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Quietforge Crossword Generator
x402
Quietforge Crossword Generator is a paid API for AI agents from qf-api.quietforge-studio.workers.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-11).
Generates a verified freeform crossword grid from user-supplied clue/answer pairs, returning layout JSON or print-ready PDFs
Price / call$0.02
Success—
StatusUnknown
How this service works
Pay-per-call document conversion, PDF text extraction, headless-browser rendering of a URL or HTML to PNG / JPEG / PDF, a health-probed directory of x402 pay-per-call endpoints, a sudoku generator (solver-verified, technique-graded puzzles as JSON or a print-ready A4/Letter book), a book typesetter (prose manuscript to a KDP-ready interior PDF + editable docx), a crossword generator (verified freeform grid from your clue/answer pairs as JSON or print-ready PDFs), a family tree chart layout engine (descendant / ancestor / hourglass charts from people+families JSON or a GEDCOM file, as verified layout JSON or print-ready poster and tiled PDFs), and a dataset quality audit tool (duplicates, missing values, type consistency, class imbalance, numeric outliers and PII-pattern counts for a CSV/JSON dataset, as JSON or a one-page PDF summary). Payment: x402 (USDC on Base). No signup, no API key.
Output
Returns a JSON object containing the crossword grid (rows x cols character array), across and down clue lists with positions and lengths, a numbering map of cell coordinates to answer strings, the seed used, entry count, crossing count, verified flag, and elapsed time in milliseconds. If PDF sizes were requested, returns print-ready PDF bytes for each requested page size (8x10, A4, or Letter).
Example use cases
Birthday party crossword gift
“Make me a crossword puzzle titled 'Happy 40th, Dana!' with the subtitle 'Friends & memories' using these 12 clues and answers about her life — output a classic-style letter-size print-ready PDF I can hand out at her party.”
Classroom vocabulary crossword
“Create a crossword grid for my 8th-grade science class titled 'Chapter 5 Vocab Quiz' using these 20 clue/answer pairs from the photosynthesis unit — return the JSON layout so I can embed it in our learning app.”
Branded event crossword handout
“Generate a crossword puzzle titled 'TechConf 2025' with the subtitle 'Can you crack the code?' from these 15 industry-themed clues and answers, styled elegant on A4 paper, and use seed 42 so I get the same grid every time I regenerate it.”
Technical details
Endpoint
POSThttps://qf-api.quietforge-studio.workers.dev/v1/crossword?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a verified, correctly interlocking crossword grid from your own custom clue/answer vocabulary — especially when you want both machine-readable JSON (for embedding in apps or games) and print-ready PDFs (for physical handouts or publishing) in a single pay-per-call request with no signup. Prefer this over generic puzzle libraries when grid correctness verification, reproducible seeds, and typeset PDF output in classic or elegant styles matter.
Side effects
- Fewer than 8 or more than 30 entries returns a validation error
- Duplicate answer values in the entries array cause rejection
- Answers shorter than 3 or longer than 15 letters (after stripping spaces/hyphens/accents) are rejected
- Clues exceeding 110 characters are rejected
- The solver may fail to produce a valid crossing grid if entries are too thematically narrow or have few shared letters, returning an error or empty grid
- x402 payment failure (insufficient USDC balance or wrong network) blocks the request
- Invalid page size enum value returns a schema validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| seed | integer | Optional; same seed + entries = same grid |
| sizes | array | PDF page sizes to build (PDF route only; default all three) |
| style | string | classic = sans-serif, elegant = serif with a gold rule (PDF only) |
| title | string | Printed above the grid |
| entries | array | 8-30 clue/answer pairs; answers 3-15 letters (spaces, hyphens and accents are dropped in the grid, kept in the key); clues up to 110 characters; no duplicate answers |
| subtitle | string | Optional line under the title |
Output
Schema · Response
{
"type": "json",
"example": {
"cols": 16,
"grid": [
"........P.......",
"..."
],
"rows": 19,
"seed": 40,
"clues": {
"down": [],
"across": [
{
"n": 1,
"len": 8,
"clue": "Your Sunday breakfast speciality"
}
]
},
"title": "Dana's 40th Birthday Crossword",
"entries": 18,
"verified": true,
"crossings": 17,
"numbering": [
{
"n": 1,
"col": 8,
"row": 0,
"down": null,
"across": "PANCAKES"
}
],
"elapsed_ms": 400
}
}Tags
x402
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