diff --git a/.github/workflows/rust.yaml b/.github/workflows/rust.yaml
index 7407ecb..bafbc25 100644
--- a/.github/workflows/rust.yaml
+++ b/.github/workflows/rust.yaml
@@ -178,6 +178,10 @@ jobs:
       matrix:
         feature:
           [
+            "27_1",
+            "27_0",
+            "26_2",
+            "26_1",
             "26_0",
             "25_2",
             "25_1",
diff --git a/client/src/client_sync/mod.rs b/client/src/client_sync/mod.rs
index ca9decf..f24b2e4 100644
--- a/client/src/client_sync/mod.rs
+++ b/client/src/client_sync/mod.rs
@@ -13,6 +13,7 @@ pub mod v23;
 pub mod v24;
 pub mod v25;
 pub mod v26;
+pub mod v27;
 
 use std::fs::File;
 use std::io::{BufRead, BufReader};
diff --git a/client/src/client_sync/v26.rs b/client/src/client_sync/v26.rs
index 4e1199f..eb15e42 100644
--- a/client/src/client_sync/v26.rs
+++ b/client/src/client_sync/v26.rs
@@ -26,7 +26,7 @@ crate::impl_client_v17__generatetoaddress!();
 
 // == Network ==
 crate::impl_client_v17__getnetworkinfo!();
-crate::impl_client_check_expected_server_version!({ [260000] });
+crate::impl_client_check_expected_server_version!({ [260000, 260100, 260200] });
 
 // == Rawtransactions ==
 crate::impl_client_v17__sendrawtransaction!();
diff --git a/client/src/client_sync/v27.rs b/client/src/client_sync/v27.rs
new file mode 100644
index 0000000..9657d75
--- /dev/null
+++ b/client/src/client_sync/v27.rs
@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: CC0-1.0
+
+//! A JSON-RPC client for testing against Bitcoin Core `v27`.
+//!
+//! We ignore option arguments unless they effect the shape of the returned JSON data.
+
+use bitcoin::address::{Address, NetworkChecked};
+use bitcoin::{Amount, Block, BlockHash, Txid};
+
+use crate::client_sync::{handle_defaults, into_json};
+use crate::json::v27::*;
+
+crate::define_jsonrpc_minreq_client!("v27");
+
+// == Blockchain ==
+crate::impl_client_v17__getblockchaininfo!();
+crate::impl_client_v17__getbestblockhash!();
+crate::impl_client_v17__getblock!();
+crate::impl_client_v17__gettxout!();
+
+// == Control ==
+crate::impl_client_v17__stop!();
+
+// == Generating ==
+crate::impl_client_v17__generatetoaddress!();
+
+// == Network ==
+crate::impl_client_v17__getnetworkinfo!();
+crate::impl_client_check_expected_server_version!({ [270000, 270100] });
+
+// == Rawtransactions ==
+crate::impl_client_v17__sendrawtransaction!();
+
+// == Wallet ==
+crate::impl_client_v17__createwallet!();
+crate::impl_client_v22__unloadwallet!();
+crate::impl_client_v22__loadwallet!();
+crate::impl_client_v17__getbalance!();
+crate::impl_client_v19__getbalances!();
+crate::impl_client_v17__getnewaddress!();
+crate::impl_client_v17__sendtoaddress!();
+crate::impl_client_v17__gettransaction!();
+
+pub use crate::client_sync::v23::AddressType;
diff --git a/contrib/run_bitcoind.sh b/contrib/run_bitcoind.sh
index 81f6728..5d10b21 100755
--- a/contrib/run_bitcoind.sh
+++ b/contrib/run_bitcoind.sh
@@ -23,7 +23,8 @@ COMMAND
    - stop                     Kill all bitcoind nodes using 'pkill bitcoind'.
 
 KNOWN_VERSION
-   - v26                Bitcoin Core v26.0
+   - v27                Bitcoin Core v27.1
+   - v26                Bitcoin Core v26.2
    - v25                Bitcoin Core v25.2
    - v24                Bitcoin Core v24.2
    - v23                Bitcoin Core v23.2
@@ -48,7 +49,8 @@ main() {
 
     case $cmd in
         all)
-            start "v26"         # 26.0
+            start "v27"         # 27.1
+            start "v26"         # 26.2
             start "v25"         # 25.2
             start "v24"         # 24.2
             start "v23"         # 23.2
@@ -82,9 +84,14 @@ start() {
     local version="$1"
 
     case $version in
+        v27)
+            local version_number="27.1"
+            local version_id="271"
+            ;;
+
         v26)
-            local version_number="26.0"
-            local version_id="260"
+            local version_number="26.2"
+            local version_id="262"
             ;;
 
         v25)
diff --git a/integration_test/Cargo.toml b/integration_test/Cargo.toml
index 3b8b80b..4cebd5d 100644
--- a/integration_test/Cargo.toml
+++ b/integration_test/Cargo.toml
@@ -8,11 +8,15 @@ edition = "2021"
 
