{"kind":"web","tier":"cache","target":"intercom.com","scorecard_url":"https://anc.dev/score/intercom.com","markdown_url":"https://anc.dev/score/intercom.com/md","json_url":"https://anc.dev/score/intercom.com/json","freshness":{"cached":true,"scored_at":"2026-09-15T19:00:20.782Z","refresh_after":"2026-09-15T19:01:20.782Z"},"spec_version":"0.5.0","scorecard":{"schema_version":"0.4","spec_version":"0.5.0","target_url":"https://intercom.com/","mcp_endpoint":null,"mcp_discovery":[{"source":"/.well-known/mcp/server-card.json","endpoint":"https://mcp.intercom.com/mcp","blocked":"off-origin endpoint declaration"},{"source":"/mcp","status":403,"probed":"initialize (no serverInfo)"},{"source":"/sse","status":403,"probed":"initialize (no serverInfo)"},{"source":"/message","status":403,"probed":"initialize (no serverInfo)"},{"source":"/mcp","status":403,"probed":"modern-tools-list (no tools)"},{"source":"/sse","status":403,"probed":"modern-tools-list (no tools)"},{"source":"/message","status":403,"probed":"modern-tools-list (no tools)"}],"tool":{"name":"intercom.com","url":"https://intercom.com/"},"audience":null,"audit_profile":null,"site_type":null,"public_listing":true,"summary":{"pass":17,"noncompliant":0,"broken":2,"absent":7,"n_a":39,"skip":0,"error":0},"coverage_summary":{"must":{"total":1,"verified":0},"should":{"total":19,"verified":11},"may":{"total":6,"verified":6}},"score_pct":58,"score":{"relative":58,"global":22},"categories":[{"id":"discoverability","name":"Discoverability","passed":4,"counted":6},{"id":"content-for-agents","name":"Content for agents","passed":9,"counted":12},{"id":"bot-crawl-policy","name":"Bot & crawl policy","passed":3,"counted":4},{"id":"api","name":"API","passed":1,"counted":4},{"id":"mcp","name":"MCP","passed":0,"counted":0},{"id":"agent-discovery-auth","name":"Agent discovery & auth","passed":0,"counted":0}],"results":[{"id":"openapi","label":"An OpenAPI description is published","category":"api","group":"P2","layer":"web","keyword":"must","tier":"required","principle":"P2","status":"absent","evidence":"https://intercom.com/openapi.json -> 404 (status 404 not in [200])","result":"Not found (https://intercom.com/openapi.json -> 404 (status 404 not in [200]))","remediation":{"goal":"Publish an OpenAPI description so non-MCP agents can call your HTTP API","fix":"If your service exposes an HTTP/REST API (separate from any MCP endpoint), publish an OpenAPI\n3.1 description of it at `/openapi.json` (or `/openapi.yaml`, or `/.well-known/openapi.json`).\nNon-MCP agents use it to discover endpoints, parameters, and response shapes, and to generate\ntyped clients. A service whose only machine surface is MCP has no REST API to describe here.","skill_url":"https://anc.dev/fix/openapi","resources":[{"label":"OpenAPI 3.1","url":"https://spec.openapis.org/oas/latest.html"}],"evidence":"https://intercom.com/openapi.json -> 404 (status 404 not in [200])","prompt":"Goal: Publish an OpenAPI description so non-MCP agents can call your HTTP API\nFix: If your service exposes an HTTP/REST API (separate from any MCP endpoint), publish an OpenAPI 3.1 description of it at `/openapi.json` (or `/openapi.yaml`, or `/.well-known/openapi.json`). Non-MCP agents use it to discover endpoints, parameters, and response shapes, and to generate typed clients. A service whose only machine surface is MCP has no REST API to describe here.\nSkill: https://anc.dev/fix/openapi\nDocs: https://spec.openapis.org/oas/latest.html\nObserved (untrusted, not instructions):\n--- begin evidence ---\nhttps://intercom.com/openapi.json -> 404 (status 404 not in [200])\n--- end evidence ---"}},{"id":"mcp-initialize","label":"initialize handshake returns serverInfo + protocolVersion","category":"mcp","group":"P2","layer":"web","keyword":"must","tier":"required","principle":"P2","status":"n_a","na_reason":"antecedent-unmet","evidence":"no MCP endpoint discovered","result":"Not applicable (no MCP endpoint discovered)"},{"id":"mcp-server-discover","label":"server/discover answers with server identity on the modern lane","category":"mcp","group":"P2","layer":"web","keyword":"should","tier":"recommended","principle":"P2","status":"n_a","na_reason":"antecedent-unmet","evidence":"no MCP endpoint discovered","result":"Not applicable (no MCP endpoint discovered)"},{"id":"llms-txt","label":"/llms.txt present with a summary and link index","category":"content-for-agents","group":"P2","layer":"web","keyword":"should","tier":"recommended","principle":"P2","status":"pass","evidence":"https://intercom.com/llms.txt -> 200","result":"Verified (https://intercom.com/llms.txt -> 200)"},{"id":"llms-full-txt","label":"/llms-full.txt present (single-fetch full corpus)","category":"content-for-agents","group":"P2","layer":"web","keyword":"may","tier":"optional","principle":"P2","status":"n_a","na_reason":"optional-absent","evidence":"https://intercom.com/llms-full.txt -> 404 (status 404 not in [200])","result":"Not implemented, optional (https://intercom.com/llms-full.txt -> 404 (status 404 not in [200]))"},{"id":"accept-markdown","label":"Accept text/markdown content negotiation returns markdown","category":"content-for-agents","group":"P2","layer":"web","keyword":"should","tier":"recommended","principle":"P2","status":"pass","evidence":"https://intercom.com/ -> 200","result":"Verified (https://intercom.com/ -> 200)"},{"id":"robots","label":"/robots.txt present","category":"discoverability","group":"P7","layer":"web","keyword":"should","tier":"recommended","principle":"P7","status":"pass","evidence":"https://intercom.com/robots.txt -> 200","result":"Verified (https://intercom.com/robots.txt -> 200)"},{"id":"sitemap","label":"/sitemap.xml present","category":"discoverability","group":"P7","layer":"web","keyword":"may","tier":"optional","principle":"P7","status":"pass","evidence":"https://intercom.com/sitemap.xml -> 200","result":"Verified (https://intercom.com/sitemap.xml -> 200)"},{"id":"oauth-discovery","label":"OAuth/OIDC discovery metadata published","category":"agent-discovery-auth","group":"P1","layer":"web","keyword":"may","tier":"optional","principle":"P1","status":"n_a","na_reason":"antecedent-unmet","evidence":"no auth surface detected","result":"Not applicable (no auth surface detected)"},{"id":"json-schemas","label":"Referenced JSON Schemas resolve as application/schema+json","category":"api","group":"P2","layer":"web","keyword":"may","tier":"optional","principle":"P2","status":"n_a","na_reason":"antecedent-unmet","evidence":"no JSON Schema references detected","result":"Not applicable (no JSON Schema references detected)"},{"id":"mcp-capabilities","label":"initialize advertises capabilities (tools / resources / prompts)","category":"mcp","group":"P2","layer":"web","keyword":"should","tier":"recommended","principle":"P2","status":"n_a","na_reason":"antecedent-unmet","evidence":"no MCP endpoint discovered","result":"Not applicable (no MCP endpoint discovered)"},{"id":"mcp-tools-list","label":"tools/list returns a tools array with input schemas","category":"mcp","group":"P2","layer":"web","keyword":"must","tier":"required","principle":"P2","status":"n_a","na_reason":"antecedent-unmet","evidence":"no MCP endpoint discovered","result":"Not applicable (no MCP endpoint discovered)"},{"id":"mcp-resources-list","label":"resources/list returns at least one resource when advertised","category":"mcp","group":"P2","layer":"web","keyword":"should","tier":"recommended","principle":"P2","status":"n_a","na_reason":"antecedent-unmet","evidence":"neither initialize nor server/discover advertises capabilities.resources","result":"Not applicable (neither initialize nor server/discover advertises capabilities.resources)"},{"id":"mcp-modern-tools-list","label":"header-routed tools/list (2026-07-28) returns tools without initialize","category":"mcp","group":"P2","layer":"web","keyword":"must","tier":"required","principle":"P2","status":"n_a","na_reason":"antecedent-unmet","evidence":"no MCP endpoint discovered","result":"Not applicable (no MCP endpoint discovered)"},{"id":"mcp-unknown-method","label":"unknown JSON-RPC method returns -32601","category":"mcp","group":"P4","layer":"web","keyword":"should","tier":"recommended","principle":"P4","status":"n_a","na_reason":"antecedent-unmet","evidence":"no MCP endpoint discovered","result":"Not applicable (no MCP endpoint discovered)"},{"id":"mcp-malformed-body","label":"a non-JSON body draws -32700 (or a typed HTTP 400/415 refusal)","category":"mcp","group":"P4","layer":"web","keyword":"should","tier":"recommended","principle":"P4","status":"n_a","na_reason":"antecedent-unmet","evidence":"no MCP endpoint discovered","result":"Not applicable (no MCP endpoint discovered)"},{"id":"mcp-batch-reject","label":"a batch carrying a modern-envelope request is rejected -32600","category":"mcp","group":"P4","layer":"web","keyword":"should","tier":"recommended","principle":"P4","status":"n_a","na_reason":"antecedent-unmet","evidence":"no MCP endpoint discovered","result":"Not applicable (no MCP endpoint discovered)"},{"id":"mcp-unknown-tool","label":"tools/call with an unknown tool name returns -32602","category":"mcp","group":"P4","layer":"web","keyword":"should","tier":"recommended","principle":"P4","status":"n_a","na_reason":"antecedent-unmet","evidence":"no MCP endpoint discovered","result":"Not applicable (no MCP endpoint discovered)"},{"id":"mcp-modern-unknown-method","label":"an unknown method on the modern lane returns -32601","category":"mcp","group":"P4","layer":"web","keyword":"should","tier":"recommended","principle":"P4","status":"n_a","na_reason":"antecedent-unmet","evidence":"no MCP endpoint discovered","result":"Not applicable (no MCP endpoint