diff --git a/pm3py/cli/rawcli/app.py b/pm3py/cli/rawcli/app.py
index 7dc5861..6dfdab4 100644
--- a/pm3py/cli/rawcli/app.py
+++ b/pm3py/cli/rawcli/app.py
@@ -13,6 +13,7 @@ from .session import RawSession
 from .parser import parse_line
 from .entry import install_key_bindings
 from .identify import identify, clear, format_summary
+from .catalog import catalog_for
 from .trace_view import render_exchange
 
 _HELP = """\
@@ -70,7 +71,7 @@ def dispatch(state: RawSession, line: str) -> bool:
         if cmd.name in ("quit", "exit", "q"):
             return False
         if cmd.name == "help":
-            print(_HELP)
+            _handle_help(state, cmd.args)
         elif cmd.name == "identify":
             print(format_summary(identify(state)))
         elif cmd.name == "transponder":
@@ -81,8 +82,7 @@ def dispatch(state: RawSession, line: str) -> bool:
         return True
 
     if cmd.kind == "call":
-        # function-style transponder commands land in Phase 4 (the command catalog)
-        print(f"rawcli: {cmd.name}(...) needs an identified transponder + catalog (Phase 4)")
+        _handle_call(state, cmd)
         return True
 
     # raw payload
@@ -94,6 +94,40 @@ def dispatch(state: RawSession, line: str) -> bool:
     return True
 
 
+def _handle_call(state: RawSession, cmd) -> None:
+    catalog = catalog_for(state)
+    if catalog is None:
+        print("no transponder identified — run 'identify' first")
+        return
+    tc = catalog.get(cmd.name)
+    if tc is None:
+        print(f"unknown command {cmd.name!r} for {catalog.name}; try 'help'")
+        return
+    try:
+        payload = tc.build(*cmd.args)
+    except (TypeError, ValueError) as exc:
+        print(f"usage: {tc.usage()}  ({exc})")
+        return
+    response = _raw_exchange(state.device, payload, protocol=catalog.protocol)
+    print(render_exchange(payload, response, protocol=catalog.protocol,
+                          is_tty=sys.stdout.isatty()))
+
+
+def _handle_help(state: RawSession, args) -> None:
+    catalog = catalog_for(state)
+    if args and catalog is not None:
+        tc = catalog.get(args[0])
+        if tc is not None:
+            print(f"{tc.usage()}  —  {tc.help}")
+            return
+    print(_HELP)
+    if catalog is not None:
+        print(f"\n{catalog.name} commands:")
+        for name in catalog.names():
+            tc = catalog.get(name)
+            print(f"  {tc.usage():<28}{tc.help}")
+
+
 def run(port=None) -> int:
     from prompt_toolkit import PromptSession
     from prompt_toolkit.key_binding import KeyBindings
diff --git a/pm3py/cli/rawcli/catalog.py b/pm3py/cli/rawcli/catalog.py
new file mode 100644
index 0000000..99d0e63
--- /dev/null
+++ b/pm3py/cli/rawcli/catalog.py
@@ -0,0 +1,102 @@
+"""Per-transponder command catalogs.
+
+A declarative, enumerable command set for each tag family: each entry knows its parameters, how
+to **build** the raw bytes to send, and its help text. rawcli surfaces these for ``help`` and for
+function-style calls (``READ(4)`` → build → raw exchange → annotated trace). Homed here for now;
+the richer per-vendor catalogs can migrate into the ``pm3py/reader/`` scaffold as they grow.
+"""
+from __future__ import annotations
+
+from dataclasses import dataclass
+from typing import Callable
+
+
+@dataclass
+class TagCommand:
+    name: str
+    params: tuple[str, ...]
+    build: Callable[..., bytes]     # string args -> raw payload bytes
+    help: str = ""
+
+    def usage(self) -> str:
+        return f"{self.name}({', '.join(self.params)})"
+
+
+@dataclass
+class Catalog:
