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Fix Gamma API validation error and test alternative parameters #20

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Fix Gamma API validation error and test alternative parameters #20

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85 changes: 70 additions & 15 deletions src/polymarket_mcp/server.py
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Original file line number Diff line number Diff line change
Expand Up @@ -121,12 +121,6 @@ async def handle_list_tools() -> list[types.Tool]:
"description": "Number of markets to skip (for pagination)",
"default": 0,
"minimum": 0
},
"order": {
"type": "string",
"description": "Sort order",
"enum": ["asc", "desc"],
"default": "desc"
}
},
},
Expand Down Expand Up @@ -406,10 +400,11 @@ async def fetch_gamma_market(market_id: str) -> dict:
return {}

async def test_gamma_api_connectivity():
"""Test if Gamma API is reachable"""
"""Test if Gamma API is reachable and find working parameters"""
print("[DEBUG] Testing Gamma API connectivity...", file=sys.stderr)
async with httpx.AsyncClient(timeout=5.0) as client:
try:
# Test 1: Basic connectivity
response = await client.get(f"{GAMMA_API_URL}/markets?limit=1")
if response.status_code == 200:
print(f"[DEBUG] ✅ Gamma API is reachable! Status: {response.status_code}", file=sys.stderr)
Expand All @@ -421,8 +416,39 @@ async def test_gamma_api_connectivity():
print(f"[DEBUG] Title: {data[0].get('title', data[0].get('question', 'N/A'))}", file=sys.stderr)
print(f"[DEBUG] Active: {data[0].get('active', 'N/A')}", file=sys.stderr)
print(f"[DEBUG] Archived: {data[0].get('archived', 'N/A')}", file=sys.stderr)
except:
print(f"[DEBUG] ⚠️ API reachable but response format unexpected", file=sys.stderr)
print(f"[DEBUG] End Date: {data[0].get('endDate', 'N/A')}", file=sys.stderr)

# Test 2: Check if archived parameter works
print(f"[DEBUG] Testing archived=false parameter...", file=sys.stderr)
resp2 = await client.get(f"{GAMMA_API_URL}/markets?limit=1&archived=false")
if resp2.status_code == 200:
data2 = resp2.json()
if data2 and len(data2) > 0:
end_date = data2[0].get('endDate', '')
if '2020' in str(end_date) or '2021' in str(end_date):
print(f"[DEBUG] ⚠️ archived=false still returns old markets!", file=sys.stderr)
else:
print(f"[DEBUG] ✅ archived=false works correctly", file=sys.stderr)

# Test 3: Try other parameters
print(f"[DEBUG] Testing other parameter combinations...", file=sys.stderr)
test_params = [
{"limit": 1, "live": True},
{"limit": 1, "status": "active"},
{"limit": 1, "resolved": False},
{"limit": 1, "enable_order_book": True}
]
for params in test_params:
resp = await client.get(f"{GAMMA_API_URL}/markets", params=params)
if resp.status_code == 200:
test_data = resp.json()
if test_data and len(test_data) > 0:
test_end_date = test_data[0].get('endDate', '')
if '2025' in str(test_end_date) or '2024' in str(test_end_date):
print(f"[DEBUG] ✅ Found current markets with params: {params}", file=sys.stderr)
break
except Exception as e:
print(f"[DEBUG] ⚠️ API reachable but response format unexpected: {str(e)}", file=sys.stderr)
else:
print(f"[DEBUG] ❌ Gamma API returned error status: {response.status_code}", file=sys.stderr)
except httpx.ConnectError as e:
Expand Down Expand Up @@ -486,22 +512,51 @@ async def execute_tool():
params["limit"] = arguments.get("limit", 10)
params["offset"] = arguments.get("offset", 0)

# Handle sorting
params["order"] = arguments.get("order", "desc")
# Don't include order parameter - it causes validation errors
# params["order"] = arguments.get("order", "desc")

print(f"[DEBUG] Attempting to fetch from Gamma API...", file=sys.stderr)
markets_data = await fetch_gamma_markets(params)

if not markets_data:
# Try with minimal parameters if full params fail
print(f"[DEBUG] First attempt failed, trying minimal params", file=sys.stderr)
minimal_params = {
# Try different parameter combinations
print(f"[DEBUG] First attempt failed, trying without archived param", file=sys.stderr)
alt_params = {
"active": True,
"archived": False,
"limit": params["limit"]
}
markets_data = await fetch_gamma_markets(alt_params)

if not markets_data:
# Try with just limit
print(f"[DEBUG] Second attempt failed, trying with just limit", file=sys.stderr)
minimal_params = {
"limit": params["limit"]
}
markets_data = await fetch_gamma_markets(minimal_params)

# Check if we got old data despite archived=false
if markets_data and isinstance(markets_data, list) and len(markets_data) > 0:
first_market = markets_data[0]
end_date = first_market.get('endDate', first_market.get('end_date_iso', ''))
if '2020' in str(end_date) or '2021' in str(end_date):
print(f"[DEBUG] ⚠️ WARNING: API returned old markets despite archived=false!", file=sys.stderr)
print(f"[DEBUG] Sample market end date: {end_date}", file=sys.stderr)

# Try to find if there's a different parameter for filtering old markets
print(f"[DEBUG] Trying with 'live' parameter instead", file=sys.stderr)
live_params = {
"live": True,
"limit": params["limit"]
}
new_markets = await fetch_gamma_markets(live_params)
if new_markets and isinstance(new_markets, list) and len(new_markets) > 0:
first_new = new_markets[0]
new_end_date = first_new.get('endDate', first_new.get('end_date_iso', ''))
if '2025' in str(new_end_date) or '2024' in str(new_end_date):
print(f"[DEBUG] ✅ Found current markets with 'live' parameter!", file=sys.stderr)
markets_data = new_markets

if not markets_data:
print(f"[DEBUG] Gamma API failed, falling back to CLOB client", file=sys.stderr)
print(f"[DEBUG] ⚠️ WARNING: CLOB client may return outdated markets!", file=sys.stderr)
Expand Down