discovered)"},{"id":"mcp-modern-clientcaps","label":"_meta missing clientCapabilities is rejected (-32602 or -32600)","category":"mcp","group":"P4","layer":"web","keyword":"should","tier":"recommended","principle":"P4","status":"n_a","na_reason":"antecedent-unmet","evidence":"no MCP endpoint discovered","result":"Not applicable (no MCP endpoint discovered)"},{"id":"mcp-modern-header-mismatch","label":"an Mcp-Method header disagreeing with the body method draws -32020","category":"mcp","group":"P4","layer":"web","keyword":"should","tier":"recommended","principle":"P4","status":"n_a","na_reason":"antecedent-unmet","evidence":"no MCP endpoint discovered","result":"Not applicable (no MCP endpoint discovered)"},{"id":"mcp-modern-version-reject","label":"an unsupported protocol version is rejected -32022 with data.supported","category":"mcp","group":"P4","layer":"web","keyword":"should","tier":"recommended","principle":"P4","status":"n_a","na_reason":"antecedent-unmet","evidence":"no MCP endpoint discovered","result":"Not applicable (no MCP endpoint discovered)"},{"id":"mcp-modern-resources-miss","label":"modern resources/read with an unknown URI returns -32602","category":"mcp","group":"P4","layer":"web","keyword":"should","tier":"recommended","principle":"P4","status":"n_a","na_reason":"antecedent-unmet","evidence":"neither initialize nor server/discover advertises capabilities.resources","result":"Not applicable (neither initialize nor server/discover advertises capabilities.resources)"},{"id":"mcp-accept-json","label":"a JSON-only Accept is answered without SSE framing","category":"mcp","group":"P4","layer":"web","keyword":"should","tier":"recommended","principle":"P4","status":"n_a","na_reason":"antecedent-unmet","evidence":"no MCP endpoint discovered","result":"Not applicable (no MCP endpoint discovered)"},{"id":"mcp-accept-unsatisfiable","label":"an unsatisfiable Accept draws a 406 rather than an unasked-for type","category":"mcp","group":"P4","layer":"web","keyword":"should","tier":"recommended","principle":"P4","status":"n_a","na_reason":"antecedent-unmet","evidence":"no MCP endpoint discovered","result":"Not applicable (no MCP endpoint discovered)"},{"id":"mcp-get-fast-fail","label":"GET on the MCP endpoint answers fast (not a held-open hang)","category":"mcp","group":"P4","layer":"web","keyword":"should","tier":"recommended","principle":"P4","status":"n_a","na_reason":"antecedent-unmet","evidence":"no MCP endpoint discovered","result":"Not applicable (no MCP endpoint discovered)"},{"id":"mcp-cors-preflight","label":"CORS preflight (OPTIONS) succeeds with Access-Control-Allow-* headers","category":"mcp","group":"P6","layer":"web","keyword":"should","tier":"recommended","principle":"P6","status":"n_a","na_reason":"antecedent-unmet","evidence":"no MCP endpoint discovered","result":"Not applicable (no MCP endpoint discovered)"},{"id":"mcp-cors-actual","label":"POST response carries Access-Control-Allow-Origin","category":"mcp","group":"P6","layer":"web","keyword":"should","tier":"recommended","principle":"P6","status":"n_a","na_reason":"antecedent-unmet","evidence":"no MCP endpoint discovered","result":"Not applicable (no MCP endpoint discovered)"},{"id":"well-known-mcp-card","label":"A .well-known MCP server card is published (SEP-1649)","category":"mcp","group":"P8","layer":"web","keyword":"should","tier":"recommended","principle":"P8","status":"n_a","na_reason":"antecedent-unmet","evidence":"no MCP endpoint discovered","result":"Not applicable (no MCP endpoint discovered)"},{"id":"mcp-card-legacy-aliases","label":"Legacy MCP card paths redirect to the canonical card","category":"mcp","group":"P8","layer":"web","keyword":"may","tier":"optional","principle":"P8","status":"n_a","na_reason":"antecedent-unmet","evidence":"no MCP endpoint discovered","result":"Not applicable (no MCP endpoint discovered)"},{"id":"mcp-usage-doc","label":"A human/agent usage doc for the server resolves","category":"mcp","group":"P8","layer":"web","keyword":"may","tier":"optional","principle":"P8","status":"n_a","na_reason":"antecedent-unmet","evidence":"no MCP endpoint discovered","result":"Not applicable (no MCP endpoint discovered)"},{"id":"llms-full-txt-scoped","label":"Per-section llms-full.txt files resolve under content subdirectories","category":"content-for-agents","group":"P2","layer":"web","keyword":"may","tier":"optional","principle":"P2","status":"n_a","na_reason":"antecedent-unmet","evidence":"root llms-full.txt not present","result":"Not applicable (root llms-full.txt not present)"},{"id":"oauth-protected-resource","label":"OAuth Protected Resource Metadata published (RFC 9728)","category":"agent-discovery-auth","group":"P1","layer":"web","keyword":"may","tier":"optional","principle":"P1","status":"n_a","na_reason":"antecedent-unmet","evidence":"MCP endpoint does not challenge