diff --git a/bolt-cli/build.rs b/bolt-cli/build.rs
index 1028e01e7..07c7d4466 100644
--- a/bolt-cli/build.rs
+++ b/bolt-cli/build.rs
@@ -10,7 +10,7 @@ fn main() -> io::Result<()> {
     }
 
     tonic_build::configure().build_client(true).out_dir(PB_OUT_DIR).compile_protos(
-        &["proto/eth2-signer-api/v1/lister.proto"],
+        &["proto/eth2-signer-api/v1/lister.proto", "proto/eth2-signer-api/v1/signer.proto"],
         &["proto/eth2-signer-api/v1/", "proto/eth2-signer-api/"],
     )
 }
diff --git a/bolt-cli/src/pb/mod.rs b/bolt-cli/src/pb/mod.rs
index 1522b52ff..435dccf78 100644
--- a/bolt-cli/src/pb/mod.rs
+++ b/bolt-cli/src/pb/mod.rs
@@ -1,7 +1,12 @@
-pub mod v1;
+mod v1;
 
-#[allow(unused_imports)]
-pub use v1::{
-    lister_client::ListerClient, Account, DistributedAccount, ListAccountsRequest,
-    ListAccountsResponse, ResponseState,
-};
+/// Re-exported protobuf API for the ETH2 remote signer service.
+pub mod eth2_signer_api {
+
+    #[allow(unused_imports)]
+    pub use super::v1::{
+        lister_client::ListerClient, sign_request::Id as SignRequestId,
+        signer_client::SignerClient, Account, DistributedAccount, ListAccountsRequest,
+        ListAccountsResponse, ResponseState, SignRequest, SignResponse,
+    };
+}
diff --git a/bolt-cli/src/pb/v1.rs b/bolt-cli/src/pb/v1.rs
index 673b29588..a4e1e7a81 100644
--- a/bolt-cli/src/pb/v1.rs
+++ b/bolt-cli/src/pb/v1.rs
@@ -376,3 +376,693 @@ pub mod lister_server {
         const NAME: &'static str = SERVICE_NAME;
     }
 }
+/// AttestationData is defined at <https://github.com/ethereum/eth2.0-specs/blob/dev/specs/phase0/beacon-chain.md#attestationdata>
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct AttestationData {
+    #[prost(uint64, tag = "1")]
+    pub slot: u64,
+    #[prost(uint64, tag = "2")]
+    pub committee_index: u64,
+    #[prost(bytes = "vec", tag = "3")]
+    pub beacon_block_root: ::prost::alloc::vec::Vec<u8>,
+    #[prost(message, optional, tag = "4")]
+    pub source: ::core::option::Option<Checkpoint>,
+    #[prost(message, optional, tag = "5")]
+    pub target: ::core::option::Option<Checkpoint>,
+}
+/// Checkpoint is defined at <https://github.com/ethereum/eth2.0-specs/blob/dev/specs/phase0/beacon-chain.md#checkpoint>
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct Checkpoint {
+    #[prost(uint64, tag = "1")]
+    pub epoch: u64,
+    #[prost(bytes = "vec", tag = "2")]
+    pub root: ::prost::alloc::vec::Vec<u8>,
+}
+/// BeaconBlockheader is defined at <https://github.com/ethereum/eth2.0-specs/blob/dev/specs/phase0/beacon-chain.md#beaconblockheader>
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct BeaconBlockHeader {
+    #[prost(uint64, tag = "1")]
+    pub slot: u64,
+    #[prost(uint64, tag = "2")]
+    pub proposer_index: u64,
+    #[prost(bytes = "vec", tag = "3")]
+    pub parent_root: ::prost::alloc::vec::Vec<u8>,
+    #[prost(bytes = "vec", tag = "4")]
+    pub state_root: ::prost::alloc::vec::Vec<u8>,
+    #[prost(bytes = "vec", tag = "5")]
+    pub body_root: ::prost::alloc::vec::Vec<u8>,
+}
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct SignRequest {
+    #[prost(bytes = "vec", tag = "3")]
+    pub data: ::prost::alloc::vec::Vec<u8>,
+    #[prost(bytes = "vec", tag = "4")]
+    pub domain: ::prost::alloc::vec::Vec<u8>,
+    #[prost(oneof = "sign_request::Id", tags = "1, 2")]
+    pub id: ::core::option::Option<sign_request::Id>,
+}
+/// Nested message and enum types in `SignRequest`.
