CSE Unofficial API

Comprehensive documentation for the unofficial Colombo Stock Exchange (CSE) API. Build powerful financial applications using real-time market data from Sri Lanka's primary stock exchange.

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Unofficial Documentation: This project is a third-party effort and is not affiliated with the Colombo Stock Exchange. Use these endpoints responsibly for educational and research purposes. Do not use for high-frequency trading or extensive commercial applications without permission.

Base URL

https://www.cse.lk/api/

About CSE

The Colombo Stock Exchange (CSE) is the nucleus of Sri Lanka's capital market. Established in 1985 (replacing the Share Brokers Association), it operates as a company limited by guarantee and is regulated by the Securities and Exchange Commission of Sri Lanka (SEC).

As of late 2025, the CSE lists over 286 companies representing 20 GICS industry groups, with a market capitalization exceeding Rs. 8 Trillion. It is a full member of the World Federation of Exchanges (WFE).

Market Hours

Pre-open Session 09:00 - 09:30 AM
Open Auction 09:30 AM
Regular Trading 09:30 - 02:30 PM
Time Zone GMT+5:30 (SLT)

Key Indices

ASPI Primary
All Share Price Index. measures price movements of all listed companies. Base: 1985.
S&P SL20 Blue Chip
Tracks the 20 largest and most liquid stocks, developed with S&P Dow Jones Indices.

Infrastructure

Trading System Electronic (ATS)
Settlement T+3 Cycle
Depository CDS (Central Depository)

Authentication & Headers

Accessing the API does not currently require an API key. However, the server expects requests to mimic a standard browser session. Always include the following headers:

Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 ... (Standard Browser UA)
Origin: https://www.cse.lk
Referer: https://www.cse.lk/

Market Summary

POST /marketSummery

Retrieve high-level market statistics for the current trading day.

No Parameters

Response Example

{
  "tradeVolume": 3263762020.0,
  "shareVolume": 115084307,
  "turnover": 1.25E9,
  "topSector": "Capital Goods"
}

Daily Market Summary

POST /dailyMarketSummery

Detailed breakdown of daily market performance, including foreign/domestic splits and market capitalization.

[
  [
    {
      "id": 22240,
      "marketTurnover": 3.26E9,
      "marketCap": 6.94E12,
      "marketDomestic": 30003.0,
      "marketForeign": 271.0
    }
  ]
]

Market Status

POST /marketStatus

Check the current operational status of the market.

{ "status": "Market Closed" }

ASPI Data

POST /aspiData

Real-time data for the All Share Price Index.

{ "value": 19826.57, "change": 21.77, "percentageChange": 0.11 }

S&P SL20 Data

POST /snpData

Real-time data for the S&P SL20 Index.

{ "value": 5825.39, "change": -2.46 }

Sector Indices

POST /allSectors

[
  { "symbol": "EGY", "indexName": "Energy", "change": 1.2 },
  { "symbol": "BNK", "indexName": "Banks", "change": -0.5 }
]

Company Info Summary

POST /companyInfoSummery

Parameter	Description
symbol string	The stock symbol (e.g., `LOLC.N0000`).

{
  "reqLogo": { "path": "upload_logo/..." },
  "reqSymbolInfo": {
    "symbol": "LOLC.N0000",
    "name": "L O L C HOLDINGS PLC",
    "lastTradedPrice": 450.25
  }
}

Trade Summary

POST /tradeSummary

Summary of recent trades for available securities.

{"reqTradeSummery": [{"symbol": "ABAN.N0000", "price": 579.75}]

Detailed Trades

POST /detailedTrades

Parameter	Description
symbol string (optional)	Filter by stock symbol.

{
  "reqDetailTrades": [
    {
      "symbol": "ABAN.N0000",
      "price": 585.0,
      "qty": 562,
      "time": "10:45:22"
    }
  ]
}

Chart Data

POST /chartData

Parameter	Description
symbol string	Stock symbol.

{"reqTradeSummery": {'chartData': [{'h': 562.0, 'l': 550.0, 'c': 560.0, ...}]}

Today's Share Price

POST /todaySharePrice

[{"symbol": "ABAN.N0000", "lastTradedPrice": 579.75}]

Top Gainers

POST /topGainers

[{"symbol": "HEXP.N0000", "changePercentage": 15.86}]

Top Losers

POST /topLooses

[{"symbol": "TESS.X0000", "changePercentage": -10.0}]

Most Active

POST /mostActiveTrades

[{"symbol": "KZOO.N0000", "tradeVolume": 1102.0}]

Announcements

Collection of endpoints related to company announcements.

Announcements

/getNewListingsRelatedNoticesAnnouncements - IPOs and new listings
/getBuyInBoardAnnouncements - Failed settlements
/approvedAnnouncement - Regulatory approvals
/getFinancialAnnouncement - Quarterly earnings
/circularAnnouncement - Official circulars
/directiveAnnouncement - SEC directives