Muffed MCP server
{
"mcpServers": {
"muffed": {
"type": "http",
"url": "https://muffed.ai/api/mcp"
}
}
}{
"mcpServers": {
"muffed": {
"type": "http",
"url": "https://muffed.ai/api/mcp"
}
}
}{
"mcpServers": {
"muffed": {
"type": "http",
"url": "https://muffed.ai/api/mcp"
}
}
}{
"servers": {
"muffed": {
"type": "http",
"url": "https://muffed.ai/api/mcp"
}
}
}{
"mcpServers": {
"muffed": {
"type": "http",
"url": "https://muffed.ai/api/mcp"
}
}
}file .mcp.json (in your project root)file claude_desktop_config.jsonfile ~/.cursor/mcp.jsonfile .vscode/mcp.jsonfile ~/.codeium/windsurf/mcp_config.jsonversion 1.0.3
What it does
Muffed exposes verified NFL statistics (520 metrics, 2016–2025) and Sleeper fantasy league data through a read-only HTTP MCP server. Each figure is returned with its source rank, population size, attribution, and as-of date. It is aimed at developers and AI client users who want current, ranked NFL stats without relying on model training data.
- Retrieve ranked NFL player or team metrics such as EPA splits, CPOE, or rushing yards over expectation for a given season.
- Check whether a specific statistic an AI has already stated is correct by running it through the verify_claim tool against the verified data panel.
- Load a Sleeper fantasy league's roster, standings, and matchup context alongside verified player stats to inform lineup decisions.
Tools this server exposes
| Tool | Does |
|---|---|
| get_current_insights | Returns what Muffed considers currently verified and notable about the NFL, with evidence and dates. |
| query_stat_leaders | Returns league leaders on a specified verified metric, each accompanied by the rank its source assigned. |
| get_entity_metrics | Returns all verified figures Muffed holds for a single player or team. |
| compare_entities | Places two players or two teams side by side on the metrics both share. |
| get_metric_definition | Returns what a metric measures and the seasons for which data actually exists. |
| list_metrics | Lists all metrics that can be queried, including their keys and season coverage, without returning figures. |
| verify_claim | Checks a stated figure against the verified panel and returns whether it is confirmed, wrong, or unverifiable. |
| get_backfield | Returns the backup depth behind a starting running back, or the replacement if the starter is injured. |
| run_stat_query | Computes a figure on request (superlatives, streaks, derived rates) and labels it computed rather than verified, with method and population noted. |
| sleeper_find_leagues | Returns the Sleeper leagues associated with a given username. |
| sleeper_get_league | Returns a Sleeper league's configuration including teams, scoring format, roster slots, and managers. |
| sleeper_matchup_preview | Returns verified NFL context for both sides of a specified Sleeper matchup. |
| sleeper_roster_stories | Returns each player on a Sleeper roster along with verified metrics for that player. |
| sleeper_standings_story | Returns the current standings for a Sleeper league derived from its roster records. |
Before you enable it
An MCP server runs with whatever access you give it. Start with a development account rather than production, and check which tools the server exposes before you let an agent call them unattended.