diff --git a/src/agents/command_router/http_api/CommandRouterHttpAPI.cc b/src/agents/command_router/http_api/CommandRouterHttpAPI.cc
index f2b7c77d..95e8d354 100644
--- a/src/agents/command_router/http_api/CommandRouterHttpAPI.cc
+++ b/src/agents/command_router/http_api/CommandRouterHttpAPI.cc
@@ -7,6 +7,7 @@
 #include "BusCommandRouterProcessor.h"
 #include "BusCommandRouterProxy.h"
 #include "BusCommandRouterProxyStreamPoller.h"
+#include "SystemParametersSingleton.h"
 
 #define LOG_LEVEL INFO_LEVEL
 #include "Logger.h"
@@ -150,6 +151,48 @@ void CommandRouterHttpAPI::setup_routes() {
                 return;
             }
 
+            if (body.contains("parameters")) {
+                if (!body["parameters"].is_object()) {
+                    this->set_json_response(
+                        response, 400, {{"error", "Invalid parameters: expected object"}});
+                    return;
+                }
+
+                LOG_INFO("CommandRouter HTTP API setting parameters for command=" << command_text);
+
+                Properties known_params =
+                    SystemParametersSingleton::get_instance()->get_command_router_params();
+                vector<pair<string, string>> set_args;
+                for (const auto& [key, value] : body["parameters"].items()) {
+                    string validation_error;
+                    const optional<string> args =
+                        this->build_set_param_arg(known_params, key, value, validation_error);
+                    if (!args.has_value()) {
+                        this->set_json_response(response, 400, {{"error", validation_error}});
+                        return;
+                    }
+                    set_args.emplace_back(key, args.value());
+                }
+                for (const auto& [key, args] : set_args) {
+                    string router_error;
+                    const PollStreamResult poll_result = this->execute_router_command(
+                        "set",
+                        args,
+                        nullptr,
+                        nullptr,
+                        [&](const string& message) { router_error = message; },
+                        nullptr);
+                    if (!poll_result.ok) {
+                        LOG_ERROR("CommandRouter HTTP API setting parameter failed for command="
+                                  << command_text << " key=" << key << " args=" << args
+                                  << " error=" << router_error);
+                        this->set_json_response(response, 500, {{"error", router_error}});
+                        return;
+                    }
+                }
+                LOG_INFO("CommandRouter HTTP API parameters set for command=" << command_text);
+            }
+
             if (this->is_sync_command_type(command_type)) {
                 LOG_INFO("CommandRouter HTTP API sync execution type=" << command_type);
 
