AWS AppSync MCP Server: Setup for Claude, Cursor and Other Apps

• Creates a GraphQL API in AppSync

  Sets up a new GraphQL API with the name and sign-in method you choose.

  Try: “Create a GraphQL API called orders-api that uses API key sign-in.”

  Write · create_graphql_api

• Creates a new AppSync API

  Creates an AppSync API from a name, with optional owner contact, tags and event configuration. Use create_graphql_api for a GraphQL API.

  Try: “Create an AppSync API named live-updates.”

  Write · create_api

• Adds a GraphQL schema to an API

  Uploads a GraphQL schema to an existing API and waits until AppSync finishes processing it.

  Try: “Add this schema to the orders-api API and tell me when it is ready.”

  Write · create_schema

• Connects an API to a data source

  Creates a data source that links the API to a service such as DynamoDB, Lambda or RDS.

  Try: “Connect orders-api to my DynamoDB table named orders.”

  Write · create_datasource

• Connects a GraphQL field to a data source

  Creates a resolver that tells AppSync how to fetch or save data for one field in your schema.

  Try: “Add a resolver for Query.getOrder that reads from the orders data source.”

  Write · create_resolver

• Creates a reusable AppSync function

  Creates a function that resolvers can chain together for multi-step logic.

  Try: “Create a function that checks a user's role before a mutation runs.”

  Write · create_function

• Creates an API key for an API

  Creates a key that clients can use to call the API.

  Try: “Make an API key for orders-api.”

  Write · create_api_key

• Turns on caching for an API

  Creates a cache for the GraphQL API to speed up repeated requests.

  Try: “Add a small cache to orders-api.”

  Write · create_api_cache

• Sets up a custom domain for AppSync

  Creates a custom domain name you can attach to your AppSync APIs.

  Try: “Create a custom domain api.example.com for AppSync using my certificate.”

  Write · create_domain_name

• Adds a channel namespace for real-time events

  Creates a channel namespace on an API so clients can publish and subscribe to real-time events.

  Try: “Add a channel namespace called chat to live-updates.”

  Write · create_channel_namespace

Watch out for

• Needs --allow-write, which lets it create AWS resources

  All 10 tools create something and fail without the flag. Turn it on only with an AWS profile limited to a test account.

• It can create API keys and public domains

  A key lets anyone who holds it call the API. Check what the assistant created in the AppSync console before sharing anything.

• It has no delete or list tools

  You cannot clean up through the assistant, so remove test resources in the AWS console.

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