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| -# Apollo MCP Server |
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| - |
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| -An MCP Server to expose a pre-defined set of GraphQL operations as MCP tools. Optionally provides introspection |
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| -tools to allow an LLM to generate and execute its own ad hoc operations. |
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| - |
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| -# Running the Example |
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| - |
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| -The repo has an example schema in `graphql/weather/weather.graphql`, and an example set of operations in `graphql/weather/operations/*.graphql`. |
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| - |
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| -First, build the repo with: |
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| - |
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| -```sh |
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| -cargo build |
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| -``` |
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| - |
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| -Next, run the graph in the Apollo Router: |
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| - |
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| -```sh |
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| -rover dev --supergraph-config ./graphql/weather/supergraph.yaml |
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| -``` |
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| - |
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| -## MCP Inspector |
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| - |
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| -You can run the MCP Server with [MCP Inspector](https://modelcontextprotocol.io/docs/tools/inspector). |
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| - |
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| -### Stdio Transport |
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| - |
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| -You can run the MCP inspector with the stdio transport as follows: |
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| - |
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| -```sh |
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| -npx @modelcontextprotocol/inspector \ |
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| - target/debug/apollo-mcp-server \ |
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| - --directory <absolute path to this git repo> \ |
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| - -s graphql/weather/api.graphql \ |
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| - -o graphql/weather/operations/forecast.graphql graphql/weather/operations/alerts.graphql graphql/weather/operations/all.graphql |
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| -``` |
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| - |
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| -Press "Connect" in the MCP Inspector and "List Tools" to see the list of available tools. |
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| - |
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| -### HTTP+SSE Transport |
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| - |
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| -To use the SSE transport with MCP Inspector, first start the MCP server in SEE mode: |
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| - |
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| -```sh |
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| -target/debug/apollo-mcp-server \ |
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| - --directory <absolute path to this git repo> \ |
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| - --sse-port 5000 -s graphql/weather/api.graphql \ |
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| - -o graphql/weather/operations/forecast.graphql graphql/weather/operations/alerts.graphql graphql/weather/operations/all.graphql |
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| -``` |
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| - |
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| -Now start the MCP Inspector: |
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| - |
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| -```sh |
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| -npx @modelcontextprotocol/inspector |
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| -``` |
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| - |
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| -Set the transport to SSE in the inspector and the URL to `http://localhost:5000/sse`, then press "Connect" in MCP Inspector. |
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| - |
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| -## MCP Client |
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| - |
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| -You can use the MCP Server with your favorite MCP client. |
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| - |
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| -### Client Configuration |
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| - |
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| -For Claude Desktop, the configuration file is in the following location on MacOS: |
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| - |
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| -```sh |
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| -~/Library/Application\ Support/Claude/claude_desktop_config.json |
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| -``` |
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| - |
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| -For Cursor, you can find the file by opening the MCP tab in Settings. |
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| - |
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| -#### Stdio Transport |
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| - |
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| -To use the stdio transport, add the following to the MCP configuration file for you client, using the absolute path to this Git repo: |
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| - |
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| -```json |
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| -{ |
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| - "mcpServers": { |
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| - "weather": { |
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| - "command": "<absolute path to repo>/target/debug/apollo-mcp-server", |
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| - "args": [ |
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| - "--directory", |
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| - "<absolute path to repo>", |
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| - "--schema", |
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| - "graphql/weather/api.graphql", |
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| - "--operations", |
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| - "graphql/weather/operations/forecast.graphql", |
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| - "graphql/weather/operations/alerts.graphql", |
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| - "graphql/weather/operations/all.graphql" |
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| - ] |
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| - } |
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| - } |
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| -} |
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| -``` |
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| - |
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| -#### HTTP+SEE Transport |
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| - |
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| -To use the HTTP+SSE transport, first start the MCP server as described above for MCP Inspector. |
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| - |
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| -For Claude Desktop, you can use [`mcp-remote`](https://www.npmjs.com/package/mcp-remote/v/latest?activeTab=readme) to give Claude access to the MCP Server over SSE: |
| 1 | +<div align="center"> |
| 2 | +<a href="https://www.apollographql.com/"><img src="https://raw.githubusercontent.com/apollographql/apollo-client-devtools/main/assets/apollo-wordmark.svg" height="100" alt="Apollo Client"></a> |
| 3 | +</div> |
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|
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| -```json |
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| -{ |
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| - "mcpServers": { |
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| - "weather": { |
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| - "command": "npx", |
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| - "args": [ |
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| - "mcp-remote", |
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| - "http://127.0.0.1:5000/sse", |
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| - "--transport", |
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| - "sse-first" |
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| - ] |
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| - } |
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| - } |
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| -} |
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| -``` |
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| - |
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| -For Cursor, you can directly specify the SSE URL: |
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| - |
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| -```json |
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| -{ |
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| - "mcpServers": { |
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| - "weather": { |
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| - "url": "http://127.0.0.1:5000/sse" |
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| - } |
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| - } |
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| -} |
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| -``` |
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| - |
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| -### Usage |
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| - |
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| -Restart your AI agent. You should now see the tools successfully registered. For example, in Claude Desktop, you should see a small hammer icon with the number of tools next to it. |