 # Please note, in this crate the version features are mutally exclusive.
 #
-# - `cargo test --all-features` is the same as `cargo test --features=v26_0`
+# - `cargo test --all-features` is the same as `cargo test --features=v26_2`
 # - `cargo test --no-default-features` skips all tests.
 [features]
 # Enable the same feature in `bitcoind` and the version feature here.
 # All minor releases (but only the latest patch release).
+"27_1" = ["v27", "bitcoind/27_1"]
+"27_0" = ["v27", "bitcoind/27_0"]
+"26_2" = ["v26", "bitcoind/26_2"]
+"26_1" = ["v26", "bitcoind/26_1"]
 "26_0" = ["v26", "bitcoind/26_0"]
 "25_2" = ["v25", "bitcoind/25_2"]
 "25_1" = ["v25", "bitcoind/25_1"]
@@ -33,6 +37,7 @@ edition = "2021"
 "0_17_1" = ["v17", "bitcoind/0_17_1"]
 
 # Each minor version is tested with the same client.
+"v27" = []
 "v26" = []
 "v25" = []
 "v24" = []
diff --git a/integration_test/tests/v26_api.rs b/integration_test/tests/v26_api.rs
index 7848b8a..e81196e 100644
--- a/integration_test/tests/v26_api.rs
+++ b/integration_test/tests/v26_api.rs
@@ -1,4 +1,4 @@
-//! Test the JSON-RPC API against `bitcoind v26.0`.
+//! Test the JSON-RPC API against `bitcoind v26`.
 
 #![cfg(feature = "v26")]
 
diff --git a/integration_test/tests/v27_api.rs b/integration_test/tests/v27_api.rs
new file mode 100644
index 0000000..bc4f2a4
--- /dev/null
+++ b/integration_test/tests/v27_api.rs
@@ -0,0 +1,57 @@
+//! Test the JSON-RPC API against `bitcoind v27.1`.
+
+#![cfg(feature = "v27")]
+
+use integration_test::*;
+
+// == Blockchain ==
+mod blockchain {
+    use super::*;
+
+    impl_test_v17__getblockchaininfo!();
+    impl_test_v17__getbestblockhash!();
+    impl_test_v17__getblock_verbosity_0!();
+    impl_test_v17__getblock_verbosity_1!();
+}
+
+// == Control ==
+mod control {
+    use super::*;
+
+    impl_test_v17__stop!();
+}
+
+// == Generating ==
+mod generating {
+    use super::*;
+
+    impl_test_v17__generatetoaddress!();
+}
+
+// == Network ==
+mod network {
+    use super::*;
+
+    impl_test_v17__getnetworkinfo!();
+}
+
+// == Rawtransactions ==
+mod raw_transactions {
+    use super::*;
+
+    impl_test_v17__sendrawtransaction!();
+}
+
+// == Wallet ==
+mod wallet {
+    use super::*;
+
+    impl_test_v17__createwallet!();
+    impl_test_v17__loadwallet!();
+
+    impl_test_v17__getnewaddress!();
+    impl_test_v17__getbalance!();
+    impl_test_v19__getbalances!();
+    impl_test_v17__sendtoaddress!();
+    impl_test_v17__gettransaction!();
+}
diff --git a/json/src/lib.rs b/json/src/lib.rs
index 343ea75..5e1c758 100644
--- a/json/src/lib.rs
+++ b/json/src/lib.rs
@@ -18,6 +18,7 @@ pub mod v23;
 pub mod v24;
 pub mod v25;
 pub mod v26;
+pub mod v27;
 
