Fill-in-the-Blanks Skill

Overview

Returns puzzles with answers, letter counts, and optional hints. Includes printable HTML for offline use.

The tool

Once your client is connected to the VerveKit server, this appears in its tool list as Fill-in-the-BlanksSkill. It is read-only and open-world — it fetches and never mutates anything on your side — so most clients call it without asking you to confirm.

Tool call

{
  "name": "Fill-in-the-BlanksSkill",
  "arguments": {}
}

Connecting

One server URL covers every skill in the catalog, including this one. Authorization is OAuth: the client opens a browser once, and there is no key to paste into a config file.

{
  "mcpServers": {
    "vervekit": {
      "url": "https://api.vervekit.com/v1/mcp"
    }
  }
}

Per-client setup — Claude, Cursor, VS Code, ChatGPT — is on the MCP setup page.

Arguments

These are the properties on the tool's inputSchema, so a well-behaved client validates them before the call is made. Premium arguments are accepted on every plan but only take effect on plans that include them.

Argument	Type	Description
`category`Optional	string	Puzzle category `randomidiomsproverbsquotessciencegeography` default random
`count`Optional	integer	Number of puzzles default 5 · range 1–20
`difficulty`Optional	string	Difficulty level `easymediumhard` default medium
`image`OptionalPremium	boolean	Set to true to generate a downloadable puzzle image

What the model gets back

The result carries a structuredContent object matching the tool's declared outputSchema, so a client reads fields without parsing prose. status is "ok" and error is null on success; a null field means the value was not available for that input, not that the call failed.

Result

{
  "status": "ok",
  "error": null,
  "data": {
    "puzzles": [
      {
        "id": 1,
        "sentence": "A penny saved is a penny ___.",
        "answer": "EARNED",
        "letterCount": 6,
        "hint": "gained/obtained",
        "firstLetter": null
      },
      {
        "id": 2,
        "sentence": "Actions speak louder than ___.",
        "answer": "WORDS",
        "letterCount": 5,
        "hint": "what we say",
        "firstLetter": null
      },
      {
        "id": 3,
        "sentence": "Don't count your chickens before they ___.",
        "answer": "HATCH",
        "letterCount": 5,
        "hint": "come out of eggs",
        "firstLetter": null
      },
      {
        "id": 4,
        "sentence": "The early bird catches the ___.",
        "answer": "WORM",
        "letterCount": 4,
        "hint": "a crawling creature",
        "firstLetter": null
      },
      {
        "id": 5,
        "sentence": "Don't put all your eggs in one ___.",
