# mcp-cucm-axl

Read-only MCP server for **Cisco Unified CM 15** AXL — built for LLM-driven
cluster auditing, with a particular focus on the **Route Plan Report**:
partitions, calling search spaces, route patterns, translation patterns,
called/calling party transformations, and digit-discard instructions.

## Why this exists

CUCM's admin UI is great for one-config-at-a-time work but painful for
audit/discovery questions like:

- "Which translation patterns rewrite the calling party number, and why?"
- "Which CSSs include the `Internal_PT` partition, in what order?"
- "Show me every route pattern targeting the SIP trunk to the carrier."
- "Are there partitions defined but unreachable from any CSS?"

This server gives an LLM SQL access to CUCM's Informix data dictionary,
plus focused tools that bake in the right joins for routing-audit work.
Pair it with the sibling [`mcp-cisco-docs`](../docs/) server and the LLM
gets vendor documentation alongside live cluster state — answering
"is our config consistent with Cisco's recommended baseline?" in a single
conversation.

## Read-only by structural guarantee

The server **never registers** AXL write methods. There is no
`executeSQLUpdate`, no `add*`/`update*`/`remove*`/`apply*`/`reset*`/
`restart*` tool. Read-only is enforced by *absence* of write operations,
not by runtime sanitization. Defense-in-depth: SQL queries are also
client-side validated to begin with `SELECT` or `WITH`.

## Setup

### 1. Configure environment

Edit `.env` (already gitignored):

```env
AXL_URL=https://cucm-pub:8443/axl
AXL_USER=AxlUser
AXL_PASS=...
AXL_VERIFY_TLS=false        # CUCM ships self-signed certs; default off
AXL_CACHE_TTL=3600          # 1 hour; 0 disables caching
AXL_WSDL_PATH=              # optional explicit WSDL location
CISCO_DOCS_INDEX_PATH=      # optional override for prompt enrichment
```

### 2. Bootstrap the AXL WSDL

Download the **Cisco AXL Toolkit** from your CUCM admin UI:

> Application → Plugins → Find → "Cisco AXL Toolkit" → Download

Drop the resulting `axlsqltoolkit.zip` into the project directory. On first
launch, the server auto-extracts `schema/15.0/` into `~/.cache/mcp-cucm-axl/wsdl/15.0/`.
The zip is gitignored (Cisco-licensed; not redistributable).

Alternatives (in resolution order):

```bash
# A: explicit zip elsewhere
export AXL_WSDL_ZIP=/path/to/axlsqltoolkit.zip

# B: explicit WSDL file
export AXL_WSDL_PATH=/path/to/schema/15.0/AXLAPI.wsdl

# C: pre-populated cache directory
mkdir -p ~/.cache/mcp-cucm-axl/wsdl/15.0/
cp /path/to/schema/15.0/* ~/.cache/mcp-cucm-axl/wsdl/15.0/
```

### 3. Install + run

```bash
uv sync
uv run mcp-cucm-axl
```

Or via the bundled `.mcp.json`, automatically registered when Claude Code
opens this directory.

## Tool surface

### Foundational

| Tool | Purpose |
|---|---|
| `axl_version()` | Cluster version sanity check |
| `axl_sql(query)` | Execute a SELECT against Informix data dictionary |
| `axl_list_tables(pattern=None)` | Discover Informix tables |
| `axl_describe_table(name)` | Column metadata for one table |
| `cache_stats()`, `cache_clear(pattern=None)` | Cache plumbing |

### Route plan

| Tool | Purpose |
|---|---|
| `route_partitions()` | All partitions with pattern + CSS-member counts |
| `route_calling_search_spaces(name=None)` | CSS list with ordered partitions |
| `route_patterns(kind=None, partition=None, filter=None)` | Route Plan Report — patterns + transformations |
| `route_inspect_pattern(pattern, partition=None)` | Deep dive: transforms, route filter, reachable-from CSS, full destination chain (route list → groups → gateways) |
| `route_lists_and_groups(name=None)` | Route list → route group → gateway chain (annotates Local Route Group placeholders) |
| `route_translation_chain(number, css_name=None)` | Wildcard-aware pattern matcher: evaluates X / ! / [0-9] / @ / \\+ against the number and returns matches sorted by specificity |
| `route_digit_discard_instructions()` | DDI catalog |
| `route_device_pool_route_groups(device_pool_name=None)` | How each device pool resolves Local Route Group placeholders to actual gateway-bearing groups |
| `route_devices_using_css(css_name)` | Impact analysis: every reference to a CSS across line CFA/CFB/CFNA/CFUR/translation/MWI/shared, device-level CSSs, voicemail pilots, route lists |
| `route_filters(name=None)` | Route filter clauses + member rules (composed with @-pattern routes) |

## Prompts

Schema-grounded conversation seeds. They pull relevant chunks from the
sibling `cisco-docs` index and embed them inline:

- `route_plan_overview` — fresh audit conversation seed
- `investigate_pattern(pattern, partition=None)` — deep-dive a specific pattern
- `audit_routing(focus="full")` — comprehensive audit walkthrough
- `cucm_sql_help(question)` — catch-all for arbitrary SQL questions

## Cache

Responses are cached in SQLite at `~/.cache/mcp-cucm-axl/responses/axl_responses.sqlite`.
Cache survives restarts. Clear with `cache_clear()` after a known config change.

## Notes

- `route_translation_chain` does literal/prefix matching only. CUCM's actual
  matcher evaluates wildcards (`X`, `!`, `[0-9]`, etc.) and selects the
  longest match. Treat results as "patterns to investigate" rather than
  "definitive route."
- Pattern type codes (`tkpatternusage`) used by `route_patterns(kind=...)` are
  stable across CUCM versions but enumerated against the `typepatternusage`
  table at query time, so any cluster-specific custom types still work.