diff --git a/pyproject.toml b/pyproject.toml
index 7fa4b64..0057972 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,7 @@ target-version = "py313"
 
 [tool.ruff.lint]
 select = ["E", "F", "I", "W", "UP", "B", "SIM"]
-ignore = ["E501"]
+ignore = ["E501", "E741"]
 
 [tool.ruff.lint.flake8-bugbear]
 extend-immutable-calls = [
diff --git a/services/common/src/mcp_common/mcp_bridge.py b/services/common/src/mcp_common/mcp_bridge.py
index 55c66d7..5cec928 100644
--- a/services/common/src/mcp_common/mcp_bridge.py
+++ b/services/common/src/mcp_common/mcp_bridge.py
@@ -21,6 +21,7 @@ Claude Code config esempio:
 """
 from __future__ import annotations
 
+import contextlib
 from typing import Any
 
 import httpx
@@ -63,10 +64,8 @@ def _derive_input_schemas(app: FastAPI, tool_names: list[str]) -> dict[str, dict
             if pname == "return":
                 continue
             if isinstance(ann, type) and issubclass(ann, BaseModel):
-                try:
+                with contextlib.suppress(Exception):
                     out[name] = ann.model_json_schema()
-                except Exception:
-                    pass
                 break
     return out
 
diff --git a/services/common/src/mcp_common/microstructure.py b/services/common/src/mcp_common/microstructure.py
index 5775f4b..056f442 100644
--- a/services/common/src/mcp_common/microstructure.py
+++ b/services/common/src/mcp_common/microstructure.py
@@ -36,10 +36,7 @@ def orderbook_imbalance(
     ask_vol = sum(q for _, q in top_asks)
     total = bid_vol + ask_vol
 
-    if total == 0:
-        ratio = None
-    else:
-        ratio = (bid_vol - ask_vol) / total
+    ratio = None if total == 0 else (bid_vol - ask_vol) / total
 
     # Microprice: best bid, best ask. Weighted by opposite-side size.
     microprice = None
diff --git a/services/common/tests/test_http.py b/services/common/tests/test_http.py
index 404abc2..6a3a950 100644
--- a/services/common/tests/test_http.py
+++ b/services/common/tests/test_http.py
@@ -4,7 +4,6 @@ import asyncio
 
 import httpx
 import pytest
-
 from mcp_common.http import async_client, call_with_retry
 
 
diff --git a/services/common/tests/test_indicators.py b/services/common/tests/test_indicators.py
index f0703c0..293ddc0 100644
--- a/services/common/tests/test_indicators.py
+++ b/services/common/tests/test_indicators.py
@@ -112,7 +112,7 @@ def test_vol_cone_returns_percentiles_per_window():
     closes = _gbm_series(mu=0.0, sigma=0.5, n=400)
     out = vol_cone(closes, windows=[10, 30, 60])
     assert set(out.keys()) == {10, 30, 60}
-    for w, stats in out.items():
+    for _w, stats in out.items():
         assert "current" in stats
         assert "p10" in stats and "p50" in stats and "p90" in stats
         assert stats["p10"] <= stats["p50"] <= stats["p90"]
@@ -200,7 +200,7 @@ def test_autocorrelation_white_noise_low():
     assert len(out) == 5
     # white noise → all autocorr ≈ 0 (within ±2/sqrt(N))
     bound = 2.0 / math.sqrt(len(rets))
-    for lag, val in out.items():
+    for _lag, val in out.items():
         assert abs(val) < bound * 2  # generous
 
 
diff --git a/services/mcp-alpaca/src/mcp_alpaca/client.py b/services/mcp-alpaca/src/mcp_alpaca/client.py
index 61d0514..001d5c6 100644
--- a/services/mcp-alpaca/src/mcp_alpaca/client.py
+++ b/services/mcp-alpaca/src/mcp_alpaca/client.py
@@ -71,13 +71,13 @@ def _asset_class_enum(ac: str) -> AssetClass:
 
 def _serialize(obj: Any) -> Any:
     """Recursively convert pydantic/datetime objects → json-safe."""
-    if obj is None or isinstance(obj, (str, int, float, bool)):
+    if obj is None or isinstance(obj, str | int | float | bool):
         return obj
-    if isinstance(obj, (_dt.datetime, _dt.date)):
+    if isinstance(obj, _dt.datetime | _dt.date):
         return obj.isoformat()
     if isinstance(obj, dict):
         return {k: _serialize(v) for k, v in obj.items()}
-    if isinstance(obj, (list, tuple)):
+    if isinstance(obj, list | tuple):
         return [_serialize(v) for v in obj]
     if hasattr(obj, "model_dump"):
         return _serialize(obj.model_dump())
diff --git a/services/mcp-deribit/src/mcp_deribit/client.py b/services/mcp-deribit/src/mcp_deribit/client.py
index d473259..cc231a1 100644
--- a/services/mcp-deribit/src/mcp_deribit/client.py
+++ b/services/mcp-deribit/src/mcp_deribit/client.py
@@ -1,10 +1,10 @@
 from __future__ import annotations
 
