuses to start without a valid eligibility attestation; there is no bypass for trading. It re-checks eligibility every 10 minutes and turns cancel-only when the check fails. daemon --cancel-only starts without the check and only cancels resting OMX orders (for an expired or blocked user). Approvals, unkill, eligibility and audit repair sent to the daemon are shown in its terminal with what they would do and the request id the CLI printed; they run only after you type the confirm <code> line it prints there. Keep that terminal interactive (a real console, not < NUL or a pipe; see docs/SECURITY.md).
4. In another terminal, dry run, then send:

   python -m omx.cli --config omx.toml preview ETH buy 0.05 --algo twap --duration-s 300 --slices 5
   python -m omx.cli --config omx.toml submit  ETH buy 0.05 --algo twap --duration-s 300 --slices 5
   python -m omx.cli --config omx.toml status <intent_id>
   

   preview, submit, status, cancel and approvals approve need the daemon; without it (heartbeat older than 5 s) they stop with a message telling you to start omx daemon. After a daemon restart status of an older intent answers unknown (check the audit log and the venue), never rejected.
5. Stop everything at once: python -m omx.cli --config omx.toml kill --reason "...". It always writes the state_dir/KILL file first (no new orders from any OMX process), then cancels resting OMX orders through the daemon, or, if no daemon is running, through a one-shot cancel-only engine it builds for this (no eligibility check). Either way it exits with code 3 and a WARNING if the sweep failed or an order could not be cancelled. --all cancels every open order on the account, not only OMX ones; the scope is stored in the KILL file and honoured by the next daemon. Clearing it (unkill) asks you to type I UNDERSTAND. submit prints the intent id; after a timeout check it with status <id> and retry with --intent-id <id> (the daemon refuses an id it already took).
6. AI agents: python -m omx.cli --config omx.toml mcp (usually started by your MCP client, see docs/AGENTS.md). It holds no key and no engine and needs the daemon running.

Stopping the daemon (Ctrl+C) does not set the kill switch and cancels nothing: resting OMX orders stay on the venue and sliced intents stop sending. On the next start the engine cancels orphan OMX orders from the previous run. To cancel immediately, use omx kill.

Other commands: cancel, approvals list|approve|reject, audit verify, audit repair, fees, mcp, eligibility, approve-builder, doctor. audit verify tells a torn last line from a crash (TRUNCATED_TAIL, exit 4) apart from tampering (BROKEN, exit 3); audit repair moves only a torn tail aside, after you type REPAIR AUDIT.

Controls

Every child order passes all of these before it can leave your machine:

1. Coin allowlist
2. Liquidity floor (24 h traded notional) and resting depth near mid
3. Price band vs mid, intent limit price, per-intent slippage cap
4. Per-coin worst-case notional (position plus all same-side resting orders)
5. Account-wide worst-case notional
6. Worst-case leverage vs equity
7. Daily loss limit (deposits and withdrawals kept out of P&L)
8. Market-data freshness
9. Kill switch (a file in state_dir; any process can trip it; omx kill also cancels resting OMX orders)
10. Hash-chained audit log (omx audit verify)

Plus a per-child notional cap, reduce-only checks, and for AI agents: an on/off switch, an agent coin subset, a per-intent human-approval threshold, a daily agent notional budget, approvals that expire, and no ability to unkill or change limits. See docs/SECURITY.md, docs/FEES.md, docs/AGENTS.md.

Builder fee

OMX is free software; the maintainers are paid through a Hyperliquid builder code. When omx/config.py names a default builder for the network (DEFAULT_BUILDER), omx init sets it at 1 bp (0.01 % of filled notional). --no-builder sends no builder code, --fee-tenths-bps sets a lower fee, and --builder-address uses your own. Nothing is charged until you approve the fee from your own wallet (omx approve-builder), and you can revoke it at any time. omx fees shows the exact rate and the exact max rate you would approve, before you approve anything. Details in docs/FEES.md.

Enforcement. With [builder] address and fee_tenths_bps > 0 set, the engine itself attaches {"b": address, "f": fee} to every order it sends. Intents (CLI, MCP, approvals) have no builder field, so no caller can set or remove it; a child order carrying any other builder is refused. The builder address must differ from the account and from the agent wallet. The daemon reads maxBuilderFee for (account, builder) at start and every 10 minutes (every 60 s while blocked). While the approved maximum is below the configured fee it is in BUILDER_NOT_APPROVED: new intents are refused with that reason and the hint omx approve-builder; working intents finish or can be cancelled; omx kill always works.

Approve in your browser, no key in OMX:

python -m omx.cli --config omx.toml approve-builder                       # approves the configured fee
python -m omx.cli --config omx.toml approve-builder --max-fee-rate 0.02%  # a higher maximum
python -m omx.cli --config omx.toml approve-builder --revoke              # maxFeeRate 0%

It serves one page on 127.0.0.1 (random port and path) and opens your browser (--no-browser only prints the URL; --timeout-s stops it, default 900). The page uses your browser wallet (window.ethereum): it checks that the selected account is account_address, asks the wallet to sign HyperliquidTransaction:ApproveBuilderFee, sends the signed approval from the browser straight to Hyperliquid's /exchange and re-reads maxBuilderFee. OMX's Python process never receives a key or the signature.

Check the setup: python -m omx.cli --config omx.toml doctor prints OK / FAIL (with the fix) / SKIP for: config, key file, agent address (never the key), endpoint, account exists, account mode, account value, agent approved for the account, builder approval vs configured fee, builder account value >= 100 USDC, builder account mode, eligibility, daemon running. It only reads /info, and only when you run it.

Account modes: OMX reads the account's Hyperliquid userAbstraction at start and every 10 minutes. Standard accounts (disabled / default) use the perp account value as equity. Unified accounts (unifiedAccount, the default for users) keep one USDC balance in the spot clearinghouse, so OMX takes equity from the spot USDC total. The docs do not say whether total already holds the open positions' unrealized P&L; a testnet measurement (2026-11-05, 9 of 9 intervals: total moved with the unrealized P&L to 1e-6) shows it does, so the equity is total itself. Positions always come from the perp clearinghouse state. portfolioMargin, dexAbstraction or an unreadable mode refuse new intents with ACCOUNT_MODE_UNSUPPORTED (kill and cancels still work). Switching to Manual / Standard is optional; builder addresses must be standard to accrue fees. python tools/measure_account_mode.py --config omx.toml --samples 10 --interval 30 (read-only, no key) prints both candidate equities and, with an open position whose P&L moves, which one the venue uses.

Test wallets: python tools/new_test_wallet.py --out secrets/testnet_builder.key creates a new throwaway key (never overwrites a file, restricts it to your user) and prints only its address. Use it for test wallets only (a testnet builder, a Base Sepolia payer), never for real funds.