+pub mod sign_request {
+    #[derive(Clone, PartialEq, ::prost::Oneof)]
+    pub enum Id {
+        #[prost(bytes, tag = "1")]
+        PublicKey(::prost::alloc::vec::Vec<u8>),
+        #[prost(string, tag = "2")]
+        Account(::prost::alloc::string::String),
+    }
+}
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct MultisignRequest {
+    #[prost(message, repeated, tag = "1")]
+    pub requests: ::prost::alloc::vec::Vec<SignRequest>,
+}
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct SignBeaconAttestationRequest {
+    #[prost(bytes = "vec", tag = "3")]
+    pub domain: ::prost::alloc::vec::Vec<u8>,
+    #[prost(message, optional, tag = "4")]
+    pub data: ::core::option::Option<AttestationData>,
+    #[prost(oneof = "sign_beacon_attestation_request::Id", tags = "1, 2")]
+    pub id: ::core::option::Option<sign_beacon_attestation_request::Id>,
+}
+/// Nested message and enum types in `SignBeaconAttestationRequest`.
+pub mod sign_beacon_attestation_request {
+    #[derive(Clone, PartialEq, ::prost::Oneof)]
+    pub enum Id {
+        #[prost(bytes, tag = "1")]
+        PublicKey(::prost::alloc::vec::Vec<u8>),
+        #[prost(string, tag = "2")]
+        Account(::prost::alloc::string::String),
+    }
+}
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct SignBeaconAttestationsRequest {
+    #[prost(message, repeated, tag = "1")]
+    pub requests: ::prost::alloc::vec::Vec<SignBeaconAttestationRequest>,
+}
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct SignBeaconProposalRequest {
+    #[prost(bytes = "vec", tag = "3")]
+    pub domain: ::prost::alloc::vec::Vec<u8>,
+    #[prost(message, optional, tag = "4")]
+    pub data: ::core::option::Option<BeaconBlockHeader>,
+    #[prost(oneof = "sign_beacon_proposal_request::Id", tags = "1, 2")]
+    pub id: ::core::option::Option<sign_beacon_proposal_request::Id>,
+}
+/// Nested message and enum types in `SignBeaconProposalRequest`.
+pub mod sign_beacon_proposal_request {
+    #[derive(Clone, PartialEq, ::prost::Oneof)]
+    pub enum Id {
+        #[prost(bytes, tag = "1")]
+        PublicKey(::prost::alloc::vec::Vec<u8>),
+        #[prost(string, tag = "2")]
+        Account(::prost::alloc::string::String),
+    }
+}
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct SignResponse {
+    #[prost(enumeration = "ResponseState", tag = "1")]
+    pub state: i32,
+    #[prost(bytes = "vec", tag = "2")]
+    pub signature: ::prost::alloc::vec::Vec<u8>,
+}
+#[derive(Clone, PartialEq, ::prost::Message)]
+pub struct MultisignResponse {
+    #[prost(message, repeated, tag = "1")]
+    pub responses: ::prost::alloc::vec::Vec<SignResponse>,
+}
+/// Generated client implementations.
+pub mod signer_client {
+    #![allow(
+        unused_variables,
+        dead_code,
+        missing_docs,
+        clippy::wildcard_imports,
+        clippy::let_unit_value,
+    )]
+    use tonic::codegen::*;
+    use tonic::codegen::http::Uri;
+    #[derive(Debug, Clone)]
+    pub struct SignerClient<T> {
+        inner: tonic::client::Grpc<T>,
+    }
+    impl SignerClient<tonic::transport::Channel> {
+        /// Attempt to create a new client by connecting to a given endpoint.
