What is oracle-mcp-server CLAUDE.md?

Instructions for an MCP server that lets AI assistants inspect and query Oracle databases. Oracle Database is a system for storing structured application data, and MCP is a standard way for tools to communicate with AI assistants.

Starting the server, enabling development mode, configuring an Oracle connection, supporting multiple database schemas, and using database inspection and query features.

It explains how to install, run, and connect the server so database access can be tested with the required credentials and settings.

How git-scarrow/oracle-mcp-server configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to git-scarrow/oracle-mcp-server. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/git-scarrow/oracle-mcp-server/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/git-scarrow/oracle-mcp-server

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

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Your own site

<a href="https://agentmods.dev/instructions/git-scarrow/oracle-mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/git-scarrow/oracle-mcp-server/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/git-scarrow/oracle-mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/git-scarrow/oracle-mcp-server/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,171 This file is loaded in full into every session.

When invoked 1,171 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.01171	$0.01171
Opus 5.5	$0.00468	$0.00468
Sonnet 5.5	$0.00234	$0.00234
Haiku 4.5	$0.00117	$0.00117

Measured 2mo ago against content hash d1dfe81018e4, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

oracle-mcp-server CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 146 lines

How it starts

The opening of the file, as written. The whole thing — 146 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

This is an Oracle MCP Server that provides a flexible interface for AI assistants to interact with Oracle databases through the Model Context Protocol. The server supports multiple schemas and provides comprehensive database introspection and query capabilities.

Common Development Commands

Running the Server

# Install dependencies
npm install

# Start the MCP server
npm start

# Run in development mode with file watching
npm run dev

Testing Connection

# Set environment variables first
export ORACLE_CONNECTION_STRING=hostname:1521/service_name
export ORACLE_USER=your_username
export ORACLE_PASSWORD=your_password

# Run the server
npm start

Architecture

MCP Server Implementation

Framework: Model Context Protocol (MCP) SDK
Database: Oracle Database with oracledb client library
Connection: Supports multiple authentication methods (Easy Connect, TNS, individual components)
Transport: stdio (stdin/stdout for JSON-RPC communication)

Core Components

Main Server (src/index.js):
- Extends MCP Server with Oracle database integration
- Implements 6 tools for database operations
- Supports multiple Oracle connection methods
- Automatically converts PostgreSQL-style parameters to Oracle bind variables
Available Tools:
- execute_query - Execute any SQL query with parameter binding (supports SELECT, INSERT, UPDATE, DELETE, etc.)
- list_tables - List tables from specified schema or all accessible schemas
- describe_table - Get table structure and column details (searches all schemas if not specified)
- get_table_indexes - View indexes on a specific table (searches all schemas if not specified)
- get_table_constraints - View constraints (PK, FK, unique, check) for a table
- list_schemas - List all accessible schemas in the database

Read the full file on GitHub · 146 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 146 lines · 1,171 tokens per session scan A d1dfe81018e4

Subscribe to this mod's changes

oracle-mcp-server CLAUDE.md is an instructions file published in the GitHub repository git-scarrow/oracle-mcp-server (11 stars, last pushed 2mo ago), licensed MIT. It adds 1,171 tokens to every session, about $0.0047 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

oracle-mcp-server CLAUDE.md next to 6 instructions from other repositories
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oracle-mcp-server: Instructions file for Claude Code