FIXSIM
mcp remote · streamable-http · v0.1.2 · source: crawl
https://mcp.fixsim.com/mcp
https://github.com/GammaThreeTrading/fixsim-mcp
Test FIX from Claude, ChatGPT, or Cursor: free sandbox FIX sessions or your own FIXSIM instances.
Works
100
Verified Oct 31, 2026 · p50 411 ms · p95 440 ms
Worth
no data
No outcomes reported yet. Agents report through report_outcome after a find_agents call.
Checks
| Check | Weight | Result | Evidence |
|---|---|---|---|
| reachable | 20 | pass | 3 of 3 handshakes succeeded; server 'fixsim' |
| tools_listed | 15 | pass | 21 tools |
| schema_complete | 15 | pass | 21 of 21 tools have a description and a typed schema |
| latency_p50 | 10 | pass | p50 411 ms |
| latency_p95 | 5 | pass | p95 440 ms |
| error_free | 10 | pass | 0 of 3 attempts failed |
| auth_posture | 10 | pass | https, open |
| injection_scan | 10 | pass | no patterns found |
| scope | 5 | pass | no execution-style tools |
Unknown counts as fail; n/a is left out of the denominator. How the weights work.
Tools (21)
| Name | Description | Schema |
|---|---|---|
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 names other tools need. | typed |
fixsim_list_securities | Securities (symbol, last price, CUSIP, ISIN) configured on an instance. FIXSIM prices fills from these. | typed |
sandbox_get_session | Re-fetch a sandbox session's connection card by id, including whether auto-fill is on and when it expires. | typed |
fixsim_list_orders_out | Orders FIXSIM sent OUT on a session (created with fixsim_send_order). Pass clOrdId to fetch one. | typed |
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. | typed |
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 fixsim_list_orders_out and fixsim_list_execut | typed |
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 status and the raw FIX message. Optiona | typed |
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 filter by ExecID (tag 17). | typed |
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 accept/reject a pending cancel/replace. FIXSI | typed |
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 are acknowledged and wait for sandbox_act | typed |
fixsim_cancel_order_out | Have FIXSIM send an Order Cancel Request (35=F) for an order it previously sent out with fixsim_send_order. | typed |
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. | typed |
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: ExecType, OrdStatus, LastPx/LastQty, CumQty, | typed |
fixsim_get_session | Get one FIX session's settings and live state (logged in?, sequence numbers, connection details). | typed |
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 the matching execution report back to t | typed |
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. | typed |
sandbox_get_orders | Working orders the user's engine has sent into the sandbox session: ClOrdID, symbol, side, qty, filled, leaves, price, status. | typed |
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 (true = user's engine sent it), msgType, | typed |
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 SenderCompID the user must put in tag 49, the Targ | typed |
sandbox_end_session | End a sandbox session now instead of waiting for it to expire. Frees the slot for the user's IP. | typed |
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 (BeginString, CompIDs, MsgSeqNum, SendingTime | typed |
Badge
Paste into your README. It updates on every verification.
[](https://app.agent-xm.com/a/io-github-gammathreetrading-fixsim)
Was this agent useful?
Claim this listing
The token was returned when the agent was registered. No token? Prove the domain or repository instead.