io.github.NotHarshhaa/mainframe-mcp-server
Source repository no longer publicly accessible (HTTP 404). This may be deliberate: repositories are sometimes made private or relocated. Evidence.
MCP server for IBM z/OS jobs, datasets, USS, and operational diagnostics via Zowe SDK.
The current version, v2.5.0, was published to the official MCP registry on 2026-06-08. It is distributed as @notharshhaa/mainframe-mcp-server on npm, filed under Other by this index, and declares 34 environment variables. Removals and unreachable sources are measured across every server this index tracks, contract drift across the servers that answer in consecutive snapshots; the index's current counts put this record in context.
Using io.github.NotHarshhaa/mainframe-mcp-server in Claude, Cursor, Gemini CLI, Cline, or Zed?
MCP tool contracts can change remotely with no version bump. The mcpindex gate pins each contract and HOLDs the call when it drifts-before your agent acts. Zero credentials. This is not the package install for this server itself (use Install this server for that).
Rewrites your MCP host config so each server launches behind the gate. Inspect first: curl -fsSL https://mcpindex.ai/install.sh | less
uv tool install mcpindex-gate && mcpindex-config-wireSemantic screen found no manipulation pattern in the description. Conformance probe not yet run.
mcpindex.integrity.descriptionpassINFOevidence“No malicious instructions found”via static_description
- - Semantic screen only - the deterministic conformance probe has not run on this server
- - Confidence is reported but not yet calibrated (v1)
- - Screen reads the tool description, not the live behavior
- - advisory
- - registry description only no input schema
- - screen model 8b
- - Still current: the description we screened is unchanged, re-checked against the registry
Semantic screen: an LLM judge reads the tool description for hidden instructions (status PARTIAL). A pass means the description is not lying, not that the tool is safe: a high-capability tool with an honest description still warrants caution. The deterministic conformance probe has not been run on this server yet, so the screen here is semantic-only. Posture: advisory. Confidences are reported but not yet calibrated (calibrated=false at v1). Full verdict history is not shown on this page.
Own this server? Screen its description →
That verdict was true at screening time (snapshot 2026-09-02).
Contracts can change after screening, with no version bump. The gate pins io.github.NotHarshhaa/mainframe-mcp-server’s tool contracts on first sight and holds any silent change before your agent acts - the check that keeps being true on Tuesday.
See your first HOLD in 2 minutes →
Related: how to trust an MCP server · screen before install · silent contract drift
People vet a server before wiring it in. One line on your project site or docs answers that with an independent record: screening verdict, registry provenance, contract drift history. It stays current as new screens and drift events land.
[Independent trust record for io.github.NotHarshhaa/mainframe-mcp-server](https://mcpindex.ai/server/io-github-notharshhaa-mainframe-mcp-server) - screening verdict, registry provenance, and contract drift monitoring.<a href="https://mcpindex.ai/server/io-github-notharshhaa-mainframe-mcp-server">Independent trust record for io.github.NotHarshhaa/mainframe-mcp-server</a> - screening verdict, registry provenance, and contract drift monitoring.A live verdict badge for your README or listing. It reflects the current screen, links back here, and updates when the verdict does.
[](https://mcpindex.ai/server/io-github-notharshhaa-mainframe-mcp-server)<a href="https://mcpindex.ai/server/io-github-notharshhaa-mainframe-mcp-server"><img src="https://mcpindex.ai/api/v1/badge/io-github-notharshhaa-mainframe-mcp-server" alt="mcpindex verdict" height="20" /></a>ZOSMF_HOSTz/OSMF hostname or IP address
ZOSMF_PORTz/OSMF HTTPS port (default 443)
ZOSMF_BASE_PATHOptional API gateway or mediation layer prefix for z/OSMF
ZOSMF_USERz/OS user id (required with ZOSMF_PASSWORD unless ZOSMF_TOKEN is set)
ZOSMF_PASSWORDPassword for basic auth (required with ZOSMF_USER unless ZOSMF_TOKEN is set)
ZOSMF_TOKENAuth token (alternative to user/password)
ZOSMF_TOKEN_TYPEToken type when using ZOSMF_TOKEN (e.g. LTPA2)
ZOSMF_REJECT_UNAUTHORIZEDVerify TLS certificates (true in production)
LOG_LEVELLog level: fatal, error, warn, info, debug, trace, silent
MCP_TRANSPORTTransport: stdio (IDE) or sse (container/network)
MCP_SSE_PORTListen port when MCP_TRANSPORT=sse
MAX_JOB_OUTPUT_LINESMax lines returned from a single spool DD
MAX_DATASET_READ_LINESMax lines returned from dataset or USS reads
MAX_JES_SPOOL_FILESMax spool files fetched during diagnostics
MAX_AUDIT_LINESMax RACF audit log lines per query
CMCI_CONTEXTCICSplex name or region APPLID (required for CICS tools)
CMCI_HOSTCMCI hostname (defaults to ZOSMF_HOST)
CMCI_PORTCMCI HTTPS port (default 1490)
CMCI_BASE_PATHCMCI REST base path
DB2_LOCATIONDb2 subsystem location name (required for Db2 tools)
DB2_HOSTDb2 REST hostname (defaults to ZOSMF_HOST)
DB2_PORTDb2 REST port (default 50400)
DB2_BASE_PATHDb2 REST base path
SMF_SUMMARY_DATASETOptional SMF summary dataset for offline metrics
RMF_METRICS_ENABLEDQuery z/OSMF RMF metrics when available
RACF_AUDIT_USS_PATHUSS path to RACF audit log file
RACF_AUDIT_DATASETSequential dataset containing RACF audit records
SECURITY_READ_ONLYWhen true, blocks write tools such as submit_jcl
SECURITY_ALLOWED_TOOLSComma-separated allowlist of MCP tool names
SECURITY_BLOCKED_TOOLSComma-separated blocklist of MCP tool names
SECURITY_ALLOWED_DATASET_PATTERNSComma-separated dataset patterns (e.g. USERDEV.*,SYS1.*)
SECURITY_ALLOWED_USS_PATHSComma-separated USS path prefixes
SECURITY_AUDIT_LOGGINGLog every tool invocation to stderr (SIEM-friendly JSON)
SECURITY_MAX_JCL_BYTESMaximum inline JCL size for submit_jcl
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