diff --git a/ruma-api-macros/src/api.rs b/ruma-api-macros/src/api.rs
index 69fc1d51..b05e8476 100644
--- a/ruma-api-macros/src/api.rs
+++ b/ruma-api-macros/src/api.rs
@@ -267,12 +267,14 @@ pub fn expand_all(api: Api) -> syn::Result<TokenStream> {
                 quote! {
                     #( #attrs )*
                     #[automatically_derived]
+                    #[cfg(feature = "client")]
                     impl #request_lifetimes #ruma_api::OutgoingNonAuthRequest
                         for Request #request_lifetimes
                         {}
 
                     #( #attrs )*
                     #[automatically_derived]
+                    #[cfg(feature = "server")]
                     impl #ruma_api::IncomingNonAuthRequest for #incoming_request_type {}
                 }
             }
@@ -287,6 +289,7 @@ pub fn expand_all(api: Api) -> syn::Result<TokenStream> {
         #response_type
 
         #[automatically_derived]
+        #[cfg(feature = "server")]
         impl ::std::convert::TryFrom<Response> for #http::Response<Vec<u8>> {
             type Error = #ruma_api::error::IntoHttpError;
 
@@ -308,6 +311,7 @@ pub fn expand_all(api: Api) -> syn::Result<TokenStream> {
         }
 
         #[automatically_derived]
+        #[cfg(feature = "client")]
         impl ::std::convert::TryFrom<#http::Response<Vec<u8>>> for Response {
             type Error = #ruma_api::error::FromHttpResponseError<#error>;
 
@@ -344,6 +348,7 @@ pub fn expand_all(api: Api) -> syn::Result<TokenStream> {
         };
 
         #[automatically_derived]
+        #[cfg(feature = "client")]
         impl #request_lifetimes #ruma_api::OutgoingRequest for Request #request_lifetimes {
             type EndpointError = #error;
             type IncomingResponse = <Response as #ruma_serde::Outgoing>::Incoming;
@@ -386,6 +391,7 @@ pub fn expand_all(api: Api) -> syn::Result<TokenStream> {
         }
 
         #[automatically_derived]
+        #[cfg(feature = "server")]
         impl #ruma_api::IncomingRequest for #incoming_request_type {
             type EndpointError = #error;
             type OutgoingResponse = Response;
diff --git a/ruma-api/Cargo.toml b/ruma-api/Cargo.toml
index 6912a215..11087bee 100644
--- a/ruma-api/Cargo.toml
+++ b/ruma-api/Cargo.toml
@@ -31,3 +31,9 @@ thiserror = "1.0.23"
 [dev-dependencies]
 ruma-events = { version = "=0.22.0-alpha.2", path = "../ruma-events" }
 trybuild = "1.0.38"
+
+# These feature gates exist as a workaround to pass tests.
+# Any crate that invokes the `ruma-api!` macro should include these features.
+[features]
+client = []
+server = []
diff --git a/ruma-api/tests/conversions.rs b/ruma-api/tests/conversions.rs
index 69e6307f..da4ae27b 100644
--- a/ruma-api/tests/conversions.rs
+++ b/ruma-api/tests/conversions.rs
@@ -34,6 +34,7 @@ ruma_api! {
     }
 }
 
+#[cfg(all(feature = "client", feature = "server"))]
 #[test]
 fn request_serde() -> Result<(), Box<dyn std::error::Error + 'static>> {
     let req = Request {
diff --git a/ruma-api/tests/header_override.rs b/ruma-api/tests/header_override.rs
index b96b8a07..d55b4efa 100644
--- a/ruma-api/tests/header_override.rs
+++ b/ruma-api/tests/header_override.rs
@@ -27,6 +27,7 @@ ruma_api! {
     }
 }
 
+#[cfg(all(feature = "client", feature = "server"))]
 #[test]
 fn response_content_type_override() {
     let res = Response { stuff: "magic".into() };
@@ -44,6 +45,7 @@ fn response_content_type_override() {
     assert_eq!(http_res.headers().get("content-type").unwrap(), "magic");
 }
 
+#[cfg(feature = "client")]
 #[test]
 fn request_content_type_override() {
     let req = Request { location: None, stuff: "magic".into() };
diff --git a/ruma-api/tests/no_fields.rs b/ruma-api/tests/no_fields.rs
index f09a85bb..fd9b831c 100644
--- a/ruma-api/tests/no_fields.rs
+++ b/ruma-api/tests/no_fields.rs
@@ -16,6 +16,7 @@ ruma_api! {
     response: {}
 }
 
+#[cfg(feature = "client")]
 #[test]
 fn empty_request_http_repr() {
     let req = Request {};
@@ -24,6 +25,7 @@ fn empty_request_http_repr() {
     assert!(http_req.body().is_empty());
 }
 