+    name: str
+    protocol: str
+    commands: dict[str, TagCommand]
+
+    def get(self, name: str) -> TagCommand | None:
+        return self.commands.get(name.upper())
+
+    def names(self) -> list[str]:
+        return list(self.commands)
+
+
+def _int(s: str) -> int:
+    return int(s, 0)                 # accepts decimal or 0x-prefixed
+
+
+def _hex(s: str) -> bytes:
+    return bytes.fromhex(s.lower().replace("0x", "").replace(" ", ""))
+
+
+def _catalog(name: str, protocol: str, *cmds: TagCommand) -> Catalog:
+    return Catalog(name, protocol, {c.name.upper(): c for c in cmds})
+
+
+def _c(name, params, build, help="") -> TagCommand:
+    return TagCommand(name, tuple(params), build, help)
+
+
+# ---- ISO 14443-A Type 2 (NTAG / Ultralight) ----
+TYPE2 = _catalog(
+    "NTAG / Ultralight (Type 2)", "hf14a",
+    _c("READ", ["page"], lambda page: bytes([0x30, _int(page)]),
+       "read 4 pages starting at <page> (0x30)"),
+    _c("FAST_READ", ["start", "end"], lambda start, end: bytes([0x3A, _int(start), _int(end)]),
+       "read pages <start>..<end> in one frame (0x3A)"),
+    _c("GET_VERSION", [], lambda: bytes([0x60]), "product/version info (0x60)"),
+    _c("READ_SIG", [], lambda: bytes([0x3C, 0x00]), "read the ECC originality signature (0x3C)"),
+    _c("READ_CNT", ["counter"], lambda counter="0": bytes([0x39, _int(counter)]),
+       "read the 24-bit NFC counter (0x39)"),
+    _c("WRITE", ["page", "data"],
+       lambda page, data: bytes([0xA2, _int(page)]) + _hex(data).ljust(4, b"\x00")[:4],
+       "write 4 bytes <data> to <page> (0xA2)"),
+)
+
+# ---- MIFARE Classic (block ops; auth is the reader's job before these) ----
+MFC = _catalog(
+    "MIFARE Classic", "hf14a",
+    _c("READ", ["block"], lambda block: bytes([0x30, _int(block)]),
+       "read a 16-byte block (needs prior auth) (0x30)"),
+    _c("WRITE", ["block"], lambda block: bytes([0xA0, _int(block)]),
+       "start a block write, two-phase (0xA0)"),
+    _c("HALT", [], lambda: bytes([0x50, 0x00]), "halt the card (0x50 00)"),
+)
+
+# ---- ISO 15693 (flags byte 0x02 = high data rate, single tag) ----
+ISO15 = _catalog(
+    "ISO 15693", "hf15",
+    _c("INVENTORY", [], lambda: bytes([0x26, 0x01, 0x00]), "anticollision inventory (0x01)"),
+    _c("READ_BLOCK", ["block"], lambda block: bytes([0x02, 0x20, _int(block)]),
+       "read a single block (0x20)"),
+    _c("WRITE_BLOCK", ["block", "data"],
+       lambda block, data: bytes([0x02, 0x21, _int(block)]) + _hex(data),
+       "write a single block (0x21)"),
+    _c("GET_SYSTEM_INFO", [], lambda: bytes([0x02, 0x2B]), "get system information (0x2B)"),
+)
+
+
+def catalog_for(session) -> Catalog | None:
+    """Resolve the command catalog for the session's identified transponder, or None."""
+    name = (session.transponder or "").upper()
+    if session.protocol == "hf15":
+        return ISO15
+    if session.protocol == "hf14a":
+        if not session.transponder:
+            return None
+        return MFC if "CLASSIC" in name else TYPE2
+    return None
diff --git a/tests/test_rawcli.py b/tests/test_rawcli.py
index 5c36147..be2110a 100644
--- a/tests/test_rawcli.py
+++ b/tests/test_rawcli.py
@@ -11,6 +11,7 @@ from pm3py.cli.rawcli.trace_view import render_exchange
 from pm3py.cli.rawcli.parser import parse_token, parse_bytes, parse_line
 from pm3py.cli.rawcli.entry import byte_space
 from pm3py.cli.rawcli.identify import identify, clear, name_14a
+from pm3py.cli.rawcli.catalog import TYPE2, ISO15, catalog_for, catalog_for as _cf
 from pm3py.cli.rawcli.app import dispatch
 
