diff --git a/ruma-client-api/src/r0/state/send_state_event.rs b/ruma-client-api/src/r0/state/send_state_event.rs
index 550029d7..bc668028 100644
--- a/ruma-client-api/src/r0/state/send_state_event.rs
+++ b/ruma-client-api/src/r0/state/send_state_event.rs
@@ -1,9 +1,10 @@
 //! [PUT /_matrix/client/r0/rooms/{roomId}/state/{eventType}/{stateKey}](https://matrix.org/docs/spec/client_server/r0.6.1#put-matrix-client-r0-rooms-roomid-state-eventtype-statekey)
 
-use ruma_api::ruma_api;
+use bytes::BufMut;
+use ruma_api::{ruma_api, SendAccessToken};
 use ruma_events::{AnyStateEventContent, EventContent as _};
 use ruma_identifiers::{EventId, RoomId};
-use ruma_serde::Raw;
+use ruma_serde::{Outgoing, Raw};
 
 ruma_api! {
     metadata: {
@@ -15,24 +16,6 @@ ruma_api! {
         authentication: AccessToken,
     }
 
-    request: {
-        /// The room to set the state in.
-        #[ruma_api(path)]
-        pub room_id: &'a RoomId,
-
-        /// The type of event to send.
-        #[ruma_api(path)]
-        pub event_type: &'a str,
-
-        /// The state_key for the state to send.
-        #[ruma_api(path)]
-        pub state_key: &'a str,
-
-        /// The event content to send.
-        #[ruma_api(body)]
-        pub body: Raw<AnyStateEventContent>,
-    }
-
     response: {
         /// A unique identifier for the event.
         pub event_id: EventId,
@@ -41,6 +24,26 @@ ruma_api! {
     error: crate::Error
 }
 
+/// Data for a request to the `send_state_event` API endpoint.
+///
+/// Send a state event to a room associated with a given state key.
+#[derive(Clone, Debug, Outgoing)]
+#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
+#[incoming_derive(!Deserialize)]
+pub struct Request<'a> {
+    /// The room to set the state in.
+    pub room_id: &'a RoomId,
+
+    /// The type of event to send.
+    pub event_type: &'a str,
+
+    /// The state_key for the state to send.
+    pub state_key: &'a str,
+
+    /// The event content to send.
+    pub body: Raw<AnyStateEventContent>,
+}
+
 impl<'a> Request<'a> {
     /// Creates a new `Request` with the given room id, state key and event content.
     pub fn new(room_id: &'a RoomId, state_key: &'a str, content: &'a AnyStateEventContent) -> Self {
@@ -64,3 +67,91 @@ impl Response {
         Self { event_id }
     }
 }
+
+#[cfg(feature = "client")]
+impl<'a> ruma_api::OutgoingRequest for Request<'a> {
+    type EndpointError = crate::Error;
+    type IncomingResponse = Response;
+
+    const METADATA: ruma_api::Metadata = METADATA;
+
+    fn try_into_http_request<T: Default + BufMut>(
+        self,
+        base_url: &str,
+        access_token: SendAccessToken<'_>,
+    ) -> Result<http::Request<T>, ruma_api::error::IntoHttpError> {
+        use std::borrow::Cow;
+
+        use http::header::{self, HeaderValue};
+        use percent_encoding::{utf8_percent_encode, NON_ALPHANUMERIC};
+
+        let mut url = format!(
+            "{}/_matrix/client/r0/rooms/{}/state/{}",
+            base_url.strip_suffix('/').unwrap_or(base_url),
+            utf8_percent_encode(self.room_id.as_str(), NON_ALPHANUMERIC),
+            utf8_percent_encode(self.event_type, NON_ALPHANUMERIC),
+        );
+
+        // Last URL segment is optional, that is why this trait impl is not generated.
+        if !self.state_key.is_empty() {
+            url.push('/');
+            url.push_str(&Cow::from(utf8_percent_encode(&self.state_key, NON_ALPHANUMERIC)));
+        }
+
+        let http_request = http::Request::builder()
+            .method(http::Method::PUT)
+            .uri(url)
+            .header(header::CONTENT_TYPE, "application/json")
+            .header(
+                header::AUTHORIZATION,
+                HeaderValue::from_str(&format!(
+                    "Bearer {}",
+                    access_token
+                        .get_required_for_endpoint()
+                        .ok_or(ruma_api::error::IntoHttpError::NeedsAuthentication)?
+                ))?,
+            )
+            .body(ruma_serde::json_to_buf(&self.body)?)?;
+
+        Ok(http_request)
+    }
+}
+
+#[cfg(feature = "server")]
+impl ruma_api::IncomingRequest for IncomingRequest {
+    type EndpointError = crate::Error;
+    type OutgoingResponse = Response;
+
+    const METADATA: ruma_api::Metadata = METADATA;
+
+    fn try_from_http_request<T: AsRef<[u8]>>(
+        request: http::Request<T>,
+    ) -> Result<Self, ruma_api::error::FromHttpRequestError> {
+        use std::{borrow::Cow, convert::TryFrom};
+
+        let path_segments: Vec<&str> = request.uri().path()[1..].split('/').collect();
+
+        let room_id = {
+            let decoded =
+                percent_encoding::percent_decode(path_segments[4].as_bytes()).decode_utf8()?;
+
+            RoomId::try_from(&*decoded)?
+        };
+
+        let event_type = percent_encoding::percent_decode(path_segments[6].as_bytes())
+            .decode_utf8()?
+            .into_owned();
+
+        let state_key = path_segments
+            .get(7)
+            .map(|segment| percent_encoding::percent_decode(segment.as_bytes()).decode_utf8())
+            .transpose()?
+            // Last URL segment is optional, but not present is the same semantically as empty
+            .unwrap_or(Cow::Borrowed(""))
+            .into_owned();
+
+        let body = serde_json::from_slice(request.body().as_ref())?;
+
+        Ok(Self { room_id, event_type, state_key, body })
+    }
+}