diff --git a/OpenCand.API/Controllers/EstatisticaController.cs b/OpenCand.API/Controllers/EstatisticaController.cs
new file mode 100644
index 0000000..d0a27f9
--- /dev/null
+++ b/OpenCand.API/Controllers/EstatisticaController.cs
@@ -0,0 +1,37 @@
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.RateLimiting;
+using OpenCand.API.Config;
+using OpenCand.API.Model;
+using OpenCand.API.Services;
+
+namespace OpenCand.API.Controllers
+{
+    [EnableRateLimiting(RateLimitingConfig.DefaultPolicy)]
+    public class EstatisticaController : BaseController
+    {
+        private readonly EstatisticaService estatisticaService;
+
+        public EstatisticaController(EstatisticaService estatisticaService)
+        {
+            this.estatisticaService = estatisticaService;
+        }
+
+        [HttpGet("configuration")]
+        public async Task<ConfigurationModel> GetConfiguration()
+        {
+            return await estatisticaService.GetConfigurationModel();
+        }
+
+        [HttpGet("enriquecimento")]
+        public async Task<List<MaioresEnriquecimento>> GetMaioresEnriquecimentos()
+        {
+            return await estatisticaService.GetMaioresEnriquecimentos();
+        }
+
+        [HttpPost("values-sum")]
+        public async Task<List<GetValueSumResponse>> GetValuesSum([FromBody] GetValueSumRequest getValueSumRequest)
+        {
+            return await estatisticaService.GetValueSum(getValueSumRequest);
+        }
+    }
+}
diff --git a/OpenCand.API/Model/ConfigurationModel.cs b/OpenCand.API/Model/ConfigurationModel.cs
new file mode 100644
index 0000000..c3db7c6
--- /dev/null
+++ b/OpenCand.API/Model/ConfigurationModel.cs
@@ -0,0 +1,10 @@
+namespace OpenCand.API.Model
+{
+    public class ConfigurationModel
+    {
+        public List<string> Partidos { get; set; }
+        public List<string> SiglasUF { get; set; }
+        public List<int> Anos { get; set; }
+        public List<string> Cargos { get; set; }
+    }
+}
diff --git a/OpenCand.API/Model/EstatisticaModels.cs b/OpenCand.API/Model/EstatisticaModels.cs
new file mode 100644
index 0000000..f8e545a
--- /dev/null
+++ b/OpenCand.API/Model/EstatisticaModels.cs
@@ -0,0 +1,38 @@
+namespace OpenCand.API.Model
+{
+    public class MaioresEnriquecimento
+    {
+        public Guid IdCandidato { get; set; }
+        public string Nome { get; set; }
+        public float PatrimonioInicial { get; set; }
+        public int AnoInicial { get; set; }
+        public float PatrimonioFinal { get; set; }
+        public int AnoFinal { get; set; }
+        public float Enriquecimento { get; set; }
+    }
+
+    public class GetValueSumRequest
+    {
+        public string Type { get; set; } // "bem", "despesa", "receita"
+        public string GroupBy { get; set; } // "candidato", "partido", "uf", or "cargo"
+        public GetValueSumRequestFilter? Filter { get; set; }
+        public class GetValueSumRequestFilter
+        {
+            public string? Partido { get; set; } // Optional, can be null
+            public string? Uf { get; set; } // Optional, can be null
+            public int? Ano { get; set; } // Optional, can be null
+            public string? Cargo { get; set; } // Optional, can be null
+        }
+    }
+
+    public class GetValueSumResponse
+    {
+        public Guid? IdCandidato { get; set; }
+        public string? Sgpartido { get; set; }
+        public string? SiglaUf { get; set; }
+        public string? Cargo { get; set; }
+        public string? Nome { get; set; }
+        public int Ano { get; set; }
+        public decimal Valor { get; set; }
+    }
+}
diff --git a/OpenCand.API/Program.cs b/OpenCand.API/Program.cs
index 4cf1cc6..e08575d 100644
--- a/OpenCand.API/Program.cs
+++ b/OpenCand.API/Program.cs
@@ -52,22 +52,21 @@ namespace OpenCand.API
 
 
             app.Run();
-        }        private static void SetupServices(WebApplicationBuilder builder)
+        }
+        
+        private static void SetupServices(WebApplicationBuilder builder)
         {