 _ANSI = re.compile(r"\x1b\[[0-9;]*m")
@@ -200,3 +201,67 @@ class TestControlCommands:
         dispatch(s, "close")
         assert "closed" in capsys.readouterr().out
         assert s.transponder is None
+
+
+class TestCatalog:
+    def test_type2_builds(self):
+        assert TYPE2.get("READ").build("4") == b"\x30\x04"
+        assert TYPE2.get("read").build("0x04") == b"\x30\x04"     # case + hex arg
+        assert TYPE2.get("FAST_READ").build("0", "3") == b"\x3A\x00\x03"
+        assert TYPE2.get("GET_VERSION").build() == b"\x60"
+        assert TYPE2.get("WRITE").build("4", "01020304") == b"\xA2\x04\x01\x02\x03\x04"
+
+    def test_iso15_builds(self):
+        assert ISO15.get("READ_BLOCK").build("4") == b"\x02\x20\x04"
+        assert ISO15.get("INVENTORY").build() == b"\x26\x01\x00"
+
+    def test_resolver(self):
+        s = RawSession()
+        assert catalog_for(s) is None                       # nothing identified
+        s.protocol, s.transponder = "hf14a", "NTAG215"
+        assert catalog_for(s) is TYPE2
+        s.transponder = "MIFARE Classic 1K"
+        assert catalog_for(s).name == "MIFARE Classic"
+        s.protocol, s.transponder = "hf15", "ISO15693"
+        assert catalog_for(s) is ISO15
+
+
+class TestFunctionCalls:
+    def _id(self, sak=0x00):
+        return RawSession(device=_mock_device(
+            scan14={"found": True, "sak": sak, "uid": b"\x04\x01\x02\x03"}))
+
+    def test_call_read_sends_correct_bytes(self, capsys):
+        s = self._id()
+        dispatch(s, "identify")
+        s.device.hf.iso14a.raw.return_value = {"data": b"\xAA\xBB\xCC\xDD"}
+        capsys.readouterr()
+        dispatch(s, "READ(4)")
+        out = _plain(capsys.readouterr().out)
+        assert "30 04" in out           # the built command hit the trace
+        s.device.hf.iso14a.raw.assert_called_with(b"\x30\x04")
+
+    def test_call_without_identify(self, capsys):
+        dispatch(RawSession(), "READ(4)")
+        assert "identify" in capsys.readouterr().out
+
+    def test_unknown_call(self, capsys):
+        s = self._id(); dispatch(s, "identify"); capsys.readouterr()
+        dispatch(s, "FLY(4)")
+        assert "unknown command" in capsys.readouterr().out
+
+    def test_bad_args_shows_usage(self, capsys):
+        s = self._id(); dispatch(s, "identify"); capsys.readouterr()
+        dispatch(s, "READ()")           # missing page arg
+        assert "usage: READ(page)" in capsys.readouterr().out
+
+    def test_help_lists_catalog(self, capsys):
+        s = self._id(); dispatch(s, "identify"); capsys.readouterr()
+        dispatch(s, "help")
+        out = capsys.readouterr().out
+        assert "READ(page)" in out and "GET_VERSION" in out
+
+    def test_help_command_detail(self, capsys):
+        s = self._id(); dispatch(s, "identify"); capsys.readouterr()
+        dispatch(s, "help READ")
+        assert "0x30" in capsys.readouterr().out