 // JSON types that model _all_ `bitcoind` versions.
 pub mod model;
diff --git a/json/src/v27/mod.rs b/json/src/v27/mod.rs
new file mode 100644
index 0000000..bae749a
--- /dev/null
+++ b/json/src/v27/mod.rs
@@ -0,0 +1,195 @@
+// SPDX-License-Identifier: CC0-1.0
+
+//! Structs with standard types.
+//!
+//! These structs model the types returned by the JSON-RPC API and use stdlib types (or custom
+//! types) and are specific to a specific to Bitcoin Core `v27`.
+//!
+//! **== Blockchain ==**
+//! - [ ] `dumptxoutset "path"`
+//! - [x] `getbestblockhash`
+//! - [x] `getblock "blockhash" ( verbosity )`
+//! - [x] `getblockchaininfo`
+//! - [ ] `getblockcount`
+//! - [ ] `getblockfilter "blockhash" ( "filtertype" )`
+//! - [ ] `getblockfrompeer "blockhash" peer_id`
+//! - [ ] `getblockhash height`
+//! - [ ] `getblockheader "blockhash" ( verbose )`
+//! - [ ] `getblockstats hash_or_height ( stats )`
+//! - [ ] `getchainstates`
+//! - [ ] `getchaintips`
+//! - [ ] `getchaintxstats ( nblocks "blockhash" )`
+//! - [ ] `getdeploymentinfo ( "blockhash" )`
+//! - [ ] `getdifficulty`
+//! - [ ] `getmempoolancestors "txid" ( verbose )`
+//! - [ ] `getmempooldescendants "txid" ( verbose )`
+//! - [ ] `getmempoolentry "txid"`
+//! - [ ] `getmempoolinfo`
+//! - [ ] `getrawmempool ( verbose mempool_sequence )`
+//! - [ ] `gettxout "txid" n ( include_mempool )`
+//! - [ ] `gettxoutproof ["txid",...] ( "blockhash" )`
+//! - [ ] `gettxoutsetinfo ( "hash_type" hash_or_height use_index )`
+//! - [ ] `gettxspendingprevout [{"txid":"hex","vout":n},...]`
+//! - [ ] `importmempool "filepath" ( options )`
+//! - [ ] `loadtxoutset "path"`
+//! - [ ] `preciousblock "blockhash"`
+//! - [ ] `pruneblockchain height`
+//! - [ ] `savemempool`
+//! - [ ] `scanblocks "action" ( [scanobjects,...] start_height stop_height "filtertype" options )`
+//! - [ ] `scantxoutset "action" ( [scanobjects,...] )`
+//! - [ ] `verifychain ( checklevel nblocks )`
+//! - [ ] `verifytxoutproof "proof"`
+//!
+//! **== Control ==**
+//! - [ ] `getmemoryinfo ( "mode" )`
+//! - [ ] `getrpcinfo`
+//! - [ ] `help ( "command" )`
+//! - [ ] `logging ( ["include_category",...] ["exclude_category",...] )`
+//! - [x] `stop`
+//! - [ ] `uptime`
+//!
+//! **== Mining ==**
+//! - [ ] `getblocktemplate {"mode":"str","capabilities":["str",...],"rules":["segwit","str",...],"longpollid":"str","data":"hex"}`
+//! - [ ] `getmininginfo`
+//! - [ ] `getnetworkhashps ( nblocks height )`
+//! - [ ] `getprioritisedtransactions`
+//! - [ ] `prioritisetransaction "txid" ( dummy ) fee_delta`
+//! - [ ] `submitblock "hexdata" ( "dummy" )`
+//! - [ ] `submitheader "hexdata"`
+//!
+//! **== Network ==**
+//! - [ ] `addnode "node" "command" ( v2transport )`
+//! - [ ] `clearbanned`
+//! - [ ] `disconnectnode ( "address" nodeid )`
+//! - [ ] `getaddednodeinfo ( "node" )`
+//! - [ ] `getaddrmaninfo`
+//! - [ ] `getconnectioncount`
+//! - [ ] `getnettotals`
+//! - [ ] `getnetworkinfo`
+//! - [ ] `getnodeaddresses ( count "network" )`
+//! - [ ] `getpeerinfo`
+//! - [ ] `listbanned`
+//! - [ ] `ping`
+//! - [ ] `setban "subnet" "command" ( bantime absolute )`
+//! - [ ] `setnetworkactive state`
+//!
+//! **== Rawtransactions ==**
+//! - [ ] `analyzepsbt "psbt"`
+//! - [ ] `combinepsbt ["psbt",...]`
+//! - [ ] `combinerawtransaction ["hexstring",...]`
+//! - [ ] `converttopsbt "hexstring" ( permitsigdata iswitness )`
+//! - [ ] `createpsbt [{"txid":"hex","vout":n,"sequence":n},...] [{"address":amount,...},{"data":"hex"},...] ( locktime replaceable )`
+//! - [ ] `createrawtransaction [{"txid":"hex","vout":n,"sequence":n},...] [{"address":amount,...},{"data":"hex"},...] ( locktime replaceable )`
+//! - [ ] `decodepsbt "psbt"`
+//! - [ ] `decoderawtransaction "hexstring" ( iswitness )`
+//! - [ ] `decodescript "hexstring"`
+//! - [ ] `descriptorprocesspsbt "psbt" ["",{"desc":"str","range":n or [n,n]},...] ( "sighashtype" bip32derivs finalize )`
+//! - [ ] `finalizepsbt "psbt" ( extract )`
+//! - [ ] `fundrawtransaction "hexstring" ( options iswitness )`
+//! - [ ] `getrawtransaction "txid" ( verbosity "blockhash" )`
+//! - [ ] `joinpsbts ["psbt",...]`
+//! - [ ] `sendrawtransaction "hexstring" ( maxfeerate maxburnamount )`
