diff --git a/CHANGELOG.md b/CHANGELOG.md
index dd15e4c..1e6527e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Hermes Web UI -- Changelog
 
+## [v0.50.84] — 2026-04-18
+
+### Fixed
+- **MiniMax M2.7 now appears in the model dropdown for OpenRouter users** — `MiniMax-M2.7` and `MiniMax-M2.7-highspeed` were present in `_PROVIDER_MODELS['minimax']` but absent from `_FALLBACK_MODELS`, so OpenRouter users (who see the fallback list) never saw them. Both models added to the fallback list under the `MiniMax` provider label.
+- **`MINIMAX_API_KEY` env var now triggers MiniMax detection** — the env scan tuple in `get_available_models()` was missing `MINIMAX_API_KEY` and `MINIMAX_CN_API_KEY`, so users who set those vars directly in `os.environ` (rather than in `~/.hermes/.env`) did not see the MiniMax provider in the dropdown. Both keys now scanned. (PR #650 by @octo-patch)
+
 ## [v0.50.83] — 2026-04-18
 
 ### Fixed
diff --git a/api/config.py b/api/config.py
index 1ac0eb4..bbe1416 100644
--- a/api/config.py
+++ b/api/config.py
@@ -449,6 +449,9 @@ _FALLBACK_MODELS = [
     {"provider": "xAI",       "id": "x-ai/grok-4.20",                    "label": "Grok 4.20"},
     # Mistral
     {"provider": "Mistral",   "id": "mistralai/mistral-large-latest",     "label": "Mistral Large"},
+    # MiniMax
+    {"provider": "MiniMax",   "id": "minimax/MiniMax-M2.7",             "label": "MiniMax M2.7"},
+    {"provider": "MiniMax",   "id": "minimax/MiniMax-M2.7-highspeed",   "label": "MiniMax M2.7 Highspeed"},
 ]
 
