Palindrome Checker Skill

Overview

Palindrome Checker works by cleaning and normalizing text according to specified options, then comparing it with its reverse. Also finds the longest palindromic substring using efficient algorithms for additional text analysis.

Live Test Palindrome Checker Skill Skill →

The tool

Once your client is connected to the VerveKit server, this appears in its tool list as PalindromeCheckerSkill. 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": "PalindromeCheckerSkill",
  "arguments": {
    "text": "A man a plan a canal Panama"
  }
}

You do not name the tool yourself; the model picks it. Asking about A man a plan a canal Panama in the terms this skill covers is enough for it to reach for PalindromeCheckerSkill on its own — naming it explicitly also works, and is the way to force the call.

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
`text`Required	string	The text to check for palindrome. Maximum 20000 characters length 0–20000
`ignorecase`Optional	boolean	Ignore case when checking (default: true) default true
`ignorespaces`Optional	boolean	Ignore spaces when checking (default: true) default true
`ignorepunctuation`Optional	boolean	Ignore punctuation when checking (default: true) default true

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": {
    "text": "A man a plan a canal Panama",
    "is_palindrome": true,
    "cleaned_text": "amanaplanacanalpanama",
    "reversed_text": "amanaplanacanalpanama",
    "length": 21,
    "options": {
      "ignore_case": true,
      "ignore_spaces": true,
      "ignore_punctuation": true
    },
    "longest_palindrome_substring": "amanaplanacanalpanama",
    "longest_palindrome_length": 21
  }
}

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
`text`	string	`A man a plan a canal Panama`	The text that was checked
`is_palindrome`	boolean	`true`	Whether the text is a valid palindrome
`cleaned_text`	string	`amanaplanacanalpanama`	Text after applying normalization options
`reversed_text`	string	`amanaplanacanalpanama`	The normalised text reversed, which is what the comparison is made against
`length`	number	`21`	Length of the text that was checked
`options`	object	`{…}`	Which normalisations were applied before comparing
`options.ignore_case`	boolean	`true`	Whether capitalisation was ignored
`options.ignore_spaces`	boolean	`true`	Whether spaces were ignored
`options.ignore_punctuation`	boolean	`true`	Whether punctuation was ignored
`longest_palindrome_substring`Premium	string	`amanaplanacanalpanama`	Longest palindromic substring found
`longest_palindrome_length`	number	`21`	Length of longest_palindrome_substring, measured on the cleaned text.

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

Word Games: Validate palindromes in word puzzles, games, and educational applications
Text Analysis: Analyze text patterns and linguistic properties in natural language processing
Input Validation: Check usernames, passwords, or text inputs for palindromic patterns
Educational Tools: Create interactive learning tools for teaching palindromes and text patterns

Other ways to use Palindrome Checker Skill

Set up Palindrome Checker 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 →

Google Sheets or ExcelA =VERVE() formula fills a column — no script, no export, recalculates in place.VerveSheets →Reference →