{
  "$schema_doc": "https://gtmstacker.com/registry/schema/entry.schema.json",
  "stability": "emerging",
  "generator": "agentic-media-registry",
  "generated_at": "2026-09-09T00:00:00Z",
  "id": "com.gtmstacker.registry/tool/geiger",
  "type": "tool",
  "slug": "geiger",
  "canonical_url": "https://gtmstacker.com/registry/tool/geiger/",
  "title": "Geiger",
  "description": "Open-source, dependency-free CLI (JavaScript) that inventories every AI agent, MCP server, plugin and extension on a machine and reports what each can access — read-only, no install, no telemetry. Agent observability and least-privilege review for a local stack.",
  "category": "mcp-agents",
  "tags": [
    "mcp-agents",
    "agent-security",
    "observability",
    "least-privilege",
    "governance",
    "cli"
  ],
  "status": "active",
  "revision": 1,
  "content_hash": "95abe8c3ec88e0bc51be1e4bbe0542ef2e7ad819a048e8d9911bd74c2cd7f1ab",
  "date_published": "2026-09-09T00:00:00Z",
  "date_modified": "2026-09-09T00:00:00Z",
  "source": {
    "name": "github · Atomburstofficial/geiger",
    "url": "https://github.com/Atomburstofficial/geiger"
  },
  "license": "MIT",
  "one_liner": "Geiger is a read-only CLI that shows every AI agent, MCP server and plugin on your machine and what each can touch.",
  "open_source": "yes",
  "self_hostable": "yes",
  "pricing_model": "free",
  "who_its_for": "Engineers who want a fast, local, no-telemetry inventory of what their installed agents and MCP servers can access.",
  "aliases": [
    "Geiger"
  ],
  "alternatives": [
    "tripwire",
    "magicvault"
  ],
  "secondary_categories": [
    "ai-infrastructure"
  ],
  "last_verified": "2026-09-09",
  "evidence": {
    "claim_type": "mixed",
    "source_id": "https://github.com/Atomburstofficial/geiger",
    "note": "License + traction WebFetch-verified 2026-09-09; feature claims are vendor/README."
  },
  "caveats": "Early (10 commits) but read-only and dependency-free by design — it reports access, it does not enforce it. Pair with an enforcement/secrets layer.",
  "lead": "Open-source, dependency-free CLI (JavaScript) that inventories every AI agent, MCP server, plugin and extension on a machine and reports what each can access — read-only, no install, no telemetry. Agent observability and least-privilege review for a local stack.",
  "chunks": [
    {
      "index": 0,
      "heading_path": [],
      "est_tokens": 66,
      "text": "Open-source, dependency-free CLI (JavaScript) that inventories every AI agent, MCP server, plugin and extension on a machine and reports what each can access — read-only, no install, no telemetry. Agent observability and least-privilege review for a local stack."
    },
    {
      "index": 1,
      "heading_path": [
        null,
        "Provenance"
      ],
      "est_tokens": 153,
      "text": "Open-source, dependency-free CLI (JavaScript) that inventories every AI agent, MCP server, plugin and extension on a machine and reports what each can access — read-only, no install, no telemetry. Agent observability and least-privilege review for a local stack.\n\n- MIT independently WebFetch-verified 2026-09-09 (26★, 10 commits; dependency-free JavaScript). Best HN traction of the pull (14 points). Surfaced via the 2026-09-09 daily pull agent-safety cluster.\n- Curated from the GTM Stacker signal registry (2026-09-09 pass: daily pull + viral-posts brief); license independently WebFetch-verified 2026-09-09."
