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Signal Lab: free financial data sources

io.github.QDThead/signal-labQDTheadstreamable-httpv1.2.0Scanned

Search and export a catalog of free financial data sources, with terms URLs and ingestion skills.

8 tools: 1 change things and 7 only read.

Tools: 0 delete, 0 irreversible, 1 write, 7 read.
  • Reads private data · 2
  • Reads text others write · 1
  • Can send data out · 0
  • No findings

Anlyon alternative

1 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

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Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

8 tools

Changes things 1Claude Code: ask
  • export_catalogExport the Signal Lab catalog as JSON or CSV: every entry, or only those matching the same filters as search_catalog (no result cap).No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    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.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
Only reads 7Show 7 read-only tools
  • catalog_infoReturn the catalog's notice, schemaVersion, generated time, entry count and the download URLs of the full catalog as JSON and CSV.No findings

    Why it is in this group

    • The description's first verb is "return": a word for reading.
    Description, as the server wrote it
    Return the catalog's notice, schemaVersion, generated time, entry count and the download URLs of the full catalog as JSON and CSV.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • compare_entriesPlace the catalog's fields for up to 5 entries side by side.No findings

    Why it is in this group

    • The name "compare_entries" says "compare": a word for reading.
    Description, as the server wrote it
    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.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_entryReturn one catalog entry by slug, with every field the catalog has for it (limits, coverage, auth, license, licenseNote, source URLs, lastVerified).Reads private dataNo findings

    Why it is in this group

    • The name "get_entry" says "get": a word for reading.

    What it can reach

    • private-dataThe description's first sentence says "return" and "note": it reads notes.
    Description, as the server wrote it
    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.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_ingestion_skillReturn 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 p…No findings

    Why it is in this group

    • The name "get_ingestion_skill" says "get": a word for reading.
    Description, as the server wrote it
    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, 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.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_source_urlsReturn 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 …Reads private dataReads text others writeNo findings

    Why it is in this group

    • The name "get_source_urls" says "get": a word for reading.

    What it can reach

    • private-dataThe description's first sentence says "return" and "doc": it reads documents.
    • untrusted-inputThe name "get_source_urls" says "get" and "url": it reads web pages, which anyone can write.
    • untrusted-inputThe description's first sentence says "return" and "url": it reads web pages, which anyone can write.
    Description, as the server wrote it
    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.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • list_filtersList the values the catalog uses for type, badge, auth, category, license, task, verified and lastVerified, with how many entries have each.No findings

    Why it is in this group

    • The name "list_filters" says "list": a word for reading.
    Description, as the server wrote it
    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.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • search_catalogFind 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, …No findings

    Why it is in this group

    • The name "search_catalog" says "search": a word for reading.
    Description, as the server wrote it
    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.

    Annotations the server declares

    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged outbound.

Reads private data2
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write1
Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out0
Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Findings

Matches of fixed checks, with the text they matched.

No check matched anything in these tool definitions. That is not a safety guarantee.

History

Changes to its tool definitions and to its remote endpoint, newest first.

  1. Tools1 added.+1 addedView diff
All changes to this server

Install

Pinned to version 1.2.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http signal-lab https://signal-lab-jet.vercel.app/api/mcp
claude mcp add --transport http signal-lab https://signal-lab-jet.vercel.app/api/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__signal-lab__search_catalog",
      "mcp__signal-lab__get_entry",
      "mcp__signal-lab__compare_entries",
      "mcp__signal-lab__list_filters",
      "mcp__signal-lab__catalog_info",
      "mcp__signal-lab__get_source_urls",
      "mcp__signal-lab__get_ingestion_skill"
    ],
    "ask": [
      "mcp__signal-lab__export_catalog"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as signal-lab. Review it before you use it.

Capability tags behind 2 rules
  • mcp__signal-lab__get_entry private-data
  • mcp__signal-lab__get_source_urls private-data, untrusted-input

Pin

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/io.github.QDThead/signal-lab/verify?hash=cec43e3d91ca7ff75c1c0d285e9b6230511723034a8db8a56a88aba2cbe97e09" | jq -e '.changed == false'

Pinned hash cec43e3d91ca, from Oct 30, 2026, 01:18 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/io.github.QDThead/signal-lab/changes.xml

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anlyon.dev badge for io.github.QDThead/signal-lab
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Source: MCP Registry · repository. Synced Oct 30, 2026, 01:17 UTC.