diff --git a/README.md b/README.md
index f752d97..56ff2c5 100644
--- a/README.md
+++ b/README.md
@@ -14,11 +14,6 @@ if provider is not None:
     provider_models = list(provider.iter_models())
 ```
 
-Provider display names are not unique upstream, so `get_provider_by_name`
-returns `None` when a name is shared by more than one provider. Use
-`get_providers_by_name` to retrieve every match, or `get_provider_by_id` for an
-unambiguous lookup.
-
 ## Development
 
 Install dependencies and run the test suite with uv:
diff --git a/src/modelsdotdev/__init__.py b/src/modelsdotdev/__init__.py
index fd6796d..d1eccc0 100644
--- a/src/modelsdotdev/__init__.py
+++ b/src/modelsdotdev/__init__.py
@@ -16,7 +16,6 @@
     get_model_by_id,
     get_provider_by_id,
     get_provider_by_name,
-    get_providers_by_name,
     iter_models,
     iter_providers,
     parse_model_id,
@@ -38,7 +37,6 @@
     "get_model_by_id",
     "get_provider_by_id",
     "get_provider_by_name",
-    "get_providers_by_name",
     "iter_models",
     "iter_providers",
     "parse_model_id",
diff --git a/src/modelsdotdev/_internal/data.py b/src/modelsdotdev/_internal/data.py
index d2eb9d3..d0873bc 100644
--- a/src/modelsdotdev/_internal/data.py
+++ b/src/modelsdotdev/_internal/data.py
@@ -239,31 +239,15 @@ def qualified_id(self) -> str:
 DB_PATH = Path(__file__).parents[1] / "_db.sqlite"
 
 
-def get_providers_by_name(name: str) -> list[Provider]:
-    """Return all providers with the given display name, case-insensitively.
-
-    Upstream no longer guarantees provider names are unique, so a name may
-    resolve to more than one provider. Results are ordered by provider ID.
-    """
+def get_provider_by_name(name: str) -> Provider | None:
+    """Return a provider by display name, using case-insensitive matching."""
     with closing(_connect()) as connection:
-        rows = connection.execute(
+        row = connection.execute(
             f"SELECT {PROVIDER_COLUMNS} FROM providers "
-            "WHERE name = ? COLLATE NOCASE ORDER BY id",
+            "WHERE name = ? COLLATE NOCASE",
             (name,),
-        ).fetchall()
-        return [_provider_from_row(row) for row in rows]
-
-
-def get_provider_by_name(name: str) -> Provider | None:
-    """Return the sole provider with the given display name, else ``None``.
-
-    Matching is case-insensitive. When the name is ambiguous (shared by two or
-    more providers) ``None`` is returned, since there is no single correct
-    match; use :func:`get_providers_by_name` or look up by ID via
-    :func:`get_provider_by_id` instead.
-    """
-    providers = get_providers_by_name(name)
-    return providers[0] if len(providers) == 1 else None
+        ).fetchone()
+        return None if row is None else _provider_from_row(row)
 
 
 def get_provider_by_id(provider_id: str) -> Provider | None:
diff --git a/src/modelsdotdev/_internal/schema.py b/src/modelsdotdev/_internal/schema.py
index 318465d..48260e7 100644
--- a/src/modelsdotdev/_internal/schema.py
+++ b/src/modelsdotdev/_internal/schema.py
@@ -87,7 +87,7 @@ def _schema_sql(tables: tuple[Table, ...]) -> str:
         Column(name="env", definition="TEXT NOT NULL"),
     ),
     indexes=(
-        "CREATE INDEX providers_name_nocase_idx "
+        "CREATE UNIQUE INDEX providers_name_nocase_idx "
         "ON providers(name COLLATE NOCASE);",
     ),
 )
diff --git a/tests/test_api.py b/tests/test_api.py
index e7c0a03..14c3905 100644
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -1,5 +1,4 @@
 import sqlite3
-from collections import Counter
 from contextlib import closing
 
 import pytest
@@ -20,7 +19,6 @@
     get_model_by_id,
     get_provider_by_id,
     get_provider_by_name,
-    get_providers_by_name,
     iter_models,
     iter_providers,
     parse_model_id,
@@ -36,41 +34,17 @@ def test_provider_iteration_and_lookup_use_real_database() -> None:
         key=lambda provider: provider.name.lower(),
     )
     assert len({provider.id for provider in providers}) == len(providers)
-
-    # Upstream no longer guarantees provider names are unique.
-    name_counts = Counter(provider.name.lower() for provider in providers)
-
-    # A provider whose name is unique (case-insensitively) resolves by name.
-    unique = next(
-        provider
-        for provider in providers
-        if name_counts[provider.name.lower()] == 1
-    )
-    assert isinstance(unique, Provider)
-    assert get_provider_by_id(unique.id) == unique
-    assert get_provider_by_name(unique.name) == unique
-    assert get_provider_by_name(unique.name.upper()) == unique
-    assert get_providers_by_name(unique.name) == [unique]
-
-    # An ambiguous name (shared by 2+ providers) resolves to None via the
-    # singular getter but is fully enumerated by the plural getter.
-    ambiguous = next(
-        (
-            provider.name
-            for provider in providers
-            if name_counts[provider.name.lower()] > 1
-        ),
-        None,
+    assert len({provider.name.lower() for provider in providers}) == len(
+        providers,
     )
-    if ambiguous is not None:
-        matches = get_providers_by_name(ambiguous)
-        assert len(matches) == name_counts[ambiguous.lower()]
-        assert matches == get_providers_by_name(ambiguous.upper())
-        assert get_provider_by_name(ambiguous) is None
 
+    provider = providers[0]
+    assert isinstance(provider, Provider)
+    assert get_provider_by_id(provider.id) == provider
+    assert get_provider_by_name(provider.name) == provider
+    assert get_provider_by_name(provider.name.upper()) == provider
     assert get_provider_by_id("missing-provider") is None
     assert get_provider_by_name("missing provider") is None
-    assert get_providers_by_name("missing provider") == []
 
 
 def test_model_iteration_and_lookup_use_real_database() -> None: