Firebase Data Connect

This skill helps Claude build Firebase backends with PostgreSQL through GraphQL schemas, handling everything from table definitions to type-safe SDK generation across Web, iOS, Android, and Flutter. It defaults to GraphQL operations for type safety but can drop into raw SQL when you need PostgreSQL-specific features like PostGIS or window functions. The workflow is structured around schema definition, authorized operations with row-level security, and real-time subscriptions. Particularly solid on the security model since Firebase Data Connect (now SQL Connect) is secure by default, requiring explicit auth directives. If you're tired of managing your own Postgres infrastructure or want Firebase Auth integration with relational data, this handles the boilerplate and generates client code that actually knows your schema.

GitHub stars: 348
last updated: Jun 10, 2026

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Install

$ npx -y skills add firebase/agent-skills --skill firebase-data-connect --agent claude-code

Installs into .claude/skills of the current project.

Files

Firebase SQL Connect

Firebase SQL Connect is a relational database service using Cloud SQL for PostgreSQL with GraphQL schema, auto-generated queries/mutations, and type-safe SDKs.

[!NOTE] Product Rename: Firebase Data Connect was renamed to Firebase SQL Connect. All instructions, references, and examples in this skill repository referring to "Data Connect" or "Firebase Data Connect" apply to "SQL Connect" and "Firebase SQL Connect" as well.

Project Structure

dataconnect/
├── dataconnect.yaml      # Service configuration
├── seed_data.gql         # LOCAL ONLY — prototype/test data
├── schema/
│   └── schema.gql        # Data model (types with @table)
└── connector/
    ├── connector.yaml    # Connector config + SDK generation
    ├── queries.gql       # Queries
    └── mutations.gql     # Mutations

Key Tools for Validation

Rely on these two mechanisms to ensure project correctness:

Review GraphQL Schema: Both user-defined and generated extensions (in .dataconnect/schema/main/).
Validate Operations: Run npx -y firebase-tools@latest dataconnect:compile against the schema.

SKILL.md on GitHub