diff --git a/Cargo.toml b/Cargo.toml
index b582fce..79245b8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -3,6 +3,7 @@
 name = "geologia"
 version = "0.1.0"
 edition = "2024"
+license = "Apache-2.0"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..1d952ee
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,191 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
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+      form, that is based on (or derived from) the Work and for which the
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+      this License, each Contributor hereby grants to You a perpetual,
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+          stating that You changed the files; and
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+          NOTICE text from the Work, provided that such additional
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+      any Contribution intentionally submitted for inclusion in the Work
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+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
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+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any conditions of TITLE,
+      MERCHANTIBILITY, FITNESS FOR A PARTICULAR PURPOSE, or NONINFRINGEMENT.
+      See the License for the specific language governing permissions and
+      limitations under the License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or exemplary damages of any nature, including but not
+      limited to loss of goodwill, work stoppage, computer failure or
+      malfunction, or any and all other commercial damages or losses, even
+      if such Contributor has been advised of the possibility of such
+      damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may offer such
+      obligations only on Your own behalf and on Your sole responsibility,
+      not on behalf of any other Contributor, and only if You agree to
+      indemnify, defend, and hold each Contributor harmless for any
+      liability incurred by, or claims asserted against, such Contributor
+      by reason of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
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+      comment syntax for the syntax of the file format. Please also
+      include a link to the license for the legal completeness.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/README.md b/README.md
index 3b8471e..d34c1e6 100644
--- a/README.md
+++ b/README.md
@@ -68,3 +68,7 @@ async fn run() -> Result<(), Box<dyn std::error::Error>> {
     Ok(())
 }
 ```
+
+## License
+
+This project is licensed under the [Apache License 2.0](LICENSE).
diff --git a/examples/function-call.rs b/examples/function-call.rs
index e7dd1ae..50f9316 100644
--- a/examples/function-call.rs
+++ b/examples/function-call.rs
@@ -1,3 +1,6 @@
+// Copyright 2026 Andre Cipriani Bandarra
+// SPDX-License-Identifier: Apache-2.0
+
 use std::{env, error::Error};
 
 use geologia::prelude::{
diff --git a/examples/generate-content-stream.rs b/examples/generate-content-stream.rs
index cab1788..2bc51a8 100644
--- a/examples/generate-content-stream.rs
+++ b/examples/generate-content-stream.rs
@@ -1,3 +1,6 @@
+// Copyright 2026 Andre Cipriani Bandarra
+// SPDX-License-Identifier: Apache-2.0
+
 use std::{env, error::Error};
 
 use geologia::prelude::{Content, GeminiClient, GenerateContentRequest, Role};
diff --git a/examples/generate-content.rs b/examples/generate-content.rs
index 3bcb9a4..a7a0a4b 100644
--- a/examples/generate-content.rs
+++ b/examples/generate-content.rs
@@ -1,3 +1,6 @@
+// Copyright 2026 Andre Cipriani Bandarra
+// SPDX-License-Identifier: Apache-2.0
+
 use std::{env, error::Error};
 
 use geologia::prelude::{Content, GeminiClient, GenerateContentRequest, Role};
diff --git a/examples/generate-image.rs b/examples/generate-image.rs
index 6cc9854..5df0a20 100644
--- a/examples/generate-image.rs
+++ b/examples/generate-image.rs
@@ -1,3 +1,6 @@
+// Copyright 2026 Andre Cipriani Bandarra
+// SPDX-License-Identifier: Apache-2.0
+
 use std::{env, error::Error, io::Cursor};
 
 use geologia::prelude::{
diff --git a/examples/raw_sse.rs b/examples/raw_sse.rs
index dd2ef48..9aa4947 100644
--- a/examples/raw_sse.rs
+++ b/examples/raw_sse.rs
@@ -1,3 +1,6 @@
+// Copyright 2026 Andre Cipriani Bandarra
+// SPDX-License-Identifier: Apache-2.0
+
 use std::env;
 
 use geologia::{
diff --git a/src/client.rs b/src/client.rs
index 05701de..75690c7 100644
--- a/src/client.rs
+++ b/src/client.rs
@@ -1,3 +1,6 @@
+// Copyright 2026 Andre Cipriani Bandarra
+// SPDX-License-Identifier: Apache-2.0
+
 use crate::error::{Error as GeminiError, Result as GeminiResult};
 use crate::network::event_source::{EventSource, ServerSentEvent};
 use crate::prelude::*;
diff --git a/src/error.rs b/src/error.rs
index 30f1e15..6204b8b 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -1,3 +1,6 @@
+// Copyright 2026 Andre Cipriani Bandarra
+// SPDX-License-Identifier: Apache-2.0
+
 //! Error types for the Google Gemini client.