+import contextlib
 import time
 from dataclasses import dataclass, field
 from typing import Any
 
-import httpx
 from mcp_common import indicators as ind
 from mcp_common import microstructure as micro
 from mcp_common import options as opt
@@ -196,10 +196,8 @@ class DeribitClient:
             name = s.get("instrument_name")
             oi = s.get("open_interest")
             if name and oi is not None:
-                try:
+                with contextlib.suppress(TypeError, ValueError):
                     oi_by_name[name] = float(oi)
-                except (TypeError, ValueError):
-                    pass
 
         all_items = raw.get("result") or []
         filtered: list[dict] = []
@@ -882,10 +880,9 @@ class DeribitClient:
                 shape = "backwardation"
             short_term = next((x for x in ts if 8 <= x["dte"] <= 14), None)
             mid_term = next((x for x in ts if 35 <= x["dte"] <= 45), None)
-            if short_term and mid_term:
-                if mid_term["atm_iv"] - short_term["atm_iv"] > 5:
-                    contango_steep = True
-                    calendar_opp = True
+            if short_term and mid_term and mid_term["atm_iv"] - short_term["atm_iv"] > 5:
+                contango_steep = True
+                calendar_opp = True
 
         return {
             "currency": currency,
@@ -1131,7 +1128,7 @@ class DeribitClient:
 
         structure = self._guess_structure(enriched)
 
-        notional = sum(l["quantity"] * spot for l in enriched) if spot else 0.0
+        sum(l["quantity"] * spot for l in enriched) if spot else 0.0
         fee_per_leg = min(0.0003 * (spot or 1) * sum(l["quantity"] for l in enriched),
                            0.125 * abs(net_premium)) if spot else 0.0
         fees_open = round(fee_per_leg, 4)
diff --git a/services/mcp-deribit/src/mcp_deribit/server.py b/services/mcp-deribit/src/mcp_deribit/server.py
index 7318f48..bfdc231 100644
--- a/services/mcp-deribit/src/mcp_deribit/server.py
+++ b/services/mcp-deribit/src/mcp_deribit/server.py
@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import contextlib
 import os
 
 from fastapi import Depends, FastAPI, HTTPException
@@ -272,10 +273,8 @@ def create_app(
     @asynccontextmanager
     async def _lifespan(_app: FastAPI):
         for inst in ("BTC-PERPETUAL", "ETH-PERPETUAL"):
-            try:
+            with contextlib.suppress(Exception):
                 await client.set_leverage(inst, cap_default)
-            except Exception:
-                pass
         yield
 
     app = build_app(
@@ -551,10 +550,8 @@ def create_app(
         _check(principal, core=True)
         lev = _enforce_leverage(body.leverage, creds=creds, exchange="deribit")
         if lev != cap_default:
-            try:
+            with contextlib.suppress(Exception):
                 await client.set_leverage(body.instrument_name, lev)
-            except Exception:
-                pass
         result = await client.place_order(
             instrument_name=body.instrument_name,
             side=body.side,
@@ -582,10 +579,8 @@ def create_app(
         lev = _enforce_leverage(body.leverage, creds=creds, exchange="deribit")
         if lev != cap_default:
             for leg in body.legs:
-                try:
+                with contextlib.suppress(Exception):
                     await client.set_leverage(leg.instrument_name, lev)
-                except Exception:
-                    pass
         result = await client.place_combo_order(
             legs=[leg.model_dump() for leg in body.legs],
             side=body.side,
diff --git a/services/mcp-hyperliquid/src/mcp_hyperliquid/client.py b/services/mcp-hyperliquid/src/mcp_hyperliquid/client.py
index df7e287..662c911 100644
--- a/services/mcp-hyperliquid/src/mcp_hyperliquid/client.py
+++ b/services/mcp-hyperliquid/src/mcp_hyperliquid/client.py
@@ -6,7 +6,6 @@ import asyncio
 import datetime as _dt
 from typing import Any
 
