langfuse.com
Langfuse
Open source LLM engineering platform: observability, evals, and prompt management.
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langfuse.com
Open source LLM engineering platform: observability, evals, and prompt management.
Submitted URLs are declarations until checked. Verification inspects published content and does not execute third-party tools.
4 duplicate documentation links
The score measures observable documentation quality. Each component below lists its earned points, exact checks, and source observations. It is not a prediction of AI rankings or citations.
Overall readiness
Confidence: medium· V2
How this score is calculated
round(93.01 ÷ 100 × 100) = 93/100
93.01 points earned out of 100 assessed. All 100 available points were assessed. The checks below show each result. Optional integrations and file size earn no extra points.
Full scoring rules and worked exampleCurrent usable primary file: 25/25.
Current llms.txt retrieval succeeded (HTTP 200); usable text verified.
llms.txt: Documentation sections: Langfuse; Deprecated public API endpoints; Evaluation workflows; Pricing, deployment, and comparisons; Markdown Access; Docs Search API. Derived from headings; source checked 2026-11-03.
Listing updated: . Machine-readable profile (JSON)
{
"schemaVersion": "1.0",
"name": "Langfuse",
"slug": "langfuse",
"website": "https://langfuse.com",
"category": "ai",
"description": "Open source LLM engineering platform: observability, evals, and prompt management.",
"capabilities": [
"llmsTxt documentation"
],
"aiResources": {
"llmsTxt": {
"type": "llmsTxt",
"url": "https://langfuse.com/llms.txt",
"status": "verified",
"available": true,
"httpStatus": 200,
"checkedAt": "2026-11-03T22:14:32.109Z",
"lastSuccessfulAt": "2026-11-03T22:14:32.109Z",
"contentType": "text/plain; charset=utf-8",
"contentSize": 17924,
"estimatedTokens": 4428,
"tokenMethod": "UTF-16 characters / 4 (approximation)",
"contentHash": "4f9a68ee2aff348dee6411206c3438bade8ced1d8a1d6469cd6e390456c7b4db",
"internalLinks": 27,
"externalLinks": 2,
"document": {
"h1Count": 1,
"firstBlockIsH1": true,
"title": "Langfuse",
"usefulTitle": true,
"headingCount": 23,
"uniqueHeadingCount": 23,
"hasSections": true,
"orderedHeadings": true,
"sectionWithContent": true,
"fileListLinks": 27,
"summaryPresent": true,
"contextPresent": false,
"validLinks": 33,
"invalidLinks": 0,
"duplicateLinks": 4,
"descriptiveLinks": 29,
"annotatedLinks": 13
},
"linkHealth": {
"eligibleCount": 29,
"selectedCount": 5,
"sampledCount": 5,
"working": 4,
"broken": 0,
"unknown": 1,
"checkedAt": "2026-11-03T22:14:32.206Z",
"sourceHash": "4f9a68ee2aff348dee6411206c3438bade8ced1d8a1d6469cd6e390456c7b4db",
"method": "deterministic sample, at most 5 URLs, at most 2 concurrent hosts, 15s budget",
"results": [
{
"url": "https://langfuse.com/docs/evaluation/scores/score-analytics.md",
"httpStatus": 200,
"checkedAt": "2026-11-03T22:14:32.206Z",
"attempted": true,
"status": "working",
"reason": "http_success"
},
{
"url": "https://langfuse.com/resources/engineering/evaluate-existing-application.md",
"httpStatus": 200,
"checkedAt": "2026-11-03T22:14:32.206Z",
"attempted": true,
"status": "working",
"reason": "http_success"
},
{
"url": "https://langfuse.com/compare/arize-phoenix.md",
"httpStatus": 200,
"checkedAt": "2026-11-03T22:14:32.206Z",
"attempted": true,
"status": "working",
"reason": "http_success"
},
{
"url": "https://langfuse.com/compare/sentry.md",
"httpStatus": 200,
"checkedAt": "2026-11-03T22:14:32.206Z",
"attempted": true,
"status": "working",
"reason": "http_success"
},
{
"url": "https://github.com/langfuse/langfuse",
"status": "unknown",
"httpStatus": null,
"reason": "oversized",
"attempted": true,
"checkedAt": "2026-11-03T22:14:32.206Z"
}
]
},
"headings": [
"Langfuse",
"Deprecated public API endpoints",
"Evaluation workflows",
"Pricing, deployment, and comparisons",
"Markdown Access",
"Docs Search API",
"Langfuse Docs MCP Server",
"Langfuse Skill for AI Coding Agents",
"Tracing Best Practices",
"Docs",
"Integrations",
"Optional: Self-Hosting"
],
"warnings": [
"4 duplicate documentation links"
],
"summary": "Documentation sections: Langfuse; Deprecated public API endpoints; Evaluation workflows; Pricing, deployment, and comparisons; Markdown Access; Docs Search API.",
"summarySourceHash": "4f9a68ee2aff348dee6411206c3438bade8ced1d8a1d6469cd6e390456c7b4db",
"processingVersion": "2.0",
"method": "markdown-ast-analysis"
},
"llmsFullTxt": null,
"webmcp": null
},
"readiness": {
"score": 93,
"version": "2.0",
"confidence": "medium",
"components": [
{
"name": "availability",
"weight": 25,
"assessedWeight": 25,
"points": 25,
"rules": [
{
"id": "current_access",
"label": "Current usable primary file",
"weight": 25,
"observation": "Current llms.txt retrieval succeeded (HTTP 200); usable text verified.",
"points": 25
}
],
"explanation": "Current usable primary file: 25/25."
