Add AzureJWTVerifier for Managed Identity token verification

docs/integrations/azure.mdx

@@ -282,3 +282,47 @@ Parameters (`jwt_signing_key` and `client_storage`) work together to ensure toke
 
 For complete details on these parameters, see the [OAuth Proxy documentation](/servers/auth/oauth-proxy#configuration-parameters).
 </Note>
+
+## Token Verification Only (Managed Identity)
+
+<VersionBadge version="2.15.0" />
+
+For deployments where your server only needs to **validate incoming tokens** — such as Azure Container Apps with Managed Identity — use `AzureJWTVerifier` with `RemoteAuthProvider` instead of the full `AzureProvider`.
+
+This pattern is ideal when:
+- Your infrastructure handles authentication (e.g., Managed Identity)
+- You don't need the OAuth proxy flow (no `client_secret` required)
+- You just need to verify that incoming Azure AD tokens are valid
+
+```python server.py
+from fastmcp import FastMCP
+from fastmcp.server.auth import RemoteAuthProvider
+from fastmcp.server.auth.providers.azure import AzureJWTVerifier
+from pydantic import AnyHttpUrl
+
+tenant_id = "your-tenant-id"
+client_id = "your-client-id"
+
+# AzureJWTVerifier auto-configures JWKS, issuer, and audience
+verifier = AzureJWTVerifier(
+    client_id=client_id,
+    tenant_id=tenant_id,
+    required_scopes=["access_as_user"],  # Scope names from Azure Portal
+)
+
+auth = RemoteAuthProvider(
+    token_verifier=verifier,
+    authorization_servers=[
+        AnyHttpUrl(f"https://login.microsoftonline.com/{tenant_id}/v2.0")
+    ],
+    base_url="https://your-container-app.azurecontainerapps.io",
+)
+
+mcp = FastMCP(name="Azure MI App", auth=auth)
+```
+
+`AzureJWTVerifier` handles Azure's scope format automatically. You write scope names exactly as they appear in Azure Portal under **Expose an API** (e.g., `access_as_user`). The verifier validates tokens using the short-form scopes that Azure puts in the `scp` claim, while advertising the full URI scopes (e.g., `api://your-client-id/access_as_user`) in OAuth metadata so MCP clients know what to request.
+
+<Note>
+For Azure Government, pass `base_authority="login.microsoftonline.us"` to `AzureJWTVerifier`.
+</Note>

docs/servers/auth/remote-oauth.mdx

@@ -127,6 +127,21 @@ This configuration creates a server that accepts tokens issued by `auth.yourcomp
 
 The `authorization_servers` list tells MCP clients which identity providers you trust. The `base_url` identifies your server in OAuth metadata, enabling proper token audience validation. **Important**: The `base_url` should point to your server base URL - for example, if your MCP server is accessible at `https://api.yourcompany.com/mcp`, use `https://api.yourcompany.com` as the base URL.
 
+### Overriding Advertised Scopes
+
+Some identity providers use different scope formats for authorization requests versus token claims. For example, Azure AD requires clients to request full URI scopes like `api://client-id/read`, but the token's `scp` claim contains just `read`. The `scopes_supported` parameter lets you advertise the full-form scopes in metadata while validating against the short form:
+
+```python
+auth = RemoteAuthProvider(
+    token_verifier=token_verifier,
+    authorization_servers=[AnyHttpUrl("https://auth.example.com")],
+    base_url="https://api.example.com",
+    scopes_supported=["api://my-api/read", "api://my-api/write"],
+)
+```
+
+When not set, `scopes_supported` defaults to the token verifier's `required_scopes`. For Azure AD specifically, see the [AzureJWTVerifier](/integrations/azure#token-verification-only-managed-identity) which handles this automatically.
+
 ### Custom Endpoints
 
 You can extend `RemoteAuthProvider` to add additional endpoints beyond the standard OAuth protected resource metadata. These don't have to be OAuth-specific - you can add any endpoints your authentication integration requires.

src/fastmcp/server/auth/auth.py

@@ -274,6 +274,17 @@ def __init__(
         """
         super().__init__(base_url=base_url, required_scopes=required_scopes)
 