+        pub async fn connect<D>(dst: D) -> Result<Self, tonic::transport::Error>
+        where
+            D: TryInto<tonic::transport::Endpoint>,
+            D::Error: Into<StdError>,
+        {
+            let conn = tonic::transport::Endpoint::new(dst)?.connect().await?;
+            Ok(Self::new(conn))
+        }
+    }
+    impl<T> SignerClient<T>
+    where
+        T: tonic::client::GrpcService<tonic::body::BoxBody>,
+        T::Error: Into<StdError>,
+        T::ResponseBody: Body<Data = Bytes> + std::marker::Send + 'static,
+        <T::ResponseBody as Body>::Error: Into<StdError> + std::marker::Send,
+    {
+        pub fn new(inner: T) -> Self {
+            let inner = tonic::client::Grpc::new(inner);
+            Self { inner }
+        }
+        pub fn with_origin(inner: T, origin: Uri) -> Self {
+            let inner = tonic::client::Grpc::with_origin(inner, origin);
+            Self { inner }
+        }
+        pub fn with_interceptor<F>(
+            inner: T,
+            interceptor: F,
+        ) -> SignerClient<InterceptedService<T, F>>
+        where
+            F: tonic::service::Interceptor,
+            T::ResponseBody: Default,
+            T: tonic::codegen::Service<
+                http::Request<tonic::body::BoxBody>,
+                Response = http::Response<
+                    <T as tonic::client::GrpcService<tonic::body::BoxBody>>::ResponseBody,
+                >,
+            >,
+            <T as tonic::codegen::Service<
+                http::Request<tonic::body::BoxBody>,
+            >>::Error: Into<StdError> + std::marker::Send + std::marker::Sync,
+        {
+            SignerClient::new(InterceptedService::new(inner, interceptor))
+        }
+        /// Compress requests with the given encoding.
+        ///
+        /// This requires the server to support it otherwise it might respond with an
+        /// error.
+        #[must_use]
+        pub fn send_compressed(mut self, encoding: CompressionEncoding) -> Self {
+            self.inner = self.inner.send_compressed(encoding);
+            self
+        }
+        /// Enable decompressing responses.
+        #[must_use]
+        pub fn accept_compressed(mut self, encoding: CompressionEncoding) -> Self {
+            self.inner = self.inner.accept_compressed(encoding);
+            self
+        }
+        /// Limits the maximum size of a decoded message.
+        ///
+        /// Default: `4MB`
+        #[must_use]
+        pub fn max_decoding_message_size(mut self, limit: usize) -> Self {
+            self.inner = self.inner.max_decoding_message_size(limit);
+            self
+        }
+        /// Limits the maximum size of an encoded message.
+        ///
+        /// Default: `usize::MAX`
+        #[must_use]
+        pub fn max_encoding_message_size(mut self, limit: usize) -> Self {
+            self.inner = self.inner.max_encoding_message_size(limit);
+            self
+        }
+        pub async fn sign(
+            &mut self,
+            request: impl tonic::IntoRequest<super::SignRequest>,
+        ) -> std::result::Result<tonic::Response<super::SignResponse>, tonic::Status> {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::unknown(
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static("/v1.Signer/Sign");
+            let mut req = request.into_request();
+            req.extensions_mut().insert(GrpcMethod::new("v1.Signer", "Sign"));
+            self.inner.unary(req, path, codec).await
+        }
+        pub async fn multisign(
+            &mut self,
+            request: impl tonic::IntoRequest<super::MultisignRequest>,
+        ) -> std::result::Result<
+            tonic::Response<super::MultisignResponse>,
+            tonic::Status,
+        > {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::unknown(
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static("/v1.Signer/Multisign");
+            let mut req = request.into_request();
+            req.extensions_mut().insert(GrpcMethod::new("v1.Signer", "Multisign"));
+            self.inner.unary(req, path, codec).await
+        }
+        pub async fn sign_beacon_attestation(
+            &mut self,
+            request: impl tonic::IntoRequest<super::SignBeaconAttestationRequest>,
+        ) -> std::result::Result<tonic::Response<super::SignResponse>, tonic::Status> {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::unknown(
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/v1.Signer/SignBeaconAttestation",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut()
+                .insert(GrpcMethod::new("v1.Signer", "SignBeaconAttestation"));
+            self.inner.unary(req, path, codec).await
+        }
+        pub async fn sign_beacon_attestations(
+            &mut self,
+            request: impl tonic::IntoRequest<super::SignBeaconAttestationsRequest>,
+        ) -> std::result::Result<
+            tonic::Response<super::MultisignResponse>,
+            tonic::Status,
+        > {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::unknown(
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/v1.Signer/SignBeaconAttestations",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut()
+                .insert(GrpcMethod::new("v1.Signer", "SignBeaconAttestations"));
+            self.inner.unary(req, path, codec).await
+        }
+        pub async fn sign_beacon_proposal(
+            &mut self,
+            request: impl tonic::IntoRequest<super::SignBeaconProposalRequest>,
+        ) -> std::result::Result<tonic::Response<super::SignResponse>, tonic::Status> {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::unknown(
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic::codec::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/v1.Signer/SignBeaconProposal",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut()
+                .insert(GrpcMethod::new("v1.Signer", "SignBeaconProposal"));
+            self.inner.unary(req, path, codec).await
+        }
+    }
+}
+/// Generated server implementations.
