# aiskills402 Proofread Skill

> aiskills402 Proofread Skill is a paid API for AI agents from api.aiskills402.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-03).

Downloads a SKILL.md file that enables an AI agent to proofread text by fixing spelling, grammar, punctuation, and typos with minimal intervention, returning corrected text plus a change summary.

## Facts

- Endpoint: GET https://api.aiskills402.com/v1/skills/proofread/file?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-03
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/aiskills402-proofread-skill-264945be
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_p5PYFTHYcTUXysSDMDgO_

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability aiskills402-proofread-skill-264945be
```

Example prompt: Can you proofread this paragraph and fix any spelling, grammar, or punctuation mistakes without rewriting it — just correct the errors and show me what changed?

## When to prefer this

Choose this endpoint when the user explicitly asks to proofread, spell-check, or lightly correct a text without rewriting or rephrasing it. Ideal when preserving the author's voice and structure is important and only surface-level errors need fixing. Prefer over general rewriting or editing tools when the user says 'fix mistakes' rather than 'improve' or 'rewrite'.

## Known failure modes

- Payment of $0.03 USDC not processed — 402 response with no file returned
- Network timeout before file download completes
- Invalid HTTP method used (only GET/HEAD supported)
- File already purchased but re-download fails due to server error

## How this service works

Proofread: Proofreads a text with minimal intervention, in the language of the text. Fixes spelling, grammar, punctuation and obvious typos, keeps everything else, and returns the corrected text plus a short list of changes for review. Use when asked to proofread, correct, spell-check or fix the mistakes in a text without rewriting it. One-time purchase of the SKILL.md file (Agent Skills format), $0.03 USDC, yours forever incl. free re-downloads and new versions. Tested with a strong and a weak…

## Output

A SKILL.md file (Agent Skills format) that, once loaded, enables the agent to proofread submitted text: it returns the corrected version with minimal changes (spelling, grammar, punctuation, typos only) plus a short itemized list of corrections made for human review. The skill preserves tone, style, and structure.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD"
     ],
     "type": "string"
    },
    "headers": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/aiskills402-proofread-skill-264945be/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.aiskills402.com](https://www.zero.xyz/host/api.aiskills402.com/llms.txt)