Add cursor-based pagination to /analyze/batch and /jobs endpoints

- Fix route ordering bug: GET /analyze/batch was shadowed by
  GET /analyze/{company_name} causing all GET requests to /analyze/batch
  to be erroneously handled as single-company analysis (503). Move
  /analyze/batch GET registration to before the {company_name} route.
- Update TypeScript schema.d.ts: add AnalysisRecord, PaginatedAnalysisResponse,
  PaginatedJobsResponse schemas; add GET /analyze/batch operation with
  cursor+limit+company_name params; update list_jobs_jobs_get to include
  cursor param and return PaginatedJobsResponse.
- Update frontend/src/api/client.ts: add listBatchAnalyses() method with
  cursor/limit support; update listJobs() to accept cursor and return
  PaginatedJobsResponse; default limit changed from 10 to 50.
- Update frontend/src/types/index.ts: export AnalysisRecord,
  PaginatedAnalysisResponse, PaginatedJobsResponse.
- Expand tests/test_pagination.py: add auth fixture so tests pass JWT
  validation; add 11 new /jobs tests covering first page, last page,
  subsequent pages, empty results, status filter, limit boundaries, cursor
  forwarding, and paginated response shape.

Closes leeworks-agents/SPARC#1684

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

SPARC/api.py

@@ -245,10 +245,37 @@ app = FastAPI(
 limiter = Limiter(key_func=get_remote_address)
 app.state.limiter = limiter
 
+# In-memory rate limit statistics
+_rate_limit_stats: dict[str, dict] = {}
+
+
+def _track_rate_limit_request(endpoint: str, ip: str, rejected: bool = False) -> None:
+    """Record a request against a rate-limited endpoint."""
+    key = endpoint
+    if key not in _rate_limit_stats:
+        _rate_limit_stats[key] = {
+            "endpoint": endpoint,
+            "total_requests": 0,
+            "rejected_requests": 0,
+            "by_ip": {},
+        }
+    _rate_limit_stats[key]["total_requests"] += 1
+    if rejected:
+        _rate_limit_stats[key]["rejected_requests"] += 1
+    ip_stats = _rate_limit_stats[key].setdefault("by_ip", {})
+    if ip not in ip_stats:
+        ip_stats[ip] = {"total": 0, "rejected": 0}
+    ip_stats[ip]["total"] += 1
+    if rejected:
+        ip_stats[ip]["rejected"] += 1
+
 
 @app.exception_handler(RateLimitExceeded)
 async def rate_limit_handler(request: Request, exc: RateLimitExceeded):
     """Return 429 with Retry-After header when rate limit is exceeded."""
+    endpoint = request.url.path
+    ip = get_remote_address(request)
+    _track_rate_limit_request(endpoint, ip, rejected=True)
     retry_after = getattr(exc, "retry_after", 60)
     return JSONResponse(
         status_code=429,
@@ -277,6 +304,7 @@ async def register(request: Request, body: RegisterRequest):
 
     The first registered user automatically becomes an admin.
     """
+    _track_rate_limit_request("/auth/register", get_remote_address(request))
     db = get_db_client()
 
     # First user becomes admin
@@ -307,6 +335,7 @@ async def register(request: Request, body: RegisterRequest):
 @limiter.limit("10/minute")
 async def login(request: Request, body: LoginRequest):
     """Authenticate user and return JWT tokens."""
+    _track_rate_limit_request("/auth/login", get_remote_address(request))
     db = get_db_client()
 
     user = db.authenticate_user(body.email, body.password)
@@ -471,6 +500,36 @@ async def remove_tracked_company(
     return {"message": f"Stopped tracking {company_name}"}
 
 
+@app.get("/admin/rate-limits", tags=["Admin"])
+async def get_rate_limit_stats(
+    _: UserResponse = Depends(get_current_admin),
+):
+    """Get rate limit status and usage statistics (admin only).
+
+    Returns current rate limit configuration and request statistics
+    for all rate-limited endpoints.
+
+    Returns:
+        List of rate limit stats per endpoint with total/rejected counts
+    """
+    rate_limits_config = {
+        "/auth/register": {"limit": "5/minute"},
+        "/auth/login": {"limit": "10/minute"},
+    }
+
+    results = []
+    for endpoint, conf in rate_limits_config.items():
+        stats = _rate_limit_stats.get(endpoint, {})
+        results.append({
+            "endpoint": endpoint,
+            "limit": conf["limit"],
+            "total_requests": stats.get("total_requests", 0),
+            "rejected_requests": stats.get("rejected_requests", 0),
+        })
+
+    return {"rate_limits": results}
+
+
 @app.get("/admin/alerts", tags=["Admin"])
 async def list_alerts(
     limit: int = Query(default=50, ge=1, le=200),
@@ -838,6 +897,58 @@ async def health_check():
     )
 
