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Chess Notation Tools – FEN to ASCII Board
x402
Chess Notation Tools – FEN to ASCII Board is a paid API for AI agents from chess-notation.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-30).
Renders a FEN position string as an 8x8 ASCII chess board (White at bottom) plus a piece-by-square inventory list.
Price / call$0.02
Success—
StatusUnknown
How this service works
Render a FEN position as an 8x8 ASCII board (White at the bottom) plus a piece-by-square list.
Output
Returns an ASCII 8x8 board string with White at the bottom, an array of row strings, a list of pieces each with color, piece type, and square identifier, and a piece count. Also includes metadata fields like source and timestamp.
Example use cases
Visualize opening position after e4
“Show me an ASCII chessboard for the FEN 'rnbqkbnr/pppppppp/8/8/4P3/8/PPPP1PPP/RNBQKBNR b KQkq e3 0 1' and tell me which pieces are on which squares.”
Debug a puzzle starting position
“I have this puzzle FEN: 'r1bqk2r/pppp1ppp/2n2n2/2b1p3/2B1P3/2N2N2/PPPP1PPP/R1BQK2R w KQkq - 4 4' — can you render it as an ASCII board so I can see the piece placement?”
Review endgame piece inventory
“Can you convert this endgame FEN '8/5k2/8/3KP3/8/8/8/8 w - - 0 1' into an ASCII board and list every piece still on the board with its square?”
Technical details
Endpoint
GEThttps://chess-notation.x402tookit.com/fen-board?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a human-readable or agent-readable visual representation of a chess position from a FEN string, especially for display, debugging, or explaining board state. It is the right choice when you want both an ASCII diagram and a structured piece-by-square list in one call, rather than writing your own FEN parser.
Side effects
- Missing or malformed FEN query parameter returns an error
- Invalid FEN piece placement characters cause a parse failure
- Completely empty FEN string is rejected
- Payment not included or insufficient USDC results in 402 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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