Verified NFL stats and Sleeper league context. Every figure carries its own source rank.
Scored across 15 tools
Most tools have clearly distinct purposes, but there is a cluster of overlapping metric-discovery and lookup tools: list_metrics (what Muffed can answer on) versus search_metrics (metrics matching a topic) largely overlap, and query_stat_leaders versus run_stat_query both return leaders on a metric (pre-computed vs computed). The descriptions do enough to disambiguate them for a careful agent, but the boundaries require reading.
Nearly all tools use snake_case verb_noun, with a consistent 'sleeper_' namespace grouping the five Sleeper tools. Minor deviations exist within that namespace (sleeper_roster_stories, sleeper_standings_story use noun_noun rather than verb_noun), but the pattern is readable and predictable.
At 15 tools this sits squarely in the well-scoped range, with each tool covering a distinct capability (metric discovery, entity lookup, computed queries, comparison, Sleeper fantasy integration, claim verification). Nothing appears redundant or padded.
The surface broadly covers the stated purpose: metric discovery/definition, entity metrics, leaders, ad-hoc queries, comparison, Sleeper league/roster/matchup views, and claim verification. Minor gaps remain (no explicit player/team search or bio/schedule endpoint), but core NFL-stats and fantasy workflows are covered.
Two players or two teams shown side by side — by default on the metrics that matter for their position, on named metrics when metrics is set, and on the full set with all:true. Each side carries its source rank. States both figures and stops: it names no winner, no margin and no recommendation. metrics takes verified panel metric keys ("qb_anya.any_a") or their plain-English names. A measure outside the verified panel, such as yards per attempt, is refused with the nearest panel metrics.
Inputs: a (required), b (required), all, season, +2 more.
Muffed's published handcuff page for one team's backfield, plus the current depth chart and injury status from Sleeper. Answers who backs up a starter, and who replaces one who is out.
Inputs: team (required).
Muffed's published editorial reads on what is real in the NFL right now — each one a dated, sourced claim with its supporting figures, from the /trends board.
Inputs: limit, subject.
The verified figures Muffed holds for one NFL player or one NFL team (by name or abbreviation, e.g. "Bijan Robinson" or "DEN"), with the source's rank where one exists. By default the headline figures for that player or team; scope "all" returns every figure held, and a named metric returns all of that metric's rows. Names are resolved against the players and teams Muffed holds; an unrecognised name returns the closest matches rather than a guess.
Inputs: entity (required), scope, metric, season, +1 more.
Muffed's published definition of a verified metric — what it measures, in plain language, from the glossary page for that term — plus which seasons it actually covers, how it is ranked, its licence and its attribution. Accepts a metric key or a common name ("cpoe", "rushing yards over expected"). Season coverage is often narrower than a decade — rushing yards over expectation exists from 2018 onward.
Inputs: metric (required).
What Muffed can answer on. By default a summary of metric families with their counts and season coverage; with search or detail:true, individual metric keys. Returns keys and coverage only, never figures.
Inputs: limit, detail, search, season, +1 more.
Top entities on one verified metric for one season, pre-sorted, each with the source's own rank and the population it was ranked against. Takes a verified panel metric key.
Inputs: metric (required), limit, order, season, +2 more.
Computes an NFL figure from a structured query rather than looking one up: a population (position, qualifying threshold), a window (seasons, weeks, a team span, a coach's tenure), one named measure, and one operation (leaders, rank, count, only-who, a per-season streak, or a share of a total). Answers questions the verified panel has no pre-computed row for — qualified superlatives, multi-season streaks, derived rates. Every response carries the executed method, the population size, the measure's definition and the data version it ran against. Figures are computed on request from nflverse data and are labelled as computed, not verified. A figure that cannot be served comes back with the reason and the nearest thing covered.
Fantasy measures answer in the convention scoring names — "standard", "half_ppr" or "ppr" — and default to half-PPR when none is named; the response says which it used. A bare "PPR" means full PPR.
measure.key takes a measure name ("rushing_yards", "half_ppr_points") or a verified panel metric key ("key_player_stats.rushing.yards", "fantasy_scoring.half_ppr_points"). A panel metric key this tool does not compute is refused with the reason.
Inputs: op (required), window (required), measure (required), population (required), +1 more.
The verified metrics that match a topic — e.g. 'screens', 'blitz', 'time to throw' — ranked by a text match over each metric's key, label, common names and board description. Up to 20 entries, each with its key, subject, season coverage and the board it belongs to. Keys and coverage only, never figures.
Inputs: query (required), season, subject.
Lists the NFL leagues a Sleeper username belongs to, with each league's id. Muffed stores nothing about the requester.
Inputs: username (required), season.
One league's name, season, size, current week, detected scoring format, and the manager-to-roster map.
Inputs: league_id (required).
Both sides of a league matchup, with the verified figures Muffed holds for the players involved and each team's record. Muffed does not project outcomes, name a winner, or recommend a lineup.
Inputs: team (required), league_id (required), week.
One team's roster mapped to the verified figures and published Muffed surfaces for each player. Players Muffed does not cover are listed as uncovered rather than omitted.
Inputs: team (required), league_id (required).
League standings derived from Sleeper's roster settings — records, points for, and points against where available. Sleeper publishes no standings endpoint, so these are computed from the roster rows.
Inputs: league_id (required).
Checks structured claims against Muffed's verified panel. Each claim comes back confirmed, wrong (with the actual value), or unverifiable (with the metric's real season coverage). Takes structured fields only, not sentences.
Inputs: claims (required).
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