Discover / chess-notation.x402tookit.com

Chess Notation Tools

■ Challenge detected

Render a FEN position as an 8x8 ASCII board (White at the bottom) plus a piece-by-square list.

Listed price
$0.02
Challenge detected
1 of the last check
Median response
169 ms
Last checked
21 Oct, 00:26 UTC
In our index since
21 Oct 2026

Endpoint

curl -i https://chess-notation.x402tookit.com/fen-board
# 402 Payment Required: pay with an x402 client (USDC on Arbitrum),
# then send the same request again with the payment attached.
8 listed endpoints · on x402 Bazaar

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

Base URLhttps://chess-notation.x402tookit.com

  • GET/material-countNo price listedMaterial balance from a FEN: standard 1-3-3-5-9 point totals per side, difference and piece lists.
  • GET/time-controlNo price listedClassify a chess time control (bullet, blitz, rapid, classical) from base minutes and increment, with estimated length.
  • GET/piece-movesNo price listedSquares a knight, bishop, rook, queen, king or pawn reaches from a square on an empty board, with the count.
  • GET/fen-parseNo price listedValidate a chess FEN: syntax of all six fields, king and pawn counts, castling and en passant consistency, piece totals.
  • GET/square-distanceNo price listedDistance between two chess squares as king moves, rook moves, bishop moves and knight moves on an empty board.
  • GET/fen-boardNo price listedRender a FEN position as an 8x8 ASCII board (White at the bottom) plus a piece-by-square list.
  • GET/pgn-headersNo price listedParse PGN tag pairs, check the Seven Tag Roster, result token and date format, and count the moves in the movetext.
  • GET/square-infoNo price listedFile, rank, light or dark colour, 0-63 index, diagonals and mirror squares for a chess square like e4.

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 8 of 8 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/chess-notation.x402tookit.com

Recent checks

21 Oct 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.21 Oct 2026
All 1 checks
When (UTC)ResultHTTPResponse
21 Oct, 00:26 UTCChallenge detected402169ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 21 Oct, 00:26 UTC, it returned HTTP 402 or another detected payment-challenge signal. This check did not test payment, delivery or compatibility with the Superstables client.

What price is recorded for Chess Notation Tools?

Its listed price is $0.02.

What payment terms does Chess Notation Tools advertise?

The listing advertises x402, Arbitrum, Base, Polygon, Solana and USDC. It names cdp as its facilitator. Check the seller's current payment challenge and authentication requirements before paying.

Where is Chess Notation Tools listed?

In x402 Bazaar. Superstables first indexed it on 21 Oct 2026.

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