io.github.GammaThreeTrading/fixsim

up checked 2026-11-11T01:37:30.105Z

Unclaimed · Unverified

Agent searches it appeared in, last 30 days: 0. Run this server? Claim the listing: verified label, uptime alerts and analytics.

Publisher-provided title

FIXSIM

Publisher-provided description

Test FIX from Claude, ChatGPT, or Cursor: free sandbox FIX sessions or your own FIXSIM instances.

Summary by lookupd

Lets an agent create FIX test sessions, send and manage simulated trade orders, and inspect order and execution history on FIXSIM.

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http fixsim https://mcp.fixsim.com/mcp

Codex, remote (streamable-http)

codex mcp add fixsim --url https://mcp.fixsim.com/mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "fixsim": {
      "url": "https://mcp.fixsim.com/mcp"
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Tools (21 tools)

Publisher-provided text

• fixsim_list_orders_out Orders FIXSIM sent OUT on a session (created with fixsim_send_order). Pass clOrdId to fetch one.
• sandbox_get_status Is the user's FIX engine connected to the sandbox session? Returns state: connected, waiting (nobody logged on yet), disabled, or unknown.
• fixsim_send_order Have FIXSIM send a New Order Single (35=D) OUT on a session to the user's system, so they can test how their system handles inbound orders. Follow up with fixsi
• fixsim_list_orders_in Orders the user's trading system sent INTO FIXSIM on a session (FIXSIM is the counterparty). Includes ClOrdID, symbol, side, quantity, remaining quantity, order
• fixsim_list_executions_in Execution reports the user's system sent INTO FIXSIM on a session (when FIXSIM is the order sender and the user's system is the executing side). Optionally filt
• fixsim_act_on_orders Respond to orders the user's system sent into FIXSIM: acknowledge, fully or partially execute, reject, cancel remaining, expire, done-for-day, restate, or accep
• sandbox_set_autofill Turn automatic fills on or off for a sandbox session. On: every order the user sends is filled immediately at the security's last price. Off (default): orders a
• fixsim_cancel_order_out Have FIXSIM send an Order Cancel Request (35=F) for an order it previously sent out with fixsim_send_order.
• fixsim_list_sessions List the FIX sessions on an instance with their FIX version, CompIDs, acceptor/initiator role, host/port, enabled and logged-in state, and sequence numbers.
• fixsim_list_executions_out Execution reports FIXSIM sent OUT on a session (acks, fills, partial fills, rejects, cancels). Pass clOrdId to see the full execution history of one order: Exec
• fixsim_get_session Get one FIX session's settings and live state (logged in?, sequence numbers, connection details).
• sandbox_act_on_order Play the exchange for one order the user sent in: fill (full execution), partial (partial fill), reject, or cancel (cancel the remaining quantity). FIXSIM sends
• fixsim_get_order_in Get one inbound order by ClOrdID (tag 11), including its raw FIX message and audit trail. Use this to explain why an order was rejected or what state it is in.
• sandbox_get_orders Working orders the user's engine has sent into the sandbox session: ClOrdID, symbol, side, qty, filled, leaves, price, status.
• sandbox_get_messages The FIX message log for a sandbox session, oldest first: logons, heartbeats, orders in, execution reports out, rejects. Each message has seq, timeUtc, inbound (
• sandbox_create_session Create a free, anonymous FIX test session on the FIXSIM Developer Sandbox. No account or API key needed. Returns the connection card: host, port, the SenderComp
• sandbox_end_session End a sandbox session now instead of waiting for it to expire. Frees the slot for the user's IP.
• fixsim_send_raw_fix Send one or more raw FIX application messages OUT on a session as given (tag=value pairs separated by | or SOH). FIXSIM supplies the session header fields (Begi
• fixsim_list_instances List the FIXSIM instances your API key can access. An instance is a hosted FIX engine; each holds one or more FIX sessions. Start here to learn the instance nam
• fixsim_list_securities Securities (symbol, last price, CUSIP, ISIN) configured on an instance. FIXSIM prices fills from these.
• sandbox_get_session Re-fetch a sandbox session's connection card by id, including whether auto-fill is on and when it expires.

Details

• Version: 0.1.2
• Transports: streamable-http
• Uptime (7 days): 100%
• Median latency: 419 ms
• First indexed: 2026-11-01T09:09:45.183Z
• Last seen in registry: 2026-11-01T09:09:45.192Z
• Repository: https://github.com/GammaThreeTrading/fixsim-mcp
• Website: https://www.fixsim.com/sandbox

Badge for your README

Shows this live status and links here; updates hourly.

[![lookupd status](https://lookupd.com/badge/io.github.GammaThreeTrading/fixsim.svg)](https://lookupd.com/servers/io.github.GammaThreeTrading/fixsim)

• 62071 servers
• Last crawl: 2026-11-11T16:39:06.253Z
• API base: https://api.lookupd.com
• MCP URL: https://api.lookupd.com/mcp