diff --git a/dank_mids/ENVIRONMENT_VARIABLES.py b/dank_mids/ENVIRONMENT_VARIABLES.py
index e13d746d..f8d85bad 100644
--- a/dank_mids/ENVIRONMENT_VARIABLES.py
+++ b/dank_mids/ENVIRONMENT_VARIABLES.py
@@ -58,6 +58,7 @@
 # Set this env var to any value to force the full request spec always
 USE_FULL_REQUEST = _envs.create_env("USE_FULL_REQUEST", bool, default=False, verbose=False)
 
+DEBUG = _envs.create_env("DEBUG", bool, default=False, verbose=False)
 # NOTE: EXPORT_STATS is not implemented
 # TODO: implement this
 EXPORT_STATS = _envs.create_env("EXPORT_STATS", bool, default=False, verbose=False)
diff --git a/dank_mids/_debugging/__init__.py b/dank_mids/_debugging/__init__.py
new file mode 100644
index 00000000..09395aba
--- /dev/null
+++ b/dank_mids/_debugging/__init__.py
@@ -0,0 +1,5 @@
+"""This module is private for now but will eventually be made public when the api ossifies"""
+
+from dank_mids._debugging import failures
+
+__all__ = ['failures']
diff --git a/dank_mids/_debugging/_base.py b/dank_mids/_debugging/_base.py
new file mode 100644
index 00000000..4edc7280
--- /dev/null
+++ b/dank_mids/_debugging/_base.py
@@ -0,0 +1,59 @@
+
+import abc
+import logging
+import os
+from functools import cached_property, lru_cache
+from typing import Any, Iterable
+
+import aiofiles
+from aiofiles.base import AiofilesContextManager
+from aiofiles.threadpool.text import AsyncTextIOWrapper
+from async_lru import alru_cache
+
+logger = logging.getLogger("dank_mids.debugging")
+
+class _FileHelper(metaclass=abc.ABCMeta):
+    path = f"{os.path.expanduser( '~' )}/.dank_mids/debug"
+    def __init__(self, chainid: int):
+        if not isinstance(chainid, int):
+            raise TypeError(f"`chainid` must be an integer. You passed {chainid}") from None
+        self.chainid = chainid
+        self.path = self.path + f"/{self.chainid}"
+        self.ensure_dir()
+    @lru_cache(maxsize=1)
+    def ensure_dir(self) -> None:
+        os.makedirs(self.path, exist_ok=True)
+    def open(self) -> "AiofilesContextManager[None, None, AsyncTextIOWrapper]":
+        logger.info("opening %s with mode %s", self.uri, self.mode)
+        return aiofiles.open(self.uri, self.mode)
+    @abc.abstractproperty
+    def uri(self) -> str:
+        ...
+    @abc.abstractproperty
+    def mode(self) -> str:
+        ...
+
+class _CSVWriter(_FileHelper):
+    mode = "a"
+    @cached_property
+    def uri(self) -> str:
+        return f"{self.path}/{self.filename}"
+    async def write_row(self, *values: Any) -> None:
+        await self._ensure_headers()
+        await self._write_row(*values)
+    @alru_cache(maxsize=None)
+    async def _ensure_headers(self) -> None:
+        await self._write_row(*self.column_names, new_line=False)
+    async def _write_row(self, *values: Any, new_line: bool = True) -> None:
+        row = ','.join(str(obj) for obj in values)
+        if new_line:
+            row = f'\n{row}'
+        async with self.open() as file:
+            logger.debug("writing row %s to file %s", row, file)
+            await file.write(row)
+    @abc.abstractproperty
+    def filename(self) -> str:
+        ...
+    @abc.abstractproperty
+    def column_names(self) -> Iterable[str]:
+        ...
\ No newline at end of file
diff --git a/dank_mids/_debugging/failures.py b/dank_mids/_debugging/failures.py
new file mode 100644
index 00000000..785666da
--- /dev/null
+++ b/dank_mids/_debugging/failures.py
@@ -0,0 +1,31 @@
+
+from datetime import datetime
+from functools import cached_property, lru_cache
+from typing import TYPE_CHECKING, List, Type, Union
+
+from a_sync import ProcessingQueue
+
+from dank_mids._debugging._base import _CSVWriter
+
+if TYPE_CHECKING:
+    from dank_mids.types import PartialRequest, Request
+
+@lru_cache(maxsize=None)
+class FailedRequestWriter(_CSVWriter):
+    column_names = "request_type", "request_uid", "error", "request_data"
+    def __init__(self, chainid: int, failure_type: Type[BaseException]):
+        super().__init__(chainid)
+        if not issubclass(failure_type, BaseException):
+            raise TypeError(f"`failure_type` must be an Exception type. You passed {failure_type}")
+        self.failure_type = failure_type
+        self.record_failure = ProcessingQueue(self._record_failure, num_workers=1, return_data=True)
+    @cached_property
+    def filename(self) -> str:
+        return f"{int(datetime.now().timestamp())}_{self.failure_type.__name__}s.csv"
+    async def _record_failure(self, e: Exception, request_type: str, request_uid: Union[str, int], request_data: Union[List["Request"], List["PartialRequest"], bytes]):
+        if not isinstance(e, self.failure_type):
+            raise TypeError(e, self.failure_type)
+        await self.write_row(request_type, request_uid, e, request_data)
+
+def record(chainid: int, e: Exception, request_type: str, request_uid: Union[int, str], request_data: Union[List["Request"], List["PartialRequest"], bytes]) -> None:
+    FailedRequestWriter(chainid, type(e)).record_failure(e, request_type, request_uid, request_data)
diff --git a/dank_mids/_requests.py b/dank_mids/_requests.py
index fb057abb..cfcda395 100644
--- a/dank_mids/_requests.py
+++ b/dank_mids/_requests.py
@@ -24,7 +24,7 @@
 from web3.types import RPCEndpoint, RPCResponse
 
