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Mainframe Mcp Server

io.github.NotHarshhaa/mainframe-mcp-server ยท v3.0.0

MCP server for IBM z/OS jobs, datasets, USS, and operational diagnostics via Zowe SDK.

Source code Set it up

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Terminal
claude mcp add mainframe-mcp-server -e ZOSMF_HOST=<ZOSMF_HOST> -e ZOSMF_PORT=<ZOSMF_PORT> -e ZOSMF_BASE_PATH=<ZOSMF_BASE_PATH> -e ZOSMF_USER=<ZOSMF_USER> -e ZOSMF_PASSWORD=<ZOSMF_PASSWORD> -e ZOSMF_TOKEN=<ZOSMF_TOKEN> -e ZOSMF_TOKEN_TYPE=<ZOSMF_TOKEN_TYPE> -e ZOSMF_REJECT_UNAUTHORIZED=<ZOSMF_REJECT_UNAUTHORIZED> -e ZOSMF_CERT=<ZOSMF_CERT> -e ZOSMF_CERT_KEY=<ZOSMF_CERT_KEY> -e ZOSMF_TOKEN_FILE=<ZOSMF_TOKEN_FILE> -e ZOSMF_USER_ID=<ZOSMF_USER_ID> -e ZOSMF_PASSTICKET_APP=<ZOSMF_PASSTICKET_APP> -e ZOWE_TEAM_CONFIG=<ZOWE_TEAM_CONFIG> -e ZOSMF_PROFILE=<ZOSMF_PROFILE> -e LOG_LEVEL=<LOG_LEVEL> -e MCP_TRANSPORT=<MCP_TRANSPORT> -e MCP_SSE_PORT=<MCP_SSE_PORT> -e MAX_JOB_OUTPUT_LINES=<MAX_JOB_OUTPUT_LINES> -e MAX_DATASET_READ_LINES=<MAX_DATASET_READ_LINES> -e MAX_JES_SPOOL_FILES=<MAX_JES_SPOOL_FILES> -e MAX_AUDIT_LINES=<MAX_AUDIT_LINES> -e CMCI_CONTEXT=<CMCI_CONTEXT> -e CMCI_HOST=<CMCI_HOST> -e CMCI_PORT=<CMCI_PORT> -e CMCI_BASE_PATH=<CMCI_BASE_PATH> -e DB2_LOCATION=<DB2_LOCATION> -e DB2_HOST=<DB2_HOST> -e DB2_PORT=<DB2_PORT> -e DB2_BASE_PATH=<DB2_BASE_PATH> -e SMF_SUMMARY_DATASET=<SMF_SUMMARY_DATASET> -e RMF_METRICS_ENABLED=<RMF_METRICS_ENABLED> -e RACF_AUDIT_USS_PATH=<RACF_AUDIT_USS_PATH> -e RACF_AUDIT_DATASET=<RACF_AUDIT_DATASET> -e SECURITY_READ_ONLY=<SECURITY_READ_ONLY> -e SECURITY_ALLOWED_TOOLS=<SECURITY_ALLOWED_TOOLS> -e SECURITY_BLOCKED_TOOLS=<SECURITY_BLOCKED_TOOLS> -e SECURITY_ALLOWED_DATASET_PATTERNS=<SECURITY_ALLOWED_DATASET_PATTERNS> -e SECURITY_ALLOWED_USS_PATHS=<SECURITY_ALLOWED_USS_PATHS> -e SECURITY_AUDIT_LOGGING=<SECURITY_AUDIT_LOGGING> -e SECURITY_MAX_JCL_BYTES=<SECURITY_MAX_JCL_BYTES> -e SECURITY_WRITE_APPROVAL=<SECURITY_WRITE_APPROVAL> -e SECURITY_JCL_SCAN=<SECURITY_JCL_SCAN> -e SECURITY_JCL_SCAN_STRICT=<SECURITY_JCL_SCAN_STRICT> -e SECURITY_BLOCKED_PROGRAMS=<SECURITY_BLOCKED_PROGRAMS> -e SECURITY_BLOCKED_JOB_CLASSES=<SECURITY_BLOCKED_JOB_CLASSES> -e SECURITY_CHANGE_TICKET_PATTERN=<SECURITY_CHANGE_TICKET_PATTERN> -e SECURITY_WRITE_WINDOW=<SECURITY_WRITE_WINDOW> -e SECURITY_WRITE_DAYS=<SECURITY_WRITE_DAYS> -e SECURITY_WRITE_WINDOW_TZ=<SECURITY_WRITE_WINDOW_TZ> -- npx -y @notharshhaa/[email protected]