for auth","result":"Not applicable (MCP endpoint does not challenge for auth)"},{"id":"auth-md","label":"Agent auth/registration metadata doc published","category":"agent-discovery-auth","group":"P1","layer":"web","keyword":"may","tier":"optional","principle":"P1","status":"n_a","na_reason":"antecedent-unmet","evidence":"no auth surface detected","result":"Not applicable (no auth surface detected)"},{"id":"webmcp","label":"Root HTML exposes WebMCP browser tools","category":"mcp","group":"P2","layer":"web","keyword":"may","tier":"optional","principle":"P2","status":"n_a","na_reason":"optional-absent","evidence":"https://intercom.com/ -> 200 (no WebMCP markers in root HTML)","result":"Not implemented, optional (https://intercom.com/ -> 200 (no WebMCP markers in root HTML))"},{"id":"llms-txt-format","label":"llms.txt has H1, summary, and a link index","category":"content-for-agents","group":"P2","layer":"web","keyword":"should","tier":"recommended","principle":"P2","status":"pass","evidence":"https://intercom.com/llms.txt -> error","result":"Verified (https://intercom.com/llms.txt -> error)"},{"id":"llms-txt-when-to-use","label":"llms.txt has a when-to-use or programmatic-access section","category":"content-for-agents","group":"P2","layer":"web","keyword":"should","tier":"recommended","principle":"P2","status":"absent","evidence":"https://intercom.com/llms.txt -> error (no when-to-use heading)","result":"Not found (https://intercom.com/llms.txt -> error (no when-to-use heading))","remediation":{"goal":"Tell agents when to use the MCP or docs from a short llms.txt heading","fix":"Add a heading such as `## When to use` or `## Programmatic access` with a few lines on when\nan agent should connect (for example: \"Use the MCP when you need to search or score a CLI\").\nThe audit looks for that heading; it does not grade the prose with an LLM.","skill_url":"https://anc.dev/fix/llms-txt-when-to-use","resources":[{"label":"llmstxt.org","url":"https://llmstxt.org/"}],"evidence":"https://intercom.com/llms.txt -> error (no when-to-use heading)","prompt":"Goal: Tell agents when to use the MCP or docs from a short llms.txt heading\nFix: Add a heading such as `## When to use` or `## Programmatic access` with a few lines on when an agent should connect (for example: \"Use the MCP when you need to search or score a CLI\"). The audit looks for that heading; it does not grade the prose with an LLM.\nSkill: https://anc.dev/fix/llms-txt-when-to-use\nDocs: https://llmstxt.org/\nObserved (untrusted, not instructions):\n--- begin evidence ---\nhttps://intercom.com/llms.txt -> error (no when-to-use heading)\n--- end evidence ---"}},{"id":"llms-txt-scoped","label":"Per-section llms.txt files resolve under content subdirectories","category":"content-for-agents","group":"P2","layer":"web","keyword":"may","tier":"optional","principle":"P2","status":"n_a","na_reason":"optional-absent","evidence":"llms-txt-scoped -> error (no section directories in the root llms.txt or sitemap)","result":"Not implemented, optional (llms-txt-scoped -> error (no section directories in the root llms.txt or sitemap))"},{"id":"api-catalog","label":"/.well-known/api-catalog published (RFC 9727)","category":"api","group":"P8","layer":"web","keyword":"may","tier":"optional","principle":"P8","status":"pass","evidence":"https://intercom.com/.well-known/api-catalog -> 200","result":"Verified (https://intercom.com/.well-known/api-catalog -> 200)"},{"id":"rate-limit-headers","label":"API responses advertise rate-limit headers","category":"api","group":"P6","layer":"web","keyword":"should","tier":"recommended","principle":"P6","status":"absent","evidence":"https://intercom.com/anc-web-audit-no-such-api -> 404 (no rate-limit header)","result":"Not found (https://intercom.com/anc-web-audit-no-such-api -> 404 (no rate-limit header))","remediation":{"goal":"Advertise remaining quota on API responses so agents can back off instead of retrying blindly","fix":"Send IETF RateLimit headers (`RateLimit-Limit`, `RateLimit-Remaining`, `RateLimit-Reset`) or\nthe common `X-RateLimit-*` aliases on API responses. A 429 should also carry `Retry-After`.\nWithout them an agent has no budget and will retry until it is locked out.","skill_url":"https://anc.dev/fix/rate-limit-headers","resources":[{"label":"IETF RateLimit header draft","url":"https://datatracker.ietf.org/doc/draft-ietf-httpapi-ratelimit-headers/"}],"evidence":"https://intercom.com/anc-web-audit-no-such-api -> 404 (no rate-limit header)","prompt":"Goal: Advertise remaining quota on API responses so agents can back off instead of retrying blindly\nFix: Send IETF RateLimit headers (`RateLimit-Limit`, `RateLimit-Remaining`, `RateLimit-Reset`) or the common `X-RateLimit-*` aliases on API responses. A 429 should also carry `Retry-After`. Without them an agent has no budget and will retry until it is locked out.