# Linkagent > Linkagent is open source AI internal linking software (AGPL-3.0, self-hostable). It crawls a website, builds a topic model and in-text link graph, scores missing link opportunities, and ships approved links through a 2 KB script, a WordPress plugin, or a JSON API. Anchor text is never generated: every anchor is an exact phrase already present in the source sentence. Key facts: - Works on any platform that serves HTML (WordPress, Next.js, Shopify, Webflow, custom CMS). - Runs fully without an AI key; an optional Claude review pass refines top suggestions. - Link budgets: about 1 new link per 250 words, max 8 per page, max 12 new inbound links per target, no anchor phrase above roughly a third of a target's profile. - Only in-text (contextual) links are counted; navigation and footer links are excluded from the graph. - Every link is human-approved; decisions persist across scheduled re-crawls (monthly, weekly, or daily). - Pricing: hosted Starter $19/month, Pro $49/month; self-hosting is free (AGPL-3.0). The site scan is free and requires no account: https://linkagent.app - Source code: https://github.com/mehicned/linkagent ## Product - [Linkagent](https://linkagent.app): Open source AI internal linking software. Crawls a site, finds missing internal links, and ships them via a 2 KB script, WordPress plugin, or API. Anchors are never invented; they always come from text already on the page. - [Internal linking tool](https://linkagent.app/internal-linking-tool): The full tool: audit, scored suggestions, one-click shipping, and scheduled maintenance on any platform. - [Free internal link checker](https://linkagent.app/internal-link-checker): Free scan of any site, no account needed. Returns missing internal links with real anchor suggestions in about 20 seconds. - [Internal link audit](https://linkagent.app/internal-link-audit): Crawl-based audit: orphan pages, click depth, anchor health, and missing topical links, each converted into a shippable fix. - [AI internal linking](https://linkagent.app/ai-internal-linking): How the AI layer works: semantic matching plus anchors validated as exact substrings of existing sentences. Runs without an AI key. - [Internal linking AI agent](https://linkagent.app/internal-linking-ai-agent): The closed loop: crawl, score, review, ship, re-crawl on a schedule, with human approval on every link. - [Automated internal linking](https://linkagent.app/automated-internal-linking): Automation with editorial guardrails: about one link per 250 words, capped inbound links, enforced anchor variety. - [WordPress internal linking plugin](https://linkagent.app/wordpress-internal-linking-plugin): A few-kilobyte plugin that injects approved links at render time. Post content in the database is never modified. - [Open source and self-hosting](https://linkagent.app/open-source-internal-linking): AGPL-3.0 platform, MIT embed script. The only open source, self-hostable tool in the internal linking category. - [Pricing](https://linkagent.app/pricing): Hosted: Starter $19/month (weekly re-crawls, 1 site), Pro $49/month (daily re-crawls, up to 10 sites). Self-hosting is free forever under AGPL-3.0. - [Alternatives and comparisons](https://linkagent.app/alternatives): Honest feature-by-feature comparisons against Link Whisper, LinkBoss, LinkStorm, Internal Link Juicer, and Linkilo. ## Guides - [How Many Internal Links Per Page? A Real Answer](https://linkagent.app/blog/how-many-internal-links-per-page): How many internal links per page is right? Where the 100-link myth came from, a defensible density rule, and when more links are fine. - [How to Find Internal Link Opportunities (4 Ways)](https://linkagent.app/blog/how-to-find-internal-link-opportunities): Four ways to find internal link opportunities: Google site: searches, Ahrefs and Semrush reports, GSC queries, and automated topic-based crawling. - [Internal Links in HTML: Syntax, Anchors, Jump Links](https://linkagent.app/blog/html-internal-links): The complete HTML internal link reference: syntax, relative vs absolute paths, jump links with id fragments, and accessible link text. - [Internal Link Building: The Cheapest Links You'll Ever Get](https://linkagent.app/blog/internal-link-building): Internal link building gets you relevant, controllable links for free. A backlink-campaign-grade process: find sources, pick anchors, track results. - [Internal Link Mapping: See Your Site the Way Google Does](https://linkagent.app/blog/internal-link-mapping): Internal link mapping shows how authority flows through your site. Build a link map, read its hubs and islands, and fix what it reveals. - [Internal Linking Best Practices (What Still Works)](https://linkagent.app/blog/internal-linking-best-practices): Ten internal linking best practices that still work in 2026, plus the outdated tactics like nofollow sculpting you should finally drop. - [Internal Linking Examples Worth Copying](https://linkagent.app/blog/internal-linking-examples): Six internal linking examples with before/after sentences: guide-to-cluster, blog-to-product, docs cross-refs, glossary links, and more. - [Internal Linking for Ecommerce: Beyond the Mega Menu](https://linkagent.app/blog/internal-linking-for-ecommerce): Ecommerce internal linking that works: category-to-product flows, blog-to-category links, faceted navigation traps, and