 from dank_mids import ENVIRONMENT_VARIABLES as ENVS
-from dank_mids import constants, stats
+from dank_mids import _debugging, constants, stats
 from dank_mids._demo_mode import demo_logger
 from dank_mids._exceptions import (BadResponse, DankMidsClientResponseError,
                                    DankMidsInternalError, EmptyBatch,
@@ -521,11 +521,14 @@ async def get_response(self) -> None:
             if e.message == "Payload Too Large":
                 logger.info("Payload too large. response headers: %s", e.headers)
                 self.controller.reduce_multicall_size(len(self))
+                _debugging.failures.record(self.controller.chain_id, e, type(self).__name__, self.uid, self.request.data)
             else:
-                _log_exception(e)
+                if _log_exception(e):
+                    _debugging.failures.record(self.controller.chain_id, e, type(self).__name__, self.uid, self.request.data)
             await (self.bisect_and_retry(e) if self.should_retry(e) else self.spoof_response(e))  # type: ignore [misc]
         except Exception as e:
-            _log_exception(e)
+            if _log_exception(e):
+                _debugging.failures.record(self.controller.chain_id, e, type(self).__name__, self.uid, self.request.data)
             await (self.bisect_and_retry(e) if self.should_retry(e) else self.spoof_response(e))  # type: ignore [misc]
         demo_logger.info(f'request {rid} for multicall {self.bid} complete')  # type: ignore
     