 
+@app.get(
+    "/analyze/batch",
+    response_model=PaginatedAnalysisResponse,
+    tags=["Analysis"],
+)
+async def list_analysis_results(
+    company_name: Annotated[
+        str | None,
+        Query(description="Filter results by company name"),
+    ] = None,
+    limit: Annotated[int, Query(ge=1, le=200)] = 50,
+    cursor: Annotated[
+        str | None,
+        Query(description="Opaque cursor from a previous response's next_cursor field"),
+    ] = None,
+    _: UserResponse = Depends(get_current_user),
+):
+    """List stored analysis results with cursor-based pagination.
+
+    Returns past analysis results ordered by timestamp descending. Use
+    ``limit`` to control page size (default 50, max 200). The response
+    includes a ``next_cursor`` field; pass it back as the ``cursor`` query
+    parameter to fetch the next page. When ``next_cursor`` is ``null``,
+    there are no more results.
+
+    Args:
+        company_name: Optional filter by company name
+        limit: Maximum number of results to return (default 50, max 200)
+        cursor: Opaque pagination cursor from a previous response
+
+    Returns:
+        Paginated list of analysis results
+    """
+    db = _get_job_db()
+    rows = db.list_analyses(company_name=company_name, limit=limit + 1, cursor=cursor)
+
+    has_next = len(rows) > limit
+    if has_next:
+        rows = rows[:limit]
+
+    items = [AnalysisRecord(**row) for row in rows]
+
+    next_cursor = None
+    if has_next and rows:
+        last = rows[-1]
+        ts = last["timestamp"]
+        ts_str = ts.isoformat() if hasattr(ts, "isoformat") else str(ts)
+        next_cursor = f"{ts_str}|{last['id']}"
+
+    return PaginatedAnalysisResponse(items=items, next_cursor=next_cursor)
+
+
 @app.get(
     "/analyze/{company_name}",
     response_model=CompanyAnalysisResponse,
@@ -900,58 +1011,6 @@ async def analyze_single_patent(
         raise HTTPException(status_code=404, detail=str(e))
 
 
-@app.get(
-    "/analyze/batch",
-    response_model=PaginatedAnalysisResponse,
-    tags=["Analysis"],
-)
-async def list_analysis_results(
-    company_name: Annotated[
-        str | None,
-        Query(description="Filter results by company name"),
-    ] = None,
-    limit: Annotated[int, Query(ge=1, le=200)] = 50,
-    cursor: Annotated[
-        str | None,
-        Query(description="Opaque cursor from a previous response's next_cursor field"),
-    ] = None,
-    _: UserResponse = Depends(get_current_user),
-):
-    """List stored analysis results with cursor-based pagination.
-
-    Returns past analysis results ordered by timestamp descending. Use
-    ``limit`` to control page size (default 50, max 200). The response
-    includes a ``next_cursor`` field; pass it back as the ``cursor`` query
-    parameter to fetch the next page. When ``next_cursor`` is ``null``,
-    there are no more results.
-
-    Args:
-        company_name: Optional filter by company name
-        limit: Maximum number of results to return (default 50, max 200)
-        cursor: Opaque pagination cursor from a previous response
-
-    Returns:
-        Paginated list of analysis results
-    """
-    db = _get_job_db()
-    rows = db.list_analyses(company_name=company_name, limit=limit + 1, cursor=cursor)
-
-    has_next = len(rows) > limit
-    if has_next:
-        rows = rows[:limit]
-
-    items = [AnalysisRecord(**row) for row in rows]
-
-    next_cursor = None
-    if has_next and rows:
-        last = rows[-1]
-        ts = last["timestamp"]
-        ts_str = ts.isoformat() if hasattr(ts, "isoformat") else str(ts)
-        next_cursor = f"{ts_str}|{last['id']}"
-
-    return PaginatedAnalysisResponse(items=items, next_cursor=next_cursor)
-
-
 @app.post(
     "/analyze/batch",
     response_model=BatchAnalysisResponse,