out-of-stock handling. - [Internal Linking Strategy: A Framework That Scales](https://linkagent.app/blog/internal-linking-strategy): Build an internal linking strategy that scales: audit, prioritize money pages, implement with rules, and measure impact in Google Search Console. - [How to Add Internal Links in WordPress (3 Ways)](https://linkagent.app/blog/internal-linking-wordpress): Add internal links in WordPress three ways: manually in Gutenberg or Classic, with Yoast or Rank Math suggestions, or with automation plugins. - [Internal Linking: The Complete SEO Guide](https://linkagent.app/blog/internal-linking): What internal links are, why they move rankings, and exactly how to audit, build, and maintain internal linking that compounds. The complete guide. - [Internal Links in Markdown: Every Syntax That Works](https://linkagent.app/blog/markdown-internal-links): Markdown internal links across GitHub, Obsidian, Notion, MkDocs, and Docusaurus: inline syntax, heading anchors, wikilinks, and the gotchas. - [Orphan Pages: How to Find and Fix Them](https://linkagent.app/blog/orphan-pages): Orphan pages get no internal links, so they get no equity and weak rankings. How to find them with GSC, crawlers, and logs, and fix them for good. ## Concepts - [What Is an AI SEO Agent? (And What It Isn't)](https://linkagent.app/blog/ai-seo-agents): An AI SEO agent perceives, decides, acts, and verifies in a loop. Here's what that means, what's realistic today, and what to be skeptical of. - [Anchor Text Optimization Without Over-Optimizing](https://linkagent.app/blog/anchor-text-optimization): Audit your anchor distribution, fix generic anchors, and apply anchor text optimization rules that improve relevance without tripping filters. - [Anchor Text: A Complete Guide for SEO](https://linkagent.app/blog/anchor-text): What anchor text is, the six types that matter, how Google reads anchors, and how to write internal anchors without over-optimizing. - [Contextual Links: Why In-Text Beats Navigation](https://linkagent.app/blog/contextual-links): Contextual links: links inside your prose. They carry more signal than nav or footer links. The reasoning, the reasonable-surfer model, and ratios. - [Internal Link Structure: Models That Actually Work](https://linkagent.app/blog/internal-link-structure): Compare internal link structure models (flat, deep, hub-and-spoke, pyramid, mesh) and pick the right one for your blog, store, SaaS, or docs. - [Internal vs External Links: Differences That Matter](https://linkagent.app/blog/internal-vs-external-links): Internal vs external links compared: how each affects rankings, anchors, equity, and control, plus a table of the practical differences. - [Link Equity: How Authority Flows Through Internal Links](https://linkagent.app/blog/link-equity): Link equity explained: what PageRank actually was, how internal links redistribute authority, dilution myths, and moves that concentrate it. - [Nofollow on Internal Links: Almost Always a Mistake](https://linkagent.app/blog/nofollow-internal-links): Nofollow internal links burn equity instead of saving it. Why PageRank sculpting died in 2009, the rare valid cases, and how to audit for accidents. - [Pillar Pages That Rank: Anatomy and Examples](https://linkagent.app/blog/pillar-pages): What a pillar page actually is, how it differs from a landing page or guide, the internal linking anatomy that makes it work, and how to maintain it. - [SEO Silos: Structure Without the Straitjacket](https://linkagent.app/blog/seo-siloing): SEO siloing explained: the classic theory, why never-cross-link rules are outdated, and how soft silos and topic clusters do the job better. - [Topical Authority: How Sites Earn It](https://linkagent.app/blog/seo-topical-authority): Topical authority is coverage plus coherence: covering a topic completely and connecting that coverage with internal links search engines can read. - [Site Structure for SEO: A Practical Blueprint](https://linkagent.app/blog/site-structure-seo): Site structure for SEO explained: URL hierarchy vs link hierarchy, navigation vs contextual links, breadcrumbs, pagination, and crawl budget. - [Topic Clusters: How to Build Them Properly](https://linkagent.app/blog/topic-clusters): Topic clusters work only when the links exist. The hub-and-spoke model, the linking rules that make it real, and the failure that breaks most clusters. ## Tools & comparisons - [Best AI SEO Tools in 2026: What's Real vs Hype](https://linkagent.app/blog/best-ai-seo-tools): A category-by-category look at AI SEO tools: where AI genuinely helps, where it's marketing fluff, and how to evaluate claims before buying. - [The 7 Best Internal Linking Tools in 2026 (Tested)](https://linkagent.app/blog/best-internal-linking-tools): Seven internal linking tools compared on platform support, approach, and honesty about what they actually do. Includes an open-source option. - [SEO Automation: What to Automate, What Never To](https://linkagent.app/blog/seo-automation-tools): A practical framework for SEO automation: automate crawling, monitoring, and link maintenance; never strategy, quality judgment, or final approval. ## Optional - [Full article text](https://linkagent.app/llms-full.txt): every guide above as plain markdown in one file - [Sitemap](https://linkagent.app/sitemap.xml) - [RSS feed](https://linkagent.app/feed.xml)