+    @property
+    def scopes_supported(self) -> list[str]:
+        """Scopes to advertise in OAuth metadata.
+
+        Defaults to required_scopes. Override in subclasses when the
+        advertised scopes differ from the validation scopes (e.g., Azure AD
+        where tokens contain short-form scopes but clients request full URI
+        scopes).
+        """
+        return self.required_scopes or []
+
     async def verify_token(self, token: str) -> AccessToken | None:
         """Verify a bearer token and return access info if valid."""
         raise NotImplementedError("Subclasses must implement verify_token")
@@ -299,6 +310,7 @@ def __init__(
         token_verifier: TokenVerifier,
         authorization_servers: list[AnyHttpUrl],
         base_url: AnyHttpUrl | str,
+        scopes_supported: list[str] | None = None,
         resource_name: str | None = None,
         resource_documentation: AnyHttpUrl | None = None,
     ):
@@ -308,6 +320,10 @@ def __init__(
             token_verifier: TokenVerifier instance for token validation
             authorization_servers: List of authorization servers that issue valid tokens
             base_url: The base URL of this server
+            scopes_supported: Scopes to advertise in OAuth metadata. If None,
+                uses the token verifier's scopes_supported property. Use this
+                when the scopes clients request differ from the scopes that
+                appear in tokens (e.g., Azure AD full URI scopes vs short-form).
             resource_name: Optional name for the protected resource
             resource_documentation: Optional documentation URL for the protected resource
         """
@@ -317,6 +333,7 @@ def __init__(
         )
         self.token_verifier = token_verifier
         self.authorization_servers = authorization_servers
+        self._scopes_supported = scopes_supported
         self.resource_name = resource_name
         self.resource_documentation = resource_documentation
 
@@ -343,7 +360,11 @@ def get_routes(
                 create_protected_resource_routes(
                     resource_url=resource_url,
                     authorization_servers=self.authorization_servers,
-                    scopes_supported=self.token_verifier.required_scopes,
+                    scopes_supported=(
+                        self._scopes_supported
+                        if self._scopes_supported is not None
+                        else self.token_verifier.scopes_supported
+                    ),
                     resource_name=self.resource_name,
                     resource_documentation=self.resource_documentation,
                 )