claude_desktop_config.json
{
  "mcpServers": {
    "mainframe-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@notharshhaa/[email protected]"
      ],
      "env": {
        "ZOSMF_HOST": "<ZOSMF_HOST>",
        "ZOSMF_PORT": "<ZOSMF_PORT>",
        "ZOSMF_BASE_PATH": "<ZOSMF_BASE_PATH>",
        "ZOSMF_USER": "<ZOSMF_USER>",
        "ZOSMF_PASSWORD": "<ZOSMF_PASSWORD>",
        "ZOSMF_TOKEN": "<ZOSMF_TOKEN>",
        "ZOSMF_TOKEN_TYPE": "<ZOSMF_TOKEN_TYPE>",
        "ZOSMF_REJECT_UNAUTHORIZED": "<ZOSMF_REJECT_UNAUTHORIZED>",
        "ZOSMF_CERT": "<ZOSMF_CERT>",
        "ZOSMF_CERT_KEY": "<ZOSMF_CERT_KEY>",
        "ZOSMF_TOKEN_FILE": "<ZOSMF_TOKEN_FILE>",
        "ZOSMF_USER_ID": "<ZOSMF_USER_ID>",
        "ZOSMF_PASSTICKET_APP": "<ZOSMF_PASSTICKET_APP>",
        "ZOWE_TEAM_CONFIG": "<ZOWE_TEAM_CONFIG>",
        "ZOSMF_PROFILE": "<ZOSMF_PROFILE>",
        "LOG_LEVEL": "<LOG_LEVEL>",
        "MCP_TRANSPORT": "<MCP_TRANSPORT>",
        "MCP_SSE_PORT": "<MCP_SSE_PORT>",
        "MAX_JOB_OUTPUT_LINES": "<MAX_JOB_OUTPUT_LINES>",
        "MAX_DATASET_READ_LINES": "<MAX_DATASET_READ_LINES>",
        "MAX_JES_SPOOL_FILES": "<MAX_JES_SPOOL_FILES>",
        "MAX_AUDIT_LINES": "<MAX_AUDIT_LINES>",
        "CMCI_CONTEXT": "<CMCI_CONTEXT>",
        "CMCI_HOST": "<CMCI_HOST>",
        "CMCI_PORT": "<CMCI_PORT>",
        "CMCI_BASE_PATH": "<CMCI_BASE_PATH>",
        "DB2_LOCATION": "<DB2_LOCATION>",
        "DB2_HOST": "<DB2_HOST>",
        "DB2_PORT": "<DB2_PORT>",
        "DB2_BASE_PATH": "<DB2_BASE_PATH>",
        "SMF_SUMMARY_DATASET": "<SMF_SUMMARY_DATASET>",
        "RMF_METRICS_ENABLED": "<RMF_METRICS_ENABLED>",
        "RACF_AUDIT_USS_PATH": "<RACF_AUDIT_USS_PATH>",
        "RACF_AUDIT_DATASET": "<RACF_AUDIT_DATASET>",
        "SECURITY_READ_ONLY": "<SECURITY_READ_ONLY>",
        "SECURITY_ALLOWED_TOOLS": "<SECURITY_ALLOWED_TOOLS>",
        "SECURITY_BLOCKED_TOOLS": "<SECURITY_BLOCKED_TOOLS>",