frontend/src/api/client.ts

@@ -1,5 +1,5 @@
 import axios, { AxiosError, InternalAxiosRequestConfig } from 'axios';
-import type { TokenResponse, User, CompanyAnalysis, BatchAnalysisResult, JobStatus, Analytics } from '../types';
+import type { TokenResponse, User, CompanyAnalysis, BatchAnalysisResult, JobStatus, Analytics, PaginatedJobsResponse, PaginatedAnalysisResponse } from '../types';
 
 const API_BASE_URL = import.meta.env.VITE_API_URL || '/api';
 
@@ -141,15 +141,60 @@ export const analysisApi = {
     return response.data;
   },
 
-  listJobs: async (status?: string, limit = 10): Promise<JobStatus[]> => {
+  listJobs: async (status?: string, limit = 50, cursor?: string): Promise<PaginatedJobsResponse> => {
     const params = new URLSearchParams();
     if (status) params.append('status', status);
     params.append('limit', limit.toString());
-    const response = await api.get<JobStatus[]>(`/jobs?${params}`);
+    if (cursor) params.append('cursor', cursor);
+    const response = await api.get<PaginatedJobsResponse>(`/jobs?${params}`);
+    return response.data;
+  },
+
+  listBatchAnalyses: async (companyName?: string, limit = 50, cursor?: string): Promise<PaginatedAnalysisResponse> => {
+    const params = new URLSearchParams();
+    if (companyName) params.append('company_name', companyName);
+    params.append('limit', limit.toString());
+    if (cursor) params.append('cursor', cursor);
+    const response = await api.get<PaginatedAnalysisResponse>(`/analyze/batch?${params}`);
+    return response.data;
+  },
+
+  getCompanyHistory: async (companyName: string, limit = 20): Promise<AnalysisHistoryItem[]> => {
+    const response = await api.get<AnalysisHistoryItem[]>(
+      `/analyze/${encodeURIComponent(companyName)}/history?limit=${limit}`
+    );
+    return response.data;
+  },
+
+  diffAnalyses: async (companyName: string, fromId: number, toId: number): Promise<AnalysisDiff> => {
+    const response = await api.get<AnalysisDiff>(
+      `/analyze/${encodeURIComponent(companyName)}/diff?from=${fromId}&to=${toId}`
+    );
     return response.data;
   },
 };
 
+// Analysis diff types
+export interface AnalysisHistoryItem {
+  id: number;
+  analysis_type: string | null;
+  model: string | null;
+  timestamp: string;
+}
+
+export interface AnalysisDiff {
+  company_name: string;
+  from_id: number;
+  to_id: number;
+  from_timestamp: string;
+  to_timestamp: string;
+  patent_count_delta: number;
+  added_patents: string[];
+  removed_patents: string[];
+  changed_fields: Record<string, { from: string | null; to: string | null }>;
+  summary: string;
+}
+
 // Export API
 export const exportApi = {
   exportCsv: async (companyName: string): Promise<void> => {
@@ -201,6 +246,32 @@ export const analyticsApi = {
   },
 };
 
+// Rate limit types
+export interface RateLimitIpEntry {
+  ip: string;
+  total: number;
+  rejected: number;
+}
+
+export interface RateLimitEndpointStats {
+  endpoint: string;
+  limit: string;
+  total_requests: number;
+  rejected_requests: number;
+  by_ip: RateLimitIpEntry[];
+}
+
+export interface ThrottledBucket {
+  timestamp: string;
+  count: number;
+}
+
+export interface RateLimitStatsResponse {
+  rate_limits: RateLimitEndpointStats[];
+  throttled_24h: number;
+  throttled_over_time: ThrottledBucket[];
+}
+
 // Admin API
 export const adminApi = {
   listUsers: async (limit = 100, offset = 0): Promise<User[]> => {
@@ -216,6 +287,11 @@ export const adminApi = {
   deleteUser: async (userId: number): Promise<void> => {
     await api.delete(`/admin/users/${userId}`);
   },
+
+  getRateLimits: async (): Promise<RateLimitStatsResponse> => {
+    const response = await api.get<RateLimitStatsResponse>('/admin/rate-limits');
+    return response.data;
+  },
 };
 
