Spell Checker Skill

Overview

A spell check API you can call to check spelling and correct text: send English text and get back whether it passes, how many distinct misspellings were found, and suggested corrections for each misspelled word. Turn on autocorrect to get correctedText, the text with each misspelling replaced by its first suggestion. Paid plans add total and per-word occurrence counts, and offsets to get the start and end position of every occurrence for highlighting in an editor. Spell Checker works by checking each word of the text against an English dictionary and suggesting likely replacements for the ones it does not recognise.

Live Test Spell Checker Skill Skill →

The tool

Once your client is connected to the VerveKit server, this appears in its tool list as SpellCheckerSkill. 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.

{
  "name": "SpellCheckerSkill",
  "arguments": {
    "text": "The quick brown fox jumps over the lazy dog"
  }
}

You do not name the tool yourself; the model picks it. Asking about The quick brown fox jumps over the lazy dog in the terms this skill covers is enough for it to reach for SpellCheckerSkill 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"
    }
  }
}

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.

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.

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{
  "status": "ok",
  "error": null,
  "data": {
    "spellPass": false,
    "mispellingsFound": 2,
    "totalOccurrences": 2,
    "corrections": [
      {
        "word": "neeed",
        "suggestions": [
          "needed",
          "need",
          "needy",
          "Neel",
          "needs"
        ],
        "occurrences": 1,
        "offsets": [
          {
            "start": 2,
            "end": 7
          }
        ]
      },
      {
        "word": "telephine",
        "suggestions": [
          "telephone",
          "telephoned",
          "telephoner",
          "telephones",
          "telephony"
        ],
        "occurrences": 1,
        "offsets": [
          {
            "start": 29,
            "end": 38
          }
        ]
      }
    ],
    "correctedText": "I needed to call my friend on telephone today!"
  }
}

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.

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.

A call costs 10 credits each time the tool actually runs; a model that reasons about the tool without calling it costs nothing.

Use cases

Rich Text Editors

Flag typos in user-submitted drafts in real time and display replacement suggestions directly inside the editing interface.

Customer Support Chat

Before sending agent replies to customers, scan message drafts to detect misspelled words and prevent communication errors.

Form Submission Sanitization

Job boards inspect candidate resumes and cover letters upon upload to tally spelling mistakes before forwarding applications to recruiters.

Student Essay Assessment

To automate rubric scoring, learning platforms scan student papers to count uncorrected typos and show teachers the identified errors.

Other ways to use Spell Checker Skill

Set up Spell 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.

Related

More in Text Processing: