feat: add tool test panel for HTTP API tools (#547)

* feat: add tool test panel for HTTP API tools

Lets developers run a saved HTTP API tool against its real endpoint
from the tool detail page, without needing a live call. Reuses the
production execute_http_tool path so test behavior matches call-time
behavior.

- New POST /tools/{tool_uuid}/test route
- Test panel with per-parameter typed inputs and auto-detected
  context variable inputs (from preset parameter templates)
- Validate parameter name uniqueness on save, matching the existing
  transferParameters check
- Fix stale FunctionCallsFromLLMInfoFrame import causing test
  collection failures against pipecat-ai 1.5.0

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix: revert local-venv pipecat drift fix, apply ruff import formatting

test_custom_tools.py and test_unregistered_function_call.py were edited
locally to drop FunctionCallsFromLLMInfoFrame after hitting an
ImportError — that error was from a stale local pipecat-ai package, not
a real drift. CI's pipecat build emits this frame and the test asserted
on it, so removing it broke test_llm_calls_custom_tool_handler and its
unregistered-call counterpart. Reverted both files to match main.

Also applied ruff's import-sort/format fix to test_mcp_tool_route.py to
clear the drift-check job (split the aliased import into its own
`from ... import (...)` block, wrapped a long monkeypatch.setattr call).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix: avoid pytest collecting test_tool import as a test, sync OpenAPI spec

pytest's default discovery matches any top-level test_* name in a test
module, including imported functions — importing the route handler as
`test_tool as test_tool_route` still matched the pattern, so pytest
tried to run it as a test and failed injecting fixtures for tool_uuid/
request/user. Renamed the alias to call_test_tool_route.

Also regenerated docs/api-reference/openapi.json for the new
POST /tools/{tool_uuid}/test route and its two schemas (couldn't run
the dump script locally — pipecat-ai version mismatch documented
separately — so hand-built the diff to exactly match FastAPI's
get_openapi() output format, verified against neighboring routes).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix: address cubic review findings on test panel

- Resolve dotted context-variable keys into nested objects before
  posting the test request. render_template's get_nested_value walks
  nested dicts, so a flat key like "runtime_configuration.realtime_model"
  never matched — templates referencing nested context always resolved
  to empty.
- Restrict isHttpApiTool to an explicit category equality check instead
  of inferring it from exclusions. native/integration tools are
  currently disabled in the create-tool UI so this wasn't reachable
  today, but the exclusion list silently goes stale as new categories
  are added.
- Stop showing a green success badge for non-2xx responses.
  execute_http_tool returns status: "success" for any HTTP exchange
  that completes, regardless of status code — only transport-level
  errors (timeout, connection failure) get status: "error". The test
  panel now checks status_code is in the 2xx range before treating the
  call as a success.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix: address second round of cubic/greptile findings

- Guard setNestedValue against prototype-pollution keys (__proto__,
  constructor, prototype) in the dotted context-var path before
  traversing.
- Normalize status to "error" in the test route when the upstream
  status_code is >= 400. execute_http_tool only distinguishes
  transport-level failures (timeout, connection error) from
  "success" — a completed 4xx/5xx exchange still came back as
  "success" from the executor.
- Seed testArgValues defaults for number/boolean parameters via a
  useEffect keyed on the parameters array, so a required number or
  boolean field isn't silently omitted from the test request if the
  user never touches its input.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix: only seed test-arg defaults for required number/boolean params

Seeding optional number/boolean parameters silently changed the test
request — an optional boolean flag the tester never touched was sent
as true, which can flip upstream behavior unintentionally. Restrict
seeding to required parameters.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix: match whitespace and fallback-filter syntax in context var detection

extractContextVars required an exact {{initial_context.foo}} with no
whitespace and no filter suffix, but the backend's TEMPLATE_VAR_PATTERN
(and render_template) accepts {{ initial_context.foo }} and
{{initial_context.foo | fallback:value}}. A preset parameter saved with
either of those forms resolved fine in production but showed no input
in the test panel, so testing always sent it empty context.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat(tool-test): add hint and request_* fields to ToolTestResponse

Extends ToolTestResponse with hint, request_method, request_url,
request_body, and request_params so the frontend can surface what was
actually sent and a human-readable hint about why a test call failed.

