Expiry
The Expiry API allows you to retrieve expiry dates for F&O (Futures and Options) instruments for a given underlying symbol. This API helps you get all available expiry dates for futures or options contracts of a specific underlying asset.
Endpoint
Local Host : POST http://127.0.0.1:5000/api/v1/expiry
Ngrok Domain : POST https://<your-ngrok-domain>.ngrok-free.app/api/v1/expiry
Custom Domain: POST https://<your-custom-domain>/api/v1/expiryRequest Format
Headers
Content-Type: application/json
Body Parameters
apikey
string
Yes
Your OpenAlgo API key for authentication
symbol
string
Yes
Underlying symbol (e.g., NIFTY, BANKNIFTY, RELIANCE)
exchange
string
Yes
Exchange code (NFO, BFO, MCX, CDS)
instrumenttype
string
Yes
Type of instrument - "futures" or "options"
Supported Exchanges and Instruments
NFO
✓
✓
NIFTY, BANKNIFTY, RELIANCE
BFO
✓
✓
SENSEX, BANKEX
MCX
✓
✓
GOLD, SILVER, CRUDEOIL
CDS
✓
✓
USDINR, EURINR
Request and Response Examples
NIFTY Futures (NFO)
Request:
{
"apikey": "openalgo-api-key",
"symbol": "NIFTY",
"exchange": "NFO",
"instrumenttype": "futures"
}Response:
{
"data": [
"31-JUL-25",
"28-AUG-25",
"25-SEP-25"
],
"message": "Found 3 expiry dates for NIFTY futures in NFO",
"status": "success"
}NIFTY Options (NFO)
Request:
{
"apikey": "openalgo-api-key",
"symbol": "NIFTY",
"exchange": "NFO",
"instrumenttype": "options"
}Response:
{
"data": [
"10-JUL-25",
"17-JUL-25",
"24-JUL-25",
"31-JUL-25",
"07-AUG-25",
"28-AUG-25",
"25-SEP-25",
"24-DEC-25",
"26-MAR-26",
"25-JUN-26",
"31-DEC-26",
"24-JUN-27",
"30-DEC-27",
"29-JUN-28",
"28-DEC-28",
"28-JUN-29",
"27-DEC-29",
"25-JUN-30"
],
"message": "Found 18 expiry dates for NIFTY options in NFO",
"status": "success"
}GOLD Futures (MCX)
Request:
{
"apikey": "openalgo-api-key",
"symbol": "GOLD",
"exchange": "MCX",
"instrumenttype": "futures"
}Response:
{
"data": [
"05-AUG-25",
"03-OCT-25",
"05-DEC-25",
"05-FEB-26",
"02-APR-26",
"05-JUN-26"
],
"message": "Found 6 expiry dates for GOLD futures in MCX",
"status": "success"
}USDINR Futures (CDS)
Request:
{
"apikey": "openalgo-api-key",
"symbol": "USDINR",
"exchange": "CDS",
"instrumenttype": "futures"
}Response:
{
"data": [
"11-JUL-25",
"18-JUL-25",
"25-JUL-25",
"29-JUL-25",
"01-AUG-25",
"08-AUG-25",
"14-AUG-25",
"22-AUG-25",
"26-AUG-25",
"29-AUG-25",
"04-SEP-25",
"12-SEP-25",
"19-SEP-25",
"26-SEP-25",
"29-OCT-25",
"26-NOV-25",
"29-DEC-25",
"28-JAN-26",
"25-FEB-26",
"27-MAR-26",
"28-APR-26",
"27-MAY-26",
"26-JUN-26"
],
"message": "Found 23 expiry dates for USDINR futures in CDS",
"status": "success"
}Error Response
{
"status": "error",
"message": "Invalid openalgo apikey"
}Response Fields
status
string
Response status: "success" or "error"
message
string
Descriptive message about the response
data
array
Array of expiry dates in DD-MMM-YY format, sorted chronologically
Error Codes
200
Success
Request processed successfully
400
Bad Request
Invalid request parameters
403
Forbidden
Invalid API key
500
Server Error
Internal server error
Error Messages
"Invalid openalgo apikey"
The provided API key is invalid
"Symbol parameter is required and cannot be empty"
Symbol field is missing or empty
"Exchange parameter is required and cannot be empty"
Exchange field is missing or empty
"Instrumenttype parameter is required and cannot be empty"
Instrumenttype field is missing or empty
"Instrumenttype must be either 'futures' or 'options'"
Invalid instrumenttype value
"Exchange must be one of: NFO, BFO, MCX, CDS"
Invalid exchange value
"No expiry dates found for [symbol] [instrumenttype] in [exchange]"
No matching expiry dates found
Notes
Expiry dates are returned in DD-MMM-YY format (e.g., "31-JUL-25")
Dates are sorted chronologically from earliest to latest
The API uses exact symbol matching to avoid confusion (e.g., "NIFTY" won't match "BANKNIFTY")
Different exchanges use different instrument type codes internally but the API accepts standardized "futures" and "options" parameters
Rate limiting is applied as per your OpenAlgo server configuration
Rate Limits
This API endpoint is subject to rate limiting. The default rate limit is 10 requests per second per API key, but this may vary based on your OpenAlgo server configuration.
Common Use Cases
Options Strategy Planning: Get all available expiry dates for options to plan multi-leg strategies
Futures Trading: Identify available futures contracts for different expiry months
Calendar Spreads: Find suitable expiry dates for calendar spread strategies
Integration Tips
Cache the expiry dates locally to reduce API calls
Filter expiry dates based on your trading strategy requirements
Consider time to expiry when selecting contracts
Use the chronologically sorted expiry dates for time-based analysis
Validate the symbol format according to OpenAlgo symbol conventions before making API calls
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