@@ -495,3 +538,134 @@ void CommandRouterHttpAPI::set_json_response(httplib::Response& response, int st
     string content = body.dump();
     response.set_content(content, "application/json");
 }
+
+optional<string> CommandRouterHttpAPI::build_set_param_arg(Properties& known_params,
+                                                           const string& key,
+                                                           const json& value,
+                                                           string& error_message) const {
+    auto param_it = known_params.find(key);
+    if (param_it == known_params.end()) {
+        error_message = "Unknown parameter: '" + key + "'";
+        return nullopt;
+    }
+
+    const auto fail = [&](string message) -> optional<string> {
+        error_message = std::move(message);
+        return nullopt;
+    };
+
+    optional<string> formatted_value;
+
+    if (holds_alternative<bool>(param_it->second)) {
+        if (value.is_boolean()) {
+            formatted_value = value.get<bool>() ? "true" : "false";
+        } else if (value.is_string()) {
+            const string& text = value.get<string>();
+            if (text == "true" || text == "false") {
+                formatted_value = text;
+            } else if (text == "1") {
+                formatted_value = "true";
+            } else if (text == "0") {
+                formatted_value = "false";
+            } else {
+                return fail("Parameter '" + key + "' expects bool (true, false, 1, or 0)");
+            }
+        } else if (value.is_number_integer()) {
+            const long long number = value.get<long long>();
+            if (number == 0) {
+                formatted_value = "false";
+            } else if (number == 1) {
+                formatted_value = "true";
+            } else {
+                return fail("Parameter '" + key + "' expects bool (true, false, 1, or 0)");
+            }
+        } else {
+            return fail("Parameter '" + key + "' expects bool (true, false, 1, or 0)");
+        }
+    } else if (holds_alternative<unsigned int>(param_it->second)) {
+        const string uint_error = "Parameter '" + key + "' expects unsigned integer";
+        const auto fits_uint = [](unsigned long long number) {
+            return static_cast<unsigned int>(number) == number;
+        };
+        if (value.is_number_unsigned()) {
+            const unsigned long long number = value.get<unsigned long long>();
+            if (!fits_uint(number)) {
+                return fail(uint_error);
+            }
+            formatted_value = std::to_string(number);
+        } else if (value.is_number_integer()) {
+            const long long number = value.get<long long>();
+            if (number < 0 || !fits_uint(static_cast<unsigned long long>(number))) {
+                return fail(uint_error);
+            }
+            formatted_value = std::to_string(number);
+        } else if (value.is_string()) {
+            const string& text = value.get<string>();
+            const bool all_digits =
+                !text.empty() &&
+                all_of(text.begin(), text.end(), [](unsigned char c) { return isdigit(c); });
+            if (!all_digits) {
+                return fail(uint_error);
+            }
+            try {
+                size_t consumed = 0;
+                const unsigned long long parsed = stoull(text, &consumed);
+                if (consumed != text.size() || !fits_uint(parsed)) {
+                    return fail(uint_error);
+                }
+                formatted_value = text;
+            } catch (const exception&) {
+                return fail(uint_error);
+            }
+        } else {
+            return fail(uint_error);
+        }
+    } else if (holds_alternative<long>(param_it->second)) {
+        if (value.is_number_integer()) {
+            formatted_value = std::to_string(value.get<long long>());
+        } else if (value.is_string()) {
+            try {
+                size_t consumed = 0;
+                const long parsed = stol(value.get<string>(), &consumed);
+                if (consumed != value.get<string>().size()) {
+                    return fail("Parameter '" + key + "' expects integer");
+                }
+                formatted_value = std::to_string(parsed);
+            } catch (const exception&) {
+                return fail("Parameter '" + key + "' expects integer");
+            }
+        } else {
+            return fail("Parameter '" + key + "' expects integer");
+        }
+    } else if (holds_alternative<double>(param_it->second)) {
+        if (value.is_number()) {
+            formatted_value = value.dump();
+        } else if (value.is_string()) {
+            try {
+                size_t consumed = 0;
+                stod(value.get<string>(), &consumed);
+                if (consumed != value.get<string>().size()) {
+                    return fail("Parameter '" + key + "' expects number");
+                }
+                formatted_value = value.get<string>();
+            } catch (const exception&) {
+                return fail("Parameter '" + key + "' expects number");
+            }
+        } else {
+            return fail("Parameter '" + key + "' expects number");
+        }
+    } else if (holds_alternative<string>(param_it->second)) {
+        if (!value.is_string()) {
+            return fail("Parameter '" + key + "' expects string");
+        }
+        const string& text = value.get<string>();
+        if (text.empty()) {
+            return fail("Parameter '" + key + "' expects non-empty string");
+        }
+        formatted_value = text;
+    } else {
+        return fail("Parameter '" + key + "' has unsupported type");
+    }
+
+    return "param " + key + " " + formatted_value.value();
+}
diff --git a/src/agents/command_router/http_api/CommandRouterHttpAPI.h b/src/agents/command_router/http_api/CommandRouterHttpAPI.h
index f7ff3ec2..915115c4 100644
--- a/src/agents/command_router/http_api/CommandRouterHttpAPI.h
+++ b/src/agents/command_router/http_api/CommandRouterHttpAPI.h
@@ -5,6 +5,7 @@
 #include <functional>
 #include <memory>
 #include <mutex>
+#include <optional>
 #include <string>
 #include <unordered_map>
 #include <unordered_set>
@@ -133,6 +134,15 @@ class CommandRouterHttpAPI : public processor::Processor, public processor::Thre
 
     /** @brief Set response status and JSON body. */
     void set_json_response(httplib::Response& res, int status_code, const json& payload);
+
+    /**
+     * @brief Validate a router parameter value and build `param <key> <value>`.
+     * @return The set-command arg on success; nullopt with error_message on failure.
+     */
+    optional<string> build_set_param_arg(Properties& known_params,
+                                         const string& key,
+                                         const json& value,
+                                         string& error_message) const;
 };
 
 }  // namespace command_router
diff --git a/src/tests/cpp/command_router_http_api_test.cc b/src/tests/cpp/command_router_http_api_test.cc
index b7567618..c5c1e95b 100644
--- a/src/tests/cpp/command_router_http_api_test.cc
+++ b/src/tests/cpp/command_router_http_api_test.cc
@@ -44,6 +44,12 @@ json make_execution_body(const string& command_type = "query",
     return {{"command_type", command_type}, {"command_text", command_text}};
 }
 
