callsign
Callsign is the real-world information source for AI agents. One MCP server over 250+ curated live and historical data streams — weather, markets, economy, code, security, sports — searchable, queryable by time, and subscribable by webhook or pull.
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https://callsign.sh/https://api.callsign.sh/mcpThis server may ask you to sign in when your AI client connects.
Last probed Nov 3, 2026 · api.callsign.sh
callsign — real-world information for AI agents requires sign-in before tools can be listed. Connect the MCP server to inspect the live tool list in your client.
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A working endpoint is step one. Directory coverage is the coordinated launch across ChatGPT, Claude, Cursor, the MCP Registry, and community indexes.
Directory coverage for brandsCallsign is the real-world information source for AI agents. One MCP server over 250+ curated live and historical data streams — weather, markets, economy, code, security, sports — searchable, queryable by time, and subscribable by webhook or pull.
Use the remote MCP URL on this page in your MCP client (Claude, Cursor, VS Code, and more). Copy the endpoint if your client needs a manual entry, then complete provider sign-in when your client connects — tools appear after authentication.
This endpoint requires provider sign-in, so MCPBundles could not list tools anonymously during the last probe. After you connect and authenticate in your MCP client, your session should receive the live tool list from the provider.
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callsign — real-world information for AI agents may require signing in to the provider before tools can run. Connect through MCPBundles or your MCP client and complete any provider login when prompted.
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