             builder.Services.Configure<FotosSettings>(builder.Configuration.GetSection("FotosSettings"));
             builder.Services.AddMemoryCache();
             
-            // Register repositories with IMemoryCache
-            builder.Services.AddScoped<OpenCandRepository>(provider =>
-                new OpenCandRepository(provider.GetRequiredService<IConfiguration>(), provider.GetService<IMemoryCache>()));
-            builder.Services.AddScoped<CandidatoRepository>(provider =>
-                new CandidatoRepository(provider.GetRequiredService<IConfiguration>(), provider.GetService<IMemoryCache>()));
-            builder.Services.AddScoped<BemCandidatoRepository>(provider =>
-                new BemCandidatoRepository(provider.GetRequiredService<IConfiguration>(), provider.GetService<IMemoryCache>()));
-            builder.Services.AddScoped<DespesaReceitaRepository>(provider =>
-                new DespesaReceitaRepository(provider.GetRequiredService<IConfiguration>(), provider.GetService<IMemoryCache>()));
-            
+            builder.Services.AddScoped(provider => new OpenCandRepository(provider.GetRequiredService<IConfiguration>(), provider.GetService<IMemoryCache>()));
+            builder.Services.AddScoped(provider => new CandidatoRepository(provider.GetRequiredService<IConfiguration>(), provider.GetService<IMemoryCache>()));
+            builder.Services.AddScoped(provider => new BemCandidatoRepository(provider.GetRequiredService<IConfiguration>(), provider.GetService<IMemoryCache>()));
+            builder.Services.AddScoped(provider => new DespesaReceitaRepository(provider.GetRequiredService<IConfiguration>(), provider.GetService<IMemoryCache>()));
+            builder.Services.AddScoped(provider => new EstatisticaRepository(provider.GetRequiredService<IConfiguration>(), provider.GetService<IMemoryCache>()));
+
             builder.Services.AddScoped<OpenCandService>();
+            builder.Services.AddScoped<EstatisticaService>();
         }
     }
 }
diff --git a/OpenCand.API/Repository/EstatisticaRepository.cs b/OpenCand.API/Repository/EstatisticaRepository.cs
new file mode 100644
index 0000000..f8449c6
--- /dev/null
+++ b/OpenCand.API/Repository/EstatisticaRepository.cs
@@ -0,0 +1,87 @@
+using Dapper;
+using Microsoft.Extensions.Caching.Memory;
+using Npgsql;
+using OpenCand.API.Model;
+using OpenCand.Core.Models;
+using OpenCand.Repository;
+
+namespace OpenCand.API.Repository
+{
+    public class EstatisticaRepository : BaseRepository
+    {
+        private readonly IConfiguration configuration;
+
+        public EstatisticaRepository(IConfiguration configuration, IMemoryCache? cache = null) : base(configuration, cache)
+        {
+            this.configuration = configuration;
+        }
+
+        public async Task<List<MaioresEnriquecimento>> GetMaioresEnriquecimentos()
+        {
+            string cacheKey = GenerateCacheKey("GetMaioresEnriquecimento");
+
+            var result = await GetOrSetCacheAsync(cacheKey, async () =>
+            {
+                using (var connection = new NpgsqlConnection(ConnectionString))
+                {
+                    return (await connection.QueryAsync<MaioresEnriquecimento>(@"
+                        WITH patrimonio_anual AS (
+                            SELECT idcandidato, ano, SUM(valor) AS valor_total_ano
+                            FROM bem_candidato
+                            GROUP BY idcandidato, ano
+                        ),
+                        extremos_declaracao AS (
+                            SELECT idcandidato, MIN(ano) AS anoInicial, MAX(ano) AS anoFinal
+                            FROM patrimonio_anual
+                            GROUP BY idcandidato
+                            HAVING COUNT(DISTINCT ano) >= 2
+                        )
+                        SELECT
+                            c.nome,
+                            ed.anoInicial,
+                            pi.valor_total_ano AS patrimonioInicial,