},
{
"name": "structure",
"weight": 25,
"assessedWeight": 25,
"points": 25,
"rules": [
{
"id": "title",
"label": "One project H1 at the beginning",
"weight": 10,
"observation": "1 H1 heading(s); starts with H1: yes.",
"points": 10
},
{
"id": "sections",
"label": "Coherent content sections",
"weight": 5,
"observation": "H2 with content: yes; no heading-level jumps: yes.",
"points": 5
},
{
"id": "file_lists",
"label": "Documentation links organized in lists",
"weight": 5,
"observation": "27 valid link occurrence(s) inside Markdown lists.",
"points": 5
},
{
"id": "heading_uniqueness",
"label": "Non-repeated headings",
"weight": 5,
"observation": "23 unique heading(s) out of 23; code examples are excluded.",
"points": 5
}
],
"explanation": "One project H1 at the beginning: 10/10. Coherent content sections: 5/5. Documentation links organized in lists: 5/5. Non-repeated headings: 5/5."
},
{
"name": "links",
"weight": 25,
"assessedWeight": 25,
"points": 23.01,
"rules": [
{
"id": "link_syntax",
"label": "Resolvable HTTP(S) link syntax",
"weight": 5,
"observation": "33 valid URL occurrence(s), 0 malformed, unsupported or unresolved.",
"points": 5
},
{
"id": "link_uniqueness",
"label": "Unique documentation destinations",
"weight": 5,
"observation": "29 unique destination(s) from 33 valid occurrence(s).",
"points": 4.39
},
{
"id": "link_labels",
"label": "Descriptive link labels",
"weight": 2.5,
"observation": "29 of 29 unique links have non-placeholder labels. This is a text heuristic, not a semantic guarantee.",
"points": 2.5
},
{
"id": "link_notes",
"label": "Context beside file links",
"weight": 2.5,
"observation": "13 of 29 unique links have notes beside a Markdown list link.",
"points": 1.12
},
{
"id": "link_health",
"label": "Sampled destination accessibility",
"weight": 10,
"observation": "5 of 29 destinations sampled: 4 working, 0 confirmed 404/410, 1 unknown. Only working and confirmed-broken results enter this fraction.",
"points": 10
}
],
"explanation": "Resolvable HTTP(S) link syntax: 5/5. Unique documentation destinations: 4.39/5. Descriptive link labels: 2.5/2.5. Context beside file links: 1.12/2.5. Sampled destination accessibility: 10/10."
},
{
"name": "confidence",
"weight": 15,
"assessedWeight": 15,
"points": 15,
"rules": [
{
"id": "verification_age",
"label": "Age of last successful verification",
"weight": 10,
"observation": "Last success: 2026-11-03T22:14:32.109Z. Full points through day 8 (7-day schedule plus 1-day grace), 60% through day 30, 20% thereafter or for an unknown date.",
"points": 10
},
{
"id": "latest_success",
"label": "Latest primary check succeeded",
"weight": 5,
"observation": "Latest primary verification succeeded.",
"points": 5
}
],
"explanation": "Age of last successful verification: 10/10. Latest primary check succeeded: 5/5."
