gumroad.com agentic web readiness

B Manifest validity: 50% (1/2 valid, 3 errors, 8 warnings) · Surface score 30 (coverage 20 + breadth 0 + conformance 10). 2 standards observed across 2 of 9 steps; 2 manifests present (+ robots.txt), 3 errors, 8 warnings. Checked 2026-10-25 12:32:21 UTC. This grades the agent-facing files published at gumroad.com, not the organisation's products.

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Coverage by step

Manifests

{
  "$schema": "https://static.modelcontextprotocol.io/schemas/v1/server-card.schema.json",
  "name": "com.gumroad/gumroad",
  "title": "Gumroad",
  "version": "1.0.0",
  "description": "Gumroad and what it offers to agents",
  "websiteUrl": "https://gumroad.com/",
  "icons": [
    {
      "src": "https://gumroad.com/icon.png",
      "mimeType": "image/png",
      "sizes": [
        "180x180"
      ]
    }
  ],
  "remotes": [
    {
      "type": "streamable-http",
      "url": "https://gumroad.com/mcp",
      "supportedProtocolVersions": [
        "2025-11-25",
        "2025-06-18",
        "2025-03-26"
      ]
    }
  ]
}

What an agent can call

• llms.txt: Gumroad, 11 links
• robots.txt AI policy: no AI crawler tokens named; unlisted crawlers allowed on public paths (subpaths disallowed under User-agent: *)
• OAuth protected resource https://gumroad.com/muse/v1/mcp, authorization servers: https://gumroad.com

Standards observed

• llms.txt https://gumroad.com/llms.txt
• OAuth Protected Resource and Authorization Server Metadata (as used for agent authorization) https://gumroad.com/.well-known/oauth-protected-resource

Cheapest next steps

1. Agentic Resource Discovery: a catalog at /.well-known/ard.json lets agents discover your APIs, MCP servers and data in one fetch (emerging spec — publish only if you run the underlying endpoints; generate via MCP template({"id": "ard", "domain": "gumroad.com"}))
2. AGENTS.md: instructions for coding agents working on or with the site
   Generate starter /AGENTS.md for gumroad.com

   # Gumroad for agents
   
   Gumroad and what it offers to agents
   
   ## Read the data, not the HTML
   - Index: https://gumroad.com/llms.txt
   - API description: https://gumroad.com/openapi.json
   - Discovery catalog: https://gumroad.com/.well-known/ard.json
   
   ## Calling
   - MCP server (Streamable HTTP): https://gumroad.com/mcp
   - Rate limits and authentication: describe them here
   
   ## Conventions
   - How to cite or attribute content
   - What not to do (no scraping of /account/, no automated sign-ups, etc.)
   
   Contact: security@gumroad.com
   

3. api-catalog: A Well-Known URI and Link Relation to Help Discovery of APIs: an RFC 9727 linkset pointing at your OpenAPI description (conditional spec — publish only if you run the underlying endpoints; generate via MCP template({"id": "api-catalog-rfc9727", "domain": "gumroad.com"}))

Agent pre-flight & practical readiness

Preferred mode: llms_txt. GET /llms.txt and follow the links it names. That index is the page list an agent should read.

Fetch: GET https://gumroad.com/llms.txt GET /llms.txt and follow its links.

Practical readability: exa_parsable yes, markdown negotiation no, render ssr_rich, HTML quality high, first content at byte 3782, HTML-to-llms.txt token ratio 57.463×.

AI crawler posture: open_to_all · Assistant access: OpenAI allowed, Anthropic allowed, Google allowed, Perplexity allowed, Exa allowed.

Readiness subscores: reach 19/20, readability 20/30, capabilities 6/35, conformance 10/15, total 55/100, grade B.

How the grade is made

+10 per lifecycle step with a standard observed, counting manifests that validate or that the probe rule for the standard recognises (a valid MCP server card counts for MCP; max 90); +3 per observed standard beyond the first two (max 15); conformance +15 (+10 with one manifest) minus 5 per agent-facing manifest with errors, never below 0 (security.txt is reported, not scored). Lifecycle grade: A+ >= 60, A >= 45, B >= 30, C >= 20, D >= 10. Strict 100-point composite (subscores.total_100 / subscores.grade_100): reach_and_policy (20) + readability (30) + capabilities (35) + conformance (15), where A+ >= 80, A >= 65, B >= 45, C >= 28, D >= 15. Errors are specification violations; warnings are best-practice gaps. Only public paths are fetched, without credentials, so standards that need a login (skipped in the probe) are not counted either way. The same report is the validate_manifest tool on the MCP server.

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