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FACTRAIL

by baronsigma · remote · no sign-in to list tools · v2.4.1 · published by GitHub user baronsigma

Evidence infrastructure for agents: source-backed company verification and beta import assessment.

Changes · 5
CompareRegistry entry

7 tools: 5 change things and 2 only read.

Scanned Oct 21, 2026

1 check matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http factrail https://mcp.factrail.online/mcp

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warnassess_import

    The server marks "assess_import" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

    Matched text

    annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "assess_import" says "import": a word for a change.

    What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

7 tools

Changes things 5Claude Code: ask
  • assess_importDeprecated: use factrail_assess instead.1 finding

    Why it is in this group

    • The name "assess_import" says "import": a word for a change.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "assess_import" read-only (readOnlyHint: true), and its own name, description or input give the class "write".

      Matched text

      annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":true}; The name "assess_import" says "import": a word for a change.

      What this check looks for
    Description, as the server wrote it
    Deprecated: use factrail_assess instead. Use when an older integration still expects the legacy beta EU import assessment format; coverage may be partial or provisional and this is not a binding customs result.

    Annotations the server declares

    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
    • readOnlyHint: true
    • title: [Deprecated] EU Import Assessment
  • factrail_assessUse when you need a source-backed assessment of importing a product into the EU (tariff classification, duties, and related evidence).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
    Use when you need a source-backed assessment of importing a product into the EU (tariff classification, duties, and related evidence). Returns an EvidenceEnvelope; import assessment is Beta and results expose source coverage and support levels.

    Annotations the server declares

    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
    • readOnlyHint: true
    • title: Assess EU Import (Beta)
  • factrail_capabilitiesUse when you need to discover what FACTRAIL can verify or assess before calling another tool.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
    Use when you need to discover what FACTRAIL can verify or assess before calling another tool. Returns available capabilities, inputs, fields, sources, versions, and limitations; call first to inspect current coverage and source state.

    Annotations the server declares

    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
    • readOnlyHint: true
    • title: FACTRAIL Capabilities
  • factrail_verifyUse when you need verified, source-backed facts about a French company from its SIREN or SIRET.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
    Use when you need verified, source-backed facts about a French company from its SIREN or SIRET. Returns Evidence with provenance, freshness, coverage, conflicts, and a reusable receipt.

    Annotations the server declares

    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
    • readOnlyHint: true
    • title: Verify French Company
  • verify_french_companyDeprecated: use factrail_verify instead.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
    Deprecated: use factrail_verify instead. Use when an older integration still expects the legacy flat French company lookup by SIREN/SIRET; kept callable for compatibility only.

    Annotations the server declares

    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
    • readOnlyHint: true
    • title: [Deprecated] French Company Lookup
Only reads 2Claude Code: allow
  • analyze_companyDeprecated: use factrail_verify instead.No findings

    Why it is in this group

    • The name "analyze_company" says "analyze": a word for reading.
    Description, as the server wrote it
    Deprecated: use factrail_verify instead. Use only when an older integration still calls this experimental tool; financial and credit data sources are unavailable and returned fields are null.

    Annotations the server declares

    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
    • readOnlyHint: true
    • title: [Deprecated] Company Analysis
  • factrail_get_receiptUse when you need to re-fetch or audit a previously returned FACTRAIL result by its receipt ID.No findings

    Why it is in this group

    • The name "factrail_get_receipt" says "get": a word for reading.
    Description, as the server wrote it
    Use when you need to re-fetch or audit a previously returned FACTRAIL result by its receipt ID. Recomputes the stored EvidenceEnvelope's content hash and rejects altered content; this checks integrity, not truth.

    Annotations the server declares

    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
    • readOnlyHint: true
    • title: Get Evidence Receipt

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.

Install

Pinned to version 2.4.1. Values in angle brackets are yours to fill in.

claude mcp add --transport http factrail https://mcp.factrail.online/mcp

Run in a terminal.

Claude Code permissions

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

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__factrail__factrail_get_receipt",
      "mcp__factrail__analyze_company"
    ],
    "ask": [
      "mcp__factrail__factrail_capabilities",
      "mcp__factrail__factrail_assess",
      "mcp__factrail__factrail_verify",
      "mcp__factrail__verify_french_company",
      "mcp__factrail__assess_import"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as factrail. Review it before you use it.