+//! - [ ] `signrawtransactionwithkey "hexstring" ["privatekey",...] ( [{"txid":"hex","vout":n,"scriptPubKey":"hex","redeemScript":"hex","witnessScript":"hex","amount":amount},...] "sighashtype" )`
+//! - [ ] `submitpackage ["rawtx",...]`
+//! - [ ] `testmempoolaccept ["rawtx",...] ( maxfeerate )`
+//! - [ ] `utxoupdatepsbt "psbt" ( ["",{"desc":"str","range":n or [n,n]},...] )`
+//!
+//! **== Signer ==**
+//! - [ ] `enumeratesigners`
+//!
+//! **== Util ==**
+//! - [ ] `createmultisig nrequired ["key",...] ( "address_type" )`
+//! - [ ] `deriveaddresses "descriptor" ( range )`
+//! - [ ] `estimatesmartfee conf_target ( "estimate_mode" )`
+//! - [ ] `getdescriptorinfo "descriptor"`
+//! - [ ] `getindexinfo ( "index_name" )`
+//! - [ ] `signmessagewithprivkey "privkey" "message"`
+//! - [ ] `validateaddress "address"`
+//! - [ ] `verifymessage "address" "signature" "message"`
+//!
+//! **== Wallet ==**
+//! - [ ] `abandontransaction "txid"`
+//! - [ ] `abortrescan`
+//! - [ ] `addmultisigaddress nrequired ["key",...] ( "label" "address_type" )`
+//! - [ ] `backupwallet "destination"`
+//! - [ ] `bumpfee "txid" ( options )`
+//! - [ ] `createwallet "wallet_name" ( disable_private_keys blank "passphrase" avoid_reuse descriptors load_on_startup external_signer )`
+//! - [ ] `dumpprivkey "address"`
+//! - [ ] `dumpwallet "filename"`
+//! - [ ] `encryptwallet "passphrase"`
+//! - [ ] `getaddressesbylabel "label"`
+//! - [ ] `getaddressinfo "address"`
+//! - [x] `getbalance ( "dummy" minconf include_watchonly avoid_reuse )`
+//! - [x] `getbalances`
+//! - [x] `getnewaddress ( "label" "address_type" )`
+//! - [ ] `getrawchangeaddress ( "address_type" )`
+//! - [ ] `getreceivedbyaddress "address" ( minconf include_immature_coinbase )`
+//! - [ ] `getreceivedbylabel "label" ( minconf include_immature_coinbase )`
+//! - [x] `gettransaction "txid" ( include_watchonly verbose )`
+//! - [ ] `getunconfirmedbalance`
+//! - [ ] `getwalletinfo`
+//! - [ ] `importaddress "address" ( "label" rescan p2sh )`
+//! - [ ] `importdescriptors requests`
+//! - [ ] `importmulti requests ( options )`
+//! - [ ] `importprivkey "privkey" ( "label" rescan )`
+//! - [ ] `importprunedfunds "rawtransaction" "txoutproof"`
+//! - [ ] `importpubkey "pubkey" ( "label" rescan )`
+//! - [ ] `importwallet "filename"`
+//! - [ ] `keypoolrefill ( newsize )`
+//! - [ ] `listaddressgroupings`
+//! - [ ] `listdescriptors ( private )`
+//! - [ ] `listlabels ( "purpose" )`
+//! - [ ] `listlockunspent`
+//! - [ ] `listreceivedbyaddress ( minconf include_empty include_watchonly "address_filter" include_immature_coinbase )`
+//! - [ ] `listreceivedbylabel ( minconf include_empty include_watchonly include_immature_coinbase )`
+//! - [ ] `listsinceblock ( "blockhash" target_confirmations include_watchonly include_removed include_change "label" )`
+//! - [ ] `listtransactions ( "label" count skip include_watchonly )`
+//! - [ ] `listunspent ( minconf maxconf ["address",...] include_unsafe query_options )`
+//! - [ ] `listwalletdir`
+//! - [ ] `listwallets`
+//! - [x] `loadwallet "filename" ( load_on_startup )`
+//! - [ ] `lockunspent unlock ( [{"txid":"hex","vout":n},...] persistent )`
+//! - [ ] `migratewallet ( "wallet_name" "passphrase" )`
+//! - [ ] `newkeypool`
+//! - [ ] `psbtbumpfee "txid" ( options )`
+//! - [ ] `removeprunedfunds "txid"`
+//! - [ ] `rescanblockchain ( start_height stop_height )`
+//! - [ ] `restorewallet "wallet_name" "backup_file" ( load_on_startup )`
+//! - [ ] `send [{"address":amount,...},{"data":"hex"},...] ( conf_target "estimate_mode" fee_rate options )`
+//! - [ ] `sendall ["address",{"address":amount,...},...] ( conf_target "estimate_mode" fee_rate options )`
+//! - [ ] `sendmany ( "" ) {"address":amount,...} ( minconf "comment" ["address",...] replaceable conf_target "estimate_mode" fee_rate verbose )`
+//! - [x] `sendtoaddress "address" amount ( "comment" "comment_to" subtractfeefromamount replaceable conf_target "estimate_mode" avoid_reuse fee_rate verbose )`
+//! - [ ] `sethdseed ( newkeypool "seed" )`
+//! - [ ] `setlabel "address" "label"`
+//! - [ ] `settxfee amount`
+//! - [ ] `setwalletflag "flag" ( value )`
+//! - [ ] `signmessage "address" "message"`
+//! - [ ] `signrawtransactionwithwallet "hexstring" ( [{"txid":"hex","vout":n,"scriptPubKey":"hex","redeemScript":"hex","witnessScript":"hex","amount":amount},...] "sighashtype" )`