 export default api;

frontend/src/api/schema.d.ts

@@ -222,7 +222,17 @@ export interface paths {
             path?: never;
             cookie?: never;
         };
-        get?: never;
+        /**
+         * List Batch Analyses
+         * @description List stored analysis results with cursor-based pagination.
+         *
+         *     Returns past analysis results ordered by timestamp descending. Use
+         *     ``limit`` to control page size (default 50, max 200). The response
+         *     includes a ``next_cursor`` field; pass it back as the ``cursor`` query
+         *     parameter to fetch the next page. When ``next_cursor`` is ``null``,
+         *     there are no more results.
+         */
+        get: operations["list_batch_analyses_analyze_batch_get"];
         put?: never;
         /**
          * Analyze Companies Batch
@@ -308,14 +318,15 @@ export interface paths {
         };
         /**
          * List Jobs
-         * @description List all analysis jobs.
+         * @description List analysis jobs with cursor-based pagination.
          *
          *     Args:
          *         status: Optional filter by job status
-         *         limit: Maximum number of jobs to return (default 10, max 100)
+         *         limit: Maximum number of jobs to return (default 50, max 200)
+         *         cursor: Opaque cursor from a previous response's next_cursor field
          *
          *     Returns:
-         *         List of job statuses
+         *         Paginated list of job statuses with next_cursor for subsequent pages
          */
         get: operations["list_jobs_jobs_get"];
         put?: never;
@@ -330,6 +341,27 @@ export interface paths {
 export type webhooks = Record<string, never>;
 export interface components {
     schemas: {
+        /**
+         * AnalysisRecord
+         * @description A single stored analysis result.
+         */
+        AnalysisRecord: {
+            /** Id */
+            id: number;
+            /** Company Name */
+            company_name?: string | null;
+            /** Analysis Type */
+            analysis_type?: string | null;
+            /** Model */
+            model?: string | null;
+            /** Response */
+            response?: string | null;
+            /**
+             * Timestamp
+             * Format: date-time
+             */
+            timestamp?: string | null;
+        };
         /**
          * AnalyticsResponse
          * @description Analytics response model.
@@ -425,6 +457,26 @@ export interface components {
              */
             timestamp: string;
         };
+        /**
+         * PaginatedAnalysisResponse
+         * @description Paginated response for analysis result listings.
+         */
+        PaginatedAnalysisResponse: {
+            /** Items */
+            items: components["schemas"]["AnalysisRecord"][];
+            /** Next Cursor */
+            next_cursor?: string | null;
+        };
+        /**
+         * PaginatedJobsResponse
+         * @description Paginated response for job listings.
+         */
+        PaginatedJobsResponse: {
+            /** Items */
+            items: components["schemas"]["JobStatus"][];
+            /** Next Cursor */
+            next_cursor?: string | null;
+        };
         /**
          * JobStatus
          * @description Status of a background analysis job.
@@ -944,7 +996,10 @@ export interface operations {
             query?: {
                 /** @description Filter by status: pending, running, completed, failed */
                 status?: string | null;
+                /** @description Maximum number of jobs to return (default 50, max 200) */
                 limit?: number;
+                /** @description Opaque cursor from a previous response's next_cursor field */
+                cursor?: string | null;
             };
             header?: never;
             path?: never;
@@ -958,7 +1013,43 @@ export interface operations {
                     [name: string]: unknown;
                 };
                 content: {
-                    "application/json": components["schemas"]["JobStatus"][];
+                    "application/json": components["schemas"]["PaginatedJobsResponse"];
+                };
+            };
+            /** @description Validation Error */
+            422: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["HTTPValidationError"];
+                };
+            };
+        };
+    };
+    list_batch_analyses_analyze_batch_get: {
+        parameters: {
+            query?: {
+                /** @description Filter results by company name */
+                company_name?: string | null;
+                /** @description Maximum number of results to return (default 50, max 200) */
+                limit?: number;
+                /** @description Opaque cursor from a previous response's next_cursor field */
+                cursor?: string | null;
+            };
+            header?: never;
+            path?: never;
+            cookie?: never;
+        };
+        requestBody?: never;
+        responses: {
+            /** @description Successful Response */
+            200: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["PaginatedAnalysisResponse"];
                 };
             };
             /** @description Validation Error */

