mttr and Sitebulb
Sitebulb audits a site on your computer or in the cloud, and explains every hint with a priority and a chart. mttr adds what an AI assistant needs from each page and a plan your agent can work from, free.
Keep Sitebulb. Add mttr on top.
mttr is not a replacement for Sitebulb. It is a free layer that reads your pages the way search engines and AI assistants do.
What Sitebulb is best at
- Hints with prioritiesEach issue explained: why it matters and how urgent it is.
- Reports people can readCrawl maps and charts for a team or a client.
- Response vs RenderThe HTML as sent beside the page as drawn, for every page.
- Desktop or cloudCrawl on your own machine, or in the cloud for large sites and teams.
What mttr adds on top
- 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.
- Pages read as an AI crawler gets themThe words in the HTML before any script, whether robots.txt and the firewall let GPTBot, ClaudeBot and PerplexityBot in, and one address for each page.
- 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 |
|---|---|---|
| Run a deep technical audit | Sitebulb | Hundreds of hints, each with a priority. |
| Show a client or a team the findings | Sitebulb | Its charts and crawl maps. |
| Set the HTML as sent beside the page as drawn | Both | Sitebulb does it at scale; mttr checks each page’s words are there before any script. |
| Check AI crawlers are let in | mttr | robots.txt and the firewall, crawler by crawler. |
| Judge the writing on each page | mttr | A reasoning model reads for an answer up front; code decides. |
| Hand fixes to an agent and recheck them | mttr | Sitebulb’s MCP reads finished audits; mttr’s also asks for a fresh read. |
Sitebulb and mttr together
A way of working that plays to each.
- 01Sitebulb
Audit the site in Sitebulb
Its hints and charts show the technical state of the whole site.
- 02mttr
Add the assistant’s view
Read the site in mttr: AI crawler access, words before script, structured data that fits, and whether each page answers.
Read a site - 03mttr
Work from one list
Hand mttr’s plan to your agent beside Sitebulb’s hints, then let mttr read the site again to prove each fix took.
Connect an agent
Free checks to run beside Sitebulb
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.
- Heading checkerThe h1 to h6 outline a crawler reads, and what is wrong with it.
- Redirect checkerEvery hop an address takes, with its status code and where it points.
Feature by feature
| What | mttr | Sitebulb |
|---|---|---|
| Built for | Making each page readable, believable and actionable for search engines and AI assistants, and handing the fixes to your agent. | A website auditor on your computer or in the cloud, known for prioritised hints and visual reports. |
| Reads and audits a site | Yes, the first 100 pages of any public site, on mttr’s servers, with nothing to install. | Yes, on your computer or in the cloud. |
| 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: Response vs Render sets 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. | Not a stated feature. |
| MCP server | Yes, 62 tools, with a key an email gets. | Yes, read only: an assistant reads finished audits but cannot start one. On every plan. |
| 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 reads audits; a fix is checked by the next audit. |
| Links from other sites | No. mttr keeps no index of links from other sites. | Links within the site. |
| Keywords and rankings | No. | No. |
| Mentions in AI answers | Not built yet. | No. |
| To start | Free. Reading a site needs no sign-up. | Desktop and Cloud plans, with a free trial. |
What this page says of Sitebulb comes from its own pages and reviews of it, as of October 2026. Its plans change; sitebulb.com has the current ones.
Questions
Is mttr a Sitebulb alternative?
No. Sitebulb is a deep technical auditor with charts made for teams. mttr is a free layer on top that reads each page the way AI assistants do, ranks the fixes and hands them to an agent.
Can I use mttr with Sitebulb?
Yes. Use Sitebulb for the technical audit and the report you share; use mttr for what assistants need from each page, and to check each fix on the live site.
Can an agent work with both?
Partly. Sitebulb’s MCP server lets an assistant read finished audits. mttr’s lets it read the plan, ask for a fresh read and see which rules now pass.
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.