        "SECURITY_ALLOWED_DATASET_PATTERNS": "<SECURITY_ALLOWED_DATASET_PATTERNS>",
        "SECURITY_ALLOWED_USS_PATHS": "<SECURITY_ALLOWED_USS_PATHS>",
        "SECURITY_AUDIT_LOGGING": "<SECURITY_AUDIT_LOGGING>",
        "SECURITY_MAX_JCL_BYTES": "<SECURITY_MAX_JCL_BYTES>",
        "SECURITY_WRITE_APPROVAL": "<SECURITY_WRITE_APPROVAL>",
        "SECURITY_JCL_SCAN": "<SECURITY_JCL_SCAN>",
        "SECURITY_JCL_SCAN_STRICT": "<SECURITY_JCL_SCAN_STRICT>",
        "SECURITY_BLOCKED_PROGRAMS": "<SECURITY_BLOCKED_PROGRAMS>",
        "SECURITY_BLOCKED_JOB_CLASSES": "<SECURITY_BLOCKED_JOB_CLASSES>",
        "SECURITY_CHANGE_TICKET_PATTERN": "<SECURITY_CHANGE_TICKET_PATTERN>",
        "SECURITY_WRITE_WINDOW": "<SECURITY_WRITE_WINDOW>",
        "SECURITY_WRITE_DAYS": "<SECURITY_WRITE_DAYS>",
        "SECURITY_WRITE_WINDOW_TZ": "<SECURITY_WRITE_WINDOW_TZ>"
      }
    }
  }
}
~/.cursor/mcp.json
{
  "mcpServers": {
    "mainframe-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@notharshhaa/[email protected]"
      ],
      "env": {
        "ZOSMF_HOST": "<ZOSMF_HOST>",
        "ZOSMF_PORT": "<ZOSMF_PORT>",
        "ZOSMF_BASE_PATH": "<ZOSMF_BASE_PATH>",
        "ZOSMF_USER": "<ZOSMF_USER>",
        "ZOSMF_PASSWORD": "<ZOSMF_PASSWORD>",
        "ZOSMF_TOKEN": "<ZOSMF_TOKEN>",
        "ZOSMF_TOKEN_TYPE": "<ZOSMF_TOKEN_TYPE>",
        "ZOSMF_REJECT_UNAUTHORIZED": "<ZOSMF_REJECT_UNAUTHORIZED>",
        "ZOSMF_CERT": "<ZOSMF_CERT>",
        "ZOSMF_CERT_KEY": "<ZOSMF_CERT_KEY>",
        "ZOSMF_TOKEN_FILE": "<ZOSMF_TOKEN_FILE>",
        "ZOSMF_USER_ID": "<ZOSMF_USER_ID>",
        "ZOSMF_PASSTICKET_APP": "<ZOSMF_PASSTICKET_APP>",
        "ZOWE_TEAM_CONFIG": "<ZOWE_TEAM_CONFIG>",
        "ZOSMF_PROFILE": "<ZOSMF_PROFILE>",
        "LOG_LEVEL": "<LOG_LEVEL>",
        "MCP_TRANSPORT": "<MCP_TRANSPORT>",
        "MCP_SSE_PORT": "<MCP_SSE_PORT>",
        "MAX_JOB_OUTPUT_LINES": "<MAX_JOB_OUTPUT_LINES>",
        "MAX_DATASET_READ_LINES": "<MAX_DATASET_READ_LINES>",
        "MAX_JES_SPOOL_FILES": "<MAX_JES_SPOOL_FILES>",
        "MAX_AUDIT_LINES": "<MAX_AUDIT_LINES>",
        "CMCI_CONTEXT": "<CMCI_CONTEXT>",
