APIVerve

Cryptogram Generator API

GET
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Create ready-to-solve cipher puzzles from custom text or quotes.

Cryptogram Generator creates letter substitution cipher puzzles where each letter is replaced with another letter consistently throughout the text.

Try it — live request, no key required

Request
GETapi.apiverve.com/v1/cryptogram
Verification
Format

No key required to try it. Get a key to use it in your app.

Example
{
  "status": "ok",
  "error": null,
  "data": {
    "encoded": "PNR MJSXQRV JI K PNJSGKQC DBFRG ARWBQG ZBPN K GBQWFR GPRY",
    "original": "The journey of a thousand miles begins with a single step",
    "cipher": {
      "A": "K",
      "B": "A",
      "C": "H",
      "D": "C",
      "E": "R",
      "F": "I",
      "G": "W",
      "H": "N",
      "I": "B",
      "J": "M",
      "K": "E",
      "L": "F",
      "M": "D",
      "N": "Q",
      "O": "J",
      "P": "Y",
      "Q": "T",
      "R": "X",
      "S": "G",
      "T": "P",
      "U": "S",
      "V": "L",
      "W": "Z",
      "X": "O",
      "Y": "V",
      "Z": "U"
    },
    "letterCount": 47,
    "wordCount": 11,
    "html": "<html><head><title>Cryptogram Puzzle</title><style>body {font-family: Arial, sans-serif; padding: 20px; max-width: 800px; margin: 0 auto;}h1 {text-align: center;}.puzzle {font-family: monospace; font-size: 24px; letter-spacing: 3px; line-height: 2.5; word-wrap: break-word;}.letter-box {display: inline-block; text-align: center; margin: 2px;}.encoded {border-bottom: 2px solid #333; min-width: 20px; display: block;}.answer {color: #ccc; font-size: 14px;}.space {width: 15px; display: inline-block;}.hint {margin-top: 30px; padding: 15px; background: #f5f5f5; border-radius: 5px;}.hint h3 {margin-top: 0;}</style></head><body><h1>Cryptogram</h1><div class='puzzle'><span class='letter-box'><span class='encoded'>P</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>N</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>R</span><span class='answer'>_</span></span><span class='space'></span><span class='letter-box'><span class='encoded'>M</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>J</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>S</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>X</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>Q</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>R</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>V</span><span class='answer'>_</span></span><span class='space'></span><span class='letter-box'><span class='encoded'>J</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>I</span><span class='answer'>_</span></span><span class='space'></span><span class='letter-box'><span class='encoded'>K</span><span class='answer'>_</span></span><span class='space'></span><span class='letter-box'><span class='encoded'>P</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>N</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>J</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>S</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>G</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>K</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>Q</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>C</span><span class='answer'>_</span></span><span class='space'></span><span class='letter-box'><span class='encoded'>D</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>B</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>F</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>R</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>G</span><span class='answer'>_</span></span><span class='space'></span><span class='letter-box'><span class='encoded'>A</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>R</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>W</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>B</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>Q</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>G</span><span class='answer'>_</span></span><span class='space'></span><span class='letter-box'><span class='encoded'>Z</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>B</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>P</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>N</span><span class='answer'>_</span></span><span class='space'></span><span class='letter-box'><span class='encoded'>K</span><span class='answer'>_</span></span><span class='space'></span><span class='letter-box'><span class='encoded'>G</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>B</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>Q</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>W</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>F</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>R</span><span class='answer'>_</span></span><span class='space'></span><span class='letter-box'><span class='encoded'>G</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>P</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>R</span><span class='answer'>_</span></span><span class='letter-box'><span class='encoded'>Y</span><span class='answer'>_</span></span></div><div class='hint'><h3>Letter Frequency:</h3><p>R=6, G=5, P=4, Q=4, B=4, N=3, J=3, K=3, S=2, F=2, W=2, M=1, X=1, V=1, I=1, C=1, D=1, A=1, Z=1, Y=1</p></div></body></html>",
    "image": {
      "imageName": "0afa5de4-52fb-4902-8139-c177c08ac98b_puzzle.png",
      "format": ".png",
      "downloadURL": "https://storage.googleapis.com/apiverve/APIData/cryptogram/0afa5de4-52fb-4902-8139-c177c08ac98b_puzzle.png?GoogleAccessId=635500398038-compute%40developer.gserviceaccount.com&Expires=1766010132&Signature=guv7GNCup4lJXTI0iCF7Bo2Cz02Wl6h2HWC0YxJ0jtzb7w%2BlW80b1OzBlGR%2BneFxFdzQPwfIuMQlaHsW0KFqPh5ITsFkSt802OEUFyxuiDn71y4XkiJx8zVDhrxNH9R9i1befMM16c%2F4WQGpgzkaaXw8TJJUT2q2s8c8ESo41K85iYcHJZ%2BGUxXeMeFDJ%2FG38pq5txarX%2F0rnmdTk0Jk%2BhEox9PXFPCzaSvWbDFYDVABIt97N2NQyqlDPRcucrm5uuE5Jb9qjT80JqzlumfqiaR3DpgPDwZkWeVyuYW4b4TZCCbbEpK%2FIlRRUZTw9gYdxDpk0B35NKN9WKSCi%2BfFWQ%3D%3D",
      "expires": 1766010132300
    },
    "solutionImage": {
      "imageName": "41e6b5b7-d98c-4d4d-8b44-f56bdb5160b9_solution.png",
      "format": ".png",
      "downloadURL": "https://storage.googleapis.com/apiverve/APIData/cryptogram/41e6b5b7-d98c-4d4d-8b44-f56bdb5160b9_solution.png?GoogleAccessId=635500398038-compute%40developer.gserviceaccount.com&Expires=1766010132&Signature=YKDpJF9MYlmXjASdgVUgtPCq8%2Fp59Eci6DIAbXuHzv9B4rALSZwyq1sMj9KoIRhryYCdNW1KGBRpcgJFSFgaEGfcNC1MNsryoV%2F7bp3TSr1%2BknwqAGQu7sWvZrtozB2oJ3Wzaqz%2BGjm74rhrOaqAx0w7%2BmJtimslEHCl8emRuZxmAhW9l8Wi%2Fv%2BsCmb7%2Bl5hj0njHSs6AWo3YtoZpWoNv7F49g1dQczrfj%2BFYW7bOoFMfcmysTz%2ByNpXECZFbvWJ3A2f0fql7itGLGK%2B%2BNlI6Q6WkQ1ye3c7skHB3DqT%2BWHLbJCm0vjbIVhIgq3Vo39ZADdogcd7uiklvEBriMFkwA%3D%3D",
      "expires": 1766010132645
    }
  }
}

