diff --git a/.github/workflows/python_ci.yaml b/.github/workflows/python_ci.yaml
index 5c5bdcf5..45eb7778 100644
--- a/.github/workflows/python_ci.yaml
+++ b/.github/workflows/python_ci.yaml
@@ -80,3 +80,15 @@ jobs:
         run: |
           poetry run isort --profile black .
           git diff --exit-code || exit 1
+
+  pre-commit:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: ./.github/actions/python_prepare
+      - name: Install Dependencies
+        run: |
+          pip install pre-commit
+      - name: Run Pre-Commit
+        run: |
+          pre-commit run --all-files
\ No newline at end of file
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 00000000..e348caff
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,9 @@
+ repos:
+  - repo: https://github.com/kongzii/pre-commit-hooks
+    rev: peter/web3
+    hooks:
+      - id: detect-private-key
+      - id: check-added-large-files
+        args: ['--maxkb=5000']
+      - id: detect-web3-private-key
+        exclude: 'poetry.lock'
diff --git a/README.md b/README.md
index b87b7d4a..db757aea 100644
--- a/README.md
+++ b/README.md
@@ -133,4 +133,4 @@ This API can be built on top of to create your application. See [here](https://g
 
 See the [Issues](https://github.com/gnosis/prediction-market-agent-tooling/issues) for ideas of things that need fixing or implementing. The team is also receptive to new issues and PRs.
 
-We use `mypy` for static type checking, and `isort`, `black` and `autoflake` for linting. These all run as steps in CI.
+We use `mypy` for static type checking, and `isort`, `black` and `autoflake` for linting, and `pre-commit` to minimise unwanted pushes to the public repositories. These all run as steps in CI, but `pre-commit` also needs to be installed locally using the provided `install_hooks.sh` script.
diff --git a/install_hooks.sh b/install_hooks.sh
new file mode 100755
index 00000000..bae18c74
--- /dev/null
+++ b/install_hooks.sh
@@ -0,0 +1,13 @@
+#!/bin/bash
+
+# Install pre-commit if not already installed
+if ! command -v pre-commit &> /dev/null
+then
+    echo "pre-commit is not installed. Installing now..."
+    brew install pre-commit
+fi
+
+# Install the hooks
+pre-commit install
+
+echo "Pre-commit hooks installed successfully."
diff --git a/poetry.lock b/poetry.lock
index a5e66fe8..906c7a07 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,4 +1,4 @@
-# This file is automatically @generated by Poetry 1.8.3 and should not be changed by hand.
+# This file is automatically @generated by Poetry 1.8.2 and should not be changed by hand.
 
 [[package]]
 name = "aiohappyeyeballs"
@@ -1663,12 +1663,12 @@ files = [
 google-auth = ">=2.14.1,<3.0.dev0"
 googleapis-common-protos = ">=1.56.2,<2.0.dev0"
 grpcio = [
-    {version = ">=1.49.1,<2.0dev", optional = true, markers = "python_version >= \"3.11\" and extra == \"grpc\""},
     {version = ">=1.33.2,<2.0dev", optional = true, markers = "python_version < \"3.11\" and extra == \"grpc\""},
+    {version = ">=1.49.1,<2.0dev", optional = true, markers = "python_version >= \"3.11\" and extra == \"grpc\""},
 ]
 grpcio-status = [
-    {version = ">=1.49.1,<2.0.dev0", optional = true, markers = "python_version >= \"3.11\" and extra == \"grpc\""},
     {version = ">=1.33.2,<2.0.dev0", optional = true, markers = "python_version < \"3.11\" and extra == \"grpc\""},
+    {version = ">=1.49.1,<2.0.dev0", optional = true, markers = "python_version >= \"3.11\" and extra == \"grpc\""},
 ]
 proto-plus = ">=1.22.3,<2.0.0dev"
 protobuf = ">=3.19.5,<3.20.0 || >3.20.0,<3.20.1 || >3.20.1,<4.21.0 || >4.21.0,<4.21.1 || >4.21.1,<4.21.2 || >4.21.2,<4.21.3 || >4.21.3,<4.21.4 || >4.21.4,<4.21.5 || >4.21.5,<6.0.0.dev0"
@@ -3514,8 +3514,8 @@ files = [
 
