github.com
A+ (92/100) Open to Search & TrainingGitHub · Change is constant. GitHub keeps you ahead. · GitHub · GitHub
| AI & /llms.txt Readiness | Signal-to-Noise Ratio | Token Savings via /llms.txt | Network TTFB | TLS & HTTP Security | DNS & Edge Stack |
|---|---|---|---|---|---|
| 84/100 | 0.9% (1,159 / 131,504 tok) | -94.6% fewer tokens | 35 ms (98/100) | 93/100 | GitHub Pages (Custom SSR / Static) |
Web-to-Token Efficiency & Agent Ingestion Cost
~4 bytes/token UTF-8 heuristic| Ingestion Source | Payload | Est. Tokens | Cost / 1k Reads (Flash $0.35) | Cost / 1k Reads (Pro $1.25) |
|---|---|---|---|---|
Raw HTML DOM (GET /) |
513.7 KB | 131,504 | $46.0264 | $164.3800 |
| Stripped Readable Text | 4.5 KB | 1,159 | $0.4057 | $1.4488 |
/llms.txt Manifest |
28.0 KB | 7,165 | $2.5078 | $8.9563 |
/llms.txt Spec Linter & Agent Endpoint Probe
Status: Spec Compliant
| GET /llms.txt | HTTP 200 · 28,658 bytes (~7,165 tokens · 178 lines) |
| Spec Check: # H1 Title | Pass ("GitHub") |
| Spec Check: > Summary | Pass ("GitHub is a developer platform for building, shipping, and maintaining software. It provides cloud-based Git repository hosting, CI/CD via GitHub Actions, project management with I") |
| ## H2 Sections & Links | 12 sections · 117 canonical markdown links |
| GET /llms-full.txt | HTTP 200 · 28,658 bytes (~7,165 tokens) |
| GET /.well-known/mcp.json | Not advertised |
| JSON-LD Schema Entities | None detected in initial HTML |
# GitHub > GitHub is a developer platform for building, shipping, and maintaining software. It provides cloud-based Git repository hosting, CI/CD via GitHub Actions, project management with Issues and Projects, code review via pull requests, AI-powered development with GitHub Copilot, and APIs (REST and GraphQL) for automation and integration. ## How to use To retrieve full article content, page lists, or search results programmatically, please use the APIs below. To find a specific article,
AI Crawler /robots.txt Access Matrix
Open to Search & Training
| User-Agent Token | Purpose / Operator | Effective Directive |
|---|---|---|
| OAI-SearchBot | ChatGPT Search Citations | Allow: / |
| PerplexityBot | Perplexity Answer Citations | Allow: / |
| ChatGPT-User | Live User Agent Browsing | Allow: / |
| Claude-SearchBot | Anthropic Search Grounding | Allow: / |
| GPTBot | Foundation Model Training | Allow: / |
| ClaudeBot | Foundation Model Training | Allow: / |
| Google-Extended | Gemini Training Control | Allow: / |
| Applebot-Extended | Apple Intelligence Training | Allow: / |
| Meta-ExternalAgent | Llama Training & Indexing | Allow: / |
| CCBot | Open Dataset Training Corpus | Allow: / |
HTTP Response & Handshake Timing
GET https://github.com/| DNS Lookup | 1 ms | HTML Document | 513.7 KB |
| TCP Connect | 10 ms | Script Tags | 12 |
| TLS Handshake | 0 ms | Stylesheets | 39 |
| Time to First Byte (TTFB) | 35 ms | Images (with alt) | 7 / 21 |
| Total Transfer | 46 ms | HTTP/3 (Alt-Svc) | Not advertised |
Edge Network & Application Stack
Header & DOM Signatures| Edge / Reverse Proxy | GitHub Pages |
| Application Framework | Custom SSR / Static |
| Server Header | github.com |
| Mail Provider (MX) | Microsoft 365 |
| Telemetry Signatures | Server-Side / None |
| TXT Verifications | Anthropic Verified, Google Search Console, Microsoft Entra, Stripe Verified, Atlassian, OpenAI Domain Verified |
TLS Certificate & HTTP Security Policy
Port 443 X.509| Certificate Issuer | Sectigo Limited (74 days remaining) |
| Strict-Transport-Security | Present |
| Content-Security-Policy | Present |
| X-Content-Type-Options | Present |
| X-Frame-Options | Present |
| Referrer-Policy | Present |
| Permissions-Policy | Not set |
| SPF / DMARC Policy | SPF: Yes · DMARC: Yes |
Authoritative DNS & Document Head
A / AAAA / NS / Canonical| A (IPv4) | 20.207.73.82 |
| AAAA (IPv6) | None |
| NS (Nameservers) | ns-1283.awsdns-32.org, ns-520.awsdns-01.net, dns3.p08.nsone.net, dns1.p08.nsone.net, dns4.p08.nsone.net, ns-421.awsdns-52.com |
| HTML Title (70c) | GitHub · Change is constant. GitHub keeps you ahead. · GitHub · GitHub |
| /sitemap.xml | Not found |
Hosted /llms.txt Mirror & Status Badge
Platform Setup Guide →
<head> Tag (for Shopify, Webflow, Framer, Wix, Squarespace & WordPress):
Technical Synthesis & Agentic Ingestion Analysis: github.com
Automated Engineering Assessment1. HTML-to-Token Efficiency & LLM Context Window Cost
An unauthenticated HTTPS GET request to https://github.com/ returns an initial HTML payload of 513.7 KB, corresponding to approximately 131,504 UTF-8 tokens when ingested raw by an AI coding agent, retrieval pipeline, or headless browser. After stripping inline <script>, <style>, <svg>, and DOM markup tags, the human-readable text footprint measures 1,159 tokens (4.5 KB)—yielding an HTML Signal-to-Noise Ratio of 0.9%.