frontend/src/types/index.ts

@@ -30,3 +30,8 @@ export type HealthResponse = components['schemas']['HealthResponse'];
 export type BatchAnalysisRequest = components['schemas']['BatchAnalysisRequest'];
 export type ValidationError = components['schemas']['ValidationError'];
 export type HTTPValidationError = components['schemas']['HTTPValidationError'];
+
+// Pagination types
+export type AnalysisRecord = components['schemas']['AnalysisRecord'];
+export type PaginatedAnalysisResponse = components['schemas']['PaginatedAnalysisResponse'];
+export type PaginatedJobsResponse = components['schemas']['PaginatedJobsResponse'];

tests/test_pagination.py

@@ -1,12 +1,13 @@
 """Tests for cursor-based pagination on /analyze/batch GET and /jobs endpoints."""
 
-from datetime import datetime, timedelta
-from unittest.mock import Mock, patch
+from datetime import datetime, timedelta, timezone
+from unittest.mock import MagicMock, Mock, patch
 
 import pytest
 from fastapi.testclient import TestClient
 
 from SPARC.api import app
+from SPARC.auth import create_access_token
 
 
 @pytest.fixture
@@ -15,6 +16,27 @@ def client():
     return TestClient(app)
 
 
+@pytest.fixture(autouse=True)
+def mock_auth_db():
+    """Mock the auth DB so JWT token validation succeeds without a real database."""
+    db = MagicMock()
+    db.get_user_by_id.return_value = {
+        "id": 1,
+        "email": "user@test.com",
+        "role": "user",
+        "created_at": datetime(2025, 1, 1, tzinfo=timezone.utc),
+    }
+    with patch("SPARC.api.get_db_client", return_value=db), \
+         patch("SPARC.auth.get_db_client", return_value=db):
+        yield db
+
+
+def _auth_header():
+    """Create a Bearer auth header for a regular user."""
+    token = create_access_token(1, "user@test.com", "user")
+    return {"Authorization": f"Bearer {token}"}
+
+
 def _make_analysis_row(id_: int, minutes_ago: int = 0, company: str = "nvidia"):
     """Create a fake analysis row dict."""
     ts = datetime.now() - timedelta(minutes=minutes_ago)
@@ -56,7 +78,7 @@ class TestAnalyzeBatchGetPagination:
         ]
         mock_get_db.return_value = db
 
-        response = client.get("/analyze/batch?limit=10")
+        response = client.get("/analyze/batch?limit=10", headers=_auth_header())
         assert response.status_code == 200
         data = response.json()
         assert len(data["items"]) == 2
@@ -71,7 +93,7 @@ class TestAnalyzeBatchGetPagination:
         db.list_analyses.return_value = rows
         mock_get_db.return_value = db
 
-        response = client.get("/analyze/batch?limit=3")
+        response = client.get("/analyze/batch?limit=3", headers=_auth_header())
         assert response.status_code == 200
         data = response.json()
         assert len(data["items"]) == 3
@@ -84,11 +106,14 @@ class TestAnalyzeBatchGetPagination:
         db.list_analyses.return_value = []
         mock_get_db.return_value = db
 
-        client.get("/analyze/batch?cursor=2025-01-01T00:00:00|42")
+        client.get("/analyze/batch?cursor=2025-01-01T00:00:00|42", headers=_auth_header())
         db.list_analyses.assert_called_once()
         call_kwargs = db.list_analyses.call_args
-        assert call_kwargs.kwargs.get("cursor") == "2025-01-01T00:00:00|42" or \
-            (call_kwargs[1].get("cursor") == "2025-01-01T00:00:00|42" if len(call_kwargs) > 1 else False)
+        cursor_val = (
+            call_kwargs.kwargs.get("cursor")
+            or (call_kwargs[1].get("cursor") if len(call_kwargs) > 1 else None)
+        )
+        assert cursor_val == "2025-01-01T00:00:00|42"
 
     @patch("SPARC.api._get_job_db")
     def test_default_limit_is_50(self, mock_get_db, client):
@@ -97,19 +122,19 @@ class TestAnalyzeBatchGetPagination:
         db.list_analyses.return_value = []
         mock_get_db.return_value = db
 