+                            ed.anoFinal,
+                            pf.valor_total_ano AS patrimonioFinal,
+                            (pf.valor_total_ano - pi.valor_total_ano) AS enriquecimento
+                        FROM extremos_declaracao ed
+                        JOIN candidato c ON ed.idcandidato = c.idcandidato
+                        JOIN patrimonio_anual pi ON ed.idcandidato = pi.idcandidato AND ed.anoInicial = pi.ano
+                        JOIN patrimonio_anual pf ON ed.idcandidato = pf.idcandidato AND ed.anoFinal = pf.ano
+                        ORDER BY enriquecimento DESC
+                        LIMIT 25;")
+                    ).AsList();
+                }
+            });            return result ?? new List<MaioresEnriquecimento>();
+        }
+
+        public async Task<ConfigurationModel> GetConfiguration()
+        {
+            string cacheKey = GenerateCacheKey("GetConfigurationModel");
+
+            var result = await GetOrSetCacheAsync(cacheKey, async () =>
+            {
+                var result = new ConfigurationModel();
+
+                using (var connection = new NpgsqlConnection(ConnectionString))
+                {
+                    result.Partidos = (await connection.QueryAsync<string>(@"SELECT DISTINCT sigla FROM partido;")).AsList();
+                    result.SiglasUF = (await connection.QueryAsync<string>(@"SELECT DISTINCT siglauf FROM candidato_mapping;")).AsList();
+                    result.Anos = (await connection.QueryAsync<int>(@"SELECT DISTINCT ano FROM candidato_mapping;")).AsList();
+                    result.Cargos = (await connection.QueryAsync<string>(@"SELECT DISTINCT cargo FROM candidato_mapping;")).AsList();
+                }
+
+                return result;
+            });
+
+            return result ?? new ConfigurationModel();
+        }
+
+        public async Task<List<GetValueSumResponse>> GetValueSum(string query, Dictionary<string, object>? parameters = null)
+        {
+            using (var connection = new NpgsqlConnection(ConnectionString))
+            {
+                return (await connection.QueryAsync<GetValueSumResponse>(query, parameters)).AsList();
+            }
+        }
+    }
+}
diff --git a/OpenCand.API/Repository/OpenCandRepository.cs b/OpenCand.API/Repository/OpenCandRepository.cs
index a1c6057..6096e20 100644
--- a/OpenCand.API/Repository/OpenCandRepository.cs
+++ b/OpenCand.API/Repository/OpenCandRepository.cs
@@ -5,7 +5,8 @@ using OpenCand.Core.Models;
 using OpenCand.Repository;
 
 namespace OpenCand.API.Repository
-{    public class OpenCandRepository : BaseRepository
+{    
+    public class OpenCandRepository : BaseRepository
     {
         private readonly IConfiguration configuration;
 
@@ -35,7 +36,9 @@ namespace OpenCand.API.Repository
             });
             
             return result ?? new OpenCandStats();
-        }        public async Task<DataAvailabilityStats> GetDataAvailabilityAsync()
+        }
+        
+        public async Task<DataAvailabilityStats> GetDataAvailabilityAsync()
         {
             string cacheKey = GenerateCacheKey("DataAvailabilityStats");
 
diff --git a/OpenCand.API/Services/EstatisticaService.cs b/OpenCand.API/Services/EstatisticaService.cs
new file mode 100644
index 0000000..8a4d1df
--- /dev/null
+++ b/OpenCand.API/Services/EstatisticaService.cs
@@ -0,0 +1,178 @@
+using OpenCand.API.Model;
+using OpenCand.API.Repository;
+using OpenCand.Repository;
+
+namespace OpenCand.API.Services
+{
+    public class EstatisticaService
+    {
+        private readonly OpenCandRepository openCandRepository;
+        private readonly CandidatoRepository candidatoRepository;
+        private readonly BemCandidatoRepository bemCandidatoRepository;
+        private readonly DespesaReceitaRepository despesaReceitaRepository;
+        private readonly EstatisticaRepository estatisticaRepository;
+        private readonly IConfiguration configuration;
+        private readonly ILogger<OpenCandService> logger;
+
