AI Text API

API Documentation

Base URL

https://ai-text.vercel.app

Authentication

X-API-Key: your_key (header) or ?key=your_key (query)Get your free key below

POST/api/text

Process text with AI. Supports summarize, rewrite, translate, keywords, sentiment, and fix actions.

Request Body (JSON)

FieldTypeRequiredDescription

textstringyesInput text (max 10,000 characters)

actionstringyessummarize, rewrite, translate, keywords, sentiment, fix

target_languagestringtranslateTarget language for translation

tonestringnoTone for rewrite (professional, casual, formal)

max_lengthnumbernoMax words for summarize. Default: 150

Response

{
  "action": "summarize",
  "result": "AI is transforming industries by automating tasks and enabling new capabilities across healthcare and finance."
}

Error Responses

// 400 — Bad Request
{ "error": "Missing 'text' field" }
{ "error": "Invalid action. Valid: summarize, rewrite, translate, keywords, sentiment, fix" }

// 401 — Unauthorized
{ "error": "Invalid API key" }

// 429 — Rate Limited
{ "error": "Daily limit reached. Upgrade your plan." }

// 502 — AI Error
{ "error": "AI service error: ..." }

Get API Key

Get a free API key for 6 requests/day. No credit card required.

Usage

Add header: X-API-Key: your_key
Or query param: ?key=your_key

Limits

Playground (no key): 3 req/day
Free tier (with key): 6 req/day
Paid plans: see pricing below

How It Works

Playground