+pub mod signer_server {
+    #![allow(
+        unused_variables,
+        dead_code,
+        missing_docs,
+        clippy::wildcard_imports,
+        clippy::let_unit_value,
+    )]
+    use tonic::codegen::*;
+    /// Generated trait containing gRPC methods that should be implemented for use with SignerServer.
+    #[async_trait]
+    pub trait Signer: std::marker::Send + std::marker::Sync + 'static {
+        async fn sign(
+            &self,
+            request: tonic::Request<super::SignRequest>,
+        ) -> std::result::Result<tonic::Response<super::SignResponse>, tonic::Status>;
+        async fn multisign(
+            &self,
+            request: tonic::Request<super::MultisignRequest>,
+        ) -> std::result::Result<
+            tonic::Response<super::MultisignResponse>,
+            tonic::Status,
+        >;
+        async fn sign_beacon_attestation(
+            &self,
+            request: tonic::Request<super::SignBeaconAttestationRequest>,
+        ) -> std::result::Result<tonic::Response<super::SignResponse>, tonic::Status>;
+        async fn sign_beacon_attestations(
+            &self,
+            request: tonic::Request<super::SignBeaconAttestationsRequest>,
+        ) -> std::result::Result<
+            tonic::Response<super::MultisignResponse>,
+            tonic::Status,
+        >;
+        async fn sign_beacon_proposal(
+            &self,
+            request: tonic::Request<super::SignBeaconProposalRequest>,
+        ) -> std::result::Result<tonic::Response<super::SignResponse>, tonic::Status>;
+    }
+    #[derive(Debug)]
+    pub struct SignerServer<T> {
+        inner: Arc<T>,
+        accept_compression_encodings: EnabledCompressionEncodings,
+        send_compression_encodings: EnabledCompressionEncodings,
+        max_decoding_message_size: Option<usize>,
+        max_encoding_message_size: Option<usize>,
+    }
+    impl<T> SignerServer<T> {
+        pub fn new(inner: T) -> Self {
+            Self::from_arc(Arc::new(inner))
+        }
+        pub fn from_arc(inner: Arc<T>) -> Self {
+            Self {
+                inner,
+                accept_compression_encodings: Default::default(),
+                send_compression_encodings: Default::default(),
+                max_decoding_message_size: None,
+                max_encoding_message_size: None,
+            }
+        }
+        pub fn with_interceptor<F>(
+            inner: T,
+            interceptor: F,
+        ) -> InterceptedService<Self, F>
+        where
+            F: tonic::service::Interceptor,
+        {
+            InterceptedService::new(Self::new(inner), interceptor)
+        }
+        /// Enable decompressing requests with the given encoding.
+        #[must_use]
+        pub fn accept_compressed(mut self, encoding: CompressionEncoding) -> Self {
+            self.accept_compression_encodings.enable(encoding);
+            self
+        }
+        /// Compress responses with the given encoding, if the client supports it.
+        #[must_use]
+        pub fn send_compressed(mut self, encoding: CompressionEncoding) -> Self {
+            self.send_compression_encodings.enable(encoding);
+            self
+        }
+        /// Limits the maximum size of a decoded message.
+        ///
+        /// Default: `4MB`
+        #[must_use]
+        pub fn max_decoding_message_size(mut self, limit: usize) -> Self {
+            self.max_decoding_message_size = Some(limit);
+            self
+        }
+        /// Limits the maximum size of an encoded message.