+#[cfg(feature = "server")]
 #[test]
 fn empty_response_http_repr() {
     let res = Response {};
diff --git a/ruma-appservice-api/Cargo.toml b/ruma-appservice-api/Cargo.toml
index a3141a9d..405a0358 100644
--- a/ruma-appservice-api/Cargo.toml
+++ b/ruma-appservice-api/Cargo.toml
@@ -22,6 +22,8 @@ serde_json = "1.0.61"
 
 [features]
 unstable-exhaustive-types = []
+client = []
+server = []
 
 [dev-dependencies]
 matches = "0.1.8"
diff --git a/ruma-appservice-api/src/event/push_events/v1.rs b/ruma-appservice-api/src/event/push_events/v1.rs
index d16e52ff..f0a584c3 100644
--- a/ruma-appservice-api/src/event/push_events/v1.rs
+++ b/ruma-appservice-api/src/event/push_events/v1.rs
@@ -43,6 +43,7 @@ impl Response {
     }
 }
 
+#[cfg(feature = "server")]
 #[cfg(test)]
 mod tests {
     use ruma_api::{exports::http, OutgoingRequest};
diff --git a/ruma-client-api/Cargo.toml b/ruma-client-api/Cargo.toml
index e08c005c..89f27f5f 100644
--- a/ruma-client-api/Cargo.toml
+++ b/ruma-client-api/Cargo.toml
@@ -38,3 +38,5 @@ compat = []
 unstable-exhaustive-types = []
 unstable-pre-spec = []
 unstable-synapse-quirks = []
+client = []
+server = []
diff --git a/ruma-client-api/src/r0/message/send_message_event.rs b/ruma-client-api/src/r0/message/send_message_event.rs
index 5f14e98a..b443261d 100644
--- a/ruma-client-api/src/r0/message/send_message_event.rs
+++ b/ruma-client-api/src/r0/message/send_message_event.rs
@@ -75,6 +75,7 @@ struct ResponseBody {
     event_id: EventId,
 }
 
+#[cfg(feature = "server")]
 impl TryFrom<Response> for http::Response<Vec<u8>> {
     type Error = IntoHttpError;
 
@@ -88,6 +89,7 @@ impl TryFrom<Response> for http::Response<Vec<u8>> {
     }
 }
 
+#[cfg(feature = "client")]
 impl TryFrom<http::Response<Vec<u8>>> for Response {
     type Error = FromHttpResponseError<crate::Error>;
 
@@ -109,6 +111,7 @@ impl TryFrom<http::Response<Vec<u8>>> for Response {
     }
 }
 
+#[cfg(feature = "client")]
 impl<'a> ruma_api::OutgoingRequest for Request<'a> {
     type EndpointError = crate::Error;
     type IncomingResponse = Response;
@@ -152,6 +155,7 @@ impl<'a> ruma_api::OutgoingRequest for Request<'a> {
     }
 }
 
+#[cfg(feature = "server")]
 impl ruma_api::IncomingRequest for IncomingRequest {
     type EndpointError = crate::Error;
     type OutgoingResponse = Response;
diff --git a/ruma-client-api/src/r0/state/send_state_event_for_empty_key.rs b/ruma-client-api/src/r0/state/send_state_event_for_empty_key.rs
index c2532be8..bc5c9dfb 100644
--- a/ruma-client-api/src/r0/state/send_state_event_for_empty_key.rs
+++ b/ruma-client-api/src/r0/state/send_state_event_for_empty_key.rs
@@ -68,6 +68,7 @@ struct ResponseBody {
     event_id: EventId,
 }
 
+#[cfg(feature = "server")]
 impl TryFrom<Response> for http::Response<Vec<u8>> {
     type Error = IntoHttpError;
 
@@ -81,6 +82,7 @@ impl TryFrom<Response> for http::Response<Vec<u8>> {
     }
 }
 
+#[cfg(feature = "client")]
 impl TryFrom<http::Response<Vec<u8>>> for Response {
     type Error = FromHttpResponseError<crate::Error>;
 
@@ -102,6 +104,7 @@ impl TryFrom<http::Response<Vec<u8>>> for Response {
     }
 }
 
+#[cfg(feature = "client")]
 impl<'a> ruma_api::OutgoingRequest for Request<'a> {
     type EndpointError = crate::Error;
     type IncomingResponse = Response;
@@ -144,6 +147,7 @@ impl<'a> ruma_api::OutgoingRequest for Request<'a> {
     }
 }
 
