name string | description string | source string | documentation string | license string | attribution string | lastVerified timestamp[s] | count int64 | crawlers list |
|---|---|---|---|---|---|---|---|---|
AI Crawler User Agents | Every known AI crawler and agent user-agent string, with operator, purpose, robots.txt compliance, and documented crawl-delay support. | https://geoprompttracker.com/bots | https://geoprompttracker.com/guides/list-of-ai-crawlers | CC-BY-4.0 | GeoPromptTracker (https://geoprompttracker.com) | 2026-09-13T00:00:00 | 28 | [
{
"userAgent": "GPTBot",
"slug": "gptbot",
"operator": "OpenAI",
"purpose": "training",
"description": "Crawls content to train OpenAI's models.",
"robotsCompliance": "yes",
"robotsNote": "OpenAI documents GPTBot's IP ranges and states it honors robots.txt disallow rules.",
"docsUrl"... |
AI Crawler User Agents
Machine-readable list of all 28 known AI crawler and agent user-agent strings — GPTBot, OAI-SearchBot, ClaudeBot, PerplexityBot, Google-Extended, Bytespider, Applebot-Extended, and more — with each bot's operator, purpose, observed robots.txt compliance, and documented crawl-delay support.
Fields
| Field | Description |
|---|---|
userAgent |
Token to match in robots.txt / server logs (e.g. GPTBot) |
operator |
Company running the crawler |
purpose |
training, search, or both |
description |
One-line summary |
robotsCompliance |
yes / partial / no / unknown — observed behavior, not just vendor claims |
robotsNote |
Sourced explanation of the rating |
docsUrl |
Official documentation, where published |
ipRangeUrl |
Operator-published IP-range JSON, where one exists — verify the crawler by IP instead of trusting the user-agent header |
crawlDelay |
yes / no, or absent — see the note below |
crawlDelayNote |
The operator's own wording, where they state one |
A note on crawlDelay
Only 4 of the 28 operators state any position on the crawl-delay
directive, and two of them support it:
| Crawler | crawl-delay | Source |
|---|---|---|
| YouBot | yes |
You.com documents that it honours crawl-delay directives |
| ImagesiftBot | yes |
Reads the value as the minimum seconds between consecutive requests, and documents the interval arithmetic |
| Amazonbot | no |
"They do not support the crawl-delay directive" |
| Applebot | no |
"Applebot does not follow crawl-delay" |
The other 24 publish nothing either way, and the field is absent for them
rather than set to no. In practice you should treat undocumented as
unsupported — crawl-delay was never in the robots.txt specification and Google
ignores it — but that is an assumption, not a finding, and the dataset keeps
the two distinct so you can tell which one you are looking at.
Use cases
- Generate robots.txt rules programmatically (block training bots, keep search bots)
- Detect AI crawler traffic in server logs or middleware
- Research on AI crawler behavior and robots.txt compliance
Source & freshness
Reviewed monthly. Always-current endpoint (CORS enabled): https://geoprompttracker.com/data/ai-crawlers.json
Human-readable directory with per-bot robots.txt rules: https://geoprompttracker.com/bots
GitHub mirror: https://github.com/osamamumtaz01/ai-crawler-user-agents
Attribution
CC BY 4.0 — free for commercial use. Please credit: "AI crawler data from GeoPromptTracker, CC BY 4.0"
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