Every change Wellknown observed on this MCP server, newest first, with what it was before and what it became. Tool-surface changes carry the definition diff. Nothing here is edited after the fact.
Added "crossword", "solve_sudoku" and "sudoku" (5 tools before, 8 now)
Generate a crossword (crucigrama) — Lays out a crossword from words with clues. Returns two matrices of the same size: puzzle (the game position: "-" is a blank cell, a word's number is on its first cell, "0" marks the other cells where a letter goes, and "a/d" such as "3/4" appears when an across word and a down word start in the same cell) and solution (the same matrix with the correct letters, one grapheme per cell). placements lists every word with its number, clue, direction (across/down) and start cell; unplaced lists words that did not fit. Offer more words than you need: the engine keeps the best layout it finds. Native…
Solve a sudoku — Solves a sudoku grid (0 = empty cell; sizes 4, 6, 9, 12, 16) and says whether the solution is the only one. Free, no usage limit.
Generate a sudoku — Creates a sudoku with exactly one solution. Returns puzzle (0 = empty cell) and solution. Sizes 4, 6, 9 (default), 12 and 16; difficulty 1 easy (most clues) to 4 expert. Free, no usage limit. The same seed gives the same sudoku.
Certificate recorded, valid to 2027-01-06
Authorization not required
Unknown → Live
First tool surface recorded: 5 tools (server version 0.4.0)
https://mcp.lettras.org/mcp (mcp_streamable_http) — from mcp_registry, with the record
Showing the latest 6 events. The API returns up to 500 and filters by kind: ?kind=tool_surface_changed