+//! - [ ] `simulaterawtransaction ( ["rawtx",...] {"include_watchonly":bool,...} )`
+//! - [ ] `unloadwallet ( "wallet_name" load_on_startup )`
+//! - [ ] `upgradewallet ( version )`
+//! - [ ] `walletcreatefundedpsbt ( [{"txid":"hex","vout":n,"sequence":n,"weight":n},...] ) [{"address":amount,...},{"data":"hex"},...] ( locktime options bip32derivs )`
+//! - [ ] `walletdisplayaddress "address"`
+//! - [ ] `walletlock`
+//! - [ ] `walletpassphrase "passphrase" timeout`
+//! - [ ] `walletpassphrasechange "oldpassphrase" "newpassphrase"`
+//! - [ ] `walletprocesspsbt "psbt" ( sign "sighashtype" bip32derivs finalize )`
+//!
+//! **== Zmq ==**
+//! - [ ] `getzmqnotifications`
+
+#[doc(inline)]
+pub use crate::{
+    v17::{
+        GenerateToAddress, GetBalance, GetBestBlockHash, GetBlockVerbosityOne,
+        GetBlockVerbosityZero, GetNetworkInfo, GetNetworkInfoAddress, GetNetworkInfoNetwork,
+        GetNewAddress, GetTransaction, GetTransactionDetail, GetTransactionDetailCategory,
+        GetTxOut, SendRawTransaction,
+    },
+    v19::{
+        Bip9SoftforkInfo, Bip9SoftforkStatistics, Bip9SoftforkStatus, GetBalances, GetBalancesMine,
+        GetBalancesWatchOnly, GetBlockchainInfo, Softfork, SoftforkType,
+    },
+    v22::{SendToAddress, UnloadWallet},
+    v25::{CreateWallet, LoadWallet},
+};
diff --git a/json/src/v27/rpc-api.txt b/json/src/v27/rpc-api.txt
new file mode 100644
index 0000000..6672786
--- /dev/null
+++ b/json/src/v27/rpc-api.txt
@@ -0,0 +1,172 @@
+== Blockchain ==
+dumptxoutset "path"
+getbestblockhash
+getblock "blockhash" ( verbosity )
+getblockchaininfo
+getblockcount
+getblockfilter "blockhash" ( "filtertype" )
+getblockfrompeer "blockhash" peer_id
+getblockhash height
+getblockheader "blockhash" ( verbose )
+getblockstats hash_or_height ( stats )
+getchainstates
+getchaintips
+getchaintxstats ( nblocks "blockhash" )
+getdeploymentinfo ( "blockhash" )
+getdifficulty
+getmempoolancestors "txid" ( verbose )
+getmempooldescendants "txid" ( verbose )
+getmempoolentry "txid"
+getmempoolinfo
+getrawmempool ( verbose mempool_sequence )
+gettxout "txid" n ( include_mempool )
+gettxoutproof ["txid",...] ( "blockhash" )
+gettxoutsetinfo ( "hash_type" hash_or_height use_index )
+gettxspendingprevout [{"txid":"hex","vout":n},...]
+importmempool "filepath" ( options )
+loadtxoutset "path"
+preciousblock "blockhash"
+pruneblockchain height
+savemempool
+scanblocks "action" ( [scanobjects,...] start_height stop_height "filtertype" options )
+scantxoutset "action" ( [scanobjects,...] )
+verifychain ( checklevel nblocks )
+verifytxoutproof "proof"
+
+== Control ==
+getmemoryinfo ( "mode" )
+getrpcinfo
+help ( "command" )
+logging ( ["include_category",...] ["exclude_category",...] )
+stop
+uptime
+
+== Mining ==
+getblocktemplate {"mode":"str","capabilities":["str",...],"rules":["segwit","str",...],"longpollid":"str","data":"hex"}
+getmininginfo
+getnetworkhashps ( nblocks height )
+getprioritisedtransactions
+prioritisetransaction "txid" ( dummy ) fee_delta
+submitblock "hexdata" ( "dummy" )
+submitheader "hexdata"
+
+== Network ==
+addnode "node" "command" ( v2transport )
+clearbanned
+disconnectnode ( "address" nodeid )
+getaddednodeinfo ( "node" )
+getaddrmaninfo
+getconnectioncount
+getnettotals
+getnetworkinfo
+getnodeaddresses ( count "network" )
+getpeerinfo
+listbanned
+ping
+setban "subnet" "command" ( bantime absolute )
+setnetworkactive state
+
+== Rawtransactions ==
+analyzepsbt "psbt"
+combinepsbt ["psbt",...]
+combinerawtransaction ["hexstring",...]
+converttopsbt "hexstring" ( permitsigdata iswitness )
+createpsbt [{"txid":"hex","vout":n,"sequence":n},...] [{"address":amount,...},{"data":"hex"},...] ( locktime replaceable )
+createrawtransaction [{"txid":"hex","vout":n,"sequence":n},...] [{"address":amount,...},{"data":"hex"},...] ( locktime replaceable )
+decodepsbt "psbt"
+decoderawtransaction "hexstring" ( iswitness )
+decodescript "hexstring"
+descriptorprocesspsbt "psbt" ["",{"desc":"str","range":n or [n,n]},...] ( "sighashtype" bip32derivs finalize )
+finalizepsbt "psbt" ( extract )
+fundrawtransaction "hexstring" ( options iswitness )
+getrawtransaction "txid" ( verbosity "blockhash" )
+joinpsbts ["psbt",...]
