"Signal" matching MCP servers:

Enables querying of U.S. congressional stock trade data, including price history, recent trades, buy signals, stock activity, and politician activity, through natural language tools.

Search, verify and screen over 1 million African companies across 18 official government registries, along with the public contracts they have won and OFAC/UN sanctions screening. Every result carries its registry source, date and a confidence signal, and the server returns nulls rather than fabricating data.

Enables radio hobbyists to explore likely services, channels, and signal types across the radio spectrum from 108 MHz to 1 GHz via classification, channel queries, service search, read-only SQL, and local reference-model queries.

GovAuctions.app is a free public site for searching government surplus auctions. This MCP server exposes its data: live listings from GSA and other public sellers across the US, UK, CA and AU, sold-price comps from 170,000+ closed auctions, and a 0-100 Flip Score resale signal.

The most comprehensive signal intelligence on Swiss businesses — 800K+ companies with people, FINMA/SRO regulatory data, building permits, procurement tenders, and AI-enriched profiles from the official commercial register.

Enables search and discourse analysis over Xi Jinping's publicly available speeches and official statements, including full-text retrieval, phrase-trend tracking, and verbatim quotes with source-linked citations.