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feat: Rapid7 parity + MCP-spec modernization (v3.1.0) - #20

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setuidloot merged 9 commits into
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feat/parity-phase1-db-intel
Jul 31, 2026
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feat: Rapid7 parity + MCP-spec modernization (v3.1.0)#20
setuidloot merged 9 commits into
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feat/parity-phase1-db-intel

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Implements the full official-parity-and-mcp-modernization OpenSpec change end-to-end, validated against a real Metasploit instance.

New capabilities

Parity with the official Rapid7 MCP

  • Workspace DB intelligence (read-only): list_hosts, list_services, list_vulnerabilities, list_notes, list_credentials, list_loot — workspace-scoped, degrade to a structured database_unavailable error when no DB is attached.
  • check_vulnerability — runs a module's non-destructive check only (never exploits / delivers a payload / opens a session); structured vulnerable|safe|unsupported|unknown state.
  • get_module_results — retrieve status/output of an async run by UUID.

Safety (default-safe posture)

  • Destructive tools (exploit/module execution, payload gen, session control, listeners/jobs) are disabled by default; enable with --allow-dangerous / MSF_MCP_ALLOW_DANGEROUS.
  • Configurable rate limiting (--rate-limit / MSF_MCP_RATE_LIMIT).
  • health_check reports database_connected and the safety posture.

MCP protocol modernization

  • Tool annotations (readOnly/destructive/idempotent/openWorld) on all 24 tools, from one taxonomy shared with the safety gate.
  • Structured output verified (schema + structuredContent, text fallback preserved).
  • Resources: msf://server/info, msf://module/{module}.
  • Elicitation (opt-in --confirm-dangerous) with gate fallback.
  • FastMCP 3.x cap evaluated: kept <3.4.0 (3.4.x fails to import; 3.3.x used & verified). Rationale documented at the pin.

Real-Metasploit validation

Ran against a live msfrpcd + database. Verified: health_check (db connected, safety posture), list_exploits, a real run_auxiliary_module port scan whose results flowed into list_services, all six DB-intel tools, check_vulnerability (real check → structured state, no session), generate_payload (real msfvenom ELF), the safety gate (blocks when off, read-only still works), and the msf://server/info resource.

This caught a genuine bug: pymetasploit3's module .check is a bool, not a method — fixed to use the module.check RPC (fix(check) commit).

Docs & packaging

  • New docs/MCP_API.md: full tool/resource reference, safety model, MCP specification conformance, and official-MCP comparison. (Renders on GitHub; GitHub Pages notes included.)
  • README: PyPI-first install (pip install metasploit-mcp), source as the dev path; documented safety posture; Claude Desktop config updated.
  • v3.1.0 across pyproject/server.json/__version__ (fixes a 3.0.0 drift); CHANGELOG + SBOM updated.

Verification

  • 431 passed, 39 skipped (full suite) on fastmcp 3.3.1; black, sbom --check clean.
  • New unit tests: test_db_intel, test_check_and_results, test_safety_controls, test_annotations, test_structured_output, test_resources_and_elicitation.

Follow-ups (tracked)

  • get_module_results for an unknown UUID returns running on real MSF (it doesn't distinguish unknown from pending); the not-found path covers empty responses.
  • Flip mypy from advisory to blocking once the pre-existing backlog is cleared.

🤖 Generated with Claude Code

setuidloot and others added 9 commits July 31, 2026 13:03
Phase 1 of official-parity-and-mcp-modernization. Adds six read-only workspace
DB tools mirroring the official Rapid7 MCP: list_hosts, list_services,
list_vulnerabilities, list_notes, list_credentials, list_loot. Backed by a
shared _db_intel() helper (workspace scoping, msgpack byte normalization via
_decode_rpc, and a _db_connected probe) that returns a structured
"database_unavailable" error instead of raising when no DB is attached.
health_check now reports database_connected. Adds tests/test_db_intel.py.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
…ety gate

Phase 1 completion + Phase 2 of official-parity-and-mcp-modernization:

- check_vulnerability: runs a module's non-destructive `check` only (never fires
  the exploit / delivers a payload / opens a session), mapping the result to a
  structured state (vulnerable / safe / unsupported / unknown).
- get_module_results: retrieves status + output for an async execution by uuid,
  with a structured not-found error for unknown ids.
- Safety controls: state-changing tools (run_exploit, run_auxiliary_module,
  run_post_module, generate_payload, send_session_command, terminate_session,
  start_listener, stop_job, kill_all_handler_jobs) are gated behind a default-off
  dangerous-actions flag (--allow-dangerous / MSF_MCP_ALLOW_DANGEROUS) plus a
  configurable rate limiter (--rate-limit / MSF_MCP_RATE_LIMIT). health_check now
  reports the safety posture. Tests enable dangerous actions via conftest.