+sendrawtransaction "hexstring" ( maxfeerate maxburnamount )
+signrawtransactionwithkey "hexstring" ["privatekey",...] ( [{"txid":"hex","vout":n,"scriptPubKey":"hex","redeemScript":"hex","witnessScript":"hex","amount":amount},...] "sighashtype" )
+submitpackage ["rawtx",...]
+testmempoolaccept ["rawtx",...] ( maxfeerate )
+utxoupdatepsbt "psbt" ( ["",{"desc":"str","range":n or [n,n]},...] )
+
+== Signer ==
+enumeratesigners
+
+== Util ==
+createmultisig nrequired ["key",...] ( "address_type" )
+deriveaddresses "descriptor" ( range )
+estimatesmartfee conf_target ( "estimate_mode" )
+getdescriptorinfo "descriptor"
+getindexinfo ( "index_name" )
+signmessagewithprivkey "privkey" "message"
+validateaddress "address"
+verifymessage "address" "signature" "message"
+
+== Wallet ==
+abandontransaction "txid"
+abortrescan
+addmultisigaddress nrequired ["key",...] ( "label" "address_type" )
+backupwallet "destination"
+bumpfee "txid" ( options )
+createwallet "wallet_name" ( disable_private_keys blank "passphrase" avoid_reuse descriptors load_on_startup external_signer )
+dumpprivkey "address"
+dumpwallet "filename"
+encryptwallet "passphrase"
+getaddressesbylabel "label"
+getaddressinfo "address"
+getbalance ( "dummy" minconf include_watchonly avoid_reuse )
+getbalances
+getnewaddress ( "label" "address_type" )
+getrawchangeaddress ( "address_type" )
+getreceivedbyaddress "address" ( minconf include_immature_coinbase )
+getreceivedbylabel "label" ( minconf include_immature_coinbase )
+gettransaction "txid" ( include_watchonly verbose )
+getunconfirmedbalance
+getwalletinfo
+importaddress "address" ( "label" rescan p2sh )
+importdescriptors requests
+importmulti requests ( options )
+importprivkey "privkey" ( "label" rescan )
+importprunedfunds "rawtransaction" "txoutproof"
+importpubkey "pubkey" ( "label" rescan )
+importwallet "filename"
+keypoolrefill ( newsize )
+listaddressgroupings
+listdescriptors ( private )
+listlabels ( "purpose" )
+listlockunspent
+listreceivedbyaddress ( minconf include_empty include_watchonly "address_filter" include_immature_coinbase )
+listreceivedbylabel ( minconf include_empty include_watchonly include_immature_coinbase )
+listsinceblock ( "blockhash" target_confirmations include_watchonly include_removed include_change "label" )
+listtransactions ( "label" count skip include_watchonly )
+listunspent ( minconf maxconf ["address",...] include_unsafe query_options )
+listwalletdir
+listwallets
+loadwallet "filename" ( load_on_startup )
+lockunspent unlock ( [{"txid":"hex","vout":n},...] persistent )
+migratewallet ( "wallet_name" "passphrase" )
+newkeypool
+psbtbumpfee "txid" ( options )
+removeprunedfunds "txid"
+rescanblockchain ( start_height stop_height )
+restorewallet "wallet_name" "backup_file" ( load_on_startup )
+send [{"address":amount,...},{"data":"hex"},...] ( conf_target "estimate_mode" fee_rate options )
+sendall ["address",{"address":amount,...},...] ( conf_target "estimate_mode" fee_rate options )
+sendmany ( "" ) {"address":amount,...} ( minconf "comment" ["address",...] replaceable conf_target "estimate_mode" fee_rate verbose )
+sendtoaddress "address" amount ( "comment" "comment_to" subtractfeefromamount replaceable conf_target "estimate_mode" avoid_reuse fee_rate verbose )
+sethdseed ( newkeypool "seed" )
+setlabel "address" "label"
+settxfee amount
+setwalletflag "flag" ( value )
+signmessage "address" "message"
+signrawtransactionwithwallet "hexstring" ( [{"txid":"hex","vout":n,"scriptPubKey":"hex","redeemScript":"hex","witnessScript":"hex","amount":amount},...] "sighashtype" )
+simulaterawtransaction ( ["rawtx",...] {"include_watchonly":bool,...} )
+unloadwallet ( "wallet_name" load_on_startup )
+upgradewallet ( version )
+walletcreatefundedpsbt ( [{"txid":"hex","vout":n,"sequence":n,"weight":n},...] ) [{"address":amount,...},{"data":"hex"},...] ( locktime options bip32derivs )
+walletdisplayaddress "address"
+walletlock
+walletpassphrase "passphrase" timeout
+walletpassphrasechange "oldpassphrase" "newpassphrase"
+walletprocesspsbt "psbt" ( sign "sighashtype" bip32derivs finalize )
+
+== Zmq ==
+getzmqnotifications
diff --git a/regtest/Cargo.toml b/regtest/Cargo.toml
index 2d3c7c6..7560dd1 100644
--- a/regtest/Cargo.toml
+++ b/regtest/Cargo.toml
@@ -35,13 +35,17 @@ anyhow = "1.0.66"
 