-import httpx
 from mcp_common import indicators as ind
 from mcp_common.http import async_client
 
diff --git a/services/mcp-macro/src/mcp_macro/fetchers.py b/services/mcp-macro/src/mcp_macro/fetchers.py
index 838210e..448d877 100644
--- a/services/mcp-macro/src/mcp_macro/fetchers.py
+++ b/services/mcp-macro/src/mcp_macro/fetchers.py
@@ -5,6 +5,7 @@ from typing import Any
 
 import httpx
 from mcp_common.http import async_client
+
 from mcp_macro.cot import classify_extreme, compute_percentile, parse_disagg_row, parse_tff_row
 from mcp_macro.cot_contracts import (
     ALL_DISAGG_SYMBOLS,
diff --git a/services/mcp-macro/tests/test_cot.py b/services/mcp-macro/tests/test_cot.py
index 0151718..1544e77 100644
--- a/services/mcp-macro/tests/test_cot.py
+++ b/services/mcp-macro/tests/test_cot.py
@@ -1,6 +1,11 @@
 from __future__ import annotations
 
-from mcp_macro.cot import classify_extreme, compute_percentile
+from mcp_macro.cot import (
+    classify_extreme,
+    compute_percentile,
+    parse_disagg_row,
+    parse_tff_row,
+)
 
 
 def test_compute_percentile_basic():
@@ -44,9 +49,6 @@ def test_classify_extreme_none_input():
     assert classify_extreme(None) == "neutral"
 
 
-from mcp_macro.cot import parse_disagg_row, parse_tff_row
-
-
 # Payload Socrata reale (subset campi rilevanti, valori arbitrari per test)
 TFF_SOCRATA_ROW = {
     "report_date_as_yyyy_mm_dd": "2026-04-22T00:00:00.000",
diff --git a/services/mcp-macro/tests/test_fetchers.py b/services/mcp-macro/tests/test_fetchers.py
index a891506..f3e96f0 100644
--- a/services/mcp-macro/tests/test_fetchers.py
+++ b/services/mcp-macro/tests/test_fetchers.py
@@ -366,6 +366,7 @@ async def test_fetch_cot_disagg_unknown_symbol():
 async def test_fetch_cot_extreme_positioning_flags_outliers(monkeypatch):
     """Mock fetch_cot_tff e fetch_cot_disagg per simulare history e ultimo punto."""
     from unittest.mock import AsyncMock
+
     from mcp_macro import fetchers as f
 
     # Simula una serie ES dove ultimo lev_funds_net è in basso (extreme_short)
diff --git a/services/mcp-macro/tests/test_server_acl.py b/services/mcp-macro/tests/test_server_acl.py
index fa24cbc..91bebd7 100644
--- a/services/mcp-macro/tests/test_server_acl.py
+++ b/services/mcp-macro/tests/test_server_acl.py
@@ -127,7 +127,6 @@ def test_get_market_overview_no_auth_401(http):
     assert r.status_code == 401
 
 
-from unittest.mock import AsyncMock, patch
 
 
 def test_get_cot_tff_core_ok(http):
diff --git a/services/mcp-sentiment/src/mcp_sentiment/fetchers.py b/services/mcp-sentiment/src/mcp_sentiment/fetchers.py
index f996dac..7fc907f 100644
--- a/services/mcp-sentiment/src/mcp_sentiment/fetchers.py
+++ b/services/mcp-sentiment/src/mcp_sentiment/fetchers.py
@@ -5,7 +5,6 @@ import re
 import xml.etree.ElementTree as ET
 from typing import Any
 
-import httpx
 from mcp_common.http import async_client
 
 CRYPTOPANIC_URL = "https://cryptopanic.com/api/v1/posts/"
diff --git a/services/mcp-sentiment/src/mcp_sentiment/server.py b/services/mcp-sentiment/src/mcp_sentiment/server.py
index 68bac9b..65f05b4 100644
--- a/services/mcp-sentiment/src/mcp_sentiment/server.py
+++ b/services/mcp-sentiment/src/mcp_sentiment/server.py
@@ -9,8 +9,6 @@ from mcp_common.mcp_bridge import mount_mcp_endpoint
 from mcp_common.server import build_app
 from pydantic import BaseModel
 
-logger = logging.getLogger(__name__)
-
 from mcp_sentiment.fetchers import (
     fetch_cointegration_pairs,
     fetch_cross_exchange_funding,
@@ -23,6 +21,8 @@ from mcp_sentiment.fetchers import (
     fetch_world_news,
 )
 
+logger = logging.getLogger(__name__)
+
 # --- Body models ---
 
 class GetCryptoNewsReq(BaseModel):