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Chess Notation Tools – Square Info
x402
Chess Notation Tools – Square Info is a paid API for AI agents from chess-notation.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-29).
Returns file, rank, color, index, diagonals, mirror squares, and positional flags for a given chess square like e4.
Price / call$0.02
Success—
StatusUnknown
How this service works
File, rank, light or dark colour, 0-63 index, diagonals and mirror squares for a chess square like e4.
Output
A JSON object containing the square's file letter, rank number, file number (1–8), color (light/dark), 0-to-63 index, long diagonal length, anti-diagonal length, mirror-left-right square, mirror-top-bottom square, rotated-180 square, boolean flags for isEdge/isCorner/isCentre, a correspondence notation string, and summary/verdict/reason fields.
Example use cases
Verify square color for opening study
“Is the square c4 a light or dark square, and is it considered a centre square in chess?”
Build board index for engine integration
“What is the 0-63 index for the square g7, and what file letter and rank number does it correspond to?”
Find mirror and diagonal info for symmetry analysis
“For the chess square b2, what are its left-right mirror, top-bottom mirror, and rotated-180 equivalent squares, and how long are its diagonals?”
Technical details
Endpoint
GEThttps://chess-notation.x402tookit.com/square-info?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need low-level geometric and positional metadata about a single chess square — its color, index, diagonals, mirror squares, or edge/corner/centre classification — especially in chess tool-building, engine integration, or educational applications. Prefer over manual calculation or full board analysis endpoints when only square-specific properties are needed.
Side effects
- Invalid square input (e.g. 'z9') returns an error or null fields
- Missing required 'square' query parameter returns a validation error
- Non-standard square notation (e.g. 'E4' uppercase) may not be recognized
- Service temporarily unavailable returns a 5xx error
- Payment failure via x402 protocol returns a 402 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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