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Signal Lab: free data for trading and AI agents MCP Server

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not responding

Signal Lab: free data for trading and AI agents is listed as active in the registry but did not answer our last check. It exposes 8 tools.

Search and export free market, macro, weather, news and OSINT data sources, with terms and skills.

Uptime history 4 days of history · worst day 3%
4 days agonow
3.3%
Uptime 24h
3 of 91 checks
8
Tools
read from the server
1554 ms
Response time
average over 24h
open, no key
Access
streamable-http

What changed 2

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 30 October 2026. No other catalogue keeps this.

30 Oct a tool description was rewritten get_ingestion_skill
30 Oct a tool changed version

Signal Lab: free data for trading and AI agents does not always answer

Over the last week it answered 18.8% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 7 min ago.

run in your terminal
claude mcp add signal-lab --transport http https://signal-lab-jet.vercel.app/api/mcp
Settings → Connectors → Add custom connector, then paste this address
https://signal-lab-jet.vercel.app/api/mcp
~/.codex/config.toml
[mcp_servers.signal-lab]
url = "https://signal-lab-jet.vercel.app/api/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "signal-lab": {
      "url": "https://signal-lab-jet.vercel.app/api/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "signal-lab": {
      "type": "http",
      "url": "https://signal-lab-jet.vercel.app/api/mcp"
    }
  }
}

Available tools 8

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

catalog
catalog_info
Return the catalog's notice, schemaVersion, generated time, entry count and the download URLs of the full catalog as JSON and CSV.
search_catalog
Find free and free-to-start financial data sources, tools and models in the Signal Lab catalog by text and by filters (category, type, access badge, sign-up needed, license, task, verified, verified_since; see list_filters for the values). Returns up to 25 summary rows in name order, each with lastVerified and sitePageUrl. Use get_entry for every field of one entry, export_catalog for the whole list, get_source_urls for provider and terms links.
compare
compare_entries
Place the catalog's fields for up to 5 entries side by side. Values are the catalog's own; a field the catalog does not have shows Not in catalog.
entry
get_entry
Return one catalog entry by slug, with every field the catalog has for it (limits, coverage, auth, license, licenseNote, source URLs, lastVerified). Get slugs from search_catalog.
export
export_catalog
Export the Signal Lab catalog as JSON or CSV: every entry, or only those matching the same filters as search_catalog (no result cap). Optional fields picks columns by catalog field name. CSV has a header row, joins lists with "; " and repeats the catalog notice in the last column. Also returns the static download URLs.
filters
list_filters
List the values the catalog uses for type, badge, auth, category, license, task, verified and lastVerified, with how many entries have each. Call this first to pick exact filter values.
ingestion
get_ingestion_skill
Return the agent-ready ingestion skill for one data source as markdown: how to get access, the exact request or download, the response format, a Python snippet that loads it into pandas and writes Parquet (or keeps it in memory where the provider's terms limit storage or leave it unclear), limits, known quirks, terms and attribution, and the provider pages it was written from, with quotes. Call it without a slug to list the sources that have a skill so far.
source
get_source_urls
Return where each entry's data comes from: the provider's site, docs and evidence pages, the license or terms URL with the license note, and the lastVerified date, plus the Signal Lab page. Pass up to 25 slugs, or the same filters as search_catalog (all entries if none). A URL the catalog does not record is left out.

Endpoints

URLTransportStateLatencyChecked
https://signal-lab-jet.vercel.app/api/mcp streamable-http answering 71 ms 7 min ago

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Signal Lab: free data for trading and AI agents — questions

Answers built from our own checks of this server.

What can Signal Lab: free data for trading and AI agents do?
It exposes 8 tools, read directly from the server on our last check. Among them: catalog_info, compare_entries, export_catalog, get_entry, get_ingestion_skill, get_source_urls and 2 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is Signal Lab: free data for trading and AI agents working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 3 of 91 checks got a reply (3.3%), average response time 1554 ms. The bar chart above shows every period we have measured.
The registry lists Signal Lab: free data for trading and AI agents as active — why does it not respond?
The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.
How do I connect Signal Lab: free data for trading and AI agents?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Signal Lab: free data for trading and AI agents need an API key?
No. Signal Lab: free data for trading and AI agents completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 8 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Signal Lab: free data for trading and AI agents?
It answers our handshake in 1554 ms on average, which is faster than 1% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.