 [package.dependencies]
 numpy = [
-    {version = ">=1.23.2", markers = "python_version == \"3.11\""},
     {version = ">=1.22.4", markers = "python_version < \"3.11\""},
+    {version = ">=1.23.2", markers = "python_version == \"3.11\""},
     {version = ">=1.26.0", markers = "python_version >= \"3.12\""},
 ]
 python-dateutil = ">=2.8.2"
@@ -4005,6 +4005,7 @@ files = [
     {file = "psycopg2_binary-2.9.10-cp313-cp313-musllinux_1_2_i686.whl", hash = "sha256:bb89f0a835bcfc1d42ccd5f41f04870c1b936d8507c6df12b7737febc40f0909"},
     {file = "psycopg2_binary-2.9.10-cp313-cp313-musllinux_1_2_ppc64le.whl", hash = "sha256:f0c2d907a1e102526dd2986df638343388b94c33860ff3bbe1384130828714b1"},
     {file = "psycopg2_binary-2.9.10-cp313-cp313-musllinux_1_2_x86_64.whl", hash = "sha256:f8157bed2f51db683f31306aa497311b560f2265998122abe1dce6428bd86567"},
+    {file = "psycopg2_binary-2.9.10-cp313-cp313-win_amd64.whl", hash = "sha256:27422aa5f11fbcd9b18da48373eb67081243662f9b46e6fd07c3eb46e4535142"},
     {file = "psycopg2_binary-2.9.10-cp38-cp38-macosx_12_0_x86_64.whl", hash = "sha256:eb09aa7f9cecb45027683bb55aebaaf45a0df8bf6de68801a6afdc7947bb09d4"},
     {file = "psycopg2_binary-2.9.10-cp38-cp38-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:b73d6d7f0ccdad7bc43e6d34273f70d587ef62f824d7261c4ae9b8b1b6af90e8"},
     {file = "psycopg2_binary-2.9.10-cp38-cp38-manylinux_2_17_i686.manylinux2014_i686.whl", hash = "sha256:ce5ab4bf46a211a8e924d307c1b1fcda82368586a19d0a24f8ae166f5c784864"},
@@ -4255,6 +4256,7 @@ description = "Pure-Python implementation of ASN.1 types and DER/BER/CER codecs
 optional = false
 python-versions = ">=3.8"
 files = [
+    {file = "pyasn1-0.6.1-py3-none-any.whl", hash = "sha256:0d632f46f2ba09143da3a8afe9e33fb6f92fa2320ab7e886e2d0f7672af84629"},
     {file = "pyasn1-0.6.1.tar.gz", hash = "sha256:6f580d2bdd84365380830acf45550f2511469f673cb4a5ae3857a3170128b034"},
 ]
 
@@ -4265,6 +4267,7 @@ description = "A collection of ASN.1-based protocols modules"
 optional = false
 python-versions = ">=3.8"
 files = [
+    {file = "pyasn1_modules-0.4.1-py3-none-any.whl", hash = "sha256:49bfa96b45a292b711e986f222502c1c9a5e1f4e568fc30e2574a6c7d07838fd"},
     {file = "pyasn1_modules-0.4.1.tar.gz", hash = "sha256:c28e2dbf9c06ad61c71a075c7e0f9fd0f1b0bb2d2ad4377f240d33ac2ab60a7c"},
 ]
 
@@ -6335,4 +6338,4 @@ optuna = ["optuna"]
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.10,<3.13"
-content-hash = "248ddd11705c3552209c98fe50f18c91f3aeec9173c169421a83ac5da63e69d7"
+content-hash = "09ca1a54df359f2366f7c3d1ee7ab9490b20c6a4250cf06e186e22fe13f5202c"
diff --git a/prediction_market_agent_tooling/gtypes.py b/prediction_market_agent_tooling/gtypes.py
index 49b04985..955fdc30 100644
--- a/prediction_market_agent_tooling/gtypes.py
+++ b/prediction_market_agent_tooling/gtypes.py
@@ -82,5 +82,5 @@ def secretstr_to_v1_secretstr(s: SecretStr | None) -> SecretStrV1 | None:
 