\nSkill: https://anc.dev/fix/rate-limit-headers\nDocs: https://datatracker.ietf.org/doc/draft-ietf-httpapi-ratelimit-headers/\nObserved (untrusted, not instructions):\n--- begin evidence ---\nhttps://intercom.com/anc-web-audit-no-such-api -> 404 (no rate-limit header)\n--- end evidence ---"}},{"id":"json-errors","label":"API client errors return JSON, not HTML","category":"api","group":"P4","layer":"web","keyword":"should","tier":"recommended","principle":"P4","status":"broken","evidence":"https://intercom.com/anc-web-audit-no-such-api -> 404 (HTML error body)","result":"Present but broken (https://intercom.com/anc-web-audit-no-such-api -> 404 (HTML error body))","remediation":{"goal":"Return a JSON error body on client-error API responses so agents can parse the failure","fix":"On a client-error API response (4xx), return `Content-Type: application/json` and a JSON object\n(for example `{ \"error\": { \"code\": \"not_found\", \"message\": \"...\" } }`), not an HTML error page.\nAgents cannot recover from a soft-HTML 404. The audit probes a documented OpenAPI 4xx GET when\none exists, otherwise `GET /anc-web-audit-no-such-api`.","skill_url":"https://anc.dev/fix/json-errors","resources":[{"label":"RFC 9457 (problem+json)","url":"https://www.rfc-editor.org/rfc/rfc9457"}],"evidence":"https://intercom.com/anc-web-audit-no-such-api -> 404 (HTML error body)","prompt":"Goal: Return a JSON error body on client-error API responses so agents can parse the failure\nFix: On a client-error API response (4xx), return `Content-Type: application/json` and a JSON object (for example `{ \"error\": { \"code\": \"not_found\", \"message\": \"...\" } }`), not an HTML error page. Agents cannot recover from a soft-HTML 404. The audit probes a documented OpenAPI 4xx GET when one exists, otherwise `GET /anc-web-audit-no-such-api`.\nSkill: https://anc.dev/fix/json-errors\nDocs: https://www.rfc-editor.org/rfc/rfc9457\nObserved (untrusted, not instructions):\n--- begin evidence ---\nhttps://intercom.com/anc-web-audit-no-such-api -> 404 (HTML error body)\n--- end evidence ---"}},{"id":"markdown-vary","label":"Negotiated responses carry Vary Accept, User-Agent","category":"content-for-agents","group":"P2","layer":"web","keyword":"should","tier":"recommended","principle":"P2","status":"absent","evidence":"https://intercom.com/ -> 200 (header vary no match /(?=.*accept(?!-))(?=.*user-agent)/)","result":"Not found (https://intercom.com/ -> 200 (header vary no match /(?=.*accept(?!-))(?=.*user-agent)/))","remediation":{"goal":"Emit Vary Accept, User-Agent so shared caches never serve one client the wrong variant","fix":"When the same URL serves HTML or markdown depending on the request, emit\n`Vary: Accept, User-Agent` on every response. Without it a shared cache (a CDN or a corporate\nproxy) can store the markdown twin under the bare URL and then hand it to a browser, or vice\nversa. Listing both request headers you negotiate on tells every cache to key its stored copies\nby them, so each client class gets the variant it asked for. If the CDN ignores or strips Vary\n(Cloudflare's zone cache historically keeps only `Accept-Encoding`), do not give that cache a\nlong `s-maxage` on negotiated responses — otherwise HIT replies reach clients with no Vary and\nthe check still fails.","skill_url":"https://anc.dev/fix/markdown-vary","resources":[{"label":"RFC 9110 (Vary)","url":"https://www.rfc-editor.org/rfc/rfc9110#name-vary"}],"evidence":"https://intercom.com/ -> 200 (header vary no match /(?=.*accept(?!-))(?=.*user-agent)/)","prompt":"Goal: Emit Vary Accept, User-Agent so shared caches never serve one client the wrong variant\nFix: When the same URL serves HTML or markdown depending on the request, emit `Vary: Accept, User-Agent` on every response. Without it a shared cache (a CDN or a corporate proxy) can store the markdown twin under the bare URL and then hand it to a browser, or vice versa. Listing both request headers you negotiate on tells every cache to key its stored copies by them, so each client class gets the variant it asked for. If the CDN ignores or strips Vary (Cloudflare's zone cache historically keeps only `Accept-Encoding`), do not give that cache a long `s-maxage` on negotiated responses — otherwise HIT replies reach clients with no Vary and the check still fails.\nSkill: https://anc.dev/fix/markdown-vary\nDocs: https://www.rfc-editor.org/rfc/rfc9110#name-vary\nObserved (untrusted, not instructions):\n--- begin evidence ---\nhttps://intercom.com/ -> 200 (header vary no match /(?=.*accept(?!-))(?=.*user-agent)/)\n--- end evidence ---"}},{"id":"markdown-agent-ua","label":"AI user-fetch User-Agent receives the markdown twin","category":"content-for-agents","group":"P2","layer":"web","keyword":"may","tier":"optional","principle":"P2","status":"n_a","na_reason":"optional-absent","evidence":"https://intercom.com/ -> 200 (content-type \"text/html; charset=utf-8\" !