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Prism Coder

Prism Coder is an MCP server that adds database tools to AI assistants such as Claude Desktop, Claude Code and Cursor. Session memory for coding agents: local-first recall, drift detection, on-device inference. It has 157 GitHub stars, is released under the Apache-2.0 license and runs locally with npx -y prism-mcp-server.

github.com/dcostenco/prism-coder (opens in a new tab)

  • Needs API key
  • Databases
  • Apache-2.0
  • Actively maintained
View on GitHub (opens in a new tab)

Install Prism Coder

Generated from the server's MCP registry entry. Replace your-value with your own values.

Claude Desktop

claude_desktop_config.json
{
  "mcpServers": {
    "prism-coder": {
      "command": "npx",
      "args": [
        "-y",
        "prism-mcp-server"
      ],
      "env": {
        "BRAVE_API_KEY": "your-value",
        "GEMINI_API_KEY": "your-value",
        "SUPABASE_KEY": "your-value"
      }
    }
  }
}

Settings > Developer > Edit Config. macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\. Restart Claude Desktop afterwards.

Claude Code

claude mcp add --env BRAVE_API_KEY=your-value --env GEMINI_API_KEY=your-value --env SUPABASE_KEY=your-value --transport stdio prism-coder -- npx -y prism-mcp-server

Cursor

.cursor/mcp.json
{
  "mcpServers": {
    "prism-coder": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "prism-mcp-server"
      ],
      "env": {
        "BRAVE_API_KEY": "your-value",
        "GEMINI_API_KEY": "your-value",
        "SUPABASE_KEY": "your-value"
      }
    }
  }
}

Project file; use ~/.cursor/mcp.json to enable it in every project.

VS Code

.vscode/mcp.json
{
  "inputs": [
    {
      "type": "promptString",
      "id": "brave_api_key",
      "description": "BRAVE_API_KEY",
      "password": true
    },
    {
      "type": "promptString",
      "id": "gemini_api_key",
      "description": "GEMINI_API_KEY",
      "password": true
    },
    {
      "type": "promptString",
      "id": "supabase_key",
      "description": "SUPABASE_KEY",
      "password": true
    }
  ],
  "servers": {
    "prism-coder": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "prism-mcp-server"
      ],
      "env": {
        "BRAVE_API_KEY": "${input:brave_api_key}",
        "GEMINI_API_KEY": "${input:gemini_api_key}",
        "SUPABASE_KEY": "${input:supabase_key}"
      }
    }
  }
}

Config formats checked against the official docs on Oct 7, 2026: modelcontextprotocol.io (opens in a new tab), code.claude.com (opens in a new tab), cursor.com (opens in a new tab), code.visualstudio.com (opens in a new tab).

Environment variables

Variables the server reads at startup.

NameRequiredDescription
BRAVE_API_KEYsecretNoBrave Search API key for web search tools
GEMINI_API_KEYsecretNoGoogle Gemini API key for AI-powered summarization and embeddings
SUPABASE_URLNoSupabase project URL for session memory and knowledge persistence
SUPABASE_KEYsecretNoSupabase service role key for database access
PRISM_USER_IDNoUser ID for multi-tenant row-level security isolation (defaults to 'default')
GCP_PROJECT_IDNoGoogle Cloud project ID for Vertex AI Discovery Engine integration
VERTEX_LOCATIONNoVertex AI location/region (defaults to 'global')
VERTEX_DATA_STORE_IDNoVertex AI Discovery Engine data store ID for enterprise search

About Prism Coder

Give your AI agent memory that lasts — and see the cloud tokens it never had to spend. Persistent sessions, knowledge graphs, offline tool-routing, and an auditable savings meter. Fully local and free.

  • agent-memory
  • mcp
  • mcp-server
  • model-context-protocol
  • typescript
  • ai-agent
  • semantic-search
  • local-first
  • sqlite
  • vector-search

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FAQ

Prism Coder FAQ

Still curious? Email info@appsgit.com.

What is Prism Coder?

Prism Coder is an MCP server that adds database tools to AI assistants such as Claude Desktop, Claude Code and Cursor. Session memory for coding agents: local-first recall, drift detection, on-device inference. It has 157 GitHub stars, is released under the Apache-2.0 license and runs locally with npx -y prism-mcp-server. The source code is at github.com/dcostenco/prism-coder.

How do I install the Prism Coder MCP server?

Add the command npx -y prism-mcp-server to your MCP client: put it in claude_desktop_config.json for Claude Desktop, run claude mcp add for Claude Code, or add it to .cursor/mcp.json (Cursor) or .vscode/mcp.json (VS Code). The snippets on this page are ready to paste.

Is Prism Coder free?

The server is open source under the Apache-2.0 license, so running it is free. It needs credentials (BRAVE_API_KEY, GEMINI_API_KEY and SUPABASE_KEY) for the service it connects to, which may require a paid account.

Is Prism Coder actively maintained?

The most recent commit was on Oct 4, 2026. The latest release is v15.2.1, published May 10, 2026. appsgit only lists MCP servers with a commit in the last six months and re-checks every server daily.