* feat(tool-test): add status-code hints and request_method/url/body/params to test_tool()

* style: ruff-format test_mcp_tool_route.py

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat(tool-test): wire hint banner and request block into result panel

Backend has returned hint/request_method/request_url/request_body/
request_params since d45ea851/60aaf31d but the frontend never
displayed them. Extends ToolTestResult with the new fields and renders
an amber hint banner (for 400/401/403/404/405/408/409/415/422/429/5xx)
plus a Request block above the response showing exactly what was sent.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix(tool-test): include resolved preset params in request_body/params

Found via live GET/POST testing: the Request preview showed only the
model-provided arguments, not what execute_http_tool actually sends.
execute_http_tool merges resolved_arguments = {**arguments,
**preset_arguments} before building the outbound body/params — preset
params (e.g. {{initial_context.metadata.channel}}) are invisible to
the model but still go out on the wire. The preview now mirrors that
merge via the same _resolve_preset_parameters helper, so a dev sees
exactly what was sent, not just what the model provided.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat(tool-test): add generateSampleValue helper for sample-fill button

* feat(tool-test): add Fill sample values button for arguments and context vars

Moved generateSampleValue out of page.tsx into a sibling helpers module:
Next.js's typed-route checker rejects extra named exports on a page.tsx
file (tsc error TS2344 on .next/types), so the helper and its test import
now live in testPanelHelpers.ts instead.

* feat(tool-test): add JSON edit modal state and handlers

* feat(tool-test): collapsed preview + edit modal for object/array test parameters

* fix(tool-test): validate JSON on modal open, not just on edit

Opening the JSON edit modal on an untouched object/array param (no value
yet in testArgValues) loaded an empty draft with jsonEditError hardcoded
to null, so Save was enabled despite invalid JSON and silently no-op'd on
click. Now runs the same JSON.parse check used by the live textarea
validation when the modal opens.

* chore: regenerate openapi.json for ToolTestResponse hint/request_* fields

drift-check on PR #547 was failing because the earlier hint/request_method/
request_url/request_body/request_params fields added to ToolTestResponse
were never reflected in the dumped spec. Regenerated via
scripts.dump_docs_openapi.

* fix(tool-test): serialize object/array args for GET/DELETE query params, add unsaved-changes banner

httpx raises a TypeError when a query param value is a dict/list, which
was silently caught and surfaced as a generic tool-execution error —
this is what actually broke test requests, not just the "[object
Object]" display. JSON-stringify object/array arguments before they
become query params, in both the live execute_http_tool() path and the
test route's request_params display shaping.

Also adds an unsaved-changes warning banner above Test Tool, shown
when the live form state diverges from the last-saved HTTP API config,
since Test Tool always runs the saved config.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

* fix(tool-test): keep empty request body in preview; normalize headers in snapshot

- POST/PUT/PATCH with no arguments now shows `{}` in the request body
  preview instead of null — matches what execute_http_tool actually sends
  over the wire (json={})
- buildHttpToolTestSnapshot normalizes headers from KeyValueItem[] to a
  deduped key→value map before serializing, matching the shape saved to
  the backend; duplicate header keys no longer cause a false unsaved-
  changes warning

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* test(tool-test): update assertion for empty POST body preview

test_tool_test_no_arguments_leaves_body_and_params_none expected
request_body=None for a POST with no arguments. The fix to preserve {}
in the preview makes request_body={} the correct assertion.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat(tools): refine HTTP tool testing

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-authored-by: Abhishek Kumar <abhishek@a6k.me>

api/tests/test_custom_tools.py

@@ -30,6 +30,7 @@ from pipecat.processors.aggregators.llm_context import LLMContext
 from pipecat.services.llm_service import FunctionCallParams
 
 from api.enums import WorkflowRunMode
+from api.services.configuration.masking import mask_key
 from api.services.workflow.pipecat_engine_custom_tools import get_function_schema
 from api.services.workflow.tools.custom_tool import (
     _coerce_parameter_value,
@@ -430,6 +431,7 @@ class TestExecuteHttpTool:
             assert result["status"] == "success"
             assert result["status_code"] == 201
             assert result["data"]["id"] == 123
+            assert "request_headers" not in result
 
     @pytest.mark.asyncio
     async def test_post_request_sends_nested_json_body(self):
@@ -546,6 +548,55 @@ class TestExecuteHttpTool:
             }
             assert result["status"] == "success"
 
