diff --git a/config/example.okx.toml b/config/example.okx.toml
new file mode 100644
index 0000000..e9b866e
--- /dev/null
+++ b/config/example.okx.toml
@@ -0,0 +1,28 @@
+node-url = "http://localhost:8545"
+
+[dex]
+# See here how to get a free key: https://0x.org/docs/introduction/getting-started
+api-key = "$YOUR_API_KEY"
+
+# Specify which chain to use, 1 for Ethereum.
+# More info here: https://www.okx.com/en-au/web3/build/docs/waas/walletapi-resources-supported-networks
+chain-id = "1"
+
+# Optionally specify a custom OKX Swap API endpoint
+# endpoint = "https://www.okx.com/api/v5/dex/aggregator/swap"
+
+# OKX Project ID. Instruction on how to create project:
+# https://www.okx.com/en-au/web3/build/docs/waas/introduction-to-developer-portal-interface#create-project
+api-project-id = "$OKX_PROJECT_ID"
+
+# OKX API Key. Instruction on how to generate API key:
+# https://www.okx.com/en-au/web3/build/docs/waas/introduction-to-developer-portal-interface#generate-api-keys
+api-key = "$OKX_API_KEY"
+
+# OKX Secret key used for signing request. Instruction on how to get security token:
+# https://www.okx.com/en-au/web3/build/docs/waas/introduction-to-developer-portal-interface#view-the-secret-key
+api-secret-key = "$OKX_SECRET_KEY"
+
+# OKX Secret key passphrase. Instruction on how to get passhprase:
+# https://www.okx.com/en-au/web3/build/docs/waas/introduction-to-developer-portal-interface#generate-api-keys
+api-passphrase = "$OKX_PASSPHRASE"
diff --git a/src/infra/config/dex/okx/file.rs b/src/infra/config/dex/okx/file.rs
index d7a3f53..ad5b27f 100644
--- a/src/infra/config/dex/okx/file.rs
+++ b/src/infra/config/dex/okx/file.rs
@@ -13,7 +13,7 @@ use {
 #[derive(Deserialize)]
 #[serde(rename_all = "kebab-case", deny_unknown_fields)]
 struct Config {
-    /// The versioned URL endpoint for the 0x swap API.
+    /// The versioned URL endpoint for the OKX swap API.
     #[serde(default = "default_endpoint")]
     #[serde_as(as = "serde_with::DisplayFromStr")]
     endpoint: reqwest::Url,
@@ -22,19 +22,44 @@ struct Config {
     #[serde_as(as = "serialize::ChainId")]
     chain_id: eth::ChainId,
 
-    /// OKX Project ID.
+    /// OKX API credentials
+    #[serde(flatten)]
+    okx_credentials: OkxCredentialsConfig,
+}
+
+#[derive(Deserialize)]
+#[serde(rename_all = "kebab-case", deny_unknown_fields)]
+struct OkxCredentialsConfig {
+    /// OKX Project ID. Instruction on how to create project:
+    /// https://www.okx.com/en-au/web3/build/docs/waas/introduction-to-developer-portal-interface#create-project
     api_project_id: String,
 
-    /// OKX API Key.
+    /// OKX API Key. Instruction on how to generate API key:
+    /// https://www.okx.com/en-au/web3/build/docs/waas/introduction-to-developer-portal-interface#generate-api-keys
     api_key: String,
 
-    /// OKX Secret key used for signing request.
+    /// OKX Secret key used for signing request. Instruction on how to get
+    /// security token: https://www.okx.com/en-au/web3/build/docs/waas/introduction-to-developer-portal-interface#view-the-secret-key
     api_secret_key: String,
 
-    /// OKX Secret key passphrase.
+    /// OKX Secret key passphrase. Instruction on how
+    /// to get passhprase: https://www.okx.com/en-au/web3/build/docs/waas/introduction-to-developer-portal-interface#generate-api-keys
     api_passphrase: String,
 }
 
+// Implementing Into<> is enough as opposite conversion will never be used.
+#[allow(clippy::from_over_into)]
+impl Into<okx::OkxCredentialsConfig> for OkxCredentialsConfig {
+    fn into(self) -> okx::OkxCredentialsConfig {
+        okx::OkxCredentialsConfig {
+            project_id: self.api_project_id,
+            api_key: self.api_key,
+            api_secret_key: self.api_secret_key,
+            api_passphrase: self.api_passphrase,
+        }
+    }
+}
+
 fn default_endpoint() -> reqwest::Url {
     "https://www.okx.com/api/v5/dex/aggregator/swap"
         .parse()
@@ -53,12 +78,7 @@ pub async fn load(path: &Path) -> super::Config {
         okx: okx::Config {
             endpoint: config.endpoint,
             chain_id: config.chain_id,
-            okx_credentials: okx::OkxCredentialsConfig {
-                project_id: config.api_project_id,
-                api_key: config.api_key,
-                api_secret_key: config.api_secret_key,
-                api_passphrase: config.api_passphrase,
-            },
+            okx_credentials: config.okx_credentials.into(),
             block_stream: base.block_stream.clone(),
         },
         base,
diff --git a/src/infra/dex/okx/mod.rs b/src/infra/dex/okx/mod.rs
index 0d1bc04..dd9232a 100644
--- a/src/infra/dex/okx/mod.rs
+++ b/src/infra/dex/okx/mod.rs
@@ -37,20 +37,16 @@ pub struct Config {
 }
 
 pub struct OkxCredentialsConfig {
-    /// OKX project ID to use. Instruction on how to create project:
-    /// https://www.okx.com/en-au/web3/build/docs/waas/introduction-to-developer-portal-interface#create-project
+    /// OKX project ID to use.
     pub project_id: String,
 
-    /// OKX API key. Instruction on how to generate API key:
-    /// https://www.okx.com/en-au/web3/build/docs/waas/introduction-to-developer-portal-interface#generate-api-keys
+    /// OKX API key.
     pub api_key: String,
 
-    /// OKX API key additional security token. Instruction on how to get
-    /// security token: https://www.okx.com/en-au/web3/build/docs/waas/introduction-to-developer-portal-interface#view-the-secret-key
+    /// OKX API key additional security token.
     pub api_secret_key: String,
 
-    /// OKX API key passphrase used to encrypt secrety key. Instruction on how
-    /// to get passhprase: https://www.okx.com/en-au/web3/build/docs/waas/introduction-to-developer-portal-interface#generate-api-keys
+    /// OKX API key passphrase used to encrypt secrety key.
     pub api_passphrase: String,
 }
 
diff --git a/src/tests/okx/mod.rs b/src/tests/okx/mod.rs
index ff928ef..463c98f 100644
--- a/src/tests/okx/mod.rs
+++ b/src/tests/okx/mod.rs
@@ -14,7 +14,7 @@ endpoint = 'http://{solver_addr}'
 api-project-id = '1'
 api-key = '1234'
 api-secret-key = '1234567890123456'
-api-passphrase ='pass'
+api-passphrase = 'pass'
 ",
     ))
 }