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NPB Official Fielding Statistics by Season
x402
NPB Official Fielding Statistics by Season is a paid API for AI agents from oracle-api-production-766f.up.railway.app, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Returns official NPB fielding statistics for all qualified fielders by position, league, and season from npb.jp BIS data
Price / call$0.005
Success—
StatusUnknown
How this service works
Japanese baseball (NPB) official fielding statistics for a given season. Returns position-by-position (first base, second base, third base, shortstop, outfield, catcher, pitcher) ranking with fielding percentage, games, putouts, assists, errors, double plays, and passed balls (catcher only) for all qualified fielders (規定試合数 met) split by Central League and Pacific League. Source: npb.jp official BIS fielding ranking. Coverage: 2005-2025 (21 seasons). Use cases: defensive metric analysis (UZR / DRS proxy), fantasy baseball defensive value, sabermetric research, lineup optimization, AI baseball analytics agents covering Japanese leagues. Input: :season (YYYY). Output: JSON {season, league, category:"fielders", source, subleagues:{central:{criteria_note,positions:{first_base:[],second_base:[],...,catcher:[],pitcher:[]}}, pacific:{...}}}. Pay-per-call $0.005 USDC on Solana mainnet.
Output
A JSON object containing season, league, category ('fielders'), source (npb.jp), and subleagues object with central and pacific keys, each containing criteria_note and positions object mapping position names (first_base, second_base, third_base, shortstop, outfield, catcher, pitcher) to arrays of ranked player records with fielding stats. Catcher records include passed balls.
Example use cases
Fantasy baseball defensive waiver wire picks
“I'm building my NPB fantasy roster for next season — can you grab this year's official fielding stats and help me identify which shortstops and outfielders had the best defensive metrics? I want to compare error rates and double plays across both leagues to find some underrated defensive prospects.”
Sabermetric defensive value research
“I'm working on a research paper about defensive performance in the NPB. Can you pull the complete 2024 fielding statistics for all qualified players, broken down by position and league? I need the putouts, assists, errors, and fielding percentage data to calculate some defensive efficiency metrics.”
Elite catcher comparison for team scouting
“We're evaluating catching prospects for our NPB team. Can you get me the official fielding rankings for catchers in both Central and Pacific League this season, specifically their fielding percentage, passed ball totals, and double play participation? I want to see who's been most efficient defensively.”
Technical details
Endpoint
POSThttps://oracle-api-production-766f.up.railway.app/v1/npb/players/fielders/:seasonWhen to prefer
Use this endpoint when you need official NPB fielding statistics broken down by position and league for a full season, especially for defensive analysis, sabermetric research, or fantasy baseball defensive value assessments. Prefer this over individual player lookups when you want ranked lists of all qualified fielders across all positions simultaneously.
Side effects
- Season out of range (pre-2005 or post-2025) returns error or empty data
- Invalid season format returns 400 bad request
- No qualified fielders for a position in a given season returns empty array
- Payment not provided or insufficient USDC causes 402 Payment Required
- Network timeout from Railway hosting causes 503
- NPB source data unavailable for very recent seasons may return incomplete results
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
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