diff --git a/.github/workflows/lc_proxy.yml b/.github/workflows/lc_proxy.yml
new file mode 100644
index 000000000..d087479e5
--- /dev/null
+++ b/.github/workflows/lc_proxy.yml
@@ -0,0 +1,208 @@
+name: Light client proxy CI
+on:
+  push:
+    paths:
+      - '.github/workflows/lc_proxy.yml'
+      - 'lc_proxy/**'
+      - '!lc_proxy/**.md'
+      - 'vendor/**'
+      - 'Makefile'
+      - 'nimbus.nimble'
+
+  pull_request:
+    paths:
+      - '.github/workflows/lc_proxy.yml'
+      - 'lc_proxy/**'
+      - '!lc_proxy/**.md'
+      - 'vendor/**'
+      - 'Makefile'
+      - 'nimbus.nimble'
+
+jobs:
+  build:
+    strategy:
+      fail-fast: false
+      max-parallel: 20
+      matrix:
+        target:
+          - os: linux
+            cpu: amd64
+          - os: linux
+            cpu: i386
+          - os: macos
+            cpu: amd64
+          - os: windows
+            cpu: amd64
+        include:
+          - target:
+              os: linux
+            builder: ubuntu-20.04
+            shell: bash
+          - target:
+              os: macos
+            builder: macos-11
+            shell: bash
+          - target:
+              os: windows
+            builder: windows-latest
+            shell: msys2 {0}
+
+    defaults:
+      run:
+        shell: ${{ matrix.shell }}
+
+    name: '${{ matrix.target.os }}-${{ matrix.target.cpu }}'
+    runs-on: ${{ matrix.builder }}
+    steps:
+      - name: Checkout nimbus-eth1
+        uses: actions/checkout@v2
+
+      - name: Derive environment variables
+        shell: bash
+        run: |
+          if [[ '${{ matrix.target.cpu }}' == 'amd64' ]]; then
+            PLATFORM=x64
+          else
+            PLATFORM=x86
+          fi
+          echo "PLATFORM=${PLATFORM}" >> $GITHUB_ENV
+
+          # libminiupnp / natpmp
+          if [[ '${{ runner.os }}' == 'Linux' && '${{ matrix.target.cpu }}' == 'i386' ]]; then
+            export CFLAGS="${CFLAGS} -m32 -mno-adx"
+            echo "CFLAGS=${CFLAGS}" >> $GITHUB_ENV
+          fi
+
+          ncpu=''
+          case '${{ runner.os }}' in
+          'Linux')
+            ncpu=$(nproc)
+            ;;
+          'macOS')
+            ncpu=$(sysctl -n hw.ncpu)
+            ;;
+          'Windows')
+            ncpu=${NUMBER_OF_PROCESSORS}
+            ;;
+          esac
+          [[ -z "$ncpu" || $ncpu -le 0 ]] && ncpu=1
+          echo "ncpu=${ncpu}" >> $GITHUB_ENV
+
+      - name: Install build dependencies (Linux i386)
+        if: runner.os == 'Linux' && matrix.target.cpu == 'i386'
+        run: |
+          sudo dpkg --add-architecture i386
+          sudo apt-fast update -qq
+          sudo DEBIAN_FRONTEND='noninteractive' apt-fast install \
+            --no-install-recommends -yq gcc-multilib g++-multilib
+          mkdir -p external/bin
+          cat << EOF > external/bin/gcc
+          #!/bin/bash
+          exec $(which gcc) -m32 -mno-adx "\$@"
+          EOF
+          cat << EOF > external/bin/g++
+          #!/bin/bash
+          exec $(which g++) -m32 -mno-adx "\$@"
+          EOF
+          chmod 755 external/bin/gcc external/bin/g++
+          echo "${{ github.workspace }}/external/bin" >> $GITHUB_PATH
+
+      # Required for running the local testnet script
+      - name: Install build dependencies (MacOS)
+        if: runner.os == 'macOS'
+        run: |
+          brew install gnu-getopt
+          brew link --force gnu-getopt
+
+      - name: MSYS2 (Windows i386)
+        if: runner.os == 'Windows' && matrix.target.cpu == 'i386'