 
 def int_to_hexbytes(v: int) -> HexBytes:
-    # Example: 1 -> HexBytes("0x0000000000000000000000000000000000000000000000000000000000000001").
+    # Example: 1 -> HexBytes("0x0000000000000000000000000000000000000000000000000000000000000001"). # web3-private-key-ok
     return HexBytes.fromhex(format(v, "064x"))
diff --git a/prediction_market_agent_tooling/markets/omen/data_models.py b/prediction_market_agent_tooling/markets/omen/data_models.py
index bb1fecd9..109fb25e 100644
--- a/prediction_market_agent_tooling/markets/omen/data_models.py
+++ b/prediction_market_agent_tooling/markets/omen/data_models.py
@@ -584,7 +584,7 @@ class FixedProductMarketMakersResponse(BaseModel):
 
 
 class RealityQuestion(BaseModel):
-    # This `id` is in form of `0x79e32ae03fb27b07c89c0c568f80287c01ca2e57-0x2d362f435e7b5159794ff0b5457a900283fca41fe6301dc855a647595903db13`,
+    # This `id` is in form of `0x79e32ae03fb27b07c89c0c568f80287c01ca2e57-0x2d362f435e7b5159794ff0b5457a900283fca41fe6301dc855a647595903db13`, # web3-private-key-ok
     # which I couldn't find how it is created, but based on how it looks like I assume it's composed of `answerId-questionId`.
     # (Why is answer id as part of the question object? Because this question object is actually received from the answer object below).
     # And because all the contract methods so far needed bytes32 input, when asked for question id, `questionId` field was the correct one to use so far.
diff --git a/prediction_market_agent_tooling/markets/omen/omen.py b/prediction_market_agent_tooling/markets/omen/omen.py
index f80328db..41043547 100644
--- a/prediction_market_agent_tooling/markets/omen/omen.py
+++ b/prediction_market_agent_tooling/markets/omen/omen.py
@@ -1209,7 +1209,7 @@ def omen_remove_fund_market_tx(
     amount_per_index_set = get_conditional_tokens_balance_for_market(
         market, from_address, web3
     )
-    # We fetch the minimum balance of outcome token - for ex, in this tx (https://gnosisscan.io/tx/0xc31c4e9bc6a60cf7db9991a40ec2f2a06e3539f8cb8dd81b6af893cef6f40cd7#eventlog) - event #460, this should yield 9804940144070370149. This amount matches what is displayed in the Omen UI.
+    # We fetch the minimum balance of outcome token - for ex, in this tx (https://gnosisscan.io/tx/0xc31c4e9bc6a60cf7db9991a40ec2f2a06e3539f8cb8dd81b6af893cef6f40cd7#eventlog) - event #460, this should yield 9804940144070370149. This amount matches what is displayed in the Omen UI. # web3-private-key-ok
     # See similar logic from Olas
     # https://github.com/valory-xyz/market-creator/blob/4bc47f696fb5ecb61c3b7ec8c001ff2ab6c60fcf/packages/valory/skills/market_creation_manager_abci/behaviours.py#L1308
     amount_to_merge = min(amount_per_index_set.values())
diff --git a/prediction_market_agent_tooling/tools/hexbytes_custom.py b/prediction_market_agent_tooling/tools/hexbytes_custom.py
index 303b1e6e..ebd09cc2 100644
--- a/prediction_market_agent_tooling/tools/hexbytes_custom.py
+++ b/prediction_market_agent_tooling/tools/hexbytes_custom.py
@@ -23,7 +23,7 @@ class BaseHex:
         "0xd4e56740",
         "0xd4e56740f876aef8",
         "0xd4e56740f876aef8c010b86a40d5f567",
-        "0xd4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3",
+        "0xd4e56740f876aef8c010b86a40d5f56745a118d0906a34e69aec8c0db1cb8fa3",  # web3-private-key-ok
     )
 