},
{
"name": "metadata",
"weight": 10,
"assessedWeight": 10,
"points": 5,
"rules": [
{
"id": "summary",
"label": "Useful summary blockquote",
"weight": 5,
"observation": "A blockquote before the first H2 with at least 20 non-whitespace characters and no placeholder-only text.",
"points": 5
},
{
"id": "context",
"label": "Useful introductory context",
"weight": 5,
"observation": "An introductory paragraph before the first H2 with at least 20 non-whitespace characters and no placeholder-only text. Listing form fields do not earn these points.",
"points": 0
}
],
"explanation": "Useful summary blockquote: 5/5. Useful introductory context: 0/5."
}
],
"earnedPoints": 93.01,
"assessedWeight": 100,
"availableWeight": 100,
"provisional": false,
"calculatedAt": "2026-11-03T22:14:33.279Z",
"lastVerifiedAt": "2026-11-03T22:14:32.109Z",
"evidence": {
"sourceUrl": "https://langfuse.com/llms.txt",
"contentHash": "4f9a68ee2aff348dee6411206c3438bade8ced1d8a1d6469cd6e390456c7b4db",
"processingVersion": "2.0",
"retrievedAt": "2026-11-03T22:14:32.109Z"
},
"linkSampling": {
"eligibleCount": 29,
"selectedCount": 5,
"sampledCount": 5,
"working": 4,
"broken": 0,
"unknown": 1,
"checkedAt": "2026-11-03T22:14:32.206Z",
"sourceHash": "4f9a68ee2aff348dee6411206c3438bade8ced1d8a1d6469cd6e390456c7b4db",
"method": "deterministic sample, at most 5 URLs, at most 2 concurrent hosts, 15s budget",
"results": [
{
"url": "https://langfuse.com/docs/evaluation/scores/score-analytics.md",
"httpStatus": 200,
"checkedAt": "2026-11-03T22:14:32.206Z",
"attempted": true,
"status": "working",
"reason": "http_success"
},
{
"url": "https://langfuse.com/resources/engineering/evaluate-existing-application.md",
"httpStatus": 200,
"checkedAt": "2026-11-03T22:14:32.206Z",
"attempted": true,
"status": "working",
"reason": "http_success"
},
{
"url": "https://langfuse.com/compare/arize-phoenix.md",
"httpStatus": 200,
"checkedAt": "2026-11-03T22:14:32.206Z",
"attempted": true,
"status": "working",
"reason": "http_success"
},
{
"url": "https://langfuse.com/compare/sentry.md",
"httpStatus": 200,
"checkedAt": "2026-11-03T22:14:32.206Z",
"attempted": true,
"status": "working",
"reason": "http_success"
},
{
"url": "https://github.com/langfuse/langfuse",
"status": "unknown",
"httpStatus": null,
"reason": "oversized",
"attempted": true,
"checkedAt": "2026-11-03T22:14:32.206Z"
}
]
},
"warnings": [
"This measures observable documentation, not model rankings or citation probability.",
"H1 is the only required section in the llms.txt proposal. Other checks are LLMSList quality preferences; missing optional sections do not make usable text invalid.",
"Destination accessibility covers a sample of 5 out of 29 unique links, not the entire website."
]
},
"updatedAt": "2026-11-03T22:14:33.279Z"
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One project H1 at the beginning: 10/10. Coherent content sections: 5/5. Documentation links organized in lists: 5/5. Non-repeated headings: 5/5.
1 H1 heading(s); starts with H1: yes.
H2 with content: yes; no heading-level jumps: yes.
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5 of 29 destinations sampled: 4 working, 0 confirmed 404/410, 1 unknown. Only working and confirmed-broken results enter this fraction.
Use unique HTTP(S) documentation links with descriptive labels and short notes beside list links. Fix confirmed HTTP 404/410 destinations in the sample below. Access-denied, rate-limited or timed-out checks are unknown, not confirmed broken. Request a recheck after changes; more links alone earn no extra points.
Age of last successful verification: 10/10. Latest primary check succeeded: 5/5.
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80–100%50–79%0–49%Gray: not assessed
Component colors use earned points ÷ assessed points. Unmeasured checks are excluded from the assessed maximum. Model v2.0. Calculated 2026-11-03 22:14:33 UTC.
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Sample checked: 2026-11-03 22:14:32 UTC · Source snapshot: 4f9a68ee2aff
Destination responded successfully
Destination responded successfully
Destination responded successfully
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Response exceeded the sample size limit
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