Full AppSync Compatibility
Complete implementation of AppSync JavaScript resolver context, utilities, and runtime behavior.
Multiple Data Sources
Support for DynamoDB, Lambda, HTTP, RDS (PostgreSQL/MySQL), and NONE data sources.
Authentication
API Key, AWS Lambda, Cognito User Pools, OpenID Connect, and IAM authentication modes.
Pipeline Resolvers
Full support for pipeline resolvers with before/after mapping templates and function chains.
Validation
Built-in validation for GraphQL schemas, resolver coverage, and AppSync JavaScript compatibility.
TypeScript
Written in TypeScript with full type definitions for excellent IDE support.
Quick Start
# Install globally
npm install -g appsync-local-server
# Or use npx
npx appsync-local-server start
# With a config file
appsync-local start -c appsync-config.jsonExample Configuration
{
"schema": "schema.graphql",
"port": 4000,
"apiConfig": {
"auth": [{ "type": "API_KEY", "key": "da2-local-api-key" }]
},
"dataSources": [
{ "name": "UsersTable", "type": "AMAZON_DYNAMODB", "config": { "tableName": "Users" } }
],
"resolvers": [
{ "typeName": "Query", "fieldName": "getUser", "dataSource": "UsersTable", "code": "resolvers/getUser.js" }
]
}