+        public EstatisticaService(
+            OpenCandRepository openCandRepository,
+            CandidatoRepository candidatoRepository,
+            BemCandidatoRepository bemCandidatoRepository,
+            DespesaReceitaRepository despesaReceitaRepository,
+            EstatisticaRepository estatisticaRepository,
+            IConfiguration configuration,
+            ILogger<OpenCandService> logger)
+        {
+            this.openCandRepository = openCandRepository;
+            this.candidatoRepository = candidatoRepository;
+            this.bemCandidatoRepository = bemCandidatoRepository;
+            this.despesaReceitaRepository = despesaReceitaRepository;
+            this.estatisticaRepository = estatisticaRepository;
+            this.configuration = configuration;
+            this.logger = logger;
+        }
+
+        public async Task<ConfigurationModel> GetConfigurationModel()
+        {
+            return await estatisticaRepository.GetConfiguration();
+        }
+
+        public async Task<List<MaioresEnriquecimento>> GetMaioresEnriquecimentos()
+        {
+            return await estatisticaRepository.GetMaioresEnriquecimentos();
+        }
+
+        public async Task<List<GetValueSumResponse>> GetValueSum(GetValueSumRequest request)
+        {
+            ValidateRequest(request);
+
+            var sqlBuilder = new SqlQueryBuilder();
+            var query = sqlBuilder.BuildQuery(request);
+            var parameters = sqlBuilder.GetParameters();
+
+            return await estatisticaRepository.GetValueSum(query, parameters);
+        }
+
+        private void ValidateRequest(GetValueSumRequest request)
+        {
+            if (string.IsNullOrWhiteSpace(request.Type))
+                throw new ArgumentException("Type is required.");
+
+            if (string.IsNullOrWhiteSpace(request.GroupBy))
+                throw new ArgumentException("GroupBy is required.");
+
+            var validTypes = new[] { "bem", "despesa", "receita" };
+            if (!validTypes.Contains(request.Type.ToLower()))
+                throw new ArgumentException($"Invalid type specified. Valid values are: {string.Join(", ", validTypes)}");
+
+            var validGroupBy = new[] { "candidato", "partido", "uf", "cargo" };
+            if (!validGroupBy.Contains(request.GroupBy.ToLower()))
+                throw new ArgumentException($"Invalid groupBy specified. Valid values are: {string.Join(", ", validGroupBy)}");
+        }
+
+        private class SqlQueryBuilder
+        {
+            private readonly Dictionary<string, object> _parameters = new();
+            private int _paramCounter = 0;
+
+            public Dictionary<string, object> GetParameters() => _parameters;
+
+            public string BuildQuery(GetValueSumRequest request)
+            {
+                var selectClause = BuildSelectClause(request.GroupBy);
+                var fromClause = BuildFromClause(request.Type);
+                var joinClause = BuildJoinClause(request.GroupBy);
+                var whereClause = BuildWhereClause(request.Filter);
+                var groupByClause = BuildGroupByClause(request.GroupBy);
+                var orderByClause = "ORDER BY SUM(src.valor) DESC";
+                var limitClause = "LIMIT 10";
+
+                return $"{selectClause} {fromClause} {joinClause} {whereClause} {groupByClause} {orderByClause} {limitClause}";
+            }
+
+            private string BuildSelectClause(string groupBy)
+            {
+                return groupBy.ToLower() switch
+                {
+                    "candidato" => "SELECT src.idcandidato, c.nome, src.ano, SUM(src.valor) as valor",
+                    "partido" => "SELECT cm.sgpartido, src.ano, SUM(src.valor) as valor",
+                    "uf" => "SELECT cm.siglauf, src.ano, SUM(src.valor) as valor",
+                    "cargo" => "SELECT cm.cargo, src.ano, SUM(src.valor) as valor",
+                    _ => throw new ArgumentException("Invalid group by specified.")