     @classmethod
diff --git a/pyproject.toml b/pyproject.toml
index 0e478369..a3808f52 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,6 +54,7 @@ pinatapy-vourhey = "^0.2.0"
 hishel = "^0.0.31"
 pytest-postgresql = "^6.1.1"
 optuna = { version = "^4.1.0", optional = true}
+eth-keys = "^0.6.1"
 
 [tool.poetry.extras]
 openai = ["openai"]
diff --git a/scripts/store_prediction.py b/scripts/store_prediction.py
index 42526671..ecb44851 100644
--- a/scripts/store_prediction.py
+++ b/scripts/store_prediction.py
@@ -31,9 +31,7 @@ def main(
         SAFE_ADDRESS=None,
     )
     market_address = Web3.to_checksum_address(api_keys.public_key)
-    dummy_transaction_hash = (
-        "0x3750ffa211dab39b4d0711eb27b02b56a17fa9d257ee549baa3110725fd1d41b"
-    )
+    dummy_transaction_hash = "0x3750ffa211dab39b4d0711eb27b02b56a17fa9d257ee549baa3110725fd1d41b"  # web3-private-key-ok
     contract_prediction = ContractPrediction(
         tx_hashes=[HexBytes(dummy_transaction_hash)],
         estimated_probability_bps=5454,
diff --git a/tests/markets/omen/test_omen_subgraph_handler.py b/tests/markets/omen/test_omen_subgraph_handler.py
index e3e57d23..3c916cd8 100644
--- a/tests/markets/omen/test_omen_subgraph_handler.py
+++ b/tests/markets/omen/test_omen_subgraph_handler.py
@@ -150,9 +150,15 @@ def test_get_user_positions_1(
     )
     # Assert 3 conditionIds are included
     expected_condition_ids = [
-        HexBytes("0x9c7711bee0902cc8e6838179058726a7ba769cc97d4d0ea47b31370d2d7a117b"),
-        HexBytes("0xe2bf80af2a936cdabeef4f511620a2eec46f1caf8e75eb5dc189372367a9154c"),
-        HexBytes("0x3f8153364001b26b983dd92191a084de8230f199b5ad0b045e9e1df61089b30d"),
+        HexBytes(
+            "0x9c7711bee0902cc8e6838179058726a7ba769cc97d4d0ea47b31370d2d7a117b"  # web3-private-key-ok
+        ),
+        HexBytes(
+            "0xe2bf80af2a936cdabeef4f511620a2eec46f1caf8e75eb5dc189372367a9154c"  # web3-private-key-ok
+        ),
+        HexBytes(
+            "0x3f8153364001b26b983dd92191a084de8230f199b5ad0b045e9e1df61089b30d"  # web3-private-key-ok
+        ),
     ]
     unique_condition_ids: list[HexBytes] = sum(
         [u.position.conditionIds for u in user_positions], []
@@ -162,7 +168,9 @@ def test_get_user_positions_1(
 
 def test_get_answers(omen_subgraph_handler: OmenSubgraphHandler) -> None:
     question_id = HexBytes.fromhex(
-        HexStr("0xdcb2691a9ec05e25a6e595a9972b482ea65b789d978b27c0c06ff97345fce919")
+        HexStr(
+            "0xdcb2691a9ec05e25a6e595a9972b482ea65b789d978b27c0c06ff97345fce919"  # web3-private-key-ok
+        )
     )
     answers = omen_subgraph_handler.get_answers(question_id)
     assert len(answers) == 1
@@ -174,7 +182,9 @@ def test_get_answers(omen_subgraph_handler: OmenSubgraphHandler) -> None:
 
