Add asio-grpc to the dependencies inside your vcpkg.json:

{
    "name": "your_app",
    "version": "0.1.0",
    "dependencies": [
        "asio-grpc",
        // To use the Boost.Asio backend add
        // "boost-asio",
        // To use the standalone Asio backend add
        // "asio",
        // To use the libunifex backend add
        // "libunifex",
        // To use the stdexec backend add
        // "stdexec"
    ]
}

Find asio-grpc and link it to your target.

Using Boost.Asio:

find_package(asio-grpc CONFIG REQUIRED)
find_package(Boost REQUIRED)
target_link_libraries(your_app PUBLIC asio-grpc::asio-grpc Boost::headers)

Or using standalone Asio:

find_package(asio-grpc CONFIG REQUIRED)
find_package(asio CONFIG REQUIRED)
target_link_libraries(your_app PUBLIC asio-grpc::asio-grpc-standalone-asio asio::asio)

Or using libunifex:

find_package(asio-grpc CONFIG REQUIRED)
find_package(unifex CONFIG REQUIRED)
target_link_libraries(your_app PUBLIC asio-grpc::asio-grpc-unifex unifex::unifex)

Or using stdexec:

find_package(asio-grpc CONFIG REQUIRED)
find_package(stdexec CONFIG REQUIRED)
target_link_libraries(your_app PUBLIC asio-grpc::asio-grpc-stdexec STDEXEC::stdexec)

See asio-grpc's documentation on the Hunter website: https://hunter.readthedocs.io/en/latest/packages/pkg/asio-grpc.html.

The recipe in conan-center is called asio-grpc.
If you are using conan's CMake generator then link with asio-grpc::asio-grpc independent of the backend that you choose:

find_package(asio-grpc)
target_link_libraries(your_app PUBLIC asio-grpc::asio-grpc)

Clone the repository and install it.

cmake -B build -DCMAKE_INSTALL_PREFIX=/desired/installation/directory .
cmake --build build --target install

Locate it and link it to your target.

Using Boost.Asio:

# Make sure CMAKE_PREFIX_PATH contains /desired/installation/directory
find_package(asio-grpc CONFIG REQUIRED)
find_package(Boost)
target_link_libraries(your_app PUBLIC asio-grpc::asio-grpc Boost::headers)

Or using standalone Asio:

# Make sure CMAKE_PREFIX_PATH contains /desired/installation/directory
find_package(asio-grpc CONFIG REQUIRED)
find_package(asio)
target_link_libraries(your_app PUBLIC asio-grpc::asio-grpc-standalone-asio asio::asio)

Or using libunifex:

# Make sure CMAKE_PREFIX_PATH contains /desired/installation/directory
find_package(asio-grpc CONFIG REQUIRED)
find_package(unifex)
target_link_libraries(your_app PUBLIC asio-grpc::asio-grpc-unifex unifex::unifex)

Or using stdexec:

# Make sure CMAKE_PREFIX_PATH contains /desired/installation/directory
find_package(asio-grpc CONFIG REQUIRED)
find_package(stdexec)
target_link_libraries(your_app PUBLIC asio-grpc::asio-grpc-stdexec STDEXEC::stdexec)

Clone the repository into a subdirectory of your CMake project. Then add it and link it to your target.

Independent of the backend you chose, find and link with gRPC:

find_package(gRPC)
target_link_libraries(your_app PUBLIC gRPC::grpc++)

Using Boost.Asio:

add_subdirectory(/path/to/asio-grpc)
find_package(Boost)
target_link_libraries(your_app PUBLIC asio-grpc::asio-grpc Boost::headers)

Or using standalone Asio:

add_subdirectory(/path/to/asio-grpc)
find_package(asio)
target_link_libraries(your_app PUBLIC asio-grpc::asio-grpc-standalone-asio asio::asio)

Or using libunifex:

add_subdirectory(/path/to/asio-grpc)
find_package(unifex)
target_link_libraries(your_app PUBLIC asio-grpc::asio-grpc-unifex unifex::unifex)

Or using stdexec:

add_subdirectory(/path/to/asio-grpc)
find_package(stdexec)
target_link_libraries(your_app PUBLIC asio-grpc::asio-grpc-stdexec STDEXEC::stdexec)

This type of usage is unsupported. Future versions of asio-grpc might break it without notice.

Copy the contents of the src/ directory into your project and add it to your project's include directories. Depending on your desired backend: Boost.Asio, standalone Asio, libunifex or stdexec, set the preprocessor definitions AGRPC_BOOST_ASIO, AGRPC_STANDALONE_ASIO, AGRPC_UNIFEX or AGRPC_STDEXEC respectively. Also make sure that the backend's header files and libraries can be found correctly.

Below are the results from the helloworld unary RPC for:
Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz
Linux, GCC 12.2.0, Boost 1.80.0, gRPC 1.52.1, asio-grpc v2.5.0, jemalloc 5.2.1
Request scenario: string_100B

1 CPU server

2 CPU server