+    @pytest.mark.asyncio
+    async def test_post_request_accepts_pre_resolved_preset_params(self):
+        """The test endpoint can supply preset values without call context."""
+        tool = MockToolModel(
+            tool_uuid="test-uuid-preset-override",
+            name="Create Lead",
+            description="Create a lead with caller context",
+            category="http_api",
+            definition={
+                "schema_version": 1,
+                "type": "http_api",
+                "config": {
+                    "method": "POST",
+                    "url": "https://api.example.com/leads",
+                    "timeout_ms": 5000,
+                    "preset_parameters": [
+                        {
+                            "name": "phone_number",
+                            "type": "string",
+                            "value_template": "{{initial_context.phone_number}}",
+                            "required": True,
+                        }
+                    ],
+                },
+            },
+        )
+
+        with patch(
+            "api.services.workflow.tools.custom_tool.httpx.AsyncClient"
+        ) as mock_client_class:
+            mock_client = AsyncMock()
+            mock_response = Mock()
+            mock_response.status_code = 201
+            mock_response.json.return_value = {"id": 123}
+            mock_client.request.return_value = mock_response
+            mock_client_class.return_value.__aenter__.return_value = mock_client
+
+            result = await execute_http_tool(
+                tool,
+                {"name": "John"},
+                preset_params={"phone_number": "+14155550123"},
+            )
+
+            assert mock_client.request.call_args.kwargs["json"] == {
+                "name": "John",
+                "phone_number": "+14155550123",
+            }
+            assert result["status"] == "success"
+
     @pytest.mark.asyncio
     async def test_missing_required_preset_parameter_returns_error(self):
         """Test that required preset parameters fail before the HTTP request."""
@@ -619,6 +670,52 @@ class TestExecuteHttpTool:
 
             assert result["status"] == "success"
 
+    @pytest.mark.asyncio
+    async def test_get_request_serializes_object_and_array_query_params(self):
+        """Object/array-typed arguments must be JSON-stringified for GET query
+        params — httpx raises a TypeError if a dict/list is passed as-is."""
+        tool = MockToolModel(
+            tool_uuid="test-uuid",
+            name="Search Users",
+            description="Search for users",
+            category="http_api",
+            definition={
+                "schema_version": 1,
+                "type": "http_api",
+                "config": {
+                    "method": "GET",
+                    "url": "https://api.example.com/users/search",
+                    "timeout_ms": 5000,
+                },
+            },
+        )
+
+        arguments = {
+            "source": "voice",
+            "metadata": {"campaign": "spring"},
+            "tags": ["a", "b"],
+        }
+
+        with patch(
+            "api.services.workflow.tools.custom_tool.httpx.AsyncClient"
+        ) as mock_client_class:
+            mock_client = AsyncMock()
+            mock_response = Mock()
+            mock_response.status_code = 200
+            mock_response.json.return_value = {"users": []}
+            mock_client.request.return_value = mock_response
+            mock_client_class.return_value.__aenter__.return_value = mock_client
+
+            result = await execute_http_tool(tool, arguments)
+
+            call_kwargs = mock_client.request.call_args.kwargs
+            assert call_kwargs["params"] == {
+                "source": "voice",
+                "metadata": '{"campaign": "spring"}',
+                "tags": '["a", "b"]',
+            }
+            assert result["status"] == "success"
+
     @pytest.mark.asyncio
     async def test_get_request_without_arguments_preserves_url_query_params(self):
         """Empty runtime args should not override query params already in the URL."""
@@ -762,11 +859,17 @@ class TestExecuteHttpTool:
             mock_client.request.return_value = mock_response
             mock_client_class.return_value.__aenter__.return_value = mock_client
 
-            await execute_http_tool(tool, {"data": "test"})
+            result = await execute_http_tool(
+                tool, {"data": "test"}, include_request_headers=True
+            )
 
             call_kwargs = mock_client.request.call_args.kwargs
             assert call_kwargs["headers"]["X-API-Key"] == "secret-key"
             assert call_kwargs["headers"]["X-Custom-Header"] == "custom-value"
+            assert result["request_headers"] == {
+                "X-API-Key": "secret-key",
+                "X-Custom-Header": "custom-value",
+            }
 
     @pytest.mark.asyncio
     async def test_request_includes_auth_header_from_credential(self):
@@ -807,7 +910,12 @@ class TestExecuteHttpTool:
             with patch("api.services.workflow.tools.custom_tool.db_client") as mock_db:
                 mock_db.get_credential_by_uuid = AsyncMock(return_value=mock_credential)
 
-                await execute_http_tool(tool, {"data": "test"}, organization_id=1)
+                result = await execute_http_tool(
+                    tool,
+                    {"data": "test"},
+                    organization_id=1,
+                    include_request_headers=True,
+                )
 
                 # Verify credential was fetched
                 mock_db.get_credential_by_uuid.assert_called_once_with(
@@ -819,6 +927,12 @@ class TestExecuteHttpTool:
                 assert (
                     call_kwargs["headers"]["Authorization"] == "Bearer my-secret-token"
                 )
+                assert result["request_headers"]["Authorization"] == mask_key(
+                    "Bearer my-secret-token"
+                )
+                assert (
+                    "my-secret-token" not in result["request_headers"]["Authorization"]
+                )
 
     @pytest.mark.asyncio
     async def test_no_credential_lookup_without_organization_id(self):