 def test_get_responses(omen_subgraph_handler: OmenSubgraphHandler) -> None:
     question_id = HexBytes.fromhex(
-        HexStr("0xdcb2691a9ec05e25a6e595a9972b482ea65b789d978b27c0c06ff97345fce919")
+        HexStr(
+            "0xdcb2691a9ec05e25a6e595a9972b482ea65b789d978b27c0c06ff97345fce919"  # web3-private-key-ok
+        )
     )
     responses = omen_subgraph_handler.get_responses(limit=None, question_id=question_id)
     assert len(responses) == 1
@@ -190,23 +200,23 @@ def test_get_responses(omen_subgraph_handler: OmenSubgraphHandler) -> None:
         None,
         [
             HexBytes(
-                "0x00f57ca97d4fc07c70c0900df502dacfca455dd435643fcfab44e122b7da8684"
+                "0x00f57ca97d4fc07c70c0900df502dacfca455dd435643fcfab44e122b7da8684"  # web3-private-key-ok
             )
         ],
         [
             HexBytes(
-                "0x00f57ca97d4fc07c70c0900df502dacfca455dd435643fcfab44e122b7da8684"
+                "0x00f57ca97d4fc07c70c0900df502dacfca455dd435643fcfab44e122b7da8684"  # web3-private-key-ok
             ),
             HexBytes(
-                "0xfa2f09d7375837e791c66f7ccee06d4fa7955812baf668883c2a5f939670ef33"
+                "0xfa2f09d7375837e791c66f7ccee06d4fa7955812baf668883c2a5f939670ef33"  # web3-private-key-ok
             ),
         ],
         [
             HexBytes(
-                "0x00f57ca97d4fc07c70c0900df502dacfca455dd435643fcfab44e122b7da8684"
+                "0x00f57ca97d4fc07c70c0900df502dacfca455dd435643fcfab44e122b7da8684"  # web3-private-key-ok
             ),
             HexBytes(
-                "0xfa2f09d7375837e791c66f7ccee06d4fa7955812baf668883c2a5f939670ef33"
+                "0xfa2f09d7375837e791c66f7ccee06d4fa7955812baf668883c2a5f939670ef33"  # web3-private-key-ok
             ),
         ]
         * 100,  # Multiply to test if API won't fail with many IDs in the list.
@@ -233,7 +243,9 @@ def test_get_market_with_condition_ids(
     omen_subgraph_handler: OmenSubgraphHandler,
 ) -> None:
     condition_ids = [
-        HexBytes("0x9c7711bee0902cc8e6838179058726a7ba769cc97d4d0ea47b31370d2d7a117b")
+        HexBytes(
+            "0x9c7711bee0902cc8e6838179058726a7ba769cc97d4d0ea47b31370d2d7a117b"  # web3-private-key-ok
+        )
     ]
     expected_market_title = (
         "Will the Federal Reserve cut interest rates on 28 March 2024?"
@@ -251,8 +263,12 @@ def test_get_markets_from_multiple_user_positions(
     omen_subgraph_handler: OmenSubgraphHandler,
 ) -> None:
     condition_ids = [
-        HexBytes("0xe2bf80af2a936cdabeef4f511620a2eec46f1caf8e75eb5dc189372367a9154c"),
-        HexBytes("0x3f8153364001b26b983dd92191a084de8230f199b5ad0b045e9e1df61089b30d"),
+        HexBytes(
+            "0xe2bf80af2a936cdabeef4f511620a2eec46f1caf8e75eb5dc189372367a9154c"  # web3-private-key-ok
+        ),
+        HexBytes(
+            "0x3f8153364001b26b983dd92191a084de8230f199b5ad0b045e9e1df61089b30d"  # web3-private-key-ok
+        ),
     ]
     user_positions = [
         build_incomplete_user_position_from_condition_ids([condition_id])
@@ -268,7 +284,7 @@ def test_get_positions_by_condition_id(
     omen_subgraph_handler: OmenSubgraphHandler,
 ) -> None:
     condition_id = HexBytes(
-        "0xffe4bf3e61be010728813a2a61ef422fd7d07b410170b64a5dfced9549f2e057"
+        "0xffe4bf3e61be010728813a2a61ef422fd7d07b410170b64a5dfced9549f2e057"  # web3-private-key-ok
     )
     positions = omen_subgraph_handler.get_positions(condition_id)
     assert len(positions) == 2
@@ -365,7 +381,7 @@ def test_get_arbitrated_market_with_answer(
     assert omen_subgraph_handler.get_questions(
         limit=None,
         question_id=HexBytes(
-            "0xfd9c313aca5b704d6d4920ab7dd4c6d1ebcdfa0242df8dc517a050643419285b"
+            "0xfd9c313aca5b704d6d4920ab7dd4c6d1ebcdfa0242df8dc517a050643419285b"  # web3-private-key-ok
         ),
         with_answers=True,
     ), "Should return it, because that questionId has an answer."
@@ -374,11 +390,11 @@ def test_get_arbitrated_market_with_answer(
 def test_do_not_get_arbitrated_market_without_answer(
     omen_subgraph_handler: OmenSubgraphHandler,
 ) -> None:
-    # If this test starts to fail, check if `0xfd9c313aca5b704d6d4920ab7dd4c6d1ebcdfa0242df8dc517a050643419285b` isn't arbitrated anymore, and if so simply delete this test.
+    # If this test starts to fail, check if `0xfd9c313aca5b704d6d4920ab7dd4c6d1ebcdfa0242df8dc517a050643419285b` isn't arbitrated anymore, and if so simply delete this test.  # web3-private-key-ok
     assert not omen_subgraph_handler.get_questions(
         limit=None,
         question_id=HexBytes(
-            "0xfd9c313aca5b704d6d4920ab7dd4c6d1ebcdfa0242df8dc517a050643419285b"
+            "0xfd9c313aca5b704d6d4920ab7dd4c6d1ebcdfa0242df8dc517a050643419285b"  # web3-private-key-ok
         ),
         with_answers=False,
     ), "Should not return anything, because that questionId has an answer."
diff --git a/tests/tools/test_web3_utils.py b/tests/tools/test_web3_utils.py
index ec26d203..65f0ef53 100644
--- a/tests/tools/test_web3_utils.py
+++ b/tests/tools/test_web3_utils.py
@@ -13,9 +13,7 @@
 