 
 use std::fmt::Display;
diff --git a/src/lib.rs b/src/lib.rs
index 9e5204c..7bd7fc7 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,3 +1,6 @@
+// Copyright 2026 Andre Cipriani Bandarra
+// SPDX-License-Identifier: Apache-2.0
+
 //! Async Rust client for the Google Gemini API.
 //!
 //! This crate provides a high-level async client for interacting with Google's Gemini
diff --git a/src/network/event_source.rs b/src/network/event_source.rs
index 4e74f78..0b0490c 100644
--- a/src/network/event_source.rs
+++ b/src/network/event_source.rs
@@ -1,3 +1,6 @@
+// Copyright 2026 Andre Cipriani Bandarra
+// SPDX-License-Identifier: Apache-2.0
+
 //! Server-Sent Events (SSE) decoder for streaming HTTP responses.
 //!
 //! Implements a [`tokio_util::codec::Decoder`] that parses an SSE byte stream into
diff --git a/src/network/mod.rs b/src/network/mod.rs
index 5ac91d2..270cbf2 100644
--- a/src/network/mod.rs
+++ b/src/network/mod.rs
@@ -1,3 +1,6 @@
+// Copyright 2026 Andre Cipriani Bandarra
+// SPDX-License-Identifier: Apache-2.0
+
 //! Networking utilities for streaming HTTP responses.
 
 pub mod event_source;
diff --git a/src/types/common.rs b/src/types/common.rs
index ed3f1b8..941f460 100644
--- a/src/types/common.rs
+++ b/src/types/common.rs
@@ -1,3 +1,6 @@
+// Copyright 2026 Andre Cipriani Bandarra
+// SPDX-License-Identifier: Apache-2.0
+
 use std::{fmt::Display, str::FromStr, vec};
 
 use serde::{Deserialize, Serialize};
diff --git a/src/types/count_tokens.rs b/src/types/count_tokens.rs
index 31cb4a0..b90a261 100644
--- a/src/types/count_tokens.rs
+++ b/src/types/count_tokens.rs
@@ -1,3 +1,6 @@
+// Copyright 2026 Andre Cipriani Bandarra
+// SPDX-License-Identifier: Apache-2.0
+
 use serde::{Deserialize, Serialize};
 
 use crate::error::{Error, Result};
diff --git a/src/types/error.rs b/src/types/error.rs
index 9c30c77..03cae8c 100644
--- a/src/types/error.rs
+++ b/src/types/error.rs
@@ -1,3 +1,6 @@
+// Copyright 2026 Andre Cipriani Bandarra
+// SPDX-License-Identifier: Apache-2.0
+
 use std::fmt::Formatter;
 
 use serde::{Deserialize, Serialize};
diff --git a/src/types/generate_content.rs b/src/types/generate_content.rs
index 9d733c9..a5fc999 100644
--- a/src/types/generate_content.rs
+++ b/src/types/generate_content.rs
@@ -1,3 +1,6 @@
+// Copyright 2026 Andre Cipriani Bandarra
+// SPDX-License-Identifier: Apache-2.0
+
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
 
diff --git a/src/types/mod.rs b/src/types/mod.rs
index 24ab35f..9814e40 100644
--- a/src/types/mod.rs
+++ b/src/types/mod.rs
@@ -1,3 +1,6 @@
+// Copyright 2026 Andre Cipriani Bandarra
+// SPDX-License-Identifier: Apache-2.0
+
 //! Request and response types for the Gemini API.
 
 mod common;
diff --git a/src/types/predict_image.rs b/src/types/predict_image.rs
index 4e15087..1ba55ed 100644
--- a/src/types/predict_image.rs
+++ b/src/types/predict_image.rs
@@ -1,3 +1,6 @@
+// Copyright 2026 Andre Cipriani Bandarra
+// SPDX-License-Identifier: Apache-2.0
+
 use serde::{Deserialize, Serialize};
 use serde_with::base64::Base64;
 use serde_with::serde_as;
diff --git a/src/types/text_embeddings.rs b/src/types/text_embeddings.rs
index a4cf9db..72071e9 100644
--- a/src/types/text_embeddings.rs
+++ b/src/types/text_embeddings.rs
@@ -1,3 +1,6 @@
+// Copyright 2026 Andre Cipriani Bandarra
+// SPDX-License-Identifier: Apache-2.0
+
 use serde::{Deserialize, Serialize};
 
 use crate::error::{Error, Result};