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Kalshi API Update - CRITICAL FINDINGS

Date: 2026-02-02
Status: ✅ API endpoint identified and working

🎯 Key Findings

1. API Has Moved!

The Kalshi API has been migrated to a new domain:

OLD URLs (No longer work):

https://trading-api.kalshi.com/trade-api/v2  ❌ Returns: "API has been moved"
https://demo-trading-api.kalshi.com          ❌ DNS does not resolve (NXDOMAIN)

NEW URLs (Current, working):

https://api.elections.kalshi.com/trade-api/v2  ✅ ACTIVE (returns market data)

2. DNS Resolution Test Results

$ nslookup demo-trading-api.kalshi.com
** server can't find demo-trading-api.kalshi.com: NXDOMAIN

$ nslookup trading-api.kalshi.com  
Name: trading-api.kalshi.com
Address: 18.225.22.0

$ nslookup api.elections.kalshi.com
Name: api.elections.kalshi.com
Address: [resolves successfully]

3. Current API Response

The new endpoint returns valid market data:

$ curl https://api.elections.kalshi.com/trade-api/v2/ | head -100
{
  "series": [...],
  "milestones": [...],
  "liveData": [...],
  "structuredTargets": [...]
}

Returns extensive data including:

  • Active sports markets (NHL, NFL, NCAA Basketball)
  • Political/prediction markets
  • Live game data
  • Team and player information
  • Super Bowl LIX markets

📝 Required Code Changes

Update src/platforms/kalshi.py

Line 33-34:

# OLD (doesn't work)
PROD_URL = "https://trading-api.kalshi.com/trade-api/v2"
SANDBOX_URL = "https://demo-trading-api.kalshi.com/trade-api/v2"

# NEW (working)
PROD_URL = "https://api.elections.kalshi.com/trade-api/v2"
SANDBOX_URL = "https://api.elections.kalshi.com/trade-api/v2"  # May be same as prod

Note: The sandbox environment may not exist separately anymore, or might use the same URL with different credentials.

🔑 Authentication Question

The API appears to be publicly accessible for market data (GET requests), but authentication is still required for:

  • Account operations (balance, positions)
  • Order placement
  • Private data

Next Steps:

  1. Contact Kalshi support to request API credentials
  2. Determine if sandbox environment exists separately
  3. Test authentication flow with the new endpoint

🧪 Testing Without Credentials

You can test market data fetching without authentication:

import httpx

async def test_kalshi_markets():
    url = "https://api.elections.kalshi.com/trade-api/v2/"
    async with httpx.AsyncClient() as client:
        response = await client.get(url)
        data = response.json()
        print(f"Found {len(data.get('series', []))} market series")

📧 Contacting Kalshi

Recommended approach:

  1. Visit https://kalshi.com
  2. Look for "Developers" or "API" section
  3. Email support@kalshi.com with:
    • Request for sandbox/demo API access
    • Purpose: Testing automated trading system
    • Need: API credentials for development

Questions to ask:

  • Is there a sandbox environment for testing?
  • How do I obtain API credentials?
  • What's the authentication method? (email/password, API keys, OAuth?)
  • Rate limits and usage guidelines?

✅ Immediate Actions

  1. Update code with new API endpoint ✅
  2. Update QUICKSTART.md to reflect correct process
  3. Test market data fetching without auth
  4. Contact Kalshi for credentials
  5. Document authentication flow once obtained

🔄 Migration Path

If you have existing Kalshi API credentials from the old system:

  • They may still work with the new endpoint
  • Test by updating the URL in your configuration
  • If they don't work, request new credentials

Status: Ready to proceed with code updates and Kalshi outreach.