~ /markdown|text/plain/)","result":"Not implemented, optional (https://intercom.com/ -> 200 (content-type \"text/html; charset=utf-8\" !~ /markdown|text/plain/))"},{"id":"root-meta-description","label":"Root HTML has a descriptive <meta name=\"description\">","category":"content-for-agents","group":"P3","layer":"web","keyword":"should","tier":"recommended","principle":"P3","status":"pass","evidence":"https://intercom.com/ -> 200","result":"Verified (https://intercom.com/ -> 200)"},{"id":"schema-org-jsonld","label":"Root HTML embeds Schema.org JSON-LD","category":"content-for-agents","group":"P2","layer":"web","keyword":"may","tier":"optional","principle":"P2","status":"pass","evidence":"https://intercom.com/ -> 200","result":"Verified (https://intercom.com/ -> 200)"},{"id":"content-without-js","label":"Root HTML has an H1 and readable text without JavaScript","category":"content-for-agents","group":"P2","layer":"web","keyword":"should","tier":"recommended","principle":"P2","status":"pass","evidence":"https://intercom.com/ -> 200","result":"Verified (https://intercom.com/ -> 200)"},{"id":"semantic-html","label":"Root HTML uses semantic landmarks","category":"content-for-agents","group":"P3","layer":"web","keyword":"may","tier":"optional","principle":"P3","status":"pass","evidence":"https://intercom.com/ -> 200","result":"Verified (https://intercom.com/ -> 200)"},{"id":"noscript-fallback","label":"Root HTML has a <noscript> with machine entry points","category":"content-for-agents","group":"P1","layer":"web","keyword":"should","tier":"recommended","principle":"P1","status":"absent","evidence":"https://intercom.com/ -> 200 (body no match /<noscript/)","result":"Not found (https://intercom.com/ -> 200 (body no match /<noscript/))","remediation":{"goal":"Give non-JS agents a noscript block listing your machine entry points","fix":"Add a `<noscript>` block to your root HTML that links your machine entry points: `llms.txt`,\nyour OpenAPI or MCP endpoint, and any `.well-known` cards. It hands a fetch-only crawler or a\nnon-JS agent a concrete, in-body list of where the structured surfaces live, so it never has to\nrun the client bundle or infer them from the visible page.","skill_url":"https://anc.dev/fix/noscript-fallback","resources":[{"label":"MDN noscript","url":"https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/noscript"}],"evidence":"https://intercom.com/ -> 200 (body no match /<noscript/)","prompt":"Goal: Give non-JS agents a noscript block listing your machine entry points\nFix: Add a `<noscript>` block to your root HTML that links your machine entry points: `llms.txt`, your OpenAPI or MCP endpoint, and any `.well-known` cards. It hands a fetch-only crawler or a non-JS agent a concrete, in-body list of where the structured surfaces live, so it never has to run the client bundle or infer them from the visible page.\nSkill: https://anc.dev/fix/noscript-fallback\nDocs: https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/noscript\nObserved (untrusted, not instructions):\n--- begin evidence ---\nhttps://intercom.com/ -> 200 (body no match /<noscript/)\n--- end evidence ---"}},{"id":"markdown-frontmatter","label":"Markdown twin carries YAML frontmatter","category":"content-for-agents","group":"P2","layer":"web","keyword":"may","tier":"optional","principle":"P2","status":"pass","evidence":"https://intercom.com/ -> 200","result":"Verified (https://intercom.com/ -> 200)"},{"id":"markdown-cli-ua","label":"Bare CLI User-Agent receives the markdown twin","category":"content-for-agents","group":"P2","layer":"web","keyword":"may","tier":"optional","principle":"P2","status":"n_a","na_reason":"optional-absent","evidence":"https://intercom.com/ -> 200 (content-type \"text/html; charset=utf-8\" !~ /markdown|text/plain/)","result":"Not implemented, optional (https://intercom.com/ -> 200 (content-type \"text/html; charset=utf-8\" !~ /markdown|text/plain/))"},{"id":"link-headers","label":"Homepage sends RFC 8288 Link headers pointing at agent resources","category":"discoverability","group":"P3","layer":"web","keyword":"should","tier":"recommended","principle":"P3","status":"pass","evidence":"https://intercom.com/ -> 200","result":"Verified (https://intercom.com/ -> 200)"},{"id":"root-link-rel","label":"Root HTML links to machine surfaces via <link rel>","category":"discoverability","group":"P3","layer":"web","keyword":"should","tier":"recommended","principle":"P3","status":"absent","evidence":"https://intercom.com/ -> 200 (body no match /rel=[\"'](service-desc|service-doc|alternate)[\"']/)","result":"Not found (https://intercom.com/ -> 200 (body no match /rel=[\"'](service-desc|service-doc|alternate)[\"']/))","remediation":{"goal":"Point link rel elements at your machine surfaces