@@ -697,7 +700,8 @@ async def get_response(self) -> None:
             self.adjust_batch_size()
             await self.bisect_and_retry(e)
         except Exception as e:
-            _log_exception(e)
+            if _log_exception(e):
+                _debugging.failures.record(self.controller.chain_id, e, type(self).__name__, self.uid, self.data)
             stats.log_errd_batch(self)
             if self.should_retry(e):
                 await self.bisect_and_retry(e)
@@ -728,10 +732,14 @@ async def post(self) -> List[RawResponse]:
             elif 'broken pipe' in str(e).lower():
                 logger.warning("This is what broke the pipe: %s", self.method_counts)
             logger.debug("caught %s for %s, reraising", e, self)
+            if ENVS.DEBUG:
+                _debugging.failures.record(self.controller.chain_id, e, type(self).__name__, self.uid, self.data)
             raise e
         except Exception as e:
             if 'broken pipe' in str(e).lower():
                 logger.warning("This is what broke the pipe: %s", self.method_counts)
+            if ENVS.DEBUG:
+                _debugging.failures.record(self.controller.chain_id, e, type(self).__name__, self.uid, self.data)
             raise e
         # NOTE: A successful response will be a list of `RawResponse` objects.
         #       A single `PartialResponse` implies an error.
@@ -747,6 +755,9 @@ async def post(self) -> List[RawResponse]:
                 logger.debug("your node says the partial request was invalid but its okay, we can use the full jsonrpc spec instead")
         elif response.error.message == "batch limit exceeded":
             self.adjust_batch_size()
+            
+        if ENVS.DEBUG:
+            _debugging.failures.record(self.controller.chain_id, response.exception, type(self).__name__, self.uid, self.data)
         raise response.exception
     
     def should_retry(self, e: Exception) -> bool:
@@ -819,7 +830,7 @@ def _post_future_cleanup(self) -> None:
         with self.controller.pools_closed_lock:
             self.controller.pending_rpc_calls = JSONRPCBatch(self.controller)
 
-def _log_exception(e: Exception) -> None:
+def _log_exception(e: Exception) -> bool:
     # NOTE: These errors are expected during normal use and are not indicative of any problem(s). No need to log them.
     # TODO: Better filter what we choose to log here
     dont_need_to_see_errs = constants.RETRY_ERRS + ['out of gas', 'non_empty_data', 'exceeding --rpc.returndata.limit', "'code': 429", 'payload too large']
@@ -830,9 +841,12 @@ def _log_exception(e: Exception) -> None:
         # We pass these down to the call they originated from
         *INDIVIDUAL_CALL_REVERT_STRINGS
     ]
+
+    
     
     stre = str(e).lower()
     if any(err in stre for err in dont_need_to_see_errs):
-        return
+        return ENVS.DEBUG
     logger.warning("The following exception is being logged for informational purposes and does not indicate failure:")
     logger.warning(e, exc_info=True)
+    return ENVS.DEBUG
\ No newline at end of file
diff --git a/dank_mids/controller.py b/dank_mids/controller.py
index a5a180a4..51f87834 100644
--- a/dank_mids/controller.py
+++ b/dank_mids/controller.py
@@ -16,7 +16,7 @@
 from web3.types import RPCEndpoint, RPCResponse
 
 from dank_mids import ENVIRONMENT_VARIABLES as ENVS
-from dank_mids import constants
+from dank_mids import _debugging, constants
 from dank_mids._batch import DankBatch
 from dank_mids._demo_mode import demo_logger
 from dank_mids._exceptions import DankMidsInternalError
@@ -133,7 +133,12 @@ async def __call__(self, method: RPCEndpoint, params: Any) -> RPCResponse:
     @eth_retry.auto_retry
     async def make_request(self, method: str, params: List[Any], request_id: Optional[int] = None) -> RawResponse:
         request = self.request_type(method=method, params=params, id=request_id or self.call_uid.next)
-        return await _session.post(self.endpoint, data=request, loads=_decode.raw)
+        try:
+            return await _session.post(self.endpoint, data=request, loads=_decode.raw)
+        except Exception as e:
+            if ENVS.DEBUG:
+                _debugging.failures.record(self.chain_id, e, "eth_call" if method == "eth_call" else "RPCRequest", "unknown", request.data)
+            raise
 
     async def execute_batch(self) -> None:
         with self.pools_closed_lock:  # Do we really need this?  # NOTE: yes we do
diff --git a/requirements.txt b/requirements.txt
index ad6d4873..3c7eb796 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,6 @@
+aiofiles
 eth_retry>=0.1.15,<0.2
-ez-a-sync>=0.6.3
+ez-a-sync>=0.19.4
 msgspec
 multicall>=0.6.2,<1
 typed-envs>=0.0.2