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Simfinity.js

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Simfinity.js is a Node.js framework for building GraphQL backends from GraphQLObjectType definitions. It generates queries, CRUD mutations, relationships and database storage mappings, with separate MongoDB/Mongoose and PostgreSQL adapters.

Official project overview: GraphQL types, generated operations and optional MCP tools.

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  • New

Updated

  • Updated Sep 2026

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  • Node.JS  Requires Node.js 18.18 or newer and GraphQL 16. Choose MongoDB/Mongoose or PostgreSQL 15+ for storage.
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  •  7 Stars
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What is Simfinity.js?

Simfinity.js is a Node.js framework for building GraphQL backends from GraphQLObjectType definitions. It generates queries, CRUD mutations, relationships and database storage mappings, with separate MongoDB/Mongoose and PostgreSQL adapters.

Applications can add validation, lifecycle hooks and authorization rules around the generated API. Authentication and trusted request context stay under the application's control. The optional MCP package exposes selected operations as tools without coupling the integration to either database.

The project is released under Apache-2.0 and includes runnable starter applications. PostgreSQL uses native tables, UUIDs and foreign keys. MongoDB generated mutations require a replica set or sharded cluster for transaction support.