diff --git a/.cirrus.yml b/.cirrus.yml
index 47c02b06..4f2538a1 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -32,6 +32,7 @@ unittests_task:
     - pip install git+https://github.com/bitcoinplusorg/x13-hash
     - pip install xevan_hash
     - pip install quark_hash
+    - pip install algomodule
     - pip install groestlcoin_hash
     - pip install x16r_hash
     - pip install pycryptodomex
diff --git a/electrumx/lib/coins.py b/electrumx/lib/coins.py
index ef25c74c..bbf31225 100644
--- a/electrumx/lib/coins.py
+++ b/electrumx/lib/coins.py
@@ -50,7 +50,7 @@
 import electrumx.server.daemon as daemon
 from electrumx.server.session import (ElectrumX, DashElectrumX,
                                       SmartCashElectrumX, AuxPoWElectrumX,
-                                      NameIndexElectrumX, NameIndexAuxPoWElectrumX)
+                                      NameIndexElectrumX, NameIndexAuxPoWElectrumX, HemisElectrumX)
 
 
 @dataclass
@@ -4239,3 +4239,80 @@ class FerriteTestnet(Ferrite):
         'enode2.ferritecoin.org s t',
         'enode3.ferritecoin.org s t',
     ]
+
+
+class Hemis(Coin):
+    NAME = "Hemis"
+    SHORTNAME = "HMS"
+    NET = "mainnet"
+    XPUB_VERBYTES = bytes.fromhex("A0F2F5F3")
+    XPRV_VERBYTES = bytes.fromhex("A0F3F1FB")
+    GENESIS_HASH = '000000956c582b70df5d2c9b4b83d05b5331978e40d639739bdc96c29e156ce7'
+    P2PKH_VERBYTE = bytes.fromhex("28")
+    P2SH_VERBYTE = bytes.fromhex("0D")
+    WIF_BYTE = bytes.fromhex("D4")
+    DESERIALIZER = lib_tx.DeserializerPIVX
+    TX_COUNT_HEIGHT = 569399
+    TX_COUNT = 2157510
+    TX_PER_BLOCK = 1
+    STATIC_BLOCK_HEADERS = False
+    RPC_PORT = 51473
+    REORG_LIMIT = 100
+    EXPANDED_HEADER = 112
+    SAPLING_START_HEIGHT = 502
+    BLOCK_VERSION = 11
+    SESSIONCLS = HemisElectrumX
+
+    @classmethod
+    def static_header_len(cls, height):
+        '''Given a header height return its length.'''
+        if height <= 499:
+            return cls.BASIC_HEADER_SIZE
+        elif height == 500:
+            return cls.EXPANDED_HEADER
+        elif height == 501:
+            return cls.BASIC_HEADER_SIZE
+        else:
+            return cls.EXPANDED_HEADER
+
+    @classmethod
+    def header_hash(cls, header):
+        '''Given a header return the hash.'''
+        version, = struct.unpack('<I', header[:4])
+        if version < 5:
+            import algomodule
+            return algomodule._quark_hash(header)
+        else:
+            return super().header_hash(header)
+
+
+class HemisTestnet(Hemis):
+    SHORTNAME = "tHMS"
+    NET = "testnet"
+    XPUB_VERBYTES = bytes.fromhex("3A8061A0")
+    XPRV_VERBYTES = bytes.fromhex("3A805837")
+    GENESIS_HASH = '000000798b274f80ef80da249806ed8d86dec9338a58b34073b7014096e3d0c5'
+    P2PKH_VERBYTE = bytes.fromhex("8B")
+    P2SH_VERBYTE = bytes.fromhex("13")
+    WIF_BYTE = bytes.fromhex("EF")
+    DESERIALIZER = lib_tx.DeserializerPIVX
+    TX_COUNT_HEIGHT = 8000
+    TX_COUNT = 10000
+    TX_PER_BLOCK = 1
+    RPC_PORT = 51475
+    REORG_LIMIT = 1000
+    STATIC_BLOCK_HEADERS = False
+    EXPANDED_HEADER = 112
+    SESSIONCLS = HemisElectrumX
+
+    @classmethod
+    def static_header_len(cls, height):
+        '''Given a header height return its length.'''