        "answer": "BASKET",
        "letterCount": 6,
        "hint": "a container",
        "firstLetter": null
      }
    ],
    "count": 5,
    "difficulty": "medium",
    "category": "idioms",
    "html": "<html><head><title>Fill in the Blanks</title><style>body {font-family: Arial, sans-serif; padding: 20px; max-width: 700px; margin: 0 auto;}h1 {text-align: center; color: #673AB7;}.puzzle {background: #f5f5f5; padding: 20px; margin: 15px 0; border-radius: 10px;}.number {font-weight: bold; color: #673AB7; margin-bottom: 10px;}.sentence {font-size: 18px; line-height: 1.8;}.blank {display: inline-block; min-width: 100px; border-bottom: 2px solid #673AB7; margin: 0 5px;}.hint {font-size: 13px; color: #888; font-style: italic; margin-top: 10px;}.info {font-size: 12px; color: #999; margin-top: 5px;}</style></head><body><h1>Fill in the Blanks</h1><div class='puzzle'><div class='number'>#1</div><div class='sentence'>A penny saved is a penny <span class='blank'></span>.</div><div class='info'>6 letters</div><div class='hint'>Hint: gained/obtained</div></div><div class='puzzle'><div class='number'>#2</div><div class='sentence'>Actions speak louder than <span class='blank'></span>.</div><div class='info'>5 letters</div><div class='hint'>Hint: what we say</div></div><div class='puzzle'><div class='number'>#3</div><div class='sentence'>Don't count your chickens before they <span class='blank'></span>.</div><div class='info'>5 letters</div><div class='hint'>Hint: come out of eggs</div></div><div class='puzzle'><div class='number'>#4</div><div class='sentence'>The early bird catches the <span class='blank'></span>.</div><div class='info'>4 letters</div><div class='hint'>Hint: a crawling creature</div></div><div class='puzzle'><div class='number'>#5</div><div class='sentence'>Don't put all your eggs in one <span class='blank'></span>.</div><div class='info'>6 letters</div><div class='hint'>Hint: a container</div></div></body></html>",
    "image": {
      "imageName": "ba85c6d6-4376-4171-841d-8b4bc97e1095_fillblanks.png",
      "format": ".png",
      "downloadURL": "https://storage.googleapis.com/apiverve/APIData/fillintheblanks/ba85c6d6-4376-4171-841d-8b4bc97e1095_fillblanks.png?GoogleAccessId=635500398038-compute%40developer.gserviceaccount.com&Expires=1766010206&Signature=YRHfh28GKDNvEM4Q07qRcNyg3WnPs7Ee7yg0xXKxKRTmT%2Bg3x%2FThpfWsFTeYScpZlgQTVQ3SU1tZMGH74sZJvAHdVkG6IGA9V2lwIfhHzcfu4Uf4VGKL8%2FIa%2FaLupdtrgDqXSFWOJ9EHHeMKnImAhli1qhlMu%2BIuWAiqfPitDlN5pMklv4R5FACKkZld4LXyA82%2BX8bt%2FESyHciZ5jzlqY1JTacL4kW5uK09bpoo9Ytvs8XOOOjB0my1s%2BIq5z0JEwZzw1Jag%2F5vd09wTXzSXeQMzfo%2FDj73kpU7SilAxEGh%2BuflilyDQTXK7krXcdFUGcD5Nd4Wm%2BW7dP8tQKmbAA%3D%3D",
      "expires": 1766010206793
    }
  }
}

