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68efe6970c
* fix(mcp): JWT on tools/list, REST server_id resolution, tool_server_mismatch
Sign outbound MCP JWTs for list_mcp_tools and inject headers on the tools/list
path. Resolve server_id on /mcp-rest/tools/call and return 403 tool_server_mismatch
when the tool does not belong to the requested server. Default missing arguments to {}.
Co-authored-by: Cursor <cursoragent@cursor.com>
* fix(mcp): restrict list JWTs to mcp:tools/list and default REST arguments to {}
- List-only JWTs (call_type=list_mcp_tools) no longer carry the broad
mcp:tools/call scope. _build_scope() now emits only mcp:tools/list
when no tool name is provided, mirroring the existing least-privilege
rule that tool-call JWTs omit mcp:tools/list.
- REST /tools/call now defaults a missing 'arguments' field to {} so
execute_mcp_tool() and downstream **arguments / .keys() calls don't
receive None and crash with TypeError/AttributeError.
Co-authored-by: Yassin Kortam <yassin@berri.ai>
* fix(mcp): validate tool/server in call_tool; skip JWT signer when not configured or static auth present
Co-authored-by: Yassin Kortam <yassin@berri.ai>
* fix(mcp): align tests and mypy with user_api_key_auth on tools/list
Update mocks for the new _get_tools_from_server parameter, mock server
registry in REST access-denied test, and narrow static_headers for mypy.
Co-authored-by: Cursor <cursoragent@cursor.com>
* fix(test): accept user_api_key_auth in get_tools_from_mcp_servers mock
The side_effect for the all-servers case did not accept the new kwarg,
so tools/list returned an empty list.
Co-authored-by: Cursor <cursoragent@cursor.com>
* fix(mcp): fail fast for unknown tools when server mapping exists
Server-name fallback in call_tool must not open an upstream session when
the tool is absent from a populated mapping. Update the HTTP transport test
to register a known tool before asserting not-found behavior.
Co-authored-by: Cursor <cursoragent@cursor.com>
* fix mypy
* Fix mypy
* fix(mcp): preserve tools/call scope on missing tool name; pass user_api_key_auth in list_tools
Co-authored-by: Yassin Kortam <yassin@berri.ai>
* fix(mcp): match alias/server_name in _resolve_mcp_server_for_tool_call
The registry lookup in _resolve_mcp_server_for_tool_call previously only
compared candidate.name against the provided server_name, but tool name
prefixes can be derived from a server's alias or server_name (see
get_server_prefix). When the tool→server mapping is empty/stale (cold
start, dynamic tools), the lookup would fail for alias-configured
servers even though get_mcp_server_by_name (used by the REST path)
matches alias, server_name, and name.
Match the same priority of identifiers in both the registry pass and
the unprefixed fallback so the MCP protocol call_tool path is
consistent with the REST path.
Co-authored-by: Yassin Kortam <yassin@berri.ai>
* fix(mcp): reuse proxy_logging DualCache in inject_mcp_jwt_headers_for_upstream
Instead of allocating a fresh DualCache() on every tools/list invocation,
prefer the shared proxy_logging_obj.internal_usage_cache.dual_cache when
available. The cache argument is currently unused by MCPJWTSigner, but
sharing the proxy's cache avoids per-call allocation overhead and matches
the cache identity used elsewhere in the proxy hook plumbing — so any
future per-request state stored in cache will survive across list calls.
Co-authored-by: Claude <noreply@anthropic.com>
* fix(mcp): return 403 ip_filtering for IP-restricted servers in tools/call name lookup
Co-authored-by: Yassin Kortam <yassin@berri.ai>
* fix(test): accept user_api_key_auth kwarg in list_tools mocks
The proxy-infra job was failing on four TestMCPServerManager tests because
the mock_get_tools_from_server stubs did not accept the new
user_api_key_auth keyword argument that list_tools now forwards to
_get_tools_from_server. Add the kwarg to each stub so list_tools can call
through cleanly.
Co-authored-by: Claude <claude@anthropic.com>
* fix(mcp): skip JWT injection when per-user mcp_auth_header is set
MCPClient._get_auth_headers() applies extra_headers AFTER writing
Authorization from auth_value, so an injected JWT silently overwrites
the user's per-server OAuth token. Guard the JWT signer with
'not mcp_auth_header' so per-user OAuth (and any dict-form per-user
auth) takes precedence, mirroring the existing static_headers guard.
Adds a regression test that the signer's inject helper is not called
when mcp_auth_header is supplied.
* fix(mcp): skip JWT injection when extra_headers already has Authorization
When a server uses per-user OAuth tokens, the resolved token is passed
into _get_tools_from_server via extra_headers. The JWT injection guard
only checked mcp_auth_header and the server's static headers, so the
signer would silently overwrite the user's OAuth Authorization header.
Add a check for an existing Authorization entry in extra_headers so
caller-supplied per-user OAuth tokens take precedence over JWT signing.
Co-authored-by: Yassin Kortam <yassin@berri.ai>
* test(mcp): cover JWT signer + tool-call resolution branches
Adds unit tests for the new MCPServerManager helpers (_resolve_mcp_server_for_tool_call,
_resolve_oauth2_headers_for_tool_call) and the new MCPJWTSigner paths
(_build_scope call_type branches and inject_mcp_jwt_headers_for_upstream).
Brings patch coverage above the auto target without changing behavior.
Co-authored-by: Claude <claude@anthropic.com>
* fix(mcp): retry tool-server lookup with prefixed name in REST mismatch check
When the REST /mcp-rest/tools/call path sends a raw tool name plus
requested_server_id, _get_mcp_server_from_tool_name(name) can return
None if the mapping only stores the prefixed form. That bypassed the
tool_server_mismatch 403 guard and let the call fall through to
trusting requested_server.
Retry the lookup with every known prefix of the requested server so
the mismatch check fires whenever the tool is actually registered.
Co-authored-by: Yassin Kortam <yassin@berri.ai>
* fix(mcp): always reject unknown tools in server-name fallback
Defense-in-depth: _resolve_mcp_server_for_tool_call previously skipped
the unknown-tool check whenever the per-server mapping had no entries
yet (cold start, OAuth2 lazy listing, or upstream listing failure),
allowing arbitrary tool names to reach upstream servers.
Tighten the check so the server-name fallback always rejects tool
names not present in the mapping. Callers must call list_tools first
(standard MCP flow) before tools/call can resolve. Removes the
now-unused _mapping_has_tools_for_server helper and adds an
explicit empty-mapping rejection test alongside the existing
populated-mapping rejection test.
Co-authored-by: Sameer Kankute <sameer@berri.ai>
---------
Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Yassin Kortam <yassin@berri.ai>
Co-authored-by: Claude <claude@anthropic.com>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Claude (greptile subagent) <claude-greptile-bot@anthropic.com>