+        ///
+        /// Default: `usize::MAX`
+        #[must_use]
+        pub fn max_encoding_message_size(mut self, limit: usize) -> Self {
+            self.max_encoding_message_size = Some(limit);
+            self
+        }
+    }
+    impl<T, B> tonic::codegen::Service<http::Request<B>> for SignerServer<T>
+    where
+        T: Signer,
+        B: Body + std::marker::Send + 'static,
+        B::Error: Into<StdError> + std::marker::Send + 'static,
+    {
+        type Response = http::Response<tonic::body::BoxBody>;
+        type Error = std::convert::Infallible;
+        type Future = BoxFuture<Self::Response, Self::Error>;
+        fn poll_ready(
+            &mut self,
+            _cx: &mut Context<'_>,
+        ) -> Poll<std::result::Result<(), Self::Error>> {
+            Poll::Ready(Ok(()))
+        }
+        fn call(&mut self, req: http::Request<B>) -> Self::Future {
+            match req.uri().path() {
+                "/v1.Signer/Sign" => {
+                    #[allow(non_camel_case_types)]
+                    struct SignSvc<T: Signer>(pub Arc<T>);
+                    impl<T: Signer> tonic::server::UnaryService<super::SignRequest>
+                    for SignSvc<T> {
+                        type Response = super::SignResponse;
+                        type Future = BoxFuture<
+                            tonic::Response<Self::Response>,
+                            tonic::Status,
+                        >;
+                        fn call(
+                            &mut self,
+                            request: tonic::Request<super::SignRequest>,
+                        ) -> Self::Future {
+                            let inner = Arc::clone(&self.0);
+                            let fut = async move {
+                                <T as Signer>::sign(&inner, request).await
+                            };
+                            Box::pin(fut)
+                        }
+                    }
+                    let accept_compression_encodings = self.accept_compression_encodings;
+                    let send_compression_encodings = self.send_compression_encodings;
+                    let max_decoding_message_size = self.max_decoding_message_size;
+                    let max_encoding_message_size = self.max_encoding_message_size;
+                    let inner = self.inner.clone();
+                    let fut = async move {
+                        let method = SignSvc(inner);
+                        let codec = tonic::codec::ProstCodec::default();
+                        let mut grpc = tonic::server::Grpc::new(codec)
+                            .apply_compression_config(
+                                accept_compression_encodings,
+                                send_compression_encodings,
+                            )
+                            .apply_max_message_size_config(
+                                max_decoding_message_size,
+                                max_encoding_message_size,
+                            );
+                        let res = grpc.unary(method, req).await;
+                        Ok(res)
+                    };
+                    Box::pin(fut)
+                }
+                "/v1.Signer/Multisign" => {
+                    #[allow(non_camel_case_types)]
+                    struct MultisignSvc<T: Signer>(pub Arc<T>);
+                    impl<T: Signer> tonic::server::UnaryService<super::MultisignRequest>
+                    for MultisignSvc<T> {
+                        type Response = super::MultisignResponse;
+                        type Future = BoxFuture<
+                            tonic::Response<Self::Response>,
+                            tonic::Status,
+                        >;
+                        fn call(
+                            &mut self,
+                            request: tonic::Request<super::MultisignRequest>,
+                        ) -> Self::Future {
+                            let inner = Arc::clone(&self.0);
+                            let fut = async move {
+                                <T as Signer>::multisign(&inner, request).await
+                            };
+                            Box::pin(fut)
+                        }
+                    }
+                    let accept_compression_encodings = self.accept_compression_encodings;
+                    let send_compression_encodings = self.send_compression_encodings;
+                    let max_decoding_message_size = self.max_decoding_message_size;
+                    let max_encoding_message_size = self.max_encoding_message_size;
+                    let inner = self.inner.clone();
+                    let fut = async move {
+                        let method = MultisignSvc(inner);
+                        let codec = tonic::codec::ProstCodec::default();
+                        let mut grpc = tonic::server::Grpc::new(codec)
+                            .apply_compression_config(
+                                accept_compression_encodings,
+                                send_compression_encodings,
+                            )
+                            .apply_max_message_size_config(
+                                max_decoding_message_size,
+                                max_encoding_message_size,
+                            );
+                        let res = grpc.unary(method, req).await;
+                        Ok(res)
