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feat: Add standalone MCP server as a first-class component by patelchaitany · Pull Request #6957 · feast-dev/feast · GitHub

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feat: Add standalone MCP server as a first-class component #6957

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Merged
ntkathole merged 2 commits into from
Oct 7, 2026
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feat: Add standalone MCP server as a first-class component #6957

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963d38a
feat: Add standalone MCP server as a first-class component
patelchaitany Oct 6, 2026
1870e37
ci: Publish the feast-mcp image to quay.io
patelchaitany Oct 7, 2026
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47 changes: 47 additions & 0 deletions .github/workflows/publish_images.yml
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Expand Up @@ -100,3 +100,50 @@ jobs:
docker push ${REGISTRY}/${{ matrix.component }}:latest
fi
fi

# The feast-mcp image is a thin wrapper over the feature-server image, so it
# cannot be built in the matrix above -- its base has to be pushed first.
build-publish-feast-mcp-image:
if: github.repository == 'feast-dev/feast'
needs: build-publish-docker-images
runs-on: ubuntu-latest
env:
REGISTRY: quay.io/feastdev
steps:
- uses: actions/checkout@v4
with:
ref: ${{ github.event.inputs.ref || github.ref }}
submodules: 'true'
- id: get-version
uses: ./.github/actions/get-semantic-release-version
with:
custom_version: ${{ github.event.inputs.custom_version }}
token: ${{ github.event.inputs.token }}
- name: Set up QEMU
uses: docker/setup-qemu-action@v3
- name: Set up Docker Buildx
uses: docker/setup-buildx-action@v3
with:
install: true
- name: Login to Quay.io
uses: docker/login-action@v3
with:
registry: quay.io
username: ${{ secrets.QUAYIO_USERNAME }}
password: ${{ secrets.QUAYIO_TOKEN }}
- name: Build and push image
env:
VERSION_WITHOUT_PREFIX: ${{ steps.get-version.outputs.version_without_prefix }}
run: |
make build-feast-mcp-docker REGISTRY=${REGISTRY} VERSION=${VERSION_WITHOUT_PREFIX} \
BASE_TAG=${VERSION_WITHOUT_PREFIX} DOCKER_PUSH=true DOCKER_PLATFORMS=linux/amd64,linux/arm64
- name: Push latest tag
env:
VERSION_WITHOUT_PREFIX: ${{ steps.get-version.outputs.version_without_prefix }}
HIGHEST_SEMVER_TAG: ${{ steps.get-version.outputs.highest_semver_tag }}
run: |
echo "Only push to latest tag if tag is the highest semver version $HIGHEST_SEMVER_TAG"
if [ "${VERSION_WITHOUT_PREFIX}" = "${HIGHEST_SEMVER_TAG:1}" ]
then
docker buildx imagetools create -t ${REGISTRY}/feast-mcp:latest ${REGISTRY}/feast-mcp:${VERSION_WITHOUT_PREFIX}
fi
12 changes: 6 additions & 6 deletions .secrets.baseline
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22 changes: 22 additions & 0 deletions Makefile
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Expand Up @@ -176,6 +176,14 @@ test-python-unit: ## Run Python unit tests (use pattern=<pattern> to filter test
--cov-report=term-missing \
sdk/python/tests/unit

# Standalone `feast mcp` server (feast[mcp-server] extra). Already covered by
# test-python-unit; this target is for iterating on the MCP server alone.
test-python-unit-mcp: ## Run unit tests for the standalone `feast mcp` server
uv run python -m pytest -n 4 --color=yes $(if $(pattern),-k "$(pattern)") \
--cov=sdk/python/feast/mcp \
--cov-report=term-missing \
sdk/python/tests/unit/mcp

# Fast unit tests only
test-python-unit-fast: ## Run fast unit tests only (no external dependencies)
uv run python -m pytest sdk/python/tests/unit -n auto -x --tb=short
Expand Down Expand Up @@ -755,6 +763,20 @@ build-go-feature-server-docker: ## Build Go Feature Server Docker iamge
push-go-feature-server-docker: ## Push Go Feature Server Docker image
docker push $(REGISTRY)/go-feature-server:$(VERSION)

push-feast-mcp-docker: ## Push Feast MCP Server Docker image
docker push $(REGISTRY)/feast-mcp:$(VERSION)

# Wraps an already-published feature-server image, so that image must exist
# before this builds. BASE_TAG defaults to VERSION; override it to wrap an
# older feature-server release.
build-feast-mcp-docker: ## Build Feast MCP Server Docker image
docker buildx build $(if $(DOCKER_PLATFORMS),--platform $(DOCKER_PLATFORMS),) \
--build-arg BASE_IMAGE=$(REGISTRY)/feature-server \
--build-arg BASE_TAG=$(if $(BASE_TAG),$(BASE_TAG),$(VERSION)) \
-t $(REGISTRY)/feast-mcp:$(VERSION) \
-f sdk/python/feast/mcp/docker/Dockerfile \
$(if $(filter true,$(DOCKER_PUSH)),--push,--load) sdk/python/feast/mcp/docker

##@ Dev images

build-feature-server-dev: ## Build Feature Server Dev Docker image
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2 changes: 2 additions & 0 deletions docs/SUMMARY.md
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Expand Up @@ -61,6 +61,7 @@
* [Retrieval Augmented Generation (RAG) with Feast](tutorials/rag-with-docling.md)
* [RAG Fine Tuning with Feast and Milvus](../examples/rag-retriever/README.md)
* [MCP - AI Agent Example](../examples/mcp_feature_store/README.md)
* [Standalone MCP Server Example](../examples/feast_mcp_server/README.md)
* [Feast-Powered AI Agent](../examples/agent_feature_store/README.md)
* [Demo Notebooks](tutorials/demo-notebooks.md)
* [Feature Quality Monitoring Quickstart](../examples/monitoring/monitoring-quickstart.ipynb)
Expand Down Expand Up @@ -206,6 +207,7 @@
* [Python feature server](reference/feature-servers/python-feature-server.md)
* [\[Alpha\] Go feature server](reference/feature-servers/go-feature-server.md)
* [MCP Feature Server](reference/feature-servers/mcp-feature-server.md)
* [Standalone MCP server](reference/feature-servers/mcp-server.md)
* [Offline Feature Server](reference/feature-servers/offline-feature-server.md)
* [Registry server](reference/feature-servers/registry-server.md)
* [\[Beta\] Web UI](reference/alpha-web-ui.md)
Expand Down
10 changes: 9 additions & 1 deletion docs/reference/feature-servers/README.md
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Expand Up @@ -16,4 +16,12 @@ Feast users can choose to retrieve features from a feature server, as opposed to

{% content-ref url="registry-server.md" %}
[registry-server.md](registry-server.md)
{% endcontent-ref %}
{% endcontent-ref %}

{% content-ref url="mcp-feature-server.md" %}
[mcp-feature-server.md](mcp-feature-server.md)
{% endcontent-ref %}

{% content-ref url="mcp-server.md" %}
[mcp-server.md](mcp-server.md)
{% endcontent-ref %}
2 changes: 2 additions & 0 deletions docs/reference/feature-servers/mcp-feature-server.md
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Expand Up @@ -4,6 +4,8 @@

Feast can expose the Python Feature Server as an MCP (Model Context Protocol) server using `fastapi_mcp`. When enabled, MCP clients can discover and call Feast tools such as online feature retrieval.

This mounts MCP inside the feature server process. For a separately deployable MCP server that proxies both the feature server and the registry, see the [Standalone MCP server](mcp-server.md), started with `feast mcp`.

## Installation

```bash
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