Response fields

Paths are relative to data. Premium fields are absent rather than zeroed on plans that do not include them, so check for presence instead of comparing to 0.

Field	Type	Example	Description
`puzzles`	array[5]		Array of fill-in-the-blanks puzzle objects
`puzzles.0.id`	number	`1`	Unique identifier for the puzzle
`puzzles.0.sentence`	string	`A penny saved is a penny ___.`	Full sentence with blank to be filled in
`puzzles.0.answer`	string	`EARNED`	Correct answer word to fill the blank
`puzzles.0.letterCount`	number	`6`	Number of letters in the answer
`puzzles.0.hint`	string	`gained/obtained`	Helpful hint describing the answer
`puzzles.0.firstLetter`	object	`null`	First letter of answer or null if not provided
`count`	number	`5`	Total number of puzzles generated
`difficulty`	string	`medium`	Difficulty level of the puzzles
`category`	string	`idioms`	Category of the puzzles
`html`Premium	string	<html><head><title>Fill in the Blanks</title><style>body {font-family: Arial, sans-serif; padding: 20px; max-width: 700px; margin: 0 auto;}h1 {text-align: center; color: #673AB7;}.puzzle {background: #f5f5f5; padding: 20px; margin: 15px 0; border-radius: 10px;}.number {font-weight: bold; color: #673AB7; margin-bottom: 10px;}.sentence {font-size: 18px; line-height: 1.8;}.blank {display: inline-block; min-width: 100px; border-bottom: 2px solid #673AB7; margin: 0 5px;}.hint {font-size: 13px; color: #888; font-style: italic; margin-top: 10px;}.info {font-size: 12px; color: #999; margin-top: 5px;}</style></head><body><h1>Fill in the Blanks</h1><div class='puzzle'><div class='number'>#1</div><div class='sentence'>A penny saved is a penny <span class='blank'></span>.</div><div class='info'>6 letters</div><div class='hint'>Hint: gained/obtained</div></div><div class='puzzle'><div class='number'>#2</div><div class='sentence'>Actions speak louder than <span class='blank'></span>.</div><div class='info'>5 letters</div><div class='hint'>Hint: what we say</div></div><div class='puzzle'><div class='number'>#3</div><div class='sentence'>Don't count your chickens before they <span class='blank'></span>.</div><div class='info'>5 letters</div><div class='hint'>Hint: come out of eggs</div></div><div class='puzzle'><div class='number'>#4</div><div class='sentence'>The early bird catches the <span class='blank'></span>.</div><div class='info'>4 letters</div><div class='hint'>Hint: a crawling creature</div></div><div class='puzzle'><div class='number'>#5</div><div class='sentence'>Don't put all your eggs in one <span class='blank'></span>.</div><div class='info'>6 letters</div><div class='hint'>Hint: a container</div></div></body></html>	Printable HTML rendering of all puzzles
`image`Premium	object	`{…}`	Generated puzzle image details and download information
`image.imageName`Premium	string	`ba85c6d6-4376-4171-841d-8b4bc97e1095_fillblanks.png`	Unique filename of generated puzzle image
`image.format`Premium	string	`.png`	Image file format (.png, .jpg, etc)
`image.downloadURL`Premium	string	https://storage.googleapis.com/apiverve/APIData/fillintheblanks/ba85c6d6-4376-4171-841d-8b4bc97e1095_fillblanks.png?GoogleAccessId=635500398038-compute%40developer.gserviceaccount.com&Expires=1766010206&Signature=YRHfh28GKDNvEM4Q07qRcNyg3WnPs7Ee7yg0xXKxKRTmT%2Bg3x%2FThpfWsFTeYScpZlgQTVQ3SU1tZMGH74sZJvAHdVkG6IGA9V2lwIfhHzcfu4Uf4VGKL8%2FIa%2FaLupdtrgDqXSFWOJ9EHHeMKnImAhli1qhlMu%2BIuWAiqfPitDlN5pMklv4R5FACKkZld4LXyA82%2BX8bt%2FESyHciZ5jzlqY1JTacL4kW5uK09bpoo9Ytvs8XOOOjB0my1s%2BIq5z0JEwZzw1Jag%2F5vd09wTXzSXeQMzfo%2FDj73kpU7SilAxEGh%2BuflilyDQTXK7krXcdFUGcD5Nd4Wm%2BW7dP8tQKmbAA%3D%3D	Temporary download URL for puzzle image
`image.expires`Premium	number	`1766010206793`	Timestamp when download URL expires

Failure modes

Errors come back as tool errors carrying a sentence the model can act on, not a bare status code. Error handling covers the full list.

Status	What it means
`400` / `422`	The arguments did not validate. The message names the offending one.
`401`	The OAuth session is invalid or expired — reconnect the server.
`403`	Blocked by a key restriction or an IP allow-list. Never a bad identity.
`404`	This skill is not part of VerveKit. Check the catalog.
`429`	Out of credits, or a brief rate limit. The message tells them apart.

A call costs 2 credits each time the tool actually runs; a model that reasons about the tool without calling it costs nothing.

Use cases

Education: Create vocabulary and comprehension tests
Language Learning: Build idiom and proverb exercises
Trivia Games: Generate knowledge-testing puzzles
Worksheets: Produce printable educational materials

Other ways to use Fill-in-the-Blanks Skill

Set up Fill-in-the-Blanks Skill on VerveKit, or reach the same source a different way. Your VerveKit account and credits work on all of them — one key, one balance.

Call it as a REST APIOne HTTPS endpoint and an x-api-key header, with SDKs for Node, Python and .NET.APIVerve →Reference →