Adds tests/test_check_and_results.py and tests/test_safety_controls.py.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Phase 3 (annotations) of official-parity-and-mcp-modernization. Introduces a
single TOOL_ANNOTATIONS taxonomy and an annotated_tool decorator so every tool
advertises MCP hints (readOnlyHint / destructiveHint / idempotentHint /
openWorldHint). The destructive set is the authoritative classification shared
with the @dangerous_tool safety gate. Adds tests/test_annotations.py.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
… confirm

Phase 3 (groups 6-7) of official-parity-and-mcp-modernization:

- Structured output: FastMCP already emits an output schema + structured content
  for the Dict-returning tools while preserving the text representation; locked
  in with tests/test_structured_output.py.
- Resources: msf://server/info (identity, safety posture, tool taxonomy) and a
  msf://module/{module} documentation template.
- Elicitation: optional confirmation (--confirm-dangerous / MSF_MCP_CONFIRM_DANGEROUS)
  for destructive tools via ctx.elicit, with a gate fallback when the client
  cannot elicit; decline yields a structured cancelled result.

Adds tests/test_resources_and_elicitation.py.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
…kage)

Phase 4 of official-parity-and-mcp-modernization. Attempted lifting the cap to
allow 3.4.x: fastmcp 3.4.5 fails to import ("cannot import name 'FastMCP' from
'fastmcp'") even after a clean reinstall, so the <3.4.0 cap is retained and the
rationale documented at the pin. Within the cap the resolver now uses fastmcp
3.3.1 (annotations, structured output, and elicitation all verified; full suite
green). Regenerates poetry.lock and sbom.json.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
… a method)

Live validation against a real msfrpcd surfaced 'bool object is not callable':
on pymetasploit3 module objects, `.check` is a boolean indicating whether the
module implements a check (not the method). Fix check_vulnerability to short
-circuit unsupported modules via that flag and invoke the check through the
module.check RPC (moduletype, modulename, options). Updated unit tests to model
the real API. Verified end-to-end against msfrpcd (returns a structured
check_state with no session created).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
…rsion bump

- Add docs/MCP_API.md: full tool/resource reference, safety model, MCP spec
  conformance, and a comparison with the official Rapid7 MCP.
- README: install via PyPI first (pip install metasploit-mcp) with source as the
  dev alternative; document the default-off safety posture and --allow-dangerous;
  add the new tools and MCP-protocol features; update the Claude Desktop config.
- Bump version to 3.1.0 across pyproject, server.json, and the in-package
  __version__ (fixing a 3.0.0 drift); add the 3.1.0 CHANGELOG section; regen SBOM.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
…archive change

Reverse the safety posture: this is an offensive-security tool whose full toolset
has always been available, so defaulting dangerous actions to OFF would regress
existing users. Dangerous tools are now ENABLED by default; harden a deployment
with --safe-mode (or MSF_MCP_ALLOW_DANGEROUS=false) for read-only tools, and the
rate limit is OFF by default (opt in via --rate-limit). This intentionally
inverts the official Rapid7 server's default-off posture.

- server.py: default DANGEROUS_ACTIONS_ENABLED=True, RATE_LIMIT_PER_MIN=0; gate
  message now references safe mode.
- __init__.py: add --safe-mode; --allow-dangerous retained (now the default).
- Update spec, README, docs/MCP_API.md, and CHANGELOG to the enabled-by-default
  posture; add default-posture tests.
- Archive the completed official-parity-and-mcp-modernization OpenSpec change;
  sync its 5 capability specs into openspec/specs/.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
@setuidloot
setuidloot merged commit 5e41ab3 into main Jul 31, 2026
7 checks passed
@setuidloot
setuidloot deleted the feat/parity-phase1-db-intel branch July 31, 2026 18:18
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