catalyst-sdwan-super-mcp 0.4.1

FastMCP server for the Cisco Catalyst SD-WAN Manager (vManage) API, generated dynamically from the official OpenAPI specs.

catalyst-sdwan-super-mcp

A FastMCP server that exposes the Cisco Catalyst SD-WAN Manager (vManage) REST API as MCP tools, so any MCP-compatible LLM client (Claude Desktop, Claude Code, Cursor, …) can query and manage your SD-WAN overlay.

Tools are generated dynamically from the official OpenAPI specs — drop in a new spec, the tools rebuild themselves. No per-version Python.

Documentation: https://thomaschristory.github.io/catalyst-sdwan-super-mcp/

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Try it in 60 seconds against the Cisco DevNet sandbox

git clone https://github.com/thomaschristory/catalyst-sdwan-super-mcp.git
cd catalyst-sdwan-super-mcp
uv sync

# Credentials for Cisco's public always-on SD-WAN sandbox
cat > .env <<'EOF'
VMANAGE_USERNAME=devnetuser
VMANAGE_PASSWORD=RG!_Yw919_83
EOF

uv run sdwan-mcp        # stdio, read-only, adaptive tool splitting (default)

The shipped sdwan-mcp.yaml points at sandbox-sdwan-2.cisco.com and ships specs for vManage 20.15, 20.16, and 20.18 in specs/. 20.18 is the default. You don't need a vManage of your own to try it.

Supported vManage versions: 20.15+. Older releases are out of scope — see issue #13.

Install from PyPI

uv tool install catalyst-sdwan-super-mcp
sdwan-mcp --help

The PyPI package ships the server only — no bundled specs. On first run the loader auto-fetches the spec for sdwan.active_version from developer.cisco.com and writes it under sdwan.specs_dir (set sdwan.auto_fetch: false to opt out, e.g. for air-gapped deployments). For predictable behaviour you can pre-warm with sdwan-mcp fetch --version 20.18. Full instructions: docs/getting-started/install.md.

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What you get

• Adaptive tool splitting. A size-driven splitter (max_actions_per_tool, default 150) chops huge OpenAPI sections into right-sized tools — 360 tools on 20.18 RW out of the box, all under the cap. See docs/guides/tool-splitting.md.
• Read-only by default. --read-write registers POST/PUT/DELETE/PATCH explicitly.
• Two auth modes to vManage: JWT (vManage 20.18.1+) and JSESSIONID + XSRF (older).
• Three transports: stdio, SSE, streamable-HTTP. The HTTP transports ship with first-class bearer-token auth (transport.auth.type: bearer) and auto-demote non-loopback binds to 127.0.0.1 when no auth is configured. See docs/guides/mcp-clients.md.
• Response pagination for bulk endpoints. The dispatcher auto-follows scroll and offset endpoints up to a configurable cap and returns a stitched payload with a resumable cursor. See docs/guides/pagination.md.
• Configurable retry + timeout on the httpx client. Transient 5xx and connection errors retry with exponential backoff + jitter; mutating verbs are skipped by default. See docs/reference/configuration.md.
• Auto-fetch specs. Bump sdwan.active_version and the loader pulls the matching spec from developer.cisco.com on startup. Pre-warm explicitly with sdwan-mcp fetch --version <V> or list known versions with sdwan-mcp list-versions. See docs/guides/spec-versions.md.
• Version diff: sdwan-mcp --diff 20.15 20.18 shows added/removed/changed operations before upgrade.
• Docker: multi-stage image, specs mounted as a volume so versions ship without rebuilding.

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Project layout

sdwan_mcp/          source package
  server.py         entrypoint, CLI, subcommands (fetch, list-versions)
  config.py         YAML + env interpolation
  loader.py         spec loading, adaptive splitting, indexing
  auth.py           JWT + session login to vManage
  transport_auth.py bearer-token middleware for SSE / streamable-HTTP
  dispatcher.py     httpx client, retry + timeout, param routing
  pagination.py     scroll + offset auto-follow
  fetcher/          live spec ingestion from developer.cisco.com (20.16+)
  tools.py          dynamic MCP tool registration
  diff.py           version diff utility
tests/              pytest suite (respx for HTTP)
docs/               mkdocs-material site, deployed to GitHub Pages
specs/{version}/    OpenAPI YAML/JSON, one folder per vManage version
.github/workflows/  lint, test, docker, docs, release

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Architecture quick look

See docs/architecture/overview.md. At a glance:

LLM ──(MCP)──► FastMCP ──► tools.py ──► dispatcher.py ──► httpx ──► vManage
                  ▲                           │
                  │           auth.py ◄───────┘
              loader.py
                  ▲
              specs/{version}/*.{yaml,json}

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Status

Pre-1.0. Read-only is the safe default and the recommended starting posture; --read-write opt-in is exercised against the DevNet sandbox. Released versions are tagged on PyPI and tracked in CHANGELOG.md. Open work is on the issue tracker.

License: Apache 2.0.