src/fastmcp/server/auth/providers/azure.py

@@ -452,3 +452,103 @@ async def _extract_upstream_claims(
         except Exception as e:
             logger.debug("Failed to extract Azure claims: %s", e)
             return None
+
+
+class AzureJWTVerifier(JWTVerifier):
+    """JWT verifier pre-configured for Azure AD / Microsoft Entra ID.
+
+    Auto-configures JWKS URI, issuer, audience, and scope handling from your
+    Azure app registration details. Designed for Managed Identity and other
+    token-verification-only scenarios where AzureProvider's full OAuth proxy
+    isn't needed.
+
+    Handles Azure's scope format automatically:
+    - Validates tokens using short-form scopes (what Azure puts in ``scp`` claims)
+    - Advertises full-URI scopes in OAuth metadata (what clients need to request)
+
+    Example::
+
+        from fastmcp.server.auth import RemoteAuthProvider
+        from fastmcp.server.auth.providers.azure import AzureJWTVerifier
+        from pydantic import AnyHttpUrl
+
+        verifier = AzureJWTVerifier(
+            client_id="your-client-id",
+            tenant_id="your-tenant-id",
+            required_scopes=["access_as_user"],
+        )
+
+        auth = RemoteAuthProvider(
+            token_verifier=verifier,
+            authorization_servers=[
+                AnyHttpUrl("https://login.microsoftonline.com/your-tenant-id/v2.0")
+            ],
+            base_url="https://my-server.com",
+        )
+    """
+
+    def __init__(
+        self,
+        *,
+        client_id: str,
+        tenant_id: str,
+        required_scopes: list[str] | None = None,
+        identifier_uri: str | None = None,
+        base_authority: str = "login.microsoftonline.com",
+    ):
+        """Initialize Azure JWT verifier.
+
+        Args:
+            client_id: Azure application (client) ID from your App registration
+            tenant_id: Azure tenant ID (specific tenant GUID, "organizations", or "consumers").
+                For multi-tenant apps ("organizations" or "consumers"), issuer validation
+                is skipped since Azure tokens carry the actual tenant GUID as issuer.
+            required_scopes: Scope names as they appear in Azure Portal under "Expose an API"
+                (e.g., ["access_as_user", "read"]). These are validated against
+                the short-form scopes in token ``scp`` claims, and automatically
+                prefixed with identifier_uri for OAuth metadata.
+            identifier_uri: Application ID URI (defaults to ``api://{client_id}``).
+                Used to prefix scopes in OAuth metadata so clients know the full
+                scope URIs to request from Azure.
+            base_authority: Azure authority base URL (defaults to "login.microsoftonline.com").
+                For Azure Government, use "login.microsoftonline.us".
+        """
+        self._identifier_uri = identifier_uri or f"api://{client_id}"
+
+        # For multi-tenant apps, Azure tokens carry the actual tenant GUID as
+        # issuer, not the literal "organizations" or "consumers" string. Skip
+        # issuer validation for these — audience still protects against wrong-app tokens.
+        multi_tenant_values = {"organizations", "consumers", "common"}
+        issuer: str | None = (
+            None
+            if tenant_id in multi_tenant_values
+            else f"https://{base_authority}/{tenant_id}/v2.0"
+        )
+
+        super().__init__(
+            jwks_uri=f"https://{base_authority}/{tenant_id}/discovery/v2.0/keys",
+            issuer=issuer,
+            audience=client_id,
+            algorithm="RS256",
+            required_scopes=required_scopes,
+        )
+
+    @property
+    def scopes_supported(self) -> list[str]:
+        """Return scopes with Azure URI prefix for OAuth metadata.
+
+        Azure tokens contain short-form scopes (e.g., ``read``) in the ``scp``
+        claim, but clients must request full URI scopes (e.g.,
+        ``api://client-id/read``) from the Azure authorization endpoint. This
+        property returns the full-URI form for OAuth metadata while
+        ``required_scopes`` retains the short form for token validation.
+        """
+        if not self.required_scopes:
+            return []
+        prefixed = []
+        for scope in self.required_scopes:
+            if scope in OIDC_SCOPES or "://" in scope or "/" in scope:
+                prefixed.append(scope)
+            else:
+                prefixed.append(f"{self._identifier_uri}/{scope}")
+        return prefixed

tests/server/auth/providers/test_azure.py

@@ -6,8 +6,12 @@
 from mcp.shared.auth import OAuthClientInformationFull
 from pydantic import AnyUrl
 
-from fastmcp.server.auth.providers.azure import OIDC_SCOPES, AzureProvider
-from fastmcp.server.auth.providers.jwt import JWTVerifier
+from fastmcp.server.auth.providers.azure import (
+    OIDC_SCOPES,
+    AzureJWTVerifier,
+    AzureProvider,
+)
+from fastmcp.server.auth.providers.jwt import JWTVerifier, RSAKeyPair
 
