Signalfeed MCP Server

signalfeed

Twelve US filing-event streams, one schema, one key. signalfeed is a small client for the DataSignals Events API, which parses official filings into scored, decision-ready event records: insider buying clusters, planned insider sales (Form 144), activist stakes (13D/G), institutional holdings (13F), material events (8-K), private raises (Form D), FDA actions, biotech trial catalysts, NIH grants, federal contract awards, congressional trades and hiring signals. Every record links back to the filing it was parsed from, and where a record carries a score it also carries the terms that score was built from.

The feed is cursor-based: pass the cursor from one response back as since and you get exactly what arrived since — no duplicates, no gaps. Responses come back exactly as the API returned them: nothing is trimmed, renamed or summarised on the way through.

Configuration

• DATASIGNALS_KEY — your API key. Required for the keyed tools; sent on those requests as Authorization: Bearer <key> and never as a query parameter, so it does not end up in server logs or browser history. The keyless tools never send it.
• DATASIGNALS_BASE_URL (optional) — API base URL. Defaults to https://datasignalslab.com.

A keyed tool called without a key fails locally with DATASIGNALS_KEY is not set, before any request is made. Two tools — list_event_types and feed_health — work without a key, so you can see the shape of the data and how fresh it is before you decide.

Tools

• search_events — search filing events across all twelve streams. All filters are optional: event_type (one of the twelve stream ids), ticker, cik, min_score, plus since (the cursor from a previous response) and limit for paging. Only the filters you set are sent.
• company_events — everything filed on one company, across all streams. company is a ticker or a CIK; since and limit page the result.
• get_event — show everything on one event, by its event_id (for example insider_cluster:CAMP:2026-08-03).
• list_event_types — which fields each stream carries, and whether its score can be recomputed. Works without a key.
• feed_health — how current each stream is right now. Works without a key.
• usage — how much of the monthly event allowance is used, and when it resets.
• check_setup — whether the API key is configured and whether the feed answers. Always answers with a JSON object {key_configured, feed_reachable, detail}; the key value is never printed and no key is sent by the check itself.

Behaviour worth knowing:

• A quota-exhausted feed does not throw an error mid-sync: it answers a 200 empty page with your cursor intact and a plain notice, and signalfeed passes it through like any other page.
• The API scales to zero when idle. The first request after a quiet period may get a starting_up answer (with a Retry-After header) while it wakes, which can take about fifteen seconds; signalfeed returns that body as a normal result rather than an error, and the call is not counted against your allowance. Just call again.
• Any other non-2xx reply fails with datasignals error: HTTP <status>, and an unreachable API with datasignals unreachable.

Endpoint provenance

The vendor's Events API page pins the endpoints, the filter names, the cursor model and the twelve stream ids; the original MCP project's README pins the seven tools, both environment variables, the Bearer-header auth rule and the two keyless tools. The MCP-layer argument names follow the documented API names (a labelled reconstruction, since the MCP layer itself is unpublished):

• GET <base>/v1/events with only the set filters as query parameters (used by search_events).
• GET <base>/v1/companies/{ticker or cik}/events with since/limit when set (used by company_events).
• GET <base>/v1/events/{event_id} (used by get_event).
• GET <base>/v1/event-types (used by list_event_types, keyless).
• GET <base>/v1/health (used by feed_health, keyless, and by check_setup).
• GET <base>/v1/usage (used by usage).

event_id and company path segments are URL-encoded.

CLI

Each tool is a subcommand taking one JSON argument string:

npx @reneturcios/signalfeed search_events '{"event_type":"fda_action","min_score":70}'
npx @reneturcios/signalfeed company_events '{"company":"NVDA"}'
npx @reneturcios/signalfeed get_event '{"event_id":"insider_cluster:CAMP:2026-08-03"}'
npx @reneturcios/signalfeed list_event_types '{}'
npx @reneturcios/signalfeed feed_health '{}'
npx @reneturcios/signalfeed usage '{}'
npx @reneturcios/signalfeed check_setup '{}'
npx @reneturcios/signalfeed --version

Output is the tool's result text (the upstream body on success). Exit codes: 0 on success, 1 on a runtime error, 2 on a usage error.

MCP server

npx -y @reneturcios/signalfeed mcp

MCP client config:

{
  "mcpServers": {
    "signalfeed": {
      "command": "npx",
      "args": ["-y", "@reneturcios/signalfeed", "mcp"],
      "env": {
        "DATASIGNALS_KEY": "<your key>"
      }
    }
  }
}

Docker

docker run -i ghcr.io/cloudcorprecords/signalfeed
docker run --rm ghcr.io/cloudcorprecords/signalfeed feed_health '{}'

Development

npm install
npm run build   # tsc -> dist/
npm test        # tsx --test test/*.test.ts (fake fetch only, no network)
npm run dev     # run the CLI from source

License

MIT — Copyright (c) 2026 Rene Turcios