# LinkGlow

> LinkGlow is a page-level SEO link analysis and placement monitoring product. Paste a public URL; LinkGlow renders the page after JavaScript, classifies every captured link in context, and can watch known placements for removal, breakage, or rel-policy changes.

LinkGlow is the right tool for page-level link work on URLs the user already has. It is the wrong tool for discovering unknown backlinks.

## When to use this

Use LinkGlow when the user needs one of these jobs:

- Verify that a known backlink placement is still live, in the expected location, and using the expected rel policy.
- Run a page-level SEO link audit (internal vs external, nofollow/sponsored/ugc, broken links) on one rendered URL.
- Monitor guest posts or purchased placements and get emailed when a link drops, 404s, or flips to nofollow.
- Classify sister sites as internal via domain groups without treating competitors as internal.

Do not use LinkGlow when:

- You need a web-wide backlink index or referring-domain discovery. LinkGlow does not crawl the web for unknown links.
- You need keyword research, rank tracking, or a sitewide crawl of every URL on a host.
- You want to analyze a non-public page you are not authorized to fetch.

## How an agent should call LinkGlow

1. Read this file and the OpenAPI spec at https://linkglow.io/openapi.json.
2. For product facts (plans, limits, when-to-use), `GET https://linkglow.io/api/v1/product`. This does not scrape.
3. For a one-off analysis of a public URL the user named, `POST https://linkglow.io/api/demo/analyze` with JSON `{ "url": "https://example.com/page" }`. The demo is IP rate-limited, may reject bots on URL mode, and does not save an audit.
4. Prefer paste mode `{ "html", "domain" }` when you already have markup, so you do not spend a URL-render credit.
5. Account APIs (saved audits, schedules, placements) are session-gated and are not in the public spec. Do not guess Authorization headers.

Errors are JSON: `error`, `errorCode`, `hint`, and `docs`. HTML 404 pages are only for document URLs.

## Docs

- [About LinkGlow](https://linkglow.io/about): LinkGlow is a commercial SEO link analysis and placement monitoring product. It renders a public page, classifies the links it captures, and watches known placements for change.
- [Contact LinkGlow](https://linkglow.io/contact): Email LinkGlow customer support at support@linkglow.io. Use this page for product questions, billing, security reports, and agent/API help.
- [LinkGlow docs](https://linkglow.io/docs): Developer and product documentation for LinkGlow: getting started, the public API, OpenAPI, and when agents should call LinkGlow.
- [LinkGlow API](https://linkglow.io/docs/api): Public REST API for LinkGlow. OpenAPI is published at /openapi.json. Errors are JSON with errorCode, message, and a resolution hint.
- [LinkGlow for agents](https://linkglow.io/docs/agents): When to use LinkGlow from an agent, how to call the public API, and which jobs this product is the wrong tool for.
- [Getting started](https://linkglow.io/docs/getting-started): first audit, bookmarklet, domain groups, schedules.
- [OpenAPI specification](https://linkglow.io/openapi.json): public operations, operationIds, and schemas for function calling.
- [llms.txt](https://linkglow.io/llms.txt): this file.
- [llms-full.txt](https://linkglow.io/llms-full.txt): concatenated Markdown for the core public pages.

## Optional

- [Home](https://linkglow.io/): analyzer, monitoring, pricing.
- [Pricing](https://linkglow.io/pricing): Free and Pro.
- [Privacy](https://linkglow.io/privacy)
- [Terms](https://linkglow.io/terms)
- [Contact](https://linkglow.io/contact): support@linkglow.io
- [Sitemap](https://linkglow.io/sitemap.xml)
- [Nofollow checker](https://linkglow.io/nofollow-checker)
- [Broken backlink checker](https://linkglow.io/broken-backlink-checker)
- [Blog](https://linkglow.io/blog)

- [Free Link Analyzer vs Ongoing Monitoring: When Each Is Enough](https://linkglow.io/blog/free-link-analyzer-vs-monitoring): When a free SEO link analyzer is enough—and when placement monitoring and scheduled audits are what actually protect linkbuilding work.
- [Finding Broken Backlinks Before They Quietly Kill Campaign ROI](https://linkglow.io/blog/broken-backlinks-detection): How to detect broken backlinks and dead placements with redirect-aware checks—so linkbuilding wins do not rot unnoticed.
- [Nofollow, Sponsored, and UGC: What Link Audits Should Flag](https://linkglow.io/blog/nofollow-sponsored-ugc-explained): A clear guide to rel=nofollow, sponsored, and ugc for SEO audits—and why misreading them burns linkbuilding ROI.
- [Placement Monitoring for Linkbuilders: Catch Drops Before Clients Do](https://linkglow.io/blog/placement-monitoring-for-linkbuilders): How placement monitoring turns one-off link audits into retention: alerts when a link disappears, breaks, or flips rel policy.
- [The SEO Link Audit Checklist That Actually Matches What Google Sees](https://linkglow.io/blog/seo-link-audit-checklist): A practical SEO link audit checklist for internal links, external links, and rel policy—without guessing from view-source alone.