Developer API Documentation

ApilageAI Developer API Documentation

Last updated: February 19, 2026

Official documentation for ApilageAI’s Sri Lanka focused developer API. Learn how to authenticate, stream responses, manage rate limits, and price tokens correctly with system text included.

Contents

Base URL: https://apilageai.lk

Use the developer portal at https://apilageai.lk/developers to create API keys, manage allowed domains, and monitor usage.

Overview

The ApilageAI Developer API delivers streaming and direct text responses optimized for Sri Lankan education workflows, multilingual support, and custom system instructions. Charges are calculated per 1M tokens and include system text.

Quickstart

JavaScript (Fetch)
  1. const API_KEY = "YOUR_API_KEY";
  2. const BASE_URL = "BASE_URL";
  4. const resp = await fetch(`${BASE_URL}/api/developer/text`, {
  5.   method: "POST",
  6.   headers: {
  7.     "Content-Type": "application/json",
  8.     "X-API-Key": API_KEY
  9.   },
  10.   body: JSON.stringify({
  11.     prompt: "Explain Newton\u2019s laws",
  12.     model: "pro",
  13.     system: "You are a tutor."
  14.   })
  15. });
  17. const data = await resp.json();
  18. console.log(data.text);

Authentication

  • Send your API key in the `X-API-Key` header.
  • API keys are limited to 10 per account.
  • Each key can whitelist up to 5 allowed domains.
  • Developer API requests require a positive ApilageAI balance.

Endpoints

POST /api/developer/text

Direct response endpoint.

  • Body: prompt, model, system (optional), temperature (optional), max_tokens (optional)
  • Response: text, usage (token + cost breakdown)

POST /api/developer/stream

Streaming SSE endpoint for real-time output.

Streaming (SSE)

Streaming responses are sent as Server-Sent Events. Each `data:` event contains a JSON payload with `delta`. A final `event: done` includes usage totals and cost. 

data: {"delta":"First chunk"}\n\n data: {"delta":"More text"}\n\n event: done data: {"usage":{"total_tokens":1234,"total_cost_lkr":12.34}}\n\n

Pricing (LKR per 1M tokens)

Model Input Output
free 1499.00 1299.00
pro 1999.00 1899.00
super 3599.00 3299.00
master 7999.00 7000.00
loard 10000.00 8999.00

System text tokens are included in input charges and are deducted from your ApilageAI balance.

Rate Limits

Model TPM RPD
free 1,000,000 1,500
pro 1,000,000 1,500
super 1,000,000 1,500
master 1,000,000 1,500
loard 700 1,000

Allowed Domains

Each API key can store up to 5 allowed domains (e.g., `example.com`, `app.example.com`, or `https://app.example.com`). Requests from other origins are blocked.

Errors

All errors return JSON in the format {"e":true,"m":"...","code":"..."}. Streaming errors are sent as event: error with the same payload.

  • 400 PROMPT_REQUIRED, PROMPT_TOO_LONG, SYSTEM_TOO_LONG.
  • 405 METHOD_NOT_ALLOWED.
  • 401 API_KEY_REQUIRED, INVALID_API_KEY.
  • 403 API_KEY_DISABLED, ORIGIN_NOT_ALLOWED, KEY_LEAK_DETECTED.
  • 402 INSUFFICIENT_BALANCE.
  • 429 TPM_LIMIT, RPD_LIMIT.
  • 500 GENERATION_FAILED.

Security & Leak Detection

ApilageAI automatically detects suspicious API key exposure (for example, public code repository leaks) and may disable the key to protect your balance. Always rotate keys if you suspect a leak.