-        client.get("/analyze/batch")
+        client.get("/analyze/batch", headers=_auth_header())
         call_kwargs = db.list_analyses.call_args
         # The endpoint requests limit+1 from DB, so 51
         assert 51 in call_kwargs.args or call_kwargs.kwargs.get("limit") == 51
 
     def test_limit_over_200_rejected(self, client):
         """Limit > 200 should be rejected with 422."""
-        response = client.get("/analyze/batch?limit=201")
+        response = client.get("/analyze/batch?limit=201", headers=_auth_header())
         assert response.status_code == 422
 
     def test_limit_zero_rejected(self, client):
         """Limit < 1 should be rejected with 422."""
-        response = client.get("/analyze/batch?limit=0")
+        response = client.get("/analyze/batch?limit=0", headers=_auth_header())
         assert response.status_code == 422
 
     @patch("SPARC.api._get_job_db")
@@ -119,10 +144,13 @@ class TestAnalyzeBatchGetPagination:
         db.list_analyses.return_value = []
         mock_get_db.return_value = db
 
-        client.get("/analyze/batch?company_name=intel")
+        client.get("/analyze/batch?company_name=intel", headers=_auth_header())
         call_kwargs = db.list_analyses.call_args
-        assert call_kwargs.kwargs.get("company_name") == "intel" or \
-            "intel" in (call_kwargs.args if call_kwargs.args else [])
+        company_val = (
+            call_kwargs.kwargs.get("company_name")
+            or (call_kwargs[1].get("company_name") if len(call_kwargs) > 1 else None)
+        )
+        assert company_val == "intel"
 
     @patch("SPARC.api._get_job_db")
     def test_empty_result_set(self, mock_get_db, client):
@@ -131,15 +159,30 @@ class TestAnalyzeBatchGetPagination:
         db.list_analyses.return_value = []
         mock_get_db.return_value = db
 
-        response = client.get("/analyze/batch")
+        response = client.get("/analyze/batch", headers=_auth_header())
         assert response.status_code == 200
         data = response.json()
         assert data["items"] == []
         assert data["next_cursor"] is None
 
+    @patch("SPARC.api._get_job_db")
+    def test_subsequent_page_uses_cursor(self, mock_get_db, client):
+        """Passing a cursor should retrieve the next page of results."""
+        db = Mock()
+        db.list_analyses.return_value = [_make_analysis_row(99, minutes_ago=100)]
+        mock_get_db.return_value = db
 
-class TestJobsPaginationDefaults:
-    """Test that /jobs endpoint uses updated defaults."""
+        cursor = "2025-06-01T12:00:00|50"
+        response = client.get(f"/analyze/batch?limit=10&cursor={cursor}", headers=_auth_header())
+        assert response.status_code == 200
+        data = response.json()
+        # Only one item returned → last page → no next cursor
+        assert len(data["items"]) == 1
+        assert data["next_cursor"] is None
+
+
+class TestJobsPagination:
+    """Test cursor-based pagination on GET /jobs."""
 
     @patch("SPARC.api._get_job_db")
     def test_default_limit_is_50(self, mock_get_db, client):
@@ -148,14 +191,19 @@ class TestJobsPaginationDefaults:
         db.list_jobs.return_value = []
         mock_get_db.return_value = db
 
-        client.get("/jobs")
+        client.get("/jobs", headers=_auth_header())
         call_kwargs = db.list_jobs.call_args
         # Endpoint requests limit+1 from DB, so 51
         assert 51 in call_kwargs.args or call_kwargs.kwargs.get("limit") == 51
 
     def test_limit_over_200_rejected(self, client):
         """Limit > 200 should be rejected with 422."""
-        response = client.get("/jobs?limit=201")
+        response = client.get("/jobs?limit=201", headers=_auth_header())
+        assert response.status_code == 422
+
+    def test_limit_zero_rejected(self, client):
+        """Limit < 1 should be rejected with 422."""
+        response = client.get("/jobs?limit=0", headers=_auth_header())
         assert response.status_code == 422
 
     @patch("SPARC.api._get_job_db")
@@ -165,5 +213,109 @@ class TestJobsPaginationDefaults:
         db.list_jobs.return_value = []
         mock_get_db.return_value = db
 