 
 def test_private_key_to_public_key() -> None:
-    ganache_private_key_example = (
-        "0x94c589f92a38698b984605efbc0bff47208c43eac85ab6ea553cc9e17c4a49fe"
-    )
+    ganache_private_key_example = "0x94c589f92a38698b984605efbc0bff47208c43eac85ab6ea553cc9e17c4a49fe"  # web3-private-key-ok
     ganache_public_key_example = "0x4c24e51488429E013f259A7FB6Ac174c715BB66a"
     actual_public_key = private_key_to_public_key(
         SecretStr(ganache_private_key_example)
diff --git a/tests_integration_with_local_chain/markets/omen/test_omen.py b/tests_integration_with_local_chain/markets/omen/test_omen.py
index 9cfd5cde..de3165be 100644
--- a/tests_integration_with_local_chain/markets/omen/test_omen.py
+++ b/tests_integration_with_local_chain/markets/omen/test_omen.py
@@ -455,14 +455,15 @@ def get_position_balance_by_position_id(
 
 @pytest.mark.parametrize(
     "ipfs_hash",
-    ["0x3750ffa211dab39b4d0711eb27b02b56a17fa9d257ee549baa3110725fd1d41b", HASH_ZERO],
+    [
+        "0x3750ffa211dab39b4d0711eb27b02b56a17fa9d257ee549baa3110725fd1d41b",  # web3-private-key-ok
+        HASH_ZERO,
+    ],
 )
 def test_add_predictions(local_web3: Web3, test_keys: APIKeys, ipfs_hash: str) -> None:
     agent_result_mapping = OmenAgentResultMappingContract()
     market_address = test_keys.public_key
-    dummy_transaction_hash = (
-        "0x3750ffa211dab39b4d0711eb27b02b56a17fa9d257ee549baa3110725fd1d41b"
-    )
+    dummy_transaction_hash = "0x3750ffa211dab39b4d0711eb27b02b56a17fa9d257ee549baa3110725fd1d41b"  # web3-private-key-ok
     stored_predictions = agent_result_mapping.get_predictions(
         market_address, web3=local_web3
     )
diff --git a/tests_integration_with_local_chain/safe/test_constants.py b/tests_integration_with_local_chain/safe/test_constants.py
index bdc0dc26..c64ccb2d 100644
--- a/tests_integration_with_local_chain/safe/test_constants.py
+++ b/tests_integration_with_local_chain/safe/test_constants.py
@@ -1 +1 @@
-ANVIL_PKEY1 = "0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80"
+ANVIL_PKEY1 = "0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80"  # web3-private-key-ok