+#[cfg(feature = "server")]
 impl ruma_api::IncomingRequest for IncomingRequest {
     type EndpointError = crate::Error;
     type OutgoingResponse = Response;
diff --git a/ruma-client-api/src/r0/state/send_state_event_for_key.rs b/ruma-client-api/src/r0/state/send_state_event_for_key.rs
index a374f3d9..a5eb6142 100644
--- a/ruma-client-api/src/r0/state/send_state_event_for_key.rs
+++ b/ruma-client-api/src/r0/state/send_state_event_for_key.rs
@@ -71,6 +71,7 @@ struct ResponseBody {
     event_id: EventId,
 }
 
+#[cfg(feature = "server")]
 impl TryFrom<Response> for http::Response<Vec<u8>> {
     type Error = IntoHttpError;
 
@@ -84,6 +85,7 @@ impl TryFrom<Response> for http::Response<Vec<u8>> {
     }
 }
 
+#[cfg(feature = "client")]
 impl TryFrom<http::Response<Vec<u8>>> for Response {
     type Error = FromHttpResponseError<crate::Error>;
 
@@ -105,6 +107,7 @@ impl TryFrom<http::Response<Vec<u8>>> for Response {
     }
 }
 
+#[cfg(feature = "client")]
 impl<'a> ruma_api::OutgoingRequest for Request<'a> {
     type EndpointError = crate::Error;
     type IncomingResponse = Response;
@@ -148,6 +151,7 @@ impl<'a> ruma_api::OutgoingRequest for Request<'a> {
     }
 }
 
+#[cfg(feature = "server")]
 impl ruma_api::IncomingRequest for IncomingRequest {
     type EndpointError = crate::Error;
     type OutgoingResponse = Response;
diff --git a/ruma-federation-api/Cargo.toml b/ruma-federation-api/Cargo.toml
index 5f033aee..e09a4474 100644
--- a/ruma-federation-api/Cargo.toml
+++ b/ruma-federation-api/Cargo.toml
@@ -30,3 +30,5 @@ matches = "0.1.8"
 [features]
 unstable-exhaustive-types = []
 unstable-pre-spec = []
+client = []
+server = []
diff --git a/ruma-identity-service-api/Cargo.toml b/ruma-identity-service-api/Cargo.toml
index 8f3d902a..ad252b5a 100644
--- a/ruma-identity-service-api/Cargo.toml
+++ b/ruma-identity-service-api/Cargo.toml
@@ -20,3 +20,5 @@ serde_json = "1.0.61"
 
 [features]
 unstable-exhaustive-types = []
+client = []
+server = []
diff --git a/ruma-push-gateway-api/Cargo.toml b/ruma-push-gateway-api/Cargo.toml
index a39a35e8..04583584 100644
--- a/ruma-push-gateway-api/Cargo.toml
+++ b/ruma-push-gateway-api/Cargo.toml
@@ -22,3 +22,5 @@ serde_json = "1.0.61"
 
 [features]
 unstable-exhaustive-types = []
+client = []
+server = []
diff --git a/ruma/Cargo.toml b/ruma/Cargo.toml
index 7fd40d1f..094e949d 100644
--- a/ruma/Cargo.toml
+++ b/ruma/Cargo.toml
@@ -41,11 +41,25 @@ api = ["ruma-api"]
 events = ["ruma-events"]
 signatures = ["ruma-signatures"]
 
-appservice-api = ["api", "events", "ruma-appservice-api"]
-client-api = ["api", "events", "ruma-client-api"]
-federation-api = ["api", "signatures", "ruma-federation-api"]
-identity-service-api = ["api", "ruma-identity-service-api"]
-push-gateway-api = ["api", "ruma-push-gateway-api"]
+appservice-api-c = ["api", "events", "ruma-appservice-api/client"]
+appservice-api-s = ["api", "events", "ruma-appservice-api/server"]
+appservice-api = ["appservice-api-c", "appservice-api-s"]
+
+client-api-c = ["api", "events", "ruma-client-api/client"]
+client-api-s = ["api", "events", "ruma-client-api/server"]
+client-api = ["client-api-c", "client-api-s"]
+
+federation-api-c = ["api", "signatures", "ruma-federation-api/client"]
+federation-api-s = ["api", "signatures", "ruma-federation-api/server"]
+federation-api = ["federation-api-c", "federation-api-s"]
+
+identity-service-api-c = ["api", "ruma-identity-service-api/client"]
+identity-service-api-s = ["api", "ruma-identity-service-api/server"]
+identity-service-api = ["identity-service-api-c", "identity-service-api-s"]
+
+push-gateway-api-c = ["api", "ruma-push-gateway-api/client"]
+push-gateway-api-s = ["api", "ruma-push-gateway-api/server"]
+push-gateway-api = ["push-gateway-api-c", "push-gateway-api-s"]
 
 # Convenience features
 either = ["ruma-identifiers/either"]