Rubrkit MCP Server
https://www.rubrkit.com/api/v1/mcp
Remote
v0.1.0
Published by rubrkit.com — no publish provenance and no public repository, so the publisher could not be verified and the source cannot be independently located.
MCP-native AI evaluation: rubric audits, eval suites, and proof reports for AI/LLM output.
The grade answers one question — how safe is this server for you to adopt — so it is computed in two auditable stages. Nothing below is an opinion or an LLM's guess; every line is a real term the deterministic engine applied, and the same input always yields the same number.
1. Threat score — 100 − 0 = 100. What the published surface and source actually contain:
The deterministic scan raised no scored threat in the surface it inspected — the threat score stayed at 100. Capability observations and advisory notes are recorded but never lower it.
2. Client adoption risk — 100 − 10 = 90. Three small, subtract-only factors that reflect your risk in adopting it — a clean scan proves less on a powerful, unverified or barely-inspectable package, so the grade says so plainly:
| Points | Adoption-risk factor |
|---|---|
| −10 | capability blast radius (critical) — client exposure if the model is manipulated |
Capability observations and info notes are shown under Findings but never scored.
Open any row's finding below for the file, line and evidence behind a deduction.
Findings 3
critical Completed toxic-flow trifecta across toolsMTC-FLOW-002
This server (without client built-ins) exposes a complete data-exfiltration chain: rubrkit_read_proof_report → rubrkit_list_artifact_files → rubrkit_read_eval. Untrusted input is ingested, private data is read, and it can be sent to an external sink via the agent composing the tools (→). Static analysis proves the primitive exists, not that a specific run will occur.
Fix: Remove one leg of the trifecta: isolate untrusted-input tools from secret-reading tools and from egress tools, or require human approval between them.
Location: flow rubrkit_read_proof_report → rubrkit_list_artifact_files → rubrkit_read_eval
high Tool "rubrkit_read_eval" exposes command/code executionMTC-CAP-001
Tool "rubrkit_read_eval" appears to run shell commands or evaluate code (keyword "eval" in tool name). Arbitrary execution driven by model input is one of the most dangerous MCP capabilities; combined with any untrusted input it becomes RCE.
Fix: Sandbox execution, allowlist commands/arguments, and never pass model output to a shell unescaped.
Location: tool rubrkit_read_eval
low Mutating tool "rubrkit_read_eval" declares no destructiveHintMTC-CAP-005
Tool "rubrkit_read_eval" can mutate/egress but declares no destructiveHint. Clients that don't default to spec-safe behavior may not prompt before running it.
Fix: Declare accurate annotations, and gate destructive tools on user confirmation regardless.
Location: tool rubrkit_read_eval
Tools 41
Each tool and what it can reach — enumerated from the running server.
rubrkit_list_artifact_filesreads sensitive datarubrkit_read_evalruns code / shellrubrkit_read_proof_reportingests untrusted inputrubrkit_add_golden_caseno sensitive capabilityrubrkit_apply_audit_rewriteno sensitive capabilityrubrkit_convert_to_rubr_flowno sensitive capabilityrubrkit_create_artifact_bundleno sensitive capabilityrubrkit_create_drift_monitorno sensitive capabilityrubrkit_delete_artifact_bundleno sensitive capabilityrubrkit_export_proof_reportno sensitive capability
Show 31 more tools ↓
rubrkit_hard_delete_artifact_bundleno sensitive capabilityrubrkit_list_artifact_bundle_versionsno sensitive capabilityrubrkit_list_artifact_bundlesno sensitive capabilityrubrkit_list_auditsno sensitive capabilityrubrkit_list_drift_monitorsno sensitive capabilityrubrkit_list_evalsno sensitive capabilityrubrkit_list_file_versionsno sensitive capabilityrubrkit_list_golden_casesno sensitive capabilityrubrkit_list_job_eventsno sensitive capabilityrubrkit_list_rubr_flow_conversionsno sensitive capabilityrubrkit_poll_jobno sensitive capabilityrubrkit_read_api_docno sensitive capabilityrubrkit_read_artifact_bundleno sensitive capabilityrubrkit_read_artifact_fileno sensitive capabilityrubrkit_read_auditno sensitive capabilityrubrkit_read_drift_observationsno sensitive capabilityrubrkit_read_input_driftno sensitive capabilityrubrkit_read_openapi_contractno sensitive capabilityrubrkit_read_rubr_flow_conversionno sensitive capabilityrubrkit_read_validity_driftno sensitive capabilityrubrkit_record_outcomeno sensitive capabilityrubrkit_restore_artifact_bundle_versionno sensitive capabilityrubrkit_restore_file_versionno sensitive capabilityrubrkit_retire_golden_caseno sensitive capabilityrubrkit_run_drift_checkno sensitive capabilityrubrkit_run_evalsno sensitive capabilityrubrkit_search_api_docsno sensitive capabilityrubrkit_set_drift_monitor_statusno sensitive capabilityrubrkit_start_auditno sensitive capabilityrubrkit_update_artifact_fileno sensitive capabilityrubrkit_upload_artifact_filesno sensitive capability
Toxic flows 1
Cross-tool combinations that form a data-exfiltration primitive (untrusted input → sensitive source → external sink).
Versions 1
Scan history per published version. The engine is deterministic — the same version always yields the same score, so a changed score means the package itself changed.
| Version | Score | Findings | Engine | Scanned |
|---|---|---|---|---|
v0.1.0 latest |
A 90/100 | 3 | 1.10.0 | 2026-07-24 |
Embed this score
Show this server's live Trust Score in your README, docs or website. The badge is served straight from the registry and updates automatically after every rescan — no API key needed. It links back to this page, so anyone who sees the grade can also read the findings behind it instead of taking a number on faith.
Verify this score yourself
The score above is reproducible: the same package version always yields the same result. Run it locally or over the free API — no account, no LLM, fully deterministic.
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