        "CMCI_HOST": "<CMCI_HOST>",
        "CMCI_PORT": "<CMCI_PORT>",
        "CMCI_BASE_PATH": "<CMCI_BASE_PATH>",
        "DB2_LOCATION": "<DB2_LOCATION>",
        "DB2_HOST": "<DB2_HOST>",
        "DB2_PORT": "<DB2_PORT>",
        "DB2_BASE_PATH": "<DB2_BASE_PATH>",
        "SMF_SUMMARY_DATASET": "<SMF_SUMMARY_DATASET>",
        "RMF_METRICS_ENABLED": "<RMF_METRICS_ENABLED>",
        "RACF_AUDIT_USS_PATH": "<RACF_AUDIT_USS_PATH>",
        "RACF_AUDIT_DATASET": "<RACF_AUDIT_DATASET>",
        "SECURITY_READ_ONLY": "<SECURITY_READ_ONLY>",
        "SECURITY_ALLOWED_TOOLS": "<SECURITY_ALLOWED_TOOLS>",
        "SECURITY_BLOCKED_TOOLS": "<SECURITY_BLOCKED_TOOLS>",
        "SECURITY_ALLOWED_DATASET_PATTERNS": "<SECURITY_ALLOWED_DATASET_PATTERNS>",
        "SECURITY_ALLOWED_USS_PATHS": "<SECURITY_ALLOWED_USS_PATHS>",
        "SECURITY_AUDIT_LOGGING": "<SECURITY_AUDIT_LOGGING>",
        "SECURITY_MAX_JCL_BYTES": "<SECURITY_MAX_JCL_BYTES>",
        "SECURITY_WRITE_APPROVAL": "<SECURITY_WRITE_APPROVAL>",
        "SECURITY_JCL_SCAN": "<SECURITY_JCL_SCAN>",
        "SECURITY_JCL_SCAN_STRICT": "<SECURITY_JCL_SCAN_STRICT>",
        "SECURITY_BLOCKED_PROGRAMS": "<SECURITY_BLOCKED_PROGRAMS>",
        "SECURITY_BLOCKED_JOB_CLASSES": "<SECURITY_BLOCKED_JOB_CLASSES>",
        "SECURITY_CHANGE_TICKET_PATTERN": "<SECURITY_CHANGE_TICKET_PATTERN>",
        "SECURITY_WRITE_WINDOW": "<SECURITY_WRITE_WINDOW>",
        "SECURITY_WRITE_DAYS": "<SECURITY_WRITE_DAYS>",
        "SECURITY_WRITE_WINDOW_TZ": "<SECURITY_WRITE_WINDOW_TZ>"
      }
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "mainframe-mcp-server": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@notharshhaa/[email protected]"
      ],
      "env": {
        "ZOSMF_HOST": "<ZOSMF_HOST>",
        "ZOSMF_PORT": "<ZOSMF_PORT>",
        "ZOSMF_BASE_PATH": "<ZOSMF_BASE_PATH>",
        "ZOSMF_USER": "<ZOSMF_USER>",
        "ZOSMF_PASSWORD": "<ZOSMF_PASSWORD>",
        "ZOSMF_TOKEN": "<ZOSMF_TOKEN>",
        "ZOSMF_TOKEN_TYPE": "<ZOSMF_TOKEN_TYPE>",
        "ZOSMF_REJECT_UNAUTHORIZED": "<ZOSMF_REJECT_UNAUTHORIZED>",
        "ZOSMF_CERT": "<ZOSMF_CERT>",
        "ZOSMF_CERT_KEY": "<ZOSMF_CERT_KEY>",
