mttr and Screaming Frog
Screaming Frog’s SEO Spider crawls every page on your own computer, with nearly every setting there is. mttr adds the reading an AI assistant does and a ranked plan of fixes, free and with nothing to install. Crawl with one; decide what comes first with the other.
Keep Screaming Frog. Add mttr on top.
mttr is not a replacement for Screaming Frog. It is a free layer that reads your pages the way search engines and AI assistants do.
What Screaming Frog is best at
- A deep crawl you controlEvery address your computer can hold, with custom extraction, include and exclude rules, and crawls compared.
- JavaScript renderingThe page as drawn beside the HTML as sent, crawled as any user agent you choose.
- Data joined to each addressSearch Console, analytics and PageSpeed figures, and links from Ahrefs, Majestic or Moz.
- Log File AnalyserA separate tool that shows which crawlers really fetched which pages.
What mttr adds on top
- Fixes ranked by what they are worthEach failing rule weighed by its stage and by how many pages miss it, so the first fix is the one that moves the most.
- A reader for what code cannot countA reasoning model reads for things such as whether a page answers before it explains. It only advises; code decides.
- Signs of generated textHidden characters, chat and markdown left in, placeholders never filled and stock phrasing, page by page.
- A loop your agent runsThe plan in your agent’s words for Claude Code, Codex or Cursor, and 62 MCP tools: it makes each change, asks for a fresh read, and mttr says which rules now pass.
Which tool for which job
Both means each does a part of it.
| Job | Use | Why |
|---|---|---|
| Crawl every address of a large site | Screaming Frog | mttr reads the first 100 pages. |
| Extract custom data from pages | Screaming Frog | Any field, by CSS path, XPath or pattern. |
| Compare two crawls in detail | Screaming Frog | What changed between two crawls, address by address. |
| See what AI crawlers get | Both | The Spider can crawl as any agent and show the HTML before script; mttr checks it on every page by default, with robots.txt and the firewall. |
| Decide which fix to make first | mttr | Fixes weighed by stage and by how many pages miss them. |
| Judge whether a page answers before it explains | mttr | A reasoning model reads; code decides. |
| Hand the work to an agent | Both | The Spider’s MCP gives an agent crawl data; mttr’s gives it the plan and checks each fix. |
Screaming Frog and mttr together
A way of working that plays to each.
- 01mttr
Start with the ranked plan
Read the site in mttr for the fixes worth the most and the pages each one touches.
Read a site - 02Screaming Frog
Crawl the whole site
Run the SEO Spider past the first 100 pages to find every page with the same fault, with filters and custom extraction.
- 03mttr
Fix and recheck
Hand the fixes to your agent. mttr reads the site again and says which rules now pass; a fresh crawl confirms the rest of the site.
Connect an agent
Free checks to run beside Screaming Frog
Each reads one page or one domain, with no sign-up.
- AI crawler checkerWhich AI crawlers robots.txt lets in, and whether there is an llms.txt.
- What an agent readsA page beside the Markdown an assistant gets from it, and what gets in the way.
- Schema markup checkerEvery block of structured data: whether it parses, and what it lacks.
- Multi-location graderEvery location page read together, and graded on what only shows across them.
Feature by feature
| What | mttr | Screaming Frog |
|---|---|---|
| Built for | Making each page readable, believable and actionable for search engines and AI assistants, and handing the fixes to your agent. | A crawler on your own computer that audits a site for over 300 issues, with JavaScript rendering and structured data checks. |
| Reads and audits a site | Yes, the first 100 pages of any public site, on mttr’s servers, with nothing to install. | Yes, every page your computer can hold, with nearly every setting there is. |
| What AI crawlers get | Yes: the words in the HTML before any script, whether robots.txt and the firewall let AI crawlers in, and one address for each page. | Partly: it can crawl as any user agent and set the HTML as sent beside the page as drawn. |
| Judges the writing | Yes: a reasoning model reads for what a rule cannot count, such as whether a page answers before it explains. A model only advises; code decides. | Prompts you write can run on each page, with your own key for OpenAI, Gemini or Anthropic. |
| MCP server | Yes, 62 tools, with a key an email gets. | Yes, from version 24, on a paid licence, running on the same computer as the app. |
| Fixes handed to an agent | Yes: the fixes worth the most in your agent’s words, and each fix read again on the live site once it ships. | Its MCP lets an agent run crawls and read the results; a fix is checked by the next crawl. |
| Links from other sites | No. mttr keeps no index of links from other sites. | Links within the site, and others through tools you connect, such as Ahrefs or Majestic. |
| Keywords and rankings | No. | Not itself; Search Console and analytics can be connected. |
| Mentions in AI answers | Not built yet. | No. |
| To start | Free. Reading a site needs no sign-up. | Free up to 500 addresses; a paid licence for more. |
What this page says of Screaming Frog comes from its own pages and reviews of it, as of October 2026. Its plans change; screamingfrog.co.uk has the current ones.
Questions
Is mttr a Screaming Frog alternative?
No. The SEO Spider crawls every page with every setting there is; mttr reads the first 100 pages of a site. mttr adds what the Spider leaves to you: which fix matters most, what an AI assistant needs from each page, and a plan your agent can work from.
Can I use mttr with Screaming Frog?
Yes. Read the site in mttr for the ranked plan, then crawl the whole site with the SEO Spider to find every page with the same fault. mttr checks the fixes once they are live.
Does mttr need installing?
No. mttr reads a site on its own servers. Type a domain on mttr.si, or connect an agent to its MCP server.
Is mttr free?
Yes. Reading any public site is free, with no sign-up: the first 100 pages, a score, its place and the fixes worth the most. An email gets a key, and the key connects your agent.
mttr with other tools
mttr sits on top of each, on the same terms.
Read your site
Free, about a minute. Its score, its place, and the fixes worth the most.