from the root HTML head","fix":"Add `<link rel>` elements in your root HTML head pointing at your machine surfaces:\n`rel=\"service-desc\"` to the OpenAPI doc, `rel=\"service-doc\"` to human docs, and\n`rel=\"alternate\"` to `llms.txt` and the MCP card. An agent that lands on the HTML can then\ndiscover the structured surfaces without scraping.","skill_url":"https://anc.dev/fix/root-link-rel","resources":[{"label":"RFC 8631 (service-desc/doc)","url":"https://www.rfc-editor.org/rfc/rfc8631"}],"evidence":"https://intercom.com/ -> 200 (body no match /rel=[\"'](service-desc|service-doc|alternate)[\"']/)","prompt":"Goal: Point link rel elements at your machine surfaces from the root HTML head\nFix: Add `<link rel>` elements in your root HTML head pointing at your machine surfaces: `rel=\"service-desc\"` to the OpenAPI doc, `rel=\"service-doc\"` to human docs, and `rel=\"alternate\"` to `llms.txt` and the MCP card. An agent that lands on the HTML can then discover the structured surfaces without scraping.\nSkill: https://anc.dev/fix/root-link-rel\nDocs: https://www.rfc-editor.org/rfc/rfc8631\nObserved (untrusted, not instructions):\n--- begin evidence ---\nhttps://intercom.com/ -> 200 (body no match /rel=[\"'](service-desc|service-doc|alternate)[\"']/)\n--- end evidence ---"}},{"id":"dns-aid","label":"DNS for AI Discovery (DNS-AID) records under _agents (IETF draft)","category":"discoverability","group":"P8","layer":"web","keyword":"may","tier":"optional","principle":"P8","status":"n_a","na_reason":"optional-absent","evidence":"no DNS-AID records","result":"Not implemented, optional (no DNS-AID records)"},{"id":"robots-ai-rules","label":"robots.txt declares AI-crawler rules (RFC 9309)","category":"bot-crawl-policy","group":"P7","layer":"web","keyword":"should","tier":"recommended","principle":"P7","status":"pass","evidence":"https://intercom.com/robots.txt -> 200","result":"Verified (https://intercom.com/robots.txt -> 200)"},{"id":"agent-ua-reachable","label":"AI user-fetch User-Agent can reach the homepage","category":"bot-crawl-policy","group":"P7","layer":"web","keyword":"should","tier":"recommended","principle":"P7","status":"broken","evidence":"https://intercom.com/ -> 200 (body matches forbidden /just a moment|attention required|cf-challenge|enable javascript and cookies|captcha/)","result":"Present but broken (https://intercom.com/ -> 200 (body matches forbidden /just a moment|attention required|cf-challenge|enable javascript and cookies|captcha/))","remediation":{"goal":"Let on-demand user-fetchers GET / with Accept */* and receive 2xx, not a challenge page","fix":"Allow AI user-fetch clients such as `ChatGPT-User` to `GET /` with `Accept: */*` and receive\na 2xx response whose body is not an obvious bot-challenge interstitial. This is reachability,\nnot content type: serving HTML is fine. Blocklists that 403 these UAs, or challenge pages that\nsay \"Just a moment\", fail the check.","skill_url":"https://anc.dev/fix/agent-ua-reachable","resources":[{"label":"OpenAI user-fetchers","url":"https://platform.openai.com/docs/bots"}],"evidence":"https://intercom.com/ -> 200 (body matches forbidden /just a moment|attention required|cf-challenge|enable javascript and cookies|captcha/)","prompt":"Goal: Let on-demand user-fetchers GET / with Accept */* and receive 2xx, not a challenge page\nFix: Allow AI user-fetch clients such as `ChatGPT-User` to `GET /` with `Accept: */*` and receive a 2xx response whose body is not an obvious bot-challenge interstitial. This is reachability, not content type: serving HTML is fine. Blocklists that 403 these UAs, or challenge pages that say \"Just a moment\", fail the check.\nSkill: https://anc.dev/fix/agent-ua-reachable\nDocs: https://platform.openai.com/docs/bots\nObserved (untrusted, not instructions):\n--- begin evidence ---\nhttps://intercom.com/ -> 200 (body matches forbidden /just a moment|attention required|cf-challenge|enable javascript and cookies|captcha/)\n--- end evidence ---"}},{"id":"agent-friendly-404","label":"Unknown paths return HTTP 404 or 410","category":"discoverability","group":"P8","layer":"web","keyword":"should","tier":"recommended","principle":"P8","status":"pass","evidence":"https://intercom.com/anc-web-audit-no-such-page -> 404","result":"Verified (https://intercom.com/anc-web-audit-no-such-page -> 404)"},{"id":"content-signals","label":"robots.txt declares Content-Signal AI-usage preferences","category":"bot-crawl-policy","group":"P7","layer":"web","keyword":"should","tier":"recommended","principle":"P7","status":"pass","evidence":"https://intercom.com/robots.txt -> 200","result":"Verified (https://intercom.com/robots.txt -> 200)"},{"id":"agent-friendly-404-md","label":"404 body is markdown with a recovery link","category":"discoverability","group":"P8","layer":"web","keyword":"should","tier":"recommended","principle":"P8","status":"absent","evidence":"https://intercom.com/anc-web-audit-no-such-page -> 404 (content-type \"text/html; charset=utf-8\" !