# MailerLite: agent door 48, human door not measured
- Site: mailerlite.com
- Scanned: 2026-09-10
- Scan type: Basic scan
- Business type: b2b_saas
- Report: https://www.seconddoor.io/r/mailerlite-hu4qex
- Scanner version: 49
- Scanner release: c49d1def936f56a5ab0871f38c5e6412433ec37a
- Scoring methodology: 1
- Evidence schema: 1
0 human and 2 agent dimensions measured from the pages checked; remaining dimensions are not scored.
## Scores
| Measure | Score |
| --- | --- |
| Humans | not measured |
| Agents | 48/100 (2/6 dimensions) |
| Composite | 48/100 |
Agent door only. The human door could not be measured on this scan. A Door Gap needs both doors, so this scan does not report one.
## What the machine actually did
The scanner recorded successful observations for 7 of 9 checks, but could not find a contact route for machines. It came up empty on 1 other check too. 6 checks could not be measured; see the report limitations.
- ok      reach the site at all
- ok      find out whether machines are welcome
- ok      ask whether the door opens for requests carrying the AI crawlers' names
- ok      read the site's own guide for language models
- ok      find out what pages exist
- missing find a contact route for machines
- missing find an MCP manifest at the standard paths checked
- ok      read the homepage as data rather than as a page
- ok      read the developer documentation
## Top issues
1. **Our HTTP client did not receive readable content at the checked paths: /pricing.** (machine_discoverability)
   - Evidence: Checked paths: /pricing. The cause of these responses remains unknown.
   - Evidence: Checked URL: https://www.mailerlite.com
   - Fix: Review the recorded responses with the site operator. Confirm the cause and supported access policy before changing configuration; verified crawler access was not tested.
2. **No valid security.txt was identified at /.well-known/security.txt.** (machine_fetchable_trust)
The evidence and the recommended fix for the rest are on the report page: https://www.seconddoor.io/r/mailerlite-hu4qex
## Files generated from this scan
- **Let verified assistants through** at `notes`, 1 hour, developer. Verify: On a subsequent scan, compare the same endpoint and client response. An unavailable check remains unresolved.
- **Machine interfaces: where you stand** at `notes`, 10 minutes, no developer needed. Verify: The next scan finds the interface you published answering at its well-known path, and that check passes.
- **security.txt** at `/.well-known/security.txt`, 10 minutes, no developer needed. Verify: The next scan fetches /.well-known/security.txt as text and the security.txt check passes.
Each file is written from what this scan found on the site. The content is in the JSON once the evidence is opened: https://www.seconddoor.io/api/reports/mailerlite-hu4qex
## The agent door
- **machine_discoverability** 56/100. No restriction on the tested crawler names was found in robots.txt. Our browser received a refusal or a stripped page at the checked URL. No user agent rule refused the tested retrieval crawler names. A sitemap listing 859 URLs.
- **programmatic_onboarding** not measured. Not measured: our scanner could not identify the required evidence on the pages checked.
- **pricing_legibility** not measured. Not measured: an access refusal or challenge prevented our scanner from reading the required page.
- **agent_aware_instrumentation** not measured. Not measured: an access refusal or challenge prevented our scanner from reading the required page.
- **machine_fetchable_trust** 40/100. No security.txt was identified at the checked path. The homepage answers automated requests.
- **commercial_rails** not measured. Not measured: an access refusal or challenge prevented our scanner from reading the required page.
## The human door
- **steps_to_first_value** not measured. Not measured: an access refusal or challenge prevented our scanner from reading the required page.
- **required_fields** not measured. Not measured: an access refusal or challenge prevented our scanner from reading the required page.
- **verification_walls** not measured. Not measured: an access refusal or challenge prevented our scanner from reading the required page.
- **error_recovery** not measured. Not measured: an access refusal or challenge prevented our scanner from reading the required page.
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Scored by SecondDoor. Method: https://www.seconddoor.io/methodology
Scan another site: https://www.seconddoor.io
Rate an issue or this report: POST https://www.seconddoor.io/api/feedback, or the rate_fix tool on https://www.seconddoor.io/api/mcp