+                    };
+                    Box::pin(fut)
+                }
+                "/v1.Signer/SignBeaconAttestation" => {
+                    #[allow(non_camel_case_types)]
+                    struct SignBeaconAttestationSvc<T: Signer>(pub Arc<T>);
+                    impl<
+                        T: Signer,
+                    > tonic::server::UnaryService<super::SignBeaconAttestationRequest>
+                    for SignBeaconAttestationSvc<T> {
+                        type Response = super::SignResponse;
+                        type Future = BoxFuture<
+                            tonic::Response<Self::Response>,
+                            tonic::Status,
+                        >;
+                        fn call(
+                            &mut self,
+                            request: tonic::Request<super::SignBeaconAttestationRequest>,
+                        ) -> Self::Future {
+                            let inner = Arc::clone(&self.0);
+                            let fut = async move {
+                                <T as Signer>::sign_beacon_attestation(&inner, request)
+                                    .await
+                            };
+                            Box::pin(fut)
+                        }
+                    }
+                    let accept_compression_encodings = self.accept_compression_encodings;
+                    let send_compression_encodings = self.send_compression_encodings;
+                    let max_decoding_message_size = self.max_decoding_message_size;
+                    let max_encoding_message_size = self.max_encoding_message_size;
+                    let inner = self.inner.clone();
+                    let fut = async move {
+                        let method = SignBeaconAttestationSvc(inner);
+                        let codec = tonic::codec::ProstCodec::default();
+                        let mut grpc = tonic::server::Grpc::new(codec)
+                            .apply_compression_config(
+                                accept_compression_encodings,
+                                send_compression_encodings,
+                            )
+                            .apply_max_message_size_config(
+                                max_decoding_message_size,
+                                max_encoding_message_size,
+                            );
+                        let res = grpc.unary(method, req).await;
+                        Ok(res)
+                    };
+                    Box::pin(fut)
+                }
+                "/v1.Signer/SignBeaconAttestations" => {
+                    #[allow(non_camel_case_types)]
+                    struct SignBeaconAttestationsSvc<T: Signer>(pub Arc<T>);
+                    impl<
+                        T: Signer,
+                    > tonic::server::UnaryService<super::SignBeaconAttestationsRequest>
+                    for SignBeaconAttestationsSvc<T> {
+                        type Response = super::MultisignResponse;
+                        type Future = BoxFuture<
+                            tonic::Response<Self::Response>,
+                            tonic::Status,
+                        >;
+                        fn call(
+                            &mut self,
+                            request: tonic::Request<super::SignBeaconAttestationsRequest>,
+                        ) -> Self::Future {
+                            let inner = Arc::clone(&self.0);
+                            let fut = async move {
+                                <T as Signer>::sign_beacon_attestations(&inner, request)
+                                    .await
+                            };
+                            Box::pin(fut)
+                        }
+                    }
+                    let accept_compression_encodings = self.accept_compression_encodings;
+                    let send_compression_encodings = self.send_compression_encodings;
+                    let max_decoding_message_size = self.max_decoding_message_size;
+                    let max_encoding_message_size = self.max_encoding_message_size;
+                    let inner = self.inner.clone();
+                    let fut = async move {
+                        let method = SignBeaconAttestationsSvc(inner);
+                        let codec = tonic::codec::ProstCodec::default();
+                        let mut grpc = tonic::server::Grpc::new(codec)
+                            .apply_compression_config(
+                                accept_compression_encodings,
+                                send_compression_encodings,
+                            )
+                            .apply_max_message_size_config(
+                                max_decoding_message_size,
+                                max_encoding_message_size,
+                            );
+                        let res = grpc.unary(method, req).await;
+                        Ok(res)
+                    };
+                    Box::pin(fut)
+                }
+                "/v1.Signer/SignBeaconProposal" => {
+                    #[allow(non_camel_case_types)]
+                    struct SignBeaconProposalSvc<T: Signer>(pub Arc<T>);
+                    impl<
+                        T: Signer,
+                    > tonic::server::UnaryService<super::SignBeaconProposalRequest>
+                    for SignBeaconProposalSvc<T> {