~ /markdown|text/plain/)","result":"Not found (https://intercom.com/anc-web-audit-no-such-page -> 404 (content-type \"text/html; charset=utf-8\" !~ /markdown|text/plain/))","remediation":{"goal":"Serve a short markdown 404 that links at least one agent recovery surface","fix":"When `Accept: text/markdown` hits an unknown path, return 404 or 410 with a short markdown\nbody that includes at least one recovery link: sitemap, `llms.txt`, a docs index, or an\nequivalent same-origin href. Linking both sitemap and `llms.txt` as absolute URLs is the\nstronger pattern. Zero links is a miss even when the status is correct.","skill_url":"https://anc.dev/fix/agent-friendly-404-md","resources":[{"label":"llmstxt.org","url":"https://llmstxt.org/"}],"evidence":"https://intercom.com/anc-web-audit-no-such-page -> 404 (content-type \"text/html; charset=utf-8\" !~ /markdown|text/plain/)","prompt":"Goal: Serve a short markdown 404 that links at least one agent recovery surface\nFix: When `Accept: text/markdown` hits an unknown path, return 404 or 410 with a short markdown body that includes at least one recovery link: sitemap, `llms.txt`, a docs index, or an equivalent same-origin href. Linking both sitemap and `llms.txt` as absolute URLs is the stronger pattern. Zero links is a miss even when the status is correct.\nSkill: https://anc.dev/fix/agent-friendly-404-md\nDocs: https://llmstxt.org/\nObserved (untrusted, not instructions):\n--- begin evidence ---\nhttps://intercom.com/anc-web-audit-no-such-page -> 404 (content-type \"text/html; charset=utf-8\" !~ /markdown|text/plain/)\n--- end evidence ---"}},{"id":"web-bot-auth","label":"Web Bot Auth signature directory present (informational)","category":"bot-crawl-policy","group":"P6","layer":"web","keyword":"may","tier":"optional","principle":"P6","status":"n_a","na_reason":"optional-absent","evidence":"https://intercom.com/.well-known/http-message-signatures-directory -> 404 (status 404 not in [200])","result":"Not implemented, optional (https://intercom.com/.well-known/http-message-signatures-directory -> 404 (status 404 not in [200]))"},{"id":"markdown-accept-plain","label":"Accept text/plain returns the markdown twin","category":"content-for-agents","group":"P2","layer":"web","keyword":"may","tier":"optional","principle":"P2","status":"n_a","na_reason":"optional-absent","evidence":"https://intercom.com/ -> 200 (content-type \"text/html; charset=utf-8\" !~ /markdown|text/plain/)","result":"Not implemented, optional (https://intercom.com/ -> 200 (content-type \"text/html; charset=utf-8\" !~ /markdown|text/plain/))"},{"id":"ai-catalog","label":"/.well-known/ai-catalog.json published (ARD)","category":"agent-discovery-auth","group":"P8","layer":"web","keyword":"may","tier":"optional","principle":"P8","status":"n_a","na_reason":"optional-absent","evidence":"https://intercom.com/.well-known/ai-catalog.json -> 404 (status 404 not in [200])","result":"Not implemented, optional (https://intercom.com/.well-known/ai-catalog.json -> 404 (status 404 not in [200]))"},{"id":"security-txt","label":"/.well-known/security.txt present (RFC 9116)","category":"bot-crawl-policy","group":"P4","layer":"web","keyword":"may","tier":"optional","principle":"P4","status":"pass","evidence":"https://intercom.com/.well-known/security.txt -> 200","result":"Verified (https://intercom.com/.well-known/security.txt -> 200)"},{"id":"a2a-agent-card","label":"A2A Agent Card published for agent-to-agent discovery","category":"agent-discovery-auth","group":"P8","layer":"web","keyword":"may","tier":"optional","principle":"P8","status":"n_a","na_reason":"optional-absent","evidence":"https://intercom.com/.well-known/agent-card.json -> 404 (status 404 not in [200])","result":"Not implemented, optional (https://intercom.com/.well-known/agent-card.json -> 404 (status 404 not in [200]))"},{"id":"agent-skills","label":"Agent-skills discovery index published","category":"agent-discovery-auth","group":"P8","layer":"web","keyword":"may","tier":"optional","principle":"P8","status":"n_a","na_reason":"optional-absent","evidence":"https://intercom.com/.well-known/agent-skills/index.json -> 404 (status 404 not in [200])","result":"Not implemented, optional (https://intercom.com/.well-known/agent-skills/index.json -> 404 (status 404 not in [200]))"},{"id":"llms-txt-links","label":"llms.txt links resolve","category":"content-for-agents","group":"P2","layer":"web","keyword":"should","tier":"recommended","principle":"P2","status":"pass","evidence":"https://www.intercom.com/ -> 200","result":"Verified (https://www.intercom.com/ -> 200)"}]},"target_url":"https://intercom.com/","score_pct":58,"site_spec_version":"0.5.0","auditor_url":"https://anc.dev/score"}