Use this tool whenever you see one raw FIX message string, typically starting with 8=FIX. The input may use pipe (|) or SOH separators. By default it returns only the human-readable hierarchical output. Set type=tags to return only the hierarchical FIX field/tag view.
Part of the Fixie MCP Server server.
Free to start. No card required.
AI agents invoke parse_fix_message to trigger processes or run actions in Fixie MCP Server. Execute operations can have side effects beyond the immediate call -- triggering builds, sending notifications, or starting workflows. Rate limits and argument validation are essential to prevent runaway execution.
parse_fix_message can trigger processes with real-world consequences. An uncontrolled agent might start dozens of builds, send mass notifications, or kick off expensive compute jobs. PolicyLayer enforces rate limits and validates arguments to keep execution within safe bounds.
Execute tools trigger processes. Rate-limit and validate arguments to prevent unintended side effects.
{
"version": "1",
"default": "deny",
"tools": {
"parse_fix_message": {
"limits": [
{
"counter": "parse_fix_message_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}See the full Fixie MCP Server policy for all 7 tools.
These attack patterns abuse exactly the kind of access parse_fix_message gives an agent. Each links to the full case and the policy that stops it:
Other execute tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Use this tool whenever you see one raw FIX message string, typically starting with 8=FIX. The input may use pipe (|) or SOH separators. By default it returns only the human-readable hierarchical output. Set type=tags to return only the hierarchical FIX field/tag view.. It is categorised as a Execute tool in the Fixie MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Fixie MCP Server MCP server in PolicyLayer and add a rule for parse_fix_message: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Fixie MCP Server. Nothing to install.
parse_fix_message is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the parse_fix_message rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for parse_fix_message. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
parse_fix_message is provided by the Fixie MCP Server MCP server (https://www.onikora.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 7 Fixie MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.