Grammar Check Skill

Overview

Pass any raw string in the request body to scan it for grammatical issues and misspelled words. The response states whether modifications were needed, counts the total issues found, and provides the fully revised text. Subscribers on paid plans also receive character offsets, violated rules, and specific replacement suggestions for each error.

Live Test Grammar Check Skill Skill →

The tool

Once your client is connected to the VerveKit server, this appears in its tool list as GrammarCheckSkill. 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": "GrammarCheckSkill",
  "arguments": {
    "text": "This is a sample text with a grammatical error."
  }
}

You do not name the tool yourself; the model picks it. Asking about This is a sample text with a grammatical error. in the terms this skill covers is enough for it to reach for GrammarCheckSkill 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.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44

{
  "status": "ok",
  "error": null,
  "data": {
    "modified": true,
    "corrected": "The pig snorted when I saw it on the barn gate. I was a little mad because it woke up my puppy",
    "errorCount": 3,
    "corrections": [
      {
        "rule": "repeated_word",
        "message": "Did you mean to repeat the word \"The\"?",
        "position": {
          "start": 0,
          "end": 7
        },
        "suggestions": [
          "The"
        ]
      },
      {
        "rule": "spelling",
        "message": "Did you mean \"because\"?",
        "position": {
          "start": 67,
          "end": 74
        },
        "suggestions": [
          "because"
        ]
      },
      {
        "rule": "spelling",
        "message": "Did you mean \"puppy\"?",
        "position": {
          "start": 92,
          "end": 101
        },
        "suggestions": [
          "puppy"
        ]
      }
    ]
  }
}

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

Use cases

Content Management Proofing

Flag grammar mistakes in submitted blog drafts and substitute corrected sentences before publishing articles to readers.

Customer Support Messaging

When agents write replies in ticketing desks, the system uses the error count to warn them of uncorrected typos.

Resume Intake Screening

Job portals scan cover letters during applicant uploads, noting whether the text was modified to preserve clean candidate profiles.

Student Essay Feedback

Learning management platforms pass student submissions to display the number of errors and return properly formatted text.

Other ways to use Grammar Check Skill

Set up Grammar Check 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: