Oraclefusion

An MCP (Model Context Protocol) server for Oracle Fusion Cloud ERP. Gives any MCP-compatible AI client (Claude, Cursor, Windsurf, etc.) read-only access to your Oracle Fusion data via STDIO transport.

Authentication: Basic Auth, Oracle JWT, (WIP: OAuth via Microsoft Entra ID)

Quick start

Install and run via uvx:

{
  "mcpServers": {
    "oracle-fusion": {
      "command": "uvx",
      "args": ["mcp-oraclefusion"],
      "env": {
        "ORACLE_FUSION_BASE_URL": "https://your-oracle-instance.fa.ocs.oraclecloud.com",
        "ORACLE_USERNAME": "[email protected]",
        "ORACLE_PASSWORD": "your_oracle_password"
      }
    }
  }
}

Or run directly:

pip install mcp-oraclefusion
export ORACLE_FUSION_BASE_URL=https://your-oracle-instance.fa.ocs.oraclecloud.com
export [email protected]
export ORACLE_PASSWORD=your_oracle_password
mcp-oraclefusion

What you can do

Ask natural-language questions about your Oracle Fusion data:

• "Show me all invoices from Google in Q1 2025"
• "Find open purchase orders from Dell over $50,000"
• "What's the USD to EUR corporate exchange rate for January 2025?"
• "Search requisitions pending approval in US Operations"
• "Look up supplier details for ACME Corp including sites and contacts"
• "Show AR invoices for customer XYZ"
• "Test the Oracle connection and show record counts"
• "What's the total invoice amount from Google this quarter?"
• "Break down AP spend by supplier, top 10"
• "What percentage of total spend is each business unit?"

Tools (30 read + 7 write)

Accounts Payable

search_invoices, get_invoice_details, search_payments, get_payment_details, list_payment_terms

Procurement

search_purchase_orders, get_po_details, search_suppliers, get_supplier_details, search_requisitions, search_receiving_receipts, search_approved_suppliers, search_categories

General Ledger

search_journal_batches, search_gl_balances, list_ledgers, list_chart_of_accounts, search_currency_rates

Accounts Receivable

search_ar_invoices, get_ar_invoice_details, search_receipts

Expenses & HCM

search_expense_reports, search_user_accounts

Infrastructure

test_oracle_connection

Math / Aggregation

aggregate_records, sumif_records, group_by_aggregate, lookup_record, percentage_of_total, safe_divide

These tools run locally — no Oracle API calls. They use Python Decimal arithmetic to avoid float drift on currency values. The LLM fetches records with the search tools above, then passes them to these tools for exact computation (sums, averages, conditional aggregation, group-by pivots, percentages, ratios).

Write tools (set MCP_MODE=full to enable)

create_purchase_order, update_po_distribution, change_po_status, create_invoice, change_invoice_status, create_requisition, change_requisition_status

Configuration

Env var	Required	Description
ORACLE_FUSION_BASE_URL	Yes	Your Oracle Fusion instance URL
ORACLE_USERNAME	Yes	Your Oracle Fusion username (email)
ORACLE_PASSWORD	If no JWT	Your Oracle Fusion password
ORACLE_FUSION_API_VERSION	No	REST API version (default 11.13.18.05)
MCP_MODE	No	readonly (default) or full (enables write tools)
LOG_LEVEL	No	WARNING (default), INFO, DEBUG — logs go to stderr

OAuth / Microsoft Entra ID (coming soon)

OAuth login via Microsoft Entra ID is supported for multi-user deployments where each user authenticates with their corporate identity. This is currently being tested internally and will be documented once validated.

JWT authentication (alternative to password)

Instead of a password you can authenticate with an RSA private key + certificate registered in Oracle's Security Console (API Authentication). Set these env vars and omit ORACLE_PASSWORD:

Env var	Description
ORACLE_JWT_PRIVATE_KEY_PATH	Path to the RSA private key PEM file
ORACLE_JWT_PRIVATE_KEY	Inline PEM key (alternative to path, useful in containers)
ORACLE_JWT_CERT_PATH	Path to the matching X.509 certificate PEM file
ORACLE_JWT_ISSUER	Trusted issuer value configured in Oracle

The server tries JWT first and falls back to Basic Auth if the JWT vars are not set.

Oracle REST API notes

• Query filters use Oracle syntax: conditions joined with ; (AND), string matching with LIKE '*term*'
• Some fields are not queryable (x-queryable: false) — the server uses finders or client-side filtering
• CLOB fields are excluded from collection projections to avoid Oracle 500 errors
• The server auto-retries Oracle 500s by progressively stripping totalResults and fields params
• Status changes use Oracle action endpoints (POST /resource/{id}/action/{name}), not PATCH
• Supplier names are UPPERCASE in Oracle
• Pagination via limit/offset; hasMore indicates additional pages

Requirements

• Python 3.10+
• Oracle Fusion Cloud instance with REST API access and a user account

Author

Wanis Elabbar

License

MIT