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| - |
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| -You can now issue prompts related to weather forecasts and alerts, which will call out to the tools and invoke the GraphQL operations. |
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| - |
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| -**Note** that due to current limitations of Apollo Connectors, the schema is using a hard-coded weather forecast link, so the forecast will be for a fixed location. |
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| - |
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| -#### Persisted Queries Manifests |
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| - |
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| -The MCP server also supports reading operations from an |
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| -[Apollo](https://www.apollographql.com/docs/graphos/platform/security/persisted-queries#manifest-format) formatted |
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| -persisted query manifest file through the use of the `--manifest` flag. |
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| - |
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| -An example is included in `graphql/weather/persisted_queries`. |
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| - |
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| -```sh |
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| -target/debug/apollo-mcp-server \ |
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| - --directory <absolute path to this git repo> \ |
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| - -s graphql/weather/api.graphql \ |
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| - --header "apollographql-client-name:my-web-app" \ |
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| - --manifest graphql/weather/persisted_queries/apollo.json |
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| -``` |
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| - |
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| -Note that when using persisted queries, if your queries are registered with a specific client name instead of `null`, |
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| -you will need to configure the MCP server to send the necessary header indicating the client name to the router. This |
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| -header is `apollographql-client-name` by default, but can be overridden in the router config by setting |
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| -`telemetry.apollo.client_name_header`. Note that in the example persisted query manifest file, the client name |
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| -is `my-web-app`. |
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| - |
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| -This supports hot-reloading, so changes to the persisted query manifest file will be picked up by the MCP server |
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| -without restarting. |
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| - |
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| -#### Uplink |
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| - |
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| -The MCP server can also read persisted queries from Uplink using the `--uplink` option. This supports hot-reloading, |
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| -so it will pick up changes from GraphOS automatically, without restarting the MCP server. |
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| - |
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| -You must set the `APOLLO_KEY` and `APOLLO_GRAPH_REF` environment variables to use Uplink. It is recommended to use |
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| -a contract variant of your graph, with a PQ list associated with that variant. That way, you control exactly what |
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| -persisted queries are available to the MCP server. |
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| - |
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| -```sh |
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| -target/debug/apollo-mcp-server \ |
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| - --directory <absolute path to this git repo> \ |
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| - -s graphql/weather/api.graphql \ |
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| - --header "apollographql-client-name:my-web-app" \ |
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| - --uplink |
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| -``` |
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| - |
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| -# Running Your Own Graph |
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| - |
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| -You can easily run the server with your own GraphQL schema and operations. For example with the stdio transport: |
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| - |
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| -```json |
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| -{ |
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| - "mcpServers": { |
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| - "<name for your server>": { |
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| - "command": "<absolute path to repo>/target/debug/apollo-mcp-server", |
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| - "args": [ |
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| - "--directory", |
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| - "<absolute path to the directory containing your schema and operations file>", |
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| - "--schema", |
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| - "<relative path from the directory specified above to the schema>", |
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| - "--operations", |
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| - "<relative path from the directory specified above to the operation files>", |
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| - "--endpoint", |
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| - "<your GraphQL endpoint>" |
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| - ] |
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| - } |
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| - } |
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| -} |
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| -``` |
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| - |
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| -The operation files are just `.graphql` files, with each file containing a single operation. Make sure to give your operations meaningful names, and document your schema as much as possible. |
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| - |
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| -Run your schema in Apollo Router at the endpoint given in your configuration file. |
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| - |
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| -Use MCP Inspector, or in Claude Desktop, click the hammer icon to see the description generated for your tools. |
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| - |
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| -# Introspection |
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| - |
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| -You can optionally enable support for allowing the AI model to introspect the schema and formulate its own queries. It is recommended that this only be done with a Contract variant schema, so you can control what parts of your schema are exposed to the model. |
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| - |
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| -To enable this mode, add `--introspect` to the MCP server command line. |
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| - |
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| -Two new tools will be exposed by the server: |
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| - |
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| -* `introspect` - returns information about GraphQL schema types |
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| -* `execute` - executes an operation on the GraphQL endpoint |
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| - |
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| -The MCP client can then use these tools to provide schema information to the model, and allow the model to execute GraphQL operations based on that schema. |
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| - |
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| -# Running in a Container |
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| - |
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| -The MCP server is also available as a standalone docker container. The following command |
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| -demonstrates how to use the container. Refer to previous sections for all valid |
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| -server arguments. |
| 5 | +# Apollo MCP Server |
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|
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| -By default, the container expects all schema files to be present in the |
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| -`/data` folder within the container, so make sure to mount your files there. The |
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| -example below uses the provided weather example for reference |
| 7 | +An [MCP](https://modelcontextprotocol.io/) Server to expose GraphQL operations as MCP tools. |
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|
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| -```sh |
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| -docker run \ |
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| - -it --rm \ |
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| - --name apollo-mcp-server \ |
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| - -p 5000:5000 \ |
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| - -v $PWD/graphql/weather:/data \ |
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| - ghcr.io/apollographql/apollo-mcp:latest \ |
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| - --sse-port 5000 \ |
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| - -s api.graphql \ |
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| - # Other MCP server options... |
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| -``` |
| 9 | +See [the documentation](https://www.apollographql.com/docs/apollo-mcp-server/) for details. |
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|
246 | 11 | # Licensing
|
247 | 12 |
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