24.10%
Denominator: 996 conclusive domains. Coverage: 99.60% of the panel.
Provenance
This is why this page exists: the exact run that produced this figure, frozen alongside it rather than left to be inferred later.
| Vintage | 1 |
|---|---|
| Methodology | agents=2;protego=0.6.2 |
| Collector | 09f8f02+4de4916 |
| Computed at |
Every series value for this period
| Series | Value |
|---|---|
| Effective (named or blanket) | 27.11% |
| Blanket disallow (closed to every crawler) | 5.82% |
| Coverage | 99.60% |
| Unreadable robots.txt | 0.20% |
| AI2Bot | 5.62% |
| AI2Bot-Dolma | 4.62% |
| Amazonbot | 9.54% |
| Applebot-Extended | 10.74% |
| Brightbot | 3.41% |
| Bytespider | 14.26% |
| CCBot | 16.16% |
| ChatGLM-Spider | 3.01% |
| ChatGPT-User | 11.14% |
| Claude-SearchBot | 8.53% |
| Claude-User | 8.03% |
| Claude-Web | 8.03% |
| ClaudeBot | 14.86% |
| DeepSeekBot | 4.22% |
| Devin | 2.51% |
| Diffbot | 9.54% |
| DuckAssistBot | 6.73% |
| GPTBot | 16.27% |
| Gemini-Deep-Research | 3.01% |
| Google-CloudVertexBot | 5.02% |
| Google-Extended | 13.96% |
| Google-NotebookLM | 2.61% |
| GoogleAgent-Mariner | 2.21% |
| ImagesiftBot | 6.83% |
| MistralAI-User | 5.22% |
| OAI-SearchBot | 9.94% |
| PanguBot | 4.92% |
| Perplexity-User | 7.33% |
| PerplexityBot | 14.06% |
| PhindBot | 2.31% |
| SBIntuitionsBot | 2.81% |
| TavilyBot | 2.21% |
| Timpibot | 7.53% |
| WrtnBot | 2.21% |
| YouBot | 7.93% |
| anthropic-ai | 9.14% |
| cohere-ai | 9.64% |
| cohere-training-data-crawler | 5.02% |
| iaskspider | 2.51% |
| meta-externalagent | 11.55% |
| meta-externalfetcher | 6.53% |
| meta-webindexer | 3.21% |
| omgili | 9.34% |
| omgilibot | 7.93% |
| webzio-extended | 5.72% |
Restatements
This period has never been restated: the value above is the only one ever published for it.
Suggested citation
Agent Accessibility Index, 2026-09-28: 24.10% (vintage 1). https://allanderek.github.io/tallyhouse/agent-accessibility/releases/2026-09-28/index.html
The two ledgers below carry this period's rows among every other period's; anything named for this period alone is listed with them.
Downloads
Every figure published on this site can be re-derived from these files. The two ledgers below are served as the exact bytes committed to the repository, not regenerated.
| File | Rows | Size | Description |
|---|---|---|---|
| Headline ledger | 20 | 2.6 KB | Every headline figure ever published, for both indices, including superseded vintages and the reason each was restated. Served as the exact bytes committed to the repository. |
| Series ledger | 948 | 130.2 KB | Every sub-series: the per-crawler rates, effective and blanket blocking, coverage, the unreadable share and the like-for-like change. Same vintage rules as the headline ledger, same exact bytes. |