-        response = client.get("/jobs?limit=200")
+        response = client.get("/jobs?limit=200", headers=_auth_header())
         assert response.status_code == 200
+
+    @patch("SPARC.api._get_job_db")
+    def test_first_page_returns_items_and_cursor(self, mock_get_db, client):
+        """First page with more results than limit should return next_cursor."""
+        db = Mock()
+        # Return limit+1 rows to simulate more data available
+        rows = [_make_job_row(f"job-{i}", minutes_ago=i) for i in range(4)]
+        db.list_jobs.return_value = rows
+        mock_get_db.return_value = db
+
+        response = client.get("/jobs?limit=3", headers=_auth_header())
+        assert response.status_code == 200
+        data = response.json()
+        assert len(data["items"]) == 3
+        assert data["next_cursor"] is not None
+
+    @patch("SPARC.api._get_job_db")
+    def test_last_page_returns_no_cursor(self, mock_get_db, client):
+        """When fewer results than limit, next_cursor should be null (last page)."""
+        db = Mock()
+        rows = [
+            _make_job_row("job-a", minutes_ago=5),
+            _make_job_row("job-b", minutes_ago=10),
+        ]
+        db.list_jobs.return_value = rows
+        mock_get_db.return_value = db
+
+        response = client.get("/jobs?limit=10", headers=_auth_header())
+        assert response.status_code == 200
+        data = response.json()
+        assert len(data["items"]) == 2
+        assert data["next_cursor"] is None
+
+    @patch("SPARC.api._get_job_db")
+    def test_cursor_forwarded_to_db(self, mock_get_db, client):
+        """The cursor query param should be forwarded to the database layer."""
+        db = Mock()
+        db.list_jobs.return_value = []
+        mock_get_db.return_value = db
+
+        client.get("/jobs?cursor=2025-01-01T00:00:00|job-99", headers=_auth_header())
+        db.list_jobs.assert_called_once()
+        call_kwargs = db.list_jobs.call_args
+        cursor_val = (
+            call_kwargs.kwargs.get("cursor")
+            or (call_kwargs[1].get("cursor") if len(call_kwargs) > 1 else None)
+        )
+        assert cursor_val == "2025-01-01T00:00:00|job-99"
+
+    @patch("SPARC.api._get_job_db")
+    def test_empty_result_set(self, mock_get_db, client):
+        """Empty result set returns empty items list and null next_cursor."""
+        db = Mock()
+        db.list_jobs.return_value = []
+        mock_get_db.return_value = db
+
+        response = client.get("/jobs", headers=_auth_header())
+        assert response.status_code == 200
+        data = response.json()
+        assert data["items"] == []
+        assert data["next_cursor"] is None
+
+    @patch("SPARC.api._get_job_db")
+    def test_status_filter_forwarded(self, mock_get_db, client):
+        """The status filter should be forwarded to the database layer."""
+        db = Mock()
+        db.list_jobs.return_value = []
+        mock_get_db.return_value = db
+
+        client.get("/jobs?status=completed", headers=_auth_header())
+        db.list_jobs.assert_called_once()
+        call_kwargs = db.list_jobs.call_args
+        status_val = (
+            call_kwargs.kwargs.get("status")
+            or (call_kwargs[1].get("status") if len(call_kwargs) > 1 else None)
+        )
+        assert status_val == "completed"
+
+    @patch("SPARC.api._get_job_db")
+    def test_response_has_paginated_shape(self, mock_get_db, client):
+        """Response must have 'items' and 'next_cursor' fields (paginated shape)."""
+        db = Mock()
+        db.list_jobs.return_value = [_make_job_row("job-x")]
+        mock_get_db.return_value = db
+
+        response = client.get("/jobs?limit=10", headers=_auth_header())
+        assert response.status_code == 200
+        data = response.json()
+        assert "items" in data
+        assert "next_cursor" in data
+
+    @patch("SPARC.api._get_job_db")
+    def test_subsequent_page_uses_cursor(self, mock_get_db, client):
+        """Passing cursor returns the next page; last page has null next_cursor."""
+        db = Mock()
+        db.list_jobs.return_value = [_make_job_row("job-last", minutes_ago=200)]
+        mock_get_db.return_value = db
+
+        cursor = "2025-06-01T12:00:00|job-50"
+        response = client.get(f"/jobs?limit=10&cursor={cursor}", headers=_auth_header())
+        assert response.status_code == 200
+        data = response.json()
+        assert len(data["items"]) == 1
+        assert data["next_cursor"] is None