        "ZOSMF_TOKEN_FILE": "<ZOSMF_TOKEN_FILE>",
        "ZOSMF_USER_ID": "<ZOSMF_USER_ID>",
        "ZOSMF_PASSTICKET_APP": "<ZOSMF_PASSTICKET_APP>",
        "ZOWE_TEAM_CONFIG": "<ZOWE_TEAM_CONFIG>",
        "ZOSMF_PROFILE": "<ZOSMF_PROFILE>",
        "LOG_LEVEL": "<LOG_LEVEL>",
        "MCP_TRANSPORT": "<MCP_TRANSPORT>",
        "MCP_SSE_PORT": "<MCP_SSE_PORT>",
        "MAX_JOB_OUTPUT_LINES": "<MAX_JOB_OUTPUT_LINES>",
        "MAX_DATASET_READ_LINES": "<MAX_DATASET_READ_LINES>",
        "MAX_JES_SPOOL_FILES": "<MAX_JES_SPOOL_FILES>",
        "MAX_AUDIT_LINES": "<MAX_AUDIT_LINES>",
        "CMCI_CONTEXT": "<CMCI_CONTEXT>",
        "CMCI_HOST": "<CMCI_HOST>",
        "CMCI_PORT": "<CMCI_PORT>",
        "CMCI_BASE_PATH": "<CMCI_BASE_PATH>",
        "DB2_LOCATION": "<DB2_LOCATION>",
        "DB2_HOST": "<DB2_HOST>",
        "DB2_PORT": "<DB2_PORT>",
        "DB2_BASE_PATH": "<DB2_BASE_PATH>",
        "SMF_SUMMARY_DATASET": "<SMF_SUMMARY_DATASET>",
        "RMF_METRICS_ENABLED": "<RMF_METRICS_ENABLED>",
        "RACF_AUDIT_USS_PATH": "<RACF_AUDIT_USS_PATH>",
        "RACF_AUDIT_DATASET": "<RACF_AUDIT_DATASET>",
        "SECURITY_READ_ONLY": "<SECURITY_READ_ONLY>",
        "SECURITY_ALLOWED_TOOLS": "<SECURITY_ALLOWED_TOOLS>",
        "SECURITY_BLOCKED_TOOLS": "<SECURITY_BLOCKED_TOOLS>",
        "SECURITY_ALLOWED_DATASET_PATTERNS": "<SECURITY_ALLOWED_DATASET_PATTERNS>",
        "SECURITY_ALLOWED_USS_PATHS": "<SECURITY_ALLOWED_USS_PATHS>",
        "SECURITY_AUDIT_LOGGING": "<SECURITY_AUDIT_LOGGING>",
        "SECURITY_MAX_JCL_BYTES": "<SECURITY_MAX_JCL_BYTES>",
        "SECURITY_WRITE_APPROVAL": "<SECURITY_WRITE_APPROVAL>",
        "SECURITY_JCL_SCAN": "<SECURITY_JCL_SCAN>",
        "SECURITY_JCL_SCAN_STRICT": "<SECURITY_JCL_SCAN_STRICT>",
        "SECURITY_BLOCKED_PROGRAMS": "<SECURITY_BLOCKED_PROGRAMS>",
        "SECURITY_BLOCKED_JOB_CLASSES": "<SECURITY_BLOCKED_JOB_CLASSES>",
        "SECURITY_CHANGE_TICKET_PATTERN": "<SECURITY_CHANGE_TICKET_PATTERN>",
        "SECURITY_WRITE_WINDOW": "<SECURITY_WRITE_WINDOW>",
        "SECURITY_WRITE_DAYS": "<SECURITY_WRITE_DAYS>",
        "SECURITY_WRITE_WINDOW_TZ": "<SECURITY_WRITE_WINDOW_TZ>"
      }
    }
  }
}

