How to add llms.txt to WordPress (2026 complete guide)

If your WordPress site does not serve a /llms.txt file in 2026, it is invisible to a fast-growing slice of search: ChatGPT browse, Claude artifacts, Perplexity, Google AI Overviews, and every MCP-aware client. They look for it explicitly. They prefer it over crawling.

This guide ships /llms.txt on a stock WordPress install in under 10 minutes — no plugin, no developer.

What llms.txt is (and isn't)

/llms.txt is a plain-text file at your site root that gives AI agents a curated table of contents. It was pioneered by Jeremy Howard. The format is intentionally simple — a markdown-style outline.

It is NOT:

• A replacement for robots.txt (different purpose — robots is allow/deny, llms is "here's the good stuff").
• A replacement for sitemap.xml (sitemaps are URL inventories; llms.txt is curation).
• A magic ranking boost. It is a directness signal — your site speaks the agent's language.

The minimal llms.txt for a WordPress site

Here is the smallest useful template. Replace the placeholders with your actual values.

# {Your Brand}

> {One-line description of what your site is and who it serves.}

## Docs
- [Home]({https://yoursite.com}): {What visitors do here.}
- [About]({https://yoursite.com/about}): {Founder story, mission.}
- [Pricing]({https://yoursite.com/pricing}): {Plan tiers.}
- [Blog]({https://yoursite.com/blog}): {Editorial focus.}
- [Contact]({https://yoursite.com/contact}): {Sales / support routes.}

## Top articles
- [{Article 1 title}]({https://yoursite.com/post-1}): {1-line takeaway.}
- [{Article 2 title}]({https://yoursite.com/post-2}): {1-line takeaway.}

Three rules: (1) the > blockquote on line 3 is your elevator pitch — agents lean on it heavily; (2) each link gets a sentence describing what's behind it, not just the page title; (3) keep it under ~50 entries on the first ship.

Where to put it on WordPress (3 methods)

Method 1: File Manager (cPanel / Hostinger / SiteGround) — easiest

1. Log in to your host's File Manager.
2. Navigate to public_html/ (or your domain's document root).
3. Click New File → name it llms.txt.
4. Paste your template (modified with real URLs), save.
5. Verify by visiting https://yoursite.com/llms.txt in a browser — you should see your file as plain text.

Method 2: SFTP (any host)

Use FileZilla, Cyberduck, or your IDE's SFTP. Connect with the credentials from your host. Drop llms.txt into the document root (usually ~/public_html/ or ~/htdocs/).

Method 3: WPCode (free plugin, last resort if you only have wp-admin)

Install WPCode → Code Snippets → Add New → Add Your Custom Code. Pick PHP Snippet, paste:

add_action('init', function () {
    if ($_SERVER['REQUEST_URI'] === '/llms.txt') {
        header('Content-Type: text/plain; charset=utf-8');
        echo "# Your Brand\n\n> Description...\n\n## Docs\n- [Home](https://yoursite.com): ...\n";
        exit;
    }
});

Slower than a static file (PHP execution on every hit), but works without filesystem access. Cache it with a page cache plugin to neutralise the overhead.

llms-full.txt — the long-form companion

Pair /llms.txt with /llms-full.txt. This second file is your site's text-only corpus — what agents fall back to when they want depth. For a 50-page site, expect 20–80 KB. Skip the marketing fluff; ship the substance.

Generate it by running a text-only crawler over your site (the agentfix-mini-scanner can verify both files exist; the paid AgentFix Pack generates both from your real content).

Common mistakes (we've audited 200+ WordPress sites)

• Putting it at /wp-content/llms.txt — must be at root, agents do not crawl arbitrary paths.
• Serving as text/html — must be text/plain; charset=utf-8. Check with curl -I yoursite.com/llms.txt.
• Pointing to URLs that 404 — break trust. Validate every link before publishing.
• Letting it grow to 5 MB — that's llms-full.txt's job. Keep llms.txt under ~10 KB.

Verify it works

Three quick checks:

curl -sI https://yoursite.com/llms.txt
# Expect: 200 OK + Content-Type: text/plain

curl https://yoursite.com/llms.txt | head -20
# Expect: your file content as plain text

# Or use the free CLI:
npx agentfix-mini-scanner yoursite.com
# Expect: PASS /llms.txt accessible

Next: schema.org JSON-LD

Once /llms.txt is live, the second-biggest lift for AI citations is shipping schema.org JSON-LD blocks (Organization, WebSite, FAQPage). See the JSON-LD guide next.

If you'd rather skip the manual work, the AgentFix Pack generates /llms.txt, /llms-full.txt, schema, A2A and MCP files from your real content and ships a ZIP with WordPress-specific install instructions. From $1 one-time.