Because github.com publishes a valid /llms.txt manifest (measuring 7,165 tokens across 178 lines), AI retrieval agents that read /llms.txt instead of scraping the raw DOM reduce token consumption by 94.6%—cutting 1,000-read inference input costs from $164.3800 to $8.9563 at frontier model rates ($1.25/1M tokens), or $2.5078 on Gemini 4 Hydrogen ($0.35/1M).
2. Indexed Structure Inside github.com/llms.txt
Sitecube’s specification linter verified 12 H2 section headings and 117 Markdown links inside https://github.com/llms.txt under the primary heading "GitHub".
Documented sections include: How to use</code>, <code>Building with GitHub, for coding agents and automation</code>, <code>GitHub Copilot</code>, <code>Authentication</code>, <code>Get started</code>, <code>Account and profile</code>, <code>GitHub Pages</code>, <code>GitHub Actions.
Key canonical endpoints referenced in the manifest include
Versions API (https://docs.github.com/api/pagelist/versions), Languages API (https://docs.github.com/api/pagelist/languages), Page List API (https://docs.github.com/api/pagelist/en/free-pro-team@latest), Article API (https://docs.github.com/api/article), Article Body API (https://docs.github.com/api/article/body).
3. Edge Delivery, TLS Handshake & Security Header Assessment
Traffic for github.com resolves to 20.207.73.82 via GitHub Pages running Custom SSR / Static, achieving a measured Time to First Byte (TTFB) of 35 ms (DNS lookup: 1 ms, TCP connect: 10 ms, TLS handshake: 0 ms). The port 443 TLS certificate is issued by Sectigo Limited with 74 days remaining before expiration (valid through 2027-01-27). Outbound email authentication via SPF is present and DMARC (_dmarc.github.com) is enforced.
Comparable Hosts in Web-to-Token & /llms.txt Registry
Full Index (26 hosts) →| Host | Rating | /llms.txt | HTML Tokens | Text Tokens | Signal % | Crawler Posture | TTFB |
|---|---|---|---|---|---|---|---|
| sitecube.com | A+ 98 | 1,600 tok | 11,832 | 1,132 | 9.6% | Open to Search & Training | 99 ms |
| cloudflare.com | A+ 96 | 4,294 tok | 333,631 | 471 | 0.1% | Open to Search & Training | 291 ms |
| trendyflash.com | A+ 95 | 2,987 tok | 12,123 | 1,660 | 13.7% | Open to Search & Training | 112 ms |
| multifactor.com | A+ 94 | 656 tok | 98,275 | 673 | 0.7% | Open to Search & Training | 97 ms |
| github.com | A+ 92 | 7,165 tok | 131,504 | 1,159 | 0.9% | Open to Search & Training | 35 ms |
| vercel.com | A+ 92 | 1,385 tok | 149,859 | 889 | 0.6% | Open to Search & Training | 53 ms |
| aiimpacted.org | A+ 92 | 971 tok | 17,598 | 3,568 | 20.3% | Open to Search & Training | 55 ms |
| tierones.io | A+ 92 | 481 tok | 3,744 | 693 | 18.5% | Open to Search & Training | 95 ms |
| cloq.com | A 91 | 1,169 tok | 2,109 | 690 | 32.7% | Open to Search & Training | 51 ms |
| supabase.com | A 89 | 879 tok | 337,513 | 1,905 | 0.6% | Open to Search & Training | 48 ms |
| dosefacts.org | A 89 | 10,936 tok | 29,008 | 7,291 | 25.1% | Open to Search & Training | 335 ms |
| postman.com | A 89 | 5,375 tok | 118,892 | 11,040 | 9.3% | Open to Search & Training | 947 ms |