FirmFax prop firm data

Measured conclusion: Deep-tested. L2 outcome: tools_ok.

Independent rule and fee data on 71 prop trading firms, every figure with its evidence state.

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "FirmFax prop firm data": {
      "url": "https://firmfax.com/api/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (6)

• get_firm

  One prop trading firm. Every figure states whether we hold evidence for it, and a firm whose score range spans more than one band carries no letter grade at all.

  Parameters:

  • slug (required) — string — The firm slug, e.g. "topstep".

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• get_rule_changes

  The dated record of what changed, newest first. Every entry states its KIND, and most of this tape is FirmFax correcting its own data rather than a firm changing its rules. Read counts before describing industry activity: a total taken across kinds overstates it.

  Parameters:

  • kind — string — firm = the firm changed a rule. record = FirmFax corrected its own data. withdrawn = we published an entry and then retracted it.
  • slug — string — Limit to one firm. Omit for every firm.
  • limit — number — How many entries to return, newest first. Default 50.
  • since — string — ISO date, e.g. "2026-08-01". Entries dated on or after it.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• get_evidence

  The stored reading behind a figure: the verbatim quote, the page it came from, and the date we read it. Answers "we hold none" explicitly rather than returning an empty list. `outcome` is load-bearing: a `contradicted`, `contradiction` or `absent` row records what we read, not a figure we publish. Use get_firm for the published figure.

  Parameters:

  • slug (required) — string — The firm slug, e.g. "topstep".
  • field — string — One field path, e.g. "rules.dailyLossLimit". Omit for every field we hold for this firm.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• find_firms

  Firms matching every criterion given. A firm whose record does not carry a criterion is never counted as a match and never silently dropped: it is returned separately under unknown, with the field that could not be tested. Absence is common here, so read counts before treating the matched list as the answer.

  Parameters:

  • assetClass — string — Firms recorded as offering this. 21 of 71 records name no asset class and are returned as unknown.
  • maxResetFee — number — Reset fee at or below this. 56 of 71 record no fee.
  • maxActivationFee — number — Activation fee at or below this. 42 of 71 record no fee.
  • maxConsistencyPct — number — Consistency rule at or below this. 28 of 71 record none.
  • maxDailyLossLimit — number — Daily loss limit at or below this, in the unit dailyLossLimitUnit names. 31 of 71 record none.
  • maxMinTradingDays — number — Minimum trading days at or below this, counted as minTradingDaysUnit names. 16 of 71 record none.
  • dailyLossLimitUnit — string — The unit maxDailyLossLimit is in. Daily loss limits are recorded in percent at some firms and in dollars at others, and the two are never compared: a firm recorded in the other unit is returned under unknown with its unit named.
  • maxMinDaysToPayout — number — Minimum days to first payout at or below this, counted as minDaysToPayoutUnit names. 26 of 71 record none.
  • minTradingDaysUnit — string — What maxMinTradingDays counts: calendar_days, trading_days or winning_days. A minimum is compared only with minimums counted the same way; a firm counting another way, or stating no unit, is returned under unknown with what it counts named.
  • minDaysToPayoutUnit — string — What maxMinDaysToPayout counts: calendar_days, trading_days or winning_days. A wait is compared only with waits counted the same way; a firm counting another way, or stating no unit, is returned under unknown with what it counts named.
  • minTradingDaysMinProfit — number — With winning_days only: the profit a day must reach to count. A firm whose winning days carry a different profit bar is returned under unknown.
  • minDaysToPayoutMinProfit — number — With winning_days only: the profit a day must reach to count. A firm whose winning days carry a different profit bar is returned under unknown.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• compare_firms

  Two firms side by side. Reports each figure with its evidence state and whether the pair is comparable at all: a field neither firm records is not a tie, and a field only one records is not a win. No per-field winner is declared, because the direction of "better" for several of these is a judgement the published scoring model already makes; each firm's grade is returned alongside so the verdict comes from that model rather than from this tool.

  Parameters:

  • a (required) — string — First firm slug.
  • b (required) — string — Second firm slug.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

• list_firms

  Every firm slug and name. Carries no figures, so nothing here needs evidence.

  Hints: read-only not declared · destructive not declared · idempotent not declared · open-world not declared

Publisher website

Measured by MCPYP probing. Untested fields are omitted, never estimated. Listing is always free; MCPYP never proxies calls or stores user tokens.