Unit 9 · Connect to external tools and data

Handle long-running MCP work

You can monitor progress, provide requested input, cancel, or resume work that finishes later. Recording and deterministic replay make the protocol lifecycle testable.

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Worked example

See the idea in context

auto result=client->call_tool("start_reindex",axllm::object({{"scope","all"}}));
source->start_scoped([&](axllm::AxEventEnvelope inbound,std::string scope,std::string trust){runtime.publish(inbound,scope,trust);});

Run itIn your own project

include(FetchContent)
FetchContent_Declare(axllm GIT_REPOSITORY https://github.com/ax-llm/ax GIT_TAG main SOURCE_SUBDIR packages/cpp)
FetchContent_MakeAvailable(axllm)
target_link_libraries(your_app PRIVATE axllm::axllm)

#include <axllm/axllm.hpp>

auto llm = axllm::ai("openai", axllm::object({{"apiKey", std::getenv("OPENAI_API_KEY")}}));
auto classify = axllm::ax("review:string -> sentiment:class \"positive, negative, neutral\"");

Set OPENAI_APIKEY in your environment before running provider-backed code.

In the ax repo

From a clone of the ax repo:

npm run example -- cpp src/examples/cpp/mcp/native_mcp_tools.cpp

Active practice

Show that you can use it

Answer 2 in a row to learn this · attempt 1

Keep exploring

See the idea in context

Show that you can use it

Source-backed follow-up