diff --git a/client/src/client.rs b/client/src/client.rs
index edb71e30..3072f74b 100644
--- a/client/src/client.rs
+++ b/client/src/client.rs
@@ -1081,6 +1081,17 @@ pub trait RpcApi: Sized {
         self.call("sendrawtransaction", &[tx.raw_hex().into()])
     }
 
+    /// Submit a package of raw transactions to the node. The package will be
+    /// validated according to consensus and mempool policy rules. If all
+    /// transactions pass, they will be accepted to mempool.
+    /// 
+    /// This RPC is experimental and the interface may be unstable.
+    fn submit_package<R: RawTx>(&self, rawtxs: &[R]) -> Result<json::SubmitPackageResult> {
+        let hexes: Vec<serde_json::Value> =
+            rawtxs.to_vec().into_iter().map(|r| r.raw_hex().into()).collect();
+        self.call("submitpackage", &[hexes.into()])
+    }
+
     fn estimate_smart_fee(
         &self,
         conf_target: u16,
diff --git a/json/src/lib.rs b/json/src/lib.rs
index f6b13675..82bb849f 100644
--- a/json/src/lib.rs
+++ b/json/src/lib.rs
@@ -845,6 +845,51 @@ pub struct TestMempoolAcceptResult {
     pub fees: Option<TestMempoolAcceptResultFees>,
 }
 
+#[derive(Clone, PartialEq, Eq, Debug, Deserialize, Serialize)]
+pub struct Fees {
+    /// Transaction fee.
+    #[serde(with = "bitcoin::amount::serde::as_btc")]
+    pub base: Amount,
+
+    /// If the transaction was not already in the mempool, the effective feerate
+    /// in BTC per KvB. For example, the package feerate and/or feerate with
+    /// modified fees from prioritisetransaction.
+    #[serde(default, rename = "effective-feerate", with = "bitcoin::amount::serde::as_btc::opt")]
+    pub effective_feerate: Option<Amount>,
+
+    /// If effective-feerate is provided, the wtxids of the transactions whose
+    /// fees and vsizes are included in effective-feerate.
+    #[serde(rename = "effective-includes")]
+    pub effective_includes: Option<Vec<bitcoin::Wtxid>>,
+}
+
+#[derive(Clone, PartialEq, Eq, Debug, Deserialize, Serialize)]
+pub struct TxResult {
+    pub txid: bitcoin::Txid,
+
+    /// The wtxid of a different transaction with the same txid but different
+    /// witness found in the mempool. This means the submitted transaction was
+    /// ignored.
+    #[serde(rename = "other-wtxid")]
+    pub other_wtxid: Option<bitcoin::Wtxid>,
+
+    /// Virtual transaction size as defined in BIP 141.
+    pub vsize: u64,
+
+    pub fees: Fees,
+}
+
+#[derive(Clone, PartialEq, Eq, Debug, Deserialize, Serialize)]
+pub struct SubmitPackageResult {
+    /// Transaction results keyed by wtxid.
+    #[serde(rename = "tx-results")]
+    pub tx_results: HashMap<bitcoin::Wtxid, TxResult>,
+
+    /// List of txids of replaced transactions.
+    #[serde(rename = "replaced-transactions")]
+    pub replaced_transactions: Vec<bitcoin::Txid>,
+}
+
 #[derive(Clone, PartialEq, Eq, Debug, Deserialize, Serialize)]
 pub struct TestMempoolAcceptResultFees {
     /// Transaction fee in BTC