+        uses: msys2/setup-msys2@v2
+        with:
+          path-type: inherit
+          msystem: MINGW32
+          install: >-
+            base-devel
+            git
+            mingw-w64-i686-toolchain
+
+      - name: MSYS2 (Windows amd64)
+        if: runner.os == 'Windows' && matrix.target.cpu == 'amd64'
+        uses: msys2/setup-msys2@v2
+        with:
+          path-type: inherit
+          install: >-
+            base-devel
+            git
+            mingw-w64-x86_64-toolchain
+
+      - name: Restore Nim DLLs dependencies (Windows) from cache
+        if: runner.os == 'Windows'
+        id: windows-dlls-cache
+        uses: actions/cache@v2
+        with:
+          path: external/dlls-${{ matrix.target.cpu }}
+          key: 'dlls-${{ matrix.target.cpu }}-lc-proxy'
+
+      - name: Install DLLs dependencies (Windows)
+        if: >
+          steps.windows-dlls-cache.outputs.cache-hit != 'true' &&
+          runner.os == 'Windows'
+        run: |
+          DLLPATH=external/dlls-${{ matrix.target.cpu }}
+          mkdir -p external
+          curl -L "https://nim-lang.org/download/windeps.zip" -o external/windeps.zip
+          7z x -y external/windeps.zip -o"$DLLPATH"
+
+      - name: Path to cached dependencies (Windows)
+        if: >
+          runner.os == 'Windows'
+        run: |
+          echo '${{ github.workspace }}'"/external/dlls-${{ matrix.target.cpu }}" >> $GITHUB_PATH
+
+      - name: Get latest nimbus-build-system commit hash
+        id: versions
+        run: |
+          getHash() {
+            git ls-remote "https://github.com/$1" "${2:-HEAD}" | cut -f 1
+          }
+          nbsHash=$(getHash status-im/nimbus-build-system)
+          echo "::set-output name=nimbus_build_system::$nbsHash"
+
+      - name: Restore prebuilt Nim binaries from cache
+        id: nim-cache
+        uses: actions/cache@v2
+        with:
+          path: NimBinaries
+          key: 'nim-${{ matrix.target.os }}-${{ matrix.target.cpu }}-${{ steps.versions.outputs.nimbus_build_system }}-lc-proxy'
+
+      - name: Build Nim and Nimbus-eth1 dependencies
+        run: |
+          make -j${ncpu} ARCH_OVERRIDE=${PLATFORM} CI_CACHE=NimBinaries update
+
+      - name: Run lc proxy tests (Windows)
+        if: runner.os == 'Windows'
+        run: |
+          gcc --version
+          DEFAULT_MAKE_FLAGS="-j${ncpu}"
+          mingw32-make ${DEFAULT_MAKE_FLAGS} lc-proxy
+          build/lc_proxy.exe --help
+          mingw32-make ${DEFAULT_MAKE_FLAGS} lc-proxy-test
+
+      - name: Run lc proxy tests (Linux)
+        if: runner.os == 'Linux'
+        run: |
+          export LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:/usr/local/lib"
+          DEFAULT_MAKE_FLAGS="-j${ncpu}"
+          env CC=gcc make ${DEFAULT_MAKE_FLAGS} lc-proxy
+          build/lc_proxy --help
+          # CC is needed to select correct compiler 32/64 bit
+          env CC=gcc CXX=g++ make ${DEFAULT_MAKE_FLAGS} lc-proxy-test
+
+      - name: Run lc proxy tests (Macos)
+        if: runner.os == 'Macos'
+        run: |
+          DEFAULT_MAKE_FLAGS="-j${ncpu}"
+          make ${DEFAULT_MAKE_FLAGS} lc-proxy
+          build/lc_proxy --help
+          # "-static" option will not work for osx unless static system libraries are provided
+          make ${DEFAULT_MAKE_FLAGS} lc-proxy-test
diff --git a/lc_proxy/README.md b/lc_proxy/README.md
new file mode 100644
index 000000000..49048317e
--- /dev/null
+++ b/lc_proxy/README.md
@@ -0,0 +1,3 @@
+# Light Client Proxy
+
+Wip