+        if height <= 499:
+            return cls.BASIC_HEADER_SIZE
+        elif height == 500:
+            return cls.EXPANDED_HEADER
+        elif height == 501:
+            return cls.BASIC_HEADER_SIZE
+        else:
+            return cls.EXPANDED_HEADER
diff --git a/electrumx/server/session.py b/electrumx/server/session.py
index 75f83f3e..465fc4fb 100644
--- a/electrumx/server/session.py
+++ b/electrumx/server/session.py
@@ -1884,3 +1884,29 @@ async def name_get_value_proof(self, scripthash, cp_height=0):
 
 class NameIndexAuxPoWElectrumX(NameIndexElectrumX, AuxPoWElectrumX):
     pass
+
+
+class HemisElectrumX(ElectrumX):
+    async def block_headers(self, start_height, count, cp_height=0):
+        '''Return count concatenated block headers as hex for the main chain;
+        starting at start_height.
+        start_height and count must be non-negative integers.  At most
+        MAX_CHUNK_SIZE headers will be returned.
+        '''
+        start_height = non_negative_integer(start_height)
+        count = non_negative_integer(count)
+        cp_height = non_negative_integer(cp_height)
+        cost = count / 50
+
+        max_size = self.MAX_CHUNK_SIZE
+        count = min(count, max_size)
+        result = {'headers': [], 'count': count, 'max': max_size}
+        for x in range(0, count):
+            raw_header_hex = (await self.session_mgr.raw_header(start_height + x)).hex()
+            result['headers'].append(raw_header_hex)
+        if count and cp_height:
+            cost += 1.0
+            last_height = start_height + count - 1
+            result.updaate(await self._merkle_proof(cp_height, last_height))
+        self.bump_cost(cost)
+        return result
diff --git a/tests/blocks/hemis_mainnet_300000.json b/tests/blocks/hemis_mainnet_300000.json
new file mode 100644
index 00000000..baad4a71
--- /dev/null
+++ b/tests/blocks/hemis_mainnet_300000.json
@@ -0,0 +1,26 @@
+{
+  "hash": "c07c17b024bc7436112ae15b67567d9b4f36c18681c22621f3c9c5d6915336b9",
+  "confirmations": 35683,
+  "size": 485,
+  "height": 300000,
+  "version": 11,
+  "merkleroot": "d9e4c5799c9117edd741905eb4dc446632cc086aac9b335cb4d59be1791ae4cc",
+  "acc_checkpoint": "0000000000000000000000000000000000000000000000000000000000000000",
+  "finalsaplingroot": "3e49b5f954aa9d3545bc6c37744661eea48d7c34e3000d82b7f0010c30f4c2fb",
+  "tx": [
+    "e49a0ef015323b1dfda41043c908c1ddb6fcf328dc247d356ed4a3ee25920501",
+    "8e21adfbab34795cc3cf6b1e68f0fbb668e543516d158996411e76be83acfb33"
+  ],
+  "time": 1724105355,
+  "mediantime": 1724105010,
+  "nonce": 0,
+  "bits": "1b3da7c3",
+  "difficulty": 1062.925321539171,
+  "chainwork": "00000000000000000000000000000000000000000000000011d7a4eb61d88179",
+  "previousblockhash": "52348e3dd43969f222dad3aba6406fe0b031532482bdd553a1901ee075be5221",
+  "nextblockhash": "55e4c9dac5fdc6784931004ff140f6eba204c32006df44fd58ccdd96e90c0b8b",
+  "stakeModifier": "c4b8c37b4b2e63838eeadf03962dbb740073ed5202cbf4da3633a3720fdd82c9",
+  "hashProofOfStake": "00011838f8d02c19af00f40369d8ceb8a3e5af6e987440207b0fa317eab82e2f",
+  "chainlock": false,
+  "block": "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"
+}
\ No newline at end of file