rsi-search-pro-mcp

One MCP, all the web-research firepower. A transparent meta-MCP that proxies two upstream Cloud Run services:

Upstream	Surface
authority-web-search-mcp	12 tools — Tavily authoritative search, structured fetch, PDF discovery + fetch, AJAX form POST, sitemap walk, Indian-context default routing
browser-research-mcp	3 tools — visit / extract / act via real Chromium + Sonnet vision

The aggregator does no work at build time — it discovers each upstream's tools/list at request time and routes tools/call by name. Updates to either upstream propagate within one TTL window (~5 min); this service only needs to redeploy when the routing logic itself changes.

Fetch ladder

The aggregator's instructions tell the agent to follow a strict cost ladder:

web_search_authoritative → web_fetch_structured → pdf_fetch_structured →
http_post_form → (last resort) visit / extract / act

The browser tools are 5-15× slower than the PDF/AJAX path; using them when the cheap rungs would have worked just burns Chromium-CPU on Cloud Run.

Run locally

uv tool install rsi-search-pro-mcp --python 3.12

# stdio (Claude Desktop, Cursor, …)
uvx rsi-search-pro

# streamable-http (your own backend)
uvx rsi-search-pro --transport streamable-http --port 7863

Environment

Var	Default	Purpose
AUTHORITY_WEB_SEARCH_URL	the prod Cloud Run URL	Override per environment
BROWSER_RESEARCH_URL	the prod Cloud Run URL	Override per environment
MCP_TRANSPORT	stdio	stdio / sse / streamable-http
MCP_HOST / PORT	0.0.0.0 / 7863	Bind for the HTTP transports
ALLOWED_HOSTS	(unset → DNS-rebinding disabled)	Comma-separated allowlist
FORWARDED_ALLOW_IPS	* (in Dockerfile)	Trust proxy headers

Architecture

┌─────────────────────────────────────────────────────────┐
│                  Agent (your backend)                    │
│                          │                               │
│                          │  POST /mcp                    │
│                          ▼                               │
│      ┌──────────────────────────────────────────┐        │
│      │   rsi-search-pro-mcp (Cloud Run)          │        │
│      │                                            │        │
│      │   tools/list  →  merge from upstreams      │        │
│      │   tools/call  →  route to upstream by name │        │
│      │                                            │        │
│      │   5-min catalog TTL                        │        │
│      └────────────┬────────────────────┬──────────┘        │
│                   │                    │                   │
│        ┌──────────▼──────┐   ┌────────▼────────────┐       │
│        │ authority-web-  │   │ browser-research-   │       │
│        │ search-mcp      │   │ mcp                 │       │
│        │ (Cloud Run)     │   │ (Cloud Run)         │       │
│        └─────────────────┘   └─────────────────────┘       │
└─────────────────────────────────────────────────────────┘

License

Apache-2.0.