 
 class TestAzureProvider:
@@ -983,3 +987,138 @@ def test_extra_token_params_does_not_contain_scope(self):
             ["read", "write"]
         )
         assert len(refresh_scopes) > 0
+
+
+class TestAzureJWTVerifier:
+    """Tests for AzureJWTVerifier pre-configured JWT verifier."""
+
+    def test_auto_configures_from_client_and_tenant(self):
+        verifier = AzureJWTVerifier(
+            client_id="my-client-id",
+            tenant_id="my-tenant-id",
+            required_scopes=["access_as_user"],
+        )
+        assert (
+            verifier.jwks_uri
+            == "https://login.microsoftonline.com/my-tenant-id/discovery/v2.0/keys"
+        )
+        assert verifier.issuer == "https://login.microsoftonline.com/my-tenant-id/v2.0"
+        assert verifier.audience == "my-client-id"
+        assert verifier.algorithm == "RS256"
+        assert verifier.required_scopes == ["access_as_user"]
+
+    async def test_validates_short_form_scopes(self):
+        key_pair = RSAKeyPair.generate()
+        verifier = AzureJWTVerifier(
+            client_id="my-client-id",
+            tenant_id="my-tenant-id",
+            required_scopes=["access_as_user"],
+        )
+        # Override to use our test key instead of JWKS
+        verifier.public_key = key_pair.public_key
+        verifier.jwks_uri = None
+
+        token = key_pair.create_token(
+            subject="test-user",
+            issuer="https://login.microsoftonline.com/my-tenant-id/v2.0",
+            audience="my-client-id",
+            additional_claims={"scp": "access_as_user"},
+        )
+        result = await verifier.load_access_token(token)
+        assert result is not None
+        assert "access_as_user" in result.scopes
+
+    def test_scopes_supported_returns_prefixed_form(self):
+        verifier = AzureJWTVerifier(
+            client_id="my-client-id",
+            tenant_id="my-tenant-id",
+            required_scopes=["read", "write"],
+        )
+        assert verifier.scopes_supported == [
+            "api://my-client-id/read",
+            "api://my-client-id/write",
+        ]
+
+    def test_already_prefixed_scopes_pass_through(self):
+        verifier = AzureJWTVerifier(
+            client_id="my-client-id",
+            tenant_id="my-tenant-id",
+            required_scopes=["api://my-client-id/read"],
+        )
+        assert verifier.scopes_supported == ["api://my-client-id/read"]
+
+    def test_oidc_scopes_not_prefixed(self):
+        verifier = AzureJWTVerifier(
+            client_id="my-client-id",
+            tenant_id="my-tenant-id",
+            required_scopes=["openid", "read"],
+        )
+        assert verifier.scopes_supported == ["openid", "api://my-client-id/read"]
+
+    def test_custom_identifier_uri(self):
+        verifier = AzureJWTVerifier(
+            client_id="my-client-id",
+            tenant_id="my-tenant-id",
+            required_scopes=["read"],
+            identifier_uri="api://custom-uri",
+        )
+        assert verifier.scopes_supported == ["api://custom-uri/read"]
+
+    def test_custom_base_authority_for_gov_cloud(self):
+        verifier = AzureJWTVerifier(
+            client_id="my-client-id",
+            tenant_id="my-tenant-id",
+            required_scopes=["read"],
+            base_authority="login.microsoftonline.us",
+        )
+        assert (
+            verifier.jwks_uri
+            == "https://login.microsoftonline.us/my-tenant-id/discovery/v2.0/keys"
+        )
+        assert verifier.issuer == "https://login.microsoftonline.us/my-tenant-id/v2.0"
+
+    def test_scopes_supported_empty_when_no_required_scopes(self):
+        verifier = AzureJWTVerifier(
+            client_id="my-client-id",
+            tenant_id="my-tenant-id",
+        )
+        assert verifier.scopes_supported == []
+
+    def test_default_identifier_uri_uses_client_id(self):
+        verifier = AzureJWTVerifier(
+            client_id="abc-123",
+            tenant_id="my-tenant-id",
+            required_scopes=["read"],
+        )
+        assert verifier.scopes_supported == ["api://abc-123/read"]
+
+    def test_multi_tenant_organizations_skips_issuer(self):
+        verifier = AzureJWTVerifier(
+            client_id="my-client-id",
+            tenant_id="organizations",
+        )
+        assert verifier.issuer is None
+
+    def test_multi_tenant_consumers_skips_issuer(self):
+        verifier = AzureJWTVerifier(
+            client_id="my-client-id",
+            tenant_id="consumers",
+        )
+        assert verifier.issuer is None
+
+    def test_multi_tenant_common_skips_issuer(self):
+        verifier = AzureJWTVerifier(
+            client_id="my-client-id",
+            tenant_id="common",
+        )
+        assert verifier.issuer is None
+
+    def test_specific_tenant_sets_issuer(self):
+        verifier = AzureJWTVerifier(
+            client_id="my-client-id",
+            tenant_id="12345678-1234-1234-1234-123456789012",
+        )
+        assert (
+            verifier.issuer
+            == "https://login.microsoftonline.com/12345678-1234-1234-1234-123456789012/v2.0"
+        )