 # Provider display names for known Hermes provider IDs
@@ -819,6 +822,8 @@ def get_available_models() -> dict:
             "DEEPSEEK_API_KEY",
             "OPENCODE_ZEN_API_KEY",
             "OPENCODE_GO_API_KEY",
+            "MINIMAX_API_KEY",
+            "MINIMAX_CN_API_KEY",
         ):
             val = os.getenv(k)
             if val:
diff --git a/static/index.html b/static/index.html
index fb34405..9ca3966 100644
--- a/static/index.html
+++ b/static/index.html
@@ -592,7 +592,7 @@
                 <div class="settings-section-title">System</div>
                 <div class="settings-section-meta">Instance version and access controls.</div>
               </div>
-              <span class="settings-version-badge">v0.50.83</span>
+              <span class="settings-version-badge">v0.50.84</span>
             </div>
             <div class="settings-field" style="border-top:1px solid var(--border);padding-top:12px;margin-top:8px">
               <label for="settingsPassword" data-i18n="settings_label_password">Access Password</label>
diff --git a/tests/test_minimax_provider.py b/tests/test_minimax_provider.py
new file mode 100644
index 0000000..27c594d
--- /dev/null
+++ b/tests/test_minimax_provider.py
@@ -0,0 +1,148 @@
+"""
+Tests for MiniMax provider support in the model/provider discovery layer.
+
+Covers:
+  - MiniMax models appear in the fallback model list
+  - MINIMAX_API_KEY env var is scanned and detected from os.environ
+  - @minimax: provider hint routing works correctly
+  - minimax/MiniMax-M2.7 (slash format) is routed via openrouter when active provider differs
+"""
+import os
+import api.config as config
+
+
+# ── Helper ────────────────────────────────────────────────────────────────────
+
+def _resolve_with_config(model_id, provider=None, base_url=None):
+    old_cfg = dict(config.cfg)
+    model_cfg = {}
+    if provider:
+        model_cfg['provider'] = provider
+    if base_url:
+        model_cfg['base_url'] = base_url
+    config.cfg['model'] = model_cfg if model_cfg else {}
+    try:
+        return config.resolve_model_provider(model_id)
+    finally:
+        config.cfg.clear()
+        config.cfg.update(old_cfg)
+
+
+# ── Fallback model list ───────────────────────────────────────────────────────
+
+def test_minimax_m2_7_in_fallback_models():
+    """MiniMax-M2.7 must appear in the hardcoded fallback model list."""
+    ids = [m['id'] for m in config._FALLBACK_MODELS]
+    assert 'minimax/MiniMax-M2.7' in ids, (
+        f"minimax/MiniMax-M2.7 missing from _FALLBACK_MODELS. Found: {ids}"
+    )
+
+
+def test_minimax_m2_7_highspeed_in_fallback_models():
+    """MiniMax-M2.7-highspeed must appear in the hardcoded fallback model list."""
+    ids = [m['id'] for m in config._FALLBACK_MODELS]
+    assert 'minimax/MiniMax-M2.7-highspeed' in ids, (
+        f"minimax/MiniMax-M2.7-highspeed missing from _FALLBACK_MODELS. Found: {ids}"
+    )
+
+
+def test_minimax_fallback_provider_label():
+    """MiniMax fallback entries must use 'MiniMax' as the provider label."""
+    minimax_entries = [m for m in config._FALLBACK_MODELS if 'minimax' in m['id'].lower()]
+    assert minimax_entries, "No MiniMax entries found in _FALLBACK_MODELS"
+    for entry in minimax_entries:
+        assert entry['provider'] == 'MiniMax', (
+            f"Expected provider='MiniMax', got '{entry['provider']}' for {entry['id']}"
+        )
+
+
+# ── _PROVIDER_MODELS ──────────────────────────────────────────────────────────
+
+def test_minimax_provider_models_has_m2_7():
+    """_PROVIDER_MODELS['minimax'] must include MiniMax-M2.7."""
+    models = config._PROVIDER_MODELS.get('minimax', [])
+    ids = [m['id'] for m in models]
+    assert 'MiniMax-M2.7' in ids, (
+        f"MiniMax-M2.7 missing from _PROVIDER_MODELS['minimax']. Found: {ids}"
+    )
+
+
+def test_minimax_provider_models_has_highspeed():
+    """_PROVIDER_MODELS['minimax'] must include MiniMax-M2.7-highspeed."""
+    models = config._PROVIDER_MODELS.get('minimax', [])
+    ids = [m['id'] for m in models]
+    assert 'MiniMax-M2.7-highspeed' in ids, (
+        f"MiniMax-M2.7-highspeed missing from _PROVIDER_MODELS['minimax']. Found: {ids}"
+    )
+
+
+# ── MINIMAX_API_KEY env var detection ─────────────────────────────────────────
+
+def test_minimax_api_key_in_env_scan_tuple():
+    """MINIMAX_API_KEY must be included in the env var scan performed by
+    get_available_models(), so users who export MINIMAX_API_KEY see the
+    MiniMax provider in the dropdown without editing ~/.hermes/.env."""
+    import inspect, ast, textwrap
+    src = inspect.getsource(config.get_available_models)
+    assert 'MINIMAX_API_KEY' in src, (
+        "MINIMAX_API_KEY not found in get_available_models() source — "
+        "it must be added to the env var scan tuple so os.environ is checked."
+    )
+
+
+def test_minimax_cn_api_key_in_env_scan_tuple():
+    """MINIMAX_CN_API_KEY must also be scanned (mainland China API key variant)."""
+    import inspect
+    src = inspect.getsource(config.get_available_models)
+    assert 'MINIMAX_CN_API_KEY' in src, (
+        "MINIMAX_CN_API_KEY not found in get_available_models() source."
+    )
+
+
+def test_minimax_detected_from_os_environ(monkeypatch):
+    """Setting MINIMAX_API_KEY in os.environ triggers minimax provider detection."""
+    monkeypatch.setenv('MINIMAX_API_KEY', 'test-key-from-env')
+    old_cfg = dict(config.cfg)
+    # Clear model config so the env-var fallback path is exercised
+    config.cfg['model'] = {}
+    try:
+        result = config.get_available_models()
+        provider_names = [g['provider'] for g in result['groups']]
+        assert 'MiniMax' in provider_names, (
+            f"MiniMax not detected when MINIMAX_API_KEY is set in os.environ. "
+            f"Active provider groups: {provider_names}"
+        )
+    finally:
+        config.cfg.clear()
+        config.cfg.update(old_cfg)
+
+
+# ── Model routing ─────────────────────────────────────────────────────────────
+
+def test_provider_hint_minimax_m2_7():
+    """@minimax:MiniMax-M2.7 routes to minimax provider with bare model name."""
+    model, provider, base_url = _resolve_with_config(
+        '@minimax:MiniMax-M2.7', provider='anthropic',
+    )
+    assert model == 'MiniMax-M2.7'
+    assert provider == 'minimax'
+    assert base_url is None
+
+
+def test_provider_hint_minimax_highspeed():
+    """@minimax:MiniMax-M2.7-highspeed routes to minimax provider."""
+    model, provider, base_url = _resolve_with_config(
+        '@minimax:MiniMax-M2.7-highspeed', provider='openai',
+    )
+    assert model == 'MiniMax-M2.7-highspeed'
+    assert provider == 'minimax'
+
+
+def test_minimax_slash_format_routes_openrouter_when_not_active():
+    """minimax/MiniMax-M2.7 (slash format) routes via openrouter when active
+    provider is anthropic (cross-provider routing)."""
+    model, provider, base_url = _resolve_with_config(
+        'minimax/MiniMax-M2.7', provider='anthropic',
+    )
+    assert model == 'minimax/MiniMax-M2.7'
+    assert provider == 'openrouter'