About the Cryptogram Generator API

Returns encoded text, cipher key, letter frequency analysis, and downloadable puzzle and solution images.

What people use it for

Puzzle Publishing
Create cryptogram puzzles for newspapers, magazines, and puzzle books
Educational Content
Teach cryptography and pattern recognition through interactive puzzles
Brain Training
Develop logical thinking and deductive reasoning exercises
Entertainment
Generate party games and group activities

Ways to call it

One endpoint, many ways in — REST with JSON, XML, YAML and CSV, plus GraphQL and an MCP interface for AI agents.

JSON
Default REST response
XML
Markup format
YAML
Human-readable
CSV
Tabular export
Beta
GraphQL
Query language
New
MCP
For AI agents
View all integrations →

Other ways to use Cryptogram Generator

Same data, same APIVerve account, same credit balance — one key works on all of them.

Give it to an AI agentConnect over MCP and your agent calls it as a native tool — Claude, Cursor, ChatGPT.on VerveKit

Questions.

Common questions about the Cryptogram Generator API.

Read the docs →
Can I use my own text or does it only generate random puzzles?
You can supply your own custom text up to 500 characters or set the random parameter to true to generate a puzzle from a famous quote. In both cases, the Cryptogram Generator creates a consistent substitution cipher across all letters in the passage.
Does the generator provide ready-to-print puzzle images?
Yes, on paid plans. When requested, the endpoint produces downloadable puzzle images and complete solution keys in standard formats like PNG or JPEG. The response provides signed download URLs, unique image filenames, and URL expiration timestamps.
Are the cipher key and downloadable images included on the Free plan?
No. The substitution cipher mapping, interactive HTML puzzle layout, and downloadable puzzle and solution images are premium features unlocked on any paid plan. The Free plan returns the encoded puzzle text, original text, and basic letter and word counts.
What happens if a phrase exceeds 500 characters?
The text parameter has a hard limit of 500 characters per call. If you have longer passages or full articles, split the text into segments under 500 characters before sending each request.
Which plan fits 25,000 generated puzzles a month?
The Starter plan handles this volume easily. At 2 credits per puzzle, 25,000 generations require 50,000 credits, using one-quarter of Starter's 200,000 monthly credits. That volume works out to about $0.30 per 1,000 puzzles, while the Free plan allows 100 calls per month.
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