 # Please note, in this crate the version features are mutally exclusive.
 #
-# - `cargo test --all-features` is the same as `cargo test --features=v26_0`
-# - `cargo test --no-default-features` uses `v26_0` also.
+# - `cargo test --all-features` is the same as `cargo test --features=v27_1`
+# - `cargo test --no-default-features` uses `v27_1` also.
 [features]
 # download is not supposed to be used directly only through selecting one of the version feature
 "download" = ["bitcoin_hashes", "flate2", "tar", "minreq", "zip"]
 
 # We support all minor releases (but only the latest patch release).
+"27_1" = ["download", "27_0"]
+"27_0" = ["download", "26_2"]
+"26_2" = ["download", "26_1"]
+"26_1" = ["download", "26_0"]
 "26_0" = ["download", "25_2"]
 "25_2" = ["download", "25_1"]
 "25_1" = ["download", "25_0"]
@@ -65,7 +69,7 @@ anyhow = "1.0.66"
 
 
 [package.metadata.docs.rs]
-features = ["download", "doc", "26_0"]
+features = ["download", "doc", "26_2"]
 rustdoc-args = ["--cfg", "docsrs"]
 
 [patch.crates-io.bitcoind-json-rpc-client]
diff --git a/regtest/sha256/bitcoin-core-26.1-SHA256SUMS b/regtest/sha256/bitcoin-core-26.1-SHA256SUMS
new file mode 100644
index 0000000..2880aec
--- /dev/null
+++ b/regtest/sha256/bitcoin-core-26.1-SHA256SUMS
@@ -0,0 +1,27 @@
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new file mode 100644
index 0000000..97b722d
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new file mode 100644
index 0000000..b4d9124
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new file mode 100644
index 0000000..8cd5d1c
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diff --git a/regtest/src/client_versions.rs b/regtest/src/client_versions.rs
index ae854c1..82c40be 100644
--- a/regtest/src/client_versions.rs
+++ b/regtest/src/client_versions.rs
@@ -1,11 +1,28 @@
-// All features uses 26_0
+// All features uses 26_2
 /// The version specific client and json types.
 ///
 /// **THIS IS AVAILABLE FOR ALL VERSION NUMBER FEATURES** (eg `25_0`, `24_2` etc). This crate is
 /// unusual in that it expects exactly one version number feature to be selected, docs.rs is not set
 /// up to handle such oddity.
 ///
-#[cfg(feature = "26_0")]
+
+#[cfg(feature = "27_1")]
+#[allow(unused_imports)] // Not all users need the json types.
+pub use bitcoind_json_rpc_client::{client_sync::v27::{Client, AddressType}, json::v27 as json};
+
+#[cfg(all(feature = "27_0", not(feature = "27_1")))]
+#[allow(unused_imports)] // Not all users need the json types.
+pub use bitcoind_json_rpc_client::{client_sync::v27::{Client, AddressType}, json::v27 as json};
+
+#[cfg(all(feature = "26_2", not(feature = "27_0")))]
+#[allow(unused_imports)] // Not all users need the json types.
+pub use bitcoind_json_rpc_client::{client_sync::v26::{Client, AddressType}, json::v26 as json};
+
+#[cfg(all(feature = "26_1", not(feature = "26_2")))]
+#[allow(unused_imports)] // Not all users need the json types.
+pub use bitcoind_json_rpc_client::{client_sync::v26::{Client, AddressType}, json::v26 as json};
+
+#[cfg(all(feature = "26_0", not(feature = "26_1")))]
 #[allow(unused_imports)] // Not all users need the json types.
 pub use bitcoind_json_rpc_client::{client_sync::v26::{Client, AddressType}, json::v26 as json};
 