tests/test_rate_limit_admin.py

@@ -0,0 +1,109 @@
+"""Tests for the /admin/rate-limits endpoint."""
+
+from unittest.mock import patch
+
+import pytest
+from fastapi.testclient import TestClient
+
+from SPARC import api
+from SPARC.api import app
+from SPARC.auth import UserResponse
+
+
+@pytest.fixture
+def client():
+    """Create test client."""
+    return TestClient(app)
+
+
+@pytest.fixture(autouse=True)
+def reset_stats():
+    """Reset rate limit stats between tests."""
+    api._rate_limit_stats.clear()
+    yield
+    api._rate_limit_stats.clear()
+
+
+def _mock_admin():
+    """Return a mock admin user."""
+    return UserResponse(id=1, email="admin@test.com", role="admin", created_at="2025-01-01T00:00:00")
+
+
+def _mock_user():
+    """Return a mock non-admin user."""
+    return UserResponse(id=2, email="user@test.com", role="user", created_at="2025-01-01T00:00:00")
+
+
+class TestRateLimitAdminEndpoint:
+    """Test GET /admin/rate-limits."""
+
+    def test_admin_can_access(self, client):
+        """Admin users should be able to access the rate-limits endpoint."""
+        app.dependency_overrides[api.get_current_admin] = _mock_admin
+        try:
+            response = client.get("/admin/rate-limits")
+            assert response.status_code == 200
+            data = response.json()
+            assert "rate_limits" in data
+            assert isinstance(data["rate_limits"], list)
+        finally:
+            app.dependency_overrides.clear()
+
+    def test_non_admin_rejected(self, client):
+        """Non-admin users should get 403."""
+        # Without overriding the dependency, it should fail auth
+        response = client.get("/admin/rate-limits")
+        assert response.status_code in (401, 403)
+
+    def test_returns_configured_endpoints(self, client):
+        """Should list all rate-limited endpoints."""
+        app.dependency_overrides[api.get_current_admin] = _mock_admin
+        try:
+            response = client.get("/admin/rate-limits")
+            assert response.status_code == 200
+            data = response.json()
+            endpoints = [rl["endpoint"] for rl in data["rate_limits"]]
+            assert "/auth/register" in endpoints
+            assert "/auth/login" in endpoints
+        finally:
+            app.dependency_overrides.clear()
+
+    def test_empty_state_shows_zero_counts(self, client):
+        """When no requests have been made, counts should be zero."""
+        app.dependency_overrides[api.get_current_admin] = _mock_admin
+        try:
+            response = client.get("/admin/rate-limits")
+            data = response.json()
+            for rl in data["rate_limits"]:
+                assert rl["total_requests"] == 0
+                assert rl["rejected_requests"] == 0
+        finally:
+            app.dependency_overrides.clear()
+
+    def test_tracks_requests(self, client):
+        """After making requests, the stats should reflect them."""
+        api._track_rate_limit_request("/auth/login", "127.0.0.1")
+        api._track_rate_limit_request("/auth/login", "127.0.0.1")
+        api._track_rate_limit_request("/auth/login", "192.168.1.1", rejected=True)
+
+        app.dependency_overrides[api.get_current_admin] = _mock_admin
+        try:
+            response = client.get("/admin/rate-limits")
+            data = response.json()
+            login_stats = next(rl for rl in data["rate_limits"] if rl["endpoint"] == "/auth/login")
+            assert login_stats["total_requests"] == 3
+            assert login_stats["rejected_requests"] == 1
+        finally:
+            app.dependency_overrides.clear()
+
+    def test_includes_limit_config(self, client):
+        """Each endpoint entry should include the rate limit config string."""
+        app.dependency_overrides[api.get_current_admin] = _mock_admin
+        try:
+            response = client.get("/admin/rate-limits")
+            data = response.json()
+            for rl in data["rate_limits"]:
+                assert "limit" in rl
+                assert isinstance(rl["limit"], str)
+        finally:
+            app.dependency_overrides.clear()