    }
  ],
  "alternates": {
    "markdown": "https://gtmstacker.com/registry/tool/geiger/index.md",
    "html": "https://gtmstacker.com/registry/tool/geiger/",
    "json": "https://gtmstacker.com/registry/tool/geiger/index.json",
    "server_json": "https://gtmstacker.com/registry/tool/geiger/server.json"
  },
  "jsonld": {
    "@context": "https://schema.org",
    "@graph": [
      {
        "@type": "WebSite",
        "@id": "https://gtmstacker.com/#website",
        "url": "https://gtmstacker.com/",
        "name": "GTM Stacker Agent Registry",
        "description": "A daily-updated, agent-native registry of open-source tool discoveries, tool updates, and curated news for the go-to-market / RevOps engineering niche. Machine-readable first: agents can discover, parse, page, and delta-sync it without scraping HTML.",
        "inLanguage": "en",
        "publisher": {
          "@id": "https://gtmstacker.com/#organization"
        }
      },
      {
        "@type": "Organization",
        "@id": "https://gtmstacker.com/#organization",
        "name": "GTM Stacker",
        "url": "https://gtmstacker.com",
        "description": "The growth-systems practice of Theo Popov: AI-native enrichment, outbound, content engines and internal tooling for startups and venture programs. Its agent-native media property, the GTM Stacker Agent Registry, maintains a daily-updated catalog of open-source go-to-market and RevOps tools that both people and AI engines can discover, compare, and cite.",
        "foundingDate": "2024-08",
        "knowsAbout": [
          "go-to-market engineering",
          "RevOps",
          "sales automation",
          "marketing operations",
          "open-source software",
          "AI agents"
        ],
        "founder": {
          "@type": "Person",
          "@id": "https://gtmstacker.com/#founder",
          "name": "Theo Popov",
          "jobTitle": "Growth Operations & GTM Systems",
          "url": "https://gtmstacker.com/about/",
          "sameAs": [
            "https://www.linkedin.com/in/theo-popov",
            "https://x.com/Theo_Popov",
            "https://github.com/theopopov"
          ],
          "worksFor": {
            "@id": "https://gtmstacker.com/#organization"
          }
        },
        "mainEntityOfPage": "https://gtmstacker.com/registry/about/"
      },
      {
        "@type": "SoftwareApplication",
        "@id": "https://gtmstacker.com/registry/tool/geiger/#software",
        "name": "Geiger",
        "identifier": "io.github.atomburstofficial/geiger",
        "description": "Open-source, dependency-free CLI (JavaScript) that inventories every AI agent, MCP server, plugin and extension on a machine and reports what each can access — read-only, no install, no telemetry. Agent observability and least-privilege review for a local stack.",
        "applicationCategory": "DeveloperApplication",
        "url": "https://gtmstacker.com/registry/tool/geiger/",
        "datePublished": "2026-09-09T00:00:00Z",
        "dateModified": "2026-09-09T00:00:00Z",
        "isPartOf": {
          "@id": "https://gtmstacker.com/#website"
        },
        "license": "MIT",
        "codeRepository": "https://github.com/Atomburstofficial/geiger",
        "keywords": "mcp-agents, ai-infrastructure, agent-security, observability, least-privilege, governance, cli",
        "author": {
          "@type": "Organization",
          "name": "Atomburstofficial",
          "url": "https://github.com/Atomburstofficial",
          "sameAs": [
            "https://github.com/Atomburstofficial/geiger"
          ]
        },
        "offers": {
          "@type": "Offer",
          "price": 0,
          "priceCurrency": "USD"
        },
        "isSimilarTo": [
          {
            "@type": "SoftwareApplication",
            "name": "MagicVault",
            "url": "https://gtmstacker.com/registry/tool/magicvault/"
          }
        ]
      },
      {
        "@type": "BreadcrumbList",
        "@id": "https://gtmstacker.com/registry/tool/geiger/#breadcrumb",
        "itemListElement": [
          {
            "@type": "ListItem",
            "position": 1,
            "name": "GTM Stacker Registry",
            "item": "https://gtmstacker.com/registry/"
          },
          {
            "@type": "ListItem",
            "position": 2,
            "name": "MCP Agents",
            "item": "https://gtmstacker.com/registry/category/mcp-agents/"
          },
          {
            "@type": "ListItem",
            "position": 3,
            "name": "Geiger",
            "item": "https://gtmstacker.com/registry/tool/geiger/"
          }
        ]
      }
    ]
  },
  "tool": {
    "name": "io.github.atomburstofficial/geiger",
    "repository": {
      "url": "https://github.com/Atomburstofficial/geiger",
      "source": "github"
    }
  }
}