@@ -74,6 +91,6 @@ pub use bitcoind_json_rpc_client::{client_sync::v18::{Client, AddressType}, json
 pub use bitcoind_json_rpc_client::{client_sync::v17::{Client, AddressType}, json::v17 as json};
 
 // To make --no-default-features work we have to re-export a the types, use most recent version same as we do for all features.
-#[cfg(all(not(feature = "26_0"), not(feature = "25_2"), not(feature = "25_1"), not(feature = "25_0"), not(feature = "24_2"),not(feature = "24_1"), not(feature = "24_0_1"), not(feature = "23_2"), not(feature = "23_1"), not(feature = "23_0"), not(feature = "22_1"), not(feature = "22_0"), not(feature = "0_21_2"), not(feature = "0_20_2"), not(feature = "0_19_1"), not(feature = "0_18_1"), not(feature = "0_17_1")))]
+#[cfg(all(not(feature = "27_1"), not(feature = "27_0"), not(feature = "26_2"), not(feature = "26_1"), not(feature = "26_0"), not(feature = "25_2"), not(feature = "25_1"), not(feature = "25_0"), not(feature = "24_2"),not(feature = "24_1"), not(feature = "24_0_1"), not(feature = "23_2"), not(feature = "23_1"), not(feature = "23_0"), not(feature = "22_1"), not(feature = "22_0"), not(feature = "0_21_2"), not(feature = "0_20_2"), not(feature = "0_19_1"), not(feature = "0_18_1"), not(feature = "0_17_1")))]
 #[allow(unused_imports)] // Not all users need the json types.
-pub use bitcoind_json_rpc_client::{client_sync::v26::{Client, AddressType}, json::v26 as json};
+pub use bitcoind_json_rpc_client::{client_sync::v27::{Client, AddressType}, json::v27 as json};
diff --git a/regtest/src/versions.rs b/regtest/src/versions.rs
index 1c5767c..33cedfd 100644
--- a/regtest/src/versions.rs
+++ b/regtest/src/versions.rs
@@ -1,4 +1,16 @@
-#[cfg(feature = "26_0")]
+#[cfg(feature = "27_1")]
+pub const VERSION: &str = "27.1";
+
+#[cfg(all(feature = "27_0", not(feature = "27_1")))]
+pub const VERSION: &str = "27.0";
+
+#[cfg(all(feature = "26_2", not(feature = "27_0")))]
+pub const VERSION: &str = "26.2";
+
+#[cfg(all(feature = "26_1", not(feature = "26_2")))]
+pub const VERSION: &str = "26.1";
+
+#[cfg(all(feature = "26_0", not(feature = "26_1")))]
 pub const VERSION: &str = "26.0";
 
 #[cfg(all(feature = "25_2", not(feature = "26_0")))]
@@ -50,6 +62,6 @@ pub const VERSION: &str = "0.18.1";
 pub const VERSION: &str = "0.17.1";
 
 // To make --no-default-features work we have to enable some feature, use most recent version same as for default.
-#[cfg(all(not(feature = "26_0"), not(feature = "25_2"), not(feature = "25_1"), not(feature = "25_0"), not(feature = "24_2"),not(feature = "24_1"), not(feature = "24_0_1"), not(feature = "23_2"), not(feature = "23_1"), not(feature = "23_0"), not(feature = "22_1"), not(feature = "22_0"), not(feature = "0_21_2"), not(feature = "0_20_2"), not(feature = "0_19_1"), not(feature = "0_18_1"), not(feature = "0_17_1")))]
+#[cfg(all(not(feature = "27_1"), not(feature = "27_0"), not(feature = "26_2"), not(feature = "26_1"), not(feature = "26_0"), not(feature = "25_2"), not(feature = "25_1"), not(feature = "25_0"), not(feature = "24_2"),not(feature = "24_1"), not(feature = "24_0_1"), not(feature = "23_2"), not(feature = "23_1"), not(feature = "23_0"), not(feature = "22_1"), not(feature = "22_0"), not(feature = "0_21_2"), not(feature = "0_20_2"), not(feature = "0_19_1"), not(feature = "0_18_1"), not(feature = "0_17_1")))]
 #[allow(dead_code)]         // for --no-default-features
-pub const VERSION: &str = "26.0";
+pub const VERSION: &str = "27.1";