+                };
+            }
+
+            private string BuildFromClause(string type)
+            {
+                return type.ToLower() switch
+                {
+                    "bem" => "FROM bem_candidato src",
+                    "despesa" => "FROM despesas_candidato src",
+                    "receita" => "FROM receitas_candidato src",
+                    _ => throw new ArgumentException("Invalid type specified.")
+                };
+            }
+
+            private string BuildJoinClause(string groupBy)
+            {
+                return groupBy.ToLower() switch
+                {
+                    "candidato" => "JOIN candidato c ON src.idcandidato = c.idcandidato JOIN candidato_mapping cm ON src.idcandidato = cm.idcandidato AND src.ano = cm.ano",
+                    "partido" or "uf" or "cargo" => "JOIN candidato_mapping cm ON src.idcandidato = cm.idcandidato AND src.ano = cm.ano",
+                    _ => throw new ArgumentException("Invalid group by specified.")
+                };
+            }
+
+            private string BuildWhereClause(GetValueSumRequest.GetValueSumRequestFilter? filter)
+            {
+                if (filter == null)
+                    return "";
+
+                var conditions = new List<string>();
+
+                if (!string.IsNullOrWhiteSpace(filter.Partido))
+                {
+                    var paramName = $"partido{++_paramCounter}";
+                    conditions.Add($"cm.sgpartido = @{paramName}");
+                    _parameters[paramName] = filter.Partido;
+                }
+
+                if (!string.IsNullOrWhiteSpace(filter.Uf))
+                {
+                    var paramName = $"uf{++_paramCounter}";
+                    conditions.Add($"cm.siglauf = @{paramName}");
+                    _parameters[paramName] = filter.Uf;
+                }
+
+                if (filter.Ano.HasValue)
+                {
+                    var paramName = $"ano{++_paramCounter}";
+                    conditions.Add($"src.ano = @{paramName}");
+                    _parameters[paramName] = filter.Ano.Value;
+                }
+
+                if (!string.IsNullOrWhiteSpace(filter.Cargo))
+                {
+                    var paramName = $"cargo{++_paramCounter}";
+                    conditions.Add($"cm.cargo = @{paramName}");
+                    _parameters[paramName] = filter.Cargo;
+                }
+
+                return conditions.Count > 0 ? $"WHERE {string.Join(" AND ", conditions)}" : "";
+            }
+
+            private string BuildGroupByClause(string groupBy)
+            {
+                return groupBy.ToLower() switch
+                {
+                    "candidato" => "GROUP BY src.idcandidato, c.nome, src.ano",
+                    "partido" => "GROUP BY cm.sgpartido, src.ano",
+                    "uf" => "GROUP BY cm.siglauf, src.ano",
+                    "cargo" => "GROUP BY cm.cargo, src.ano",
+                    _ => throw new ArgumentException("Invalid group by specified.")
+                };
+            }
+        }
+
+    }
+}
diff --git a/db/db.sql b/db/db.sql
index 2f8fa94..32ac77b 100644
--- a/db/db.sql
+++ b/db/db.sql
@@ -98,7 +98,7 @@ CREATE INDEX idx_partido_numero ON partido (numero);
 
 ---- Tables for storing despesas e receitas of candidacies
 CREATE TABLE despesas_candidato (
-    idreceita UUID NOT NULL DEFAULT gen_random_uuid(),
+    iddespesa UUID NOT NULL DEFAULT gen_random_uuid(),
     idcandidato UUID NOT NULL,
     ano INT NOT NULL,
     turno VARCHAR(2) NOT NULL,
@@ -115,7 +115,7 @@ CREATE TABLE despesas_candidato (
     descricao TEXT,
     origemdespesa TEXT,
     valor NUMERIC(20, 2),
-    CONSTRAINT pk_despesas_candidato PRIMARY KEY (idreceita),
+    CONSTRAINT pk_despesas_candidato PRIMARY KEY (iddespesa),
     CONSTRAINT fk_despesas_candidato_candidato FOREIGN KEY (idcandidato) REFERENCES candidato(idcandidato) ON DELETE CASCADE ON UPDATE CASCADE
 );
 CREATE INDEX idx_despesas_candidato_idcandidato ON despesas_candidato (idcandidato);