+                        type Response = super::SignResponse;
+                        type Future = BoxFuture<
+                            tonic::Response<Self::Response>,
+                            tonic::Status,
+                        >;
+                        fn call(
+                            &mut self,
+                            request: tonic::Request<super::SignBeaconProposalRequest>,
+                        ) -> Self::Future {
+                            let inner = Arc::clone(&self.0);
+                            let fut = async move {
+                                <T as Signer>::sign_beacon_proposal(&inner, request).await
+                            };
+                            Box::pin(fut)
+                        }
+                    }
+                    let accept_compression_encodings = self.accept_compression_encodings;
+                    let send_compression_encodings = self.send_compression_encodings;
+                    let max_decoding_message_size = self.max_decoding_message_size;
+                    let max_encoding_message_size = self.max_encoding_message_size;
+                    let inner = self.inner.clone();
+                    let fut = async move {
+                        let method = SignBeaconProposalSvc(inner);
+                        let codec = tonic::codec::ProstCodec::default();
+                        let mut grpc = tonic::server::Grpc::new(codec)
+                            .apply_compression_config(
+                                accept_compression_encodings,
+                                send_compression_encodings,
+                            )
+                            .apply_max_message_size_config(
+                                max_decoding_message_size,
+                                max_encoding_message_size,
+                            );
+                        let res = grpc.unary(method, req).await;
+                        Ok(res)
+                    };
+                    Box::pin(fut)
+                }
+                _ => {
+                    Box::pin(async move {
+                        let mut response = http::Response::new(empty_body());
+                        let headers = response.headers_mut();
+                        headers
+                            .insert(
+                                tonic::Status::GRPC_STATUS,
+                                (tonic::Code::Unimplemented as i32).into(),
+                            );
+                        headers
+                            .insert(
+                                http::header::CONTENT_TYPE,
+                                tonic::metadata::GRPC_CONTENT_TYPE,
+                            );
+                        Ok(response)
+                    })
+                }
+            }
+        }
+    }
+    impl<T> Clone for SignerServer<T> {
+        fn clone(&self) -> Self {
+            let inner = self.inner.clone();
+            Self {
+                inner,
+                accept_compression_encodings: self.accept_compression_encodings,
+                send_compression_encodings: self.send_compression_encodings,
+                max_decoding_message_size: self.max_decoding_message_size,
+                max_encoding_message_size: self.max_encoding_message_size,
+            }
+        }
+    }
+    /// Generated gRPC service name
+    pub const SERVICE_NAME: &str = "v1.Signer";
+    impl<T> tonic::server::NamedService for SignerServer<T> {
+        const NAME: &'static str = SERVICE_NAME;
+    }
+}
diff --git a/bolt-cli/src/pubkeys.rs b/bolt-cli/src/pubkeys.rs
index 78ee7e962..c06eef8de 100644
--- a/bolt-cli/src/pubkeys.rs
+++ b/bolt-cli/src/pubkeys.rs
@@ -3,7 +3,7 @@ use eyre::Result;
 use lighthouse_eth2_keystore::Keystore;
 
 use crate::{
-    pb::Account,
+    pb::eth2_signer_api::Account,
     utils::keystore::{keystore_paths, KeystoreError, KeystoreSecret},
 };
 
diff --git a/bolt-cli/src/utils/dirk.rs b/bolt-cli/src/utils/dirk.rs
index f93048879..52f38df9c 100644
--- a/bolt-cli/src/utils/dirk.rs
+++ b/bolt-cli/src/utils/dirk.rs
@@ -1,11 +1,15 @@
 use std::fs;
 
+use alloy_primitives::B256;
+use ethereum_consensus::crypto::bls::{PublicKey as BlsPublicKey, Signature as BlsSignature};
 use eyre::{Context, Result};
 use tonic::transport::{Certificate, Channel, ClientTlsConfig, Identity};
 
 use crate::{
     cli::TlsCredentials,
-    pb::{Account, ListAccountsRequest, ListerClient},
+    pb::eth2_signer_api::{
+        Account, ListAccountsRequest, ListerClient, SignRequest, SignRequestId, SignerClient,
+    },
 };
 
 /// A Dirk remote signer.
@@ -33,6 +37,28 @@ impl Dirk {
 
         Ok(accs.into_inner().accounts)
     }
+
+    /// Request a signature from the remote signer.
+    pub async fn request_signature(
+        &self,
+        pubkey: BlsPublicKey,
+        hash: B256,
+        domain: B256,
+    ) -> Result<BlsSignature> {
+        let mut signer = SignerClient::new(self.conn.clone());
+
+        let req = SignRequest {
+            data: hash.to_vec(),
+            domain: domain.to_vec(),
+            id: Some(SignRequestId::PublicKey(pubkey.to_vec())),
+        };
+
+        let res = signer.sign(req).await?;
+        let sig = res.into_inner().signature;
+        let sig = BlsSignature::try_from(sig.as_slice()).wrap_err("Failed to parse signature")?;
+
+        Ok(sig)
+    }
 }
 
 /// Compose the TLS credentials from the given paths.