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools

This server runs locally, so its tools are listed by your MCP client once it starts.

Environment variables

NameDescription
ZOSMF_HOST
Required		z/OSMF hostname or IP address
ZOSMF_PORT
Optional		z/OSMF HTTPS port (default 443)
ZOSMF_BASE_PATH
Optional		Optional API gateway or mediation layer prefix for z/OSMF
ZOSMF_USER
Optional		z/OS user id (required with ZOSMF_PASSWORD unless ZOSMF_TOKEN is set)
ZOSMF_PASSWORD
Optional, secret		Password for basic auth (required with ZOSMF_USER unless ZOSMF_TOKEN is set)
ZOSMF_TOKEN
Optional, secret		Auth token (alternative to user/password)
ZOSMF_TOKEN_TYPE
Optional		Token type when using ZOSMF_TOKEN (e.g. LTPA2)
ZOSMF_REJECT_UNAUTHORIZED
Optional		Verify TLS certificates (true in production)
ZOSMF_CERT
Optional		PEM client certificate file path for mTLS auth
ZOSMF_CERT_KEY
Optional		PEM client key file path for mTLS auth (required with ZOSMF_CERT)
ZOSMF_TOKEN_FILE
Optional		Read ZOSMF_TOKEN from this file at startup (vault/agent injection)
ZOSMF_USER_ID
Optional		End-user id for PassTicket identity propagation (RACF sees this user, not the service account)
ZOSMF_PASSTICKET_APP
Optional		RACF PTKTDATA application name for PassTicket generation (default ZOSMF)
ZOWE_TEAM_CONFIG
Optional		Path to a zowe.config.json to import connection settings from (env vars win)
ZOSMF_PROFILE
Optional		Profile name inside the Zowe team config (defaults to defaults.zosmf)
LOG_LEVEL
Optional		Log level: fatal, error, warn, info, debug, trace, silent
MCP_TRANSPORT
Optional		Transport: stdio (IDE) or sse (legacy HTTP+SSE for container/network deployments)
MCP_SSE_PORT
Optional		Listen port when MCP_TRANSPORT=sse
MAX_JOB_OUTPUT_LINES
Optional		Max lines returned from a single spool DD
MAX_DATASET_READ_LINES
Optional		Max lines returned from dataset or USS reads
MAX_JES_SPOOL_FILES
Optional		Max spool files fetched during diagnostics
MAX_AUDIT_LINES
Optional		Max RACF audit log lines per query
CMCI_CONTEXT
Optional		CICSplex name or region APPLID (required for CICS tools)
CMCI_HOST
Optional		CMCI hostname (defaults to ZOSMF_HOST)
CMCI_PORT
Optional		CMCI HTTPS port (default 1490)
CMCI_BASE_PATH
Optional		CMCI REST base path
DB2_LOCATION
Optional		Db2 subsystem location name (required for Db2 tools)
DB2_HOST
Optional		Db2 REST hostname (defaults to ZOSMF_HOST)
DB2_PORT
Optional		Db2 REST port (default 50400)
DB2_BASE_PATH
Optional		Db2 REST base path
SMF_SUMMARY_DATASET
Optional		Optional SMF summary dataset for offline metrics
RMF_METRICS_ENABLED
Optional		Query z/OSMF RMF metrics when available
RACF_AUDIT_USS_PATH
Optional		USS path to RACF audit log file
RACF_AUDIT_DATASET
Optional		Sequential dataset containing RACF audit records
SECURITY_READ_ONLY
Optional		When true (default), blocks write tools such as submit_jcl
SECURITY_ALLOWED_TOOLS
Optional		Comma-separated allowlist of MCP tool names
SECURITY_BLOCKED_TOOLS
Optional		Comma-separated blocklist of MCP tool names
SECURITY_ALLOWED_DATASET_PATTERNS
Optional		Comma-separated dataset patterns (e.g. USERDEV.*,SYS1.*)
SECURITY_ALLOWED_USS_PATHS
Optional		Comma-separated USS path prefixes
SECURITY_AUDIT_LOGGING
Optional		Log every tool invocation to stderr (SIEM-friendly JSON)
SECURITY_MAX_JCL_BYTES
Optional		Maximum inline JCL size for submit_jcl
SECURITY_WRITE_APPROVAL
Optional		Human-in-the-loop: submit_jcl returns a one-time token and approve_write executes (default false)
SECURITY_JCL_SCAN
Optional		Pre-flight scan JCL before submission: IDCAMS DELETE, IEFBR14 DISP DELETE, blocked utilities (default true)
SECURITY_JCL_SCAN_STRICT
Optional		Strict scan mode: WARN findings also block submissions (default false)
SECURITY_BLOCKED_PROGRAMS
Optional		Comma-separated EXEC programs that may never run (extends ADRDSSU,ICKDSF,IEHINITT)
SECURITY_BLOCKED_JOB_CLASSES
Optional		Comma-separated JES job classes that may never be used
SECURITY_CHANGE_TICKET_PATTERN
Optional		Regex a changeTicket argument must match on writes, e.g. CHG[0-9]{6}
SECURITY_WRITE_WINDOW
Optional		Allowed write window, 24h HH:MM-HH:MM (overnight ranges allowed), e.g. 08:00-18:00
SECURITY_WRITE_DAYS
Optional		Weekdays writes are allowed: 0=Sun..6=Sat, e.g. 1-5
SECURITY_WRITE_WINDOW_TZ
Optional		IANA timezone for the write window (default UTC)

Details

Package@notharshhaa/[email protected] (NPM, stdio)
First published25 Oct 2026
Last updated25 Oct 2026
Registry nameio.github.NotHarshhaa/mainframe-mcp-server

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