+json make_execution_body_with_parameters(const json& parameters,
+                                         const string& command_type = "query",
+                                         const string& command_text = "(Similarity \"human\" %V)") {
+    return {{"command_type", command_type}, {"command_text", command_text}, {"parameters", parameters}};
+}
+
 class HangingQueryForwardProxy : public BusCommandProxy {
    public:
     void pack_command_line_args() override {}
@@ -115,7 +121,7 @@ class HttpAPIServerFixture {
     httplib::Client make_client(int port) const {
         httplib::Client client(TEST_HOST, port);
         client.set_connection_timeout(2);
-        client.set_read_timeout(5);
+        client.set_read_timeout(15);
         return client;
     }
 
@@ -631,6 +637,69 @@ TEST_F(CommandRouterHttpAPITest, set_param_rejects_unknown_key) {
     EXPECT_NE(payload["error"].get<string>().find("Unknown parameter"), string::npos);
 }
 
+TEST_F(CommandRouterHttpAPITest, execution_parameters_accepts_valid_scalar_values) {
+    auto create =
+        client().Post("/command-router/executions",
+                      make_execution_body_with_parameters({{"populate_metta_mapping", true},
+                                                           {"use_metta_as_query_tokens", "true"},
+                                                           {"max_answers", 1},
+                                                           {"count_flag", 1}})
+                          .dump(),
+                      "application/json");
+    ASSERT_TRUE(create);
+    EXPECT_EQ(create->status, 202);
+
+    auto get_res = client().Post(
+        "/command-router/executions", make_execution_body("get", "params").dump(), "application/json");
+    ASSERT_TRUE(get_res);
+    ASSERT_EQ(get_res->status, 200);
+
+    const string params = json::parse(get_res->body)["result"].get<string>();
+    EXPECT_NE(params.find("populate_metta_mapping: true"), string::npos);
+    EXPECT_NE(params.find("use_metta_as_query_tokens: true"), string::npos);
+    EXPECT_NE(params.find("max_answers: 1"), string::npos);
+    EXPECT_NE(params.find("count_flag: true"), string::npos);
+}
+
+TEST_F(CommandRouterHttpAPITest, execution_parameters_rejects_invalid_values) {
+    auto unknown_key = client().Post("/command-router/executions",
+                                     make_execution_body_with_parameters({{"unknown_key", true}}).dump(),
+                                     "application/json");
+    ASSERT_TRUE(unknown_key);
+    EXPECT_EQ(unknown_key->status, 400);
+    EXPECT_NE(json::parse(unknown_key->body)["error"].get<string>().find("Unknown parameter"),
+              string::npos);
+
+    auto wrong_type =
+        client().Post("/command-router/executions",
+                      make_execution_body_with_parameters({{"max_answers", "not_a_number"}}).dump(),
+                      "application/json");
+    ASSERT_TRUE(wrong_type);
+    EXPECT_EQ(wrong_type->status, 400);
+    EXPECT_NE(json::parse(wrong_type->body)["error"].get<string>().find("unsigned integer"),
+              string::npos);
+
+    auto out_of_range =
+        client().Post("/command-router/executions",
+                      make_execution_body_with_parameters({{"max_answers", 4294967296}}).dump(),
+                      "application/json");
+    ASSERT_TRUE(out_of_range);
+    EXPECT_EQ(out_of_range->status, 400);
+    EXPECT_NE(json::parse(out_of_range->body)["error"].get<string>().find("unsigned integer"),
+              string::npos);
+
+    auto not_object = client().Post("/command-router/executions",
+                                    json({{"command_type", "query"},
+                                          {"command_text", "(Similarity \"human\" %V)"},
+                                          {"parameters", json::array({1, 2, 3})}})
+                                        .dump(),
+                                    "application/json");
+    ASSERT_TRUE(not_object);
+    EXPECT_EQ(not_object->status, 400);
+    EXPECT_NE(json::parse(not_object->body)["error"].get<string>().find("expected object"),
+              string::npos);
+}
+
 TEST_F(CommandRouterHttpAPITest, create_execution_rejects_invalid_requests) {
     auto bad_json = client().Post("/command-router/executions", "{bad", "application/json");
     ASSERT_TRUE(bad_json);