# Stack Overflow: not measured
- Site: stackoverflow.com
- Scanned: 2026-09-10
- Scan type: Basic scan
- Business type: unknown
- Report: https://www.seconddoor.io/r/stackoverflow-egemxs
- Scanner version: 48
- Scanner release: 827acc8
- Scoring methodology: 1
- Evidence schema: 1
0 human and 0 agent dimensions measured from the pages checked; remaining dimensions are not scored.
## Scores
| Measure | Score |
| --- | --- |
| Humans | not measured |
| Agents | not measured |
| Composite | not measured |
Neither door could 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 0 of 7 checks, but could not read the site's own guide for language models. It came up empty on 6 other checks too. 7 checks could not be measured; see the report limitations.
- missing read the site's own guide for language models
- missing find out what pages exist
- missing find a contact route for machines
- missing find an MCP manifest at the standard paths checked
- missing find an agent plugin manifest
- missing find out whether verified agents are recognised
- missing find a machine readable API spec
## What a visitor meets
1. **Entry observation** (unmeasured). The linked entry destination presented our browser with an access challenge; its contents were not measured.
## 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.
- **sitemap.xml** at `/sitemap.xml`, 20 minutes, no developer needed. Verify: The next scan fetches /sitemap.xml, finds a urlset, and the sitemap 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.
- **llms.txt** at `/llms.txt`, 15 minutes, no developer needed. Verify: The next scan fetches /llms.txt as text and the llms.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/stackoverflow-egemxs
## The agent door
- **machine_discoverability** not measured. Not measured: an access refusal or challenge prevented our scanner from reading the required page.
- **programmatic_onboarding** not measured. Not measured: an access refusal or challenge prevented our scanner from reading the required page.
- **pricing_legibility** not measured. Not measured: our scanner could not identify the required evidence on the pages checked.
- **agent_aware_instrumentation** not measured. Not measured: a network request failed before the required evidence was collected.
- **machine_fetchable_trust** not measured. Not measured: an access refusal or challenge prevented our scanner from reading the required page.
- **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