ua-tracer
by Paul Kinlan
trace R0MLdYq6
what does a user agent actually fetch, follow & run?
Trace R0MLdYq6
First seen: 2026-07-03 04:28:25.543 UTC
User-Agent: Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0
Bot verification: Not a known bot (no IP-range check applies).
What this user agent did
Directly-referenced assets:
✗ fetched CSS
✓ fetched JS
✗ fetched image
✗ fetched font (HTML)
Document-level link hints:
✓ fetched favicon
✗ fetched apple-touch-icon
✗ fetched web manifest
✗ fetched preload
✓ fetched prefetch
Second-level follows (proves it parsed the linking file):
✗ followed CSS background-image
✗ followed CSS @font-face
✗ followed manifest icon
✗ followed CSS @import
Frames (does it descend into iframes?):
✓ fetched iframe document
✗ descended into iframe (loaded inner image)
Reporting (a report-only CSP is violated by inline styles; reports can arrive via HTTP headers with no JS, or via in-page beacons):
✓ sent a CSP/Reporting report (any path)
✓ delivered via report-uri/Report-To header (no JS)
✓ delivered via in-page beacon (securitypolicyviolation / ReportingObserver)
Social embed (Open Graph / Twitter card images):
✗ fetched og:image
✗ fetched twitter:image
JavaScript execution:
✗ EXECUTED classic JS
✗ EXECUTED ES module
✗ posted client timing
Server-side request waterfall
Every request the server received for this trace, in receive order. +ms is the delta from the
homepage request.
| Received | Δ | Kind | Method | User-Agent |
|---|---|---|---|---|
| 2026-07-03 04:28:25.543 UTC | +0 ms | homepage | GET | Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 |
request headers (9){
"accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
"accept-encoding": "gzip,deflate",
"connection": "keep-alive",
"from": "support@search.yandex.ru",
"host": "uatracer.com",
"traceparent": "00-e0beb908a56dfe3df9f77a07f63d8e1c-14c7ada022cf1180-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-03 04:28:28.023 UTC | +2480 ms | ES module | GET | Mozilla/5.0 (compatible; YandexRenderResourcesBot/1.0; +http://yandex.com/bots) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 |
request headers (14){
"accept": "*/*",
"accept-encoding": "gzip,deflate",
"connection": "keep-alive",
"cookie": "ua-tracer-trace=R0MLdYq6",
"from": "support@search.yandex.ru",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-51f238cd2eef6c6b0af42f4a10babe41-a791193d04ea4c28-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; YandexRenderResourcesBot/1.0; +http://yandex.com/bots) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-51f238cd2eef6c6b0af42f4a10babe41-ee3dcc36584e3ef7-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-03 04:28:28.475 UTC | +2932 ms | prefetch | GET | Mozilla/5.0 (compatible; YandexRenderResourcesBot/1.0; +http://yandex.com/bots) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 |
request headers (12){
"accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7",
"accept-encoding": "gzip,deflate",
"connection": "keep-alive",
"cookie": "ua-tracer-trace=R0MLdYq6",
"from": "support@search.yandex.ru",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"sec-purpose": "prefetch",
"traceparent": "00-0d12debd798275fab0921da00f6fb01a-1842d3416a535b58-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; YandexRenderResourcesBot/1.0; +http://yandex.com/bots) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-03 04:28:28.507 UTC | +2964 ms | JS | GET | Mozilla/5.0 (compatible; YandexRenderResourcesBot/1.0; +http://yandex.com/bots) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 |
request headers (13){
"accept": "*/*",
"accept-encoding": "gzip,deflate",
"connection": "keep-alive",
"cookie": "ua-tracer-trace=R0MLdYq6",
"from": "support@search.yandex.ru",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-3c29d41cf754f5d49e094169fdcf8d2f-dd02273cfce6e378-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; YandexRenderResourcesBot/1.0; +http://yandex.com/bots) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-3c29d41cf754f5d49e094169fdcf8d2f-46e168df8df199bf-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-03 04:28:30.151 UTC | +4608 ms | CSP violation report (POST) | POST | Mozilla/5.0 (compatible; YandexRenderResourcesBot/1.0; +http://yandex.com/bots) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 |
request headers (17){
"accept": "*/*",
"accept-encoding": "gzip,deflate",
"connection": "keep-alive",
"content-length": "402",
"content-type": "application/json",
"cookie": "ua-tracer-trace=R0MLdYq6",
"from": "support@search.yandex.ru",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-b0921491f825fcdd870f2c37a283d1f9-a28d6ce1e0850887-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; YandexRenderResourcesBot/1.0; +http://yandex.com/bots) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-b0921491f825fcdd870f2c37a283d1f9-72f6c03cc5e0ffa9-01",
"x-deno-userspace-tracestate": "",
"x-report-body": "{\"source\":\"securitypolicyviolation\",\"violatedDirective\":\"style-src-attr\",\"effectiveDirective\":\"style-src-attr\",\"blockedURI\":\"inline\",\"documentURI\":\"https://uatracer.com/\",\"disposition\":\"report\",\"lineNumber\":45,\"sourceFile\":\"https://uatracer.com/r/R0MLdYq6/UsqYaJ1Q/main.js\",\"ua\":\"Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0\"}"
}
|
||||
| 2026-07-03 04:28:30.631 UTC | +5088 ms | Reporting API report (POST) | POST | Mozilla/5.0 (compatible; YandexRenderResourcesBot/1.0; +http://yandex.com/bots) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 |
request headers (15){
"accept": "*/*",
"accept-encoding": "gzip,deflate",
"connection": "keep-alive",
"content-length": "2195",
"content-type": "application/json",
"cookie": "ua-tracer-trace=R0MLdYq6",
"from": "support@search.yandex.ru",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-b125c9b80aef3a282fb04d3a78872f00-2a14a28f630071cb-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; YandexRenderResourcesBot/1.0; +http://yandex.com/bots) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-report-body": "{\"source\":\"ReportingObserver\",\"reports\":[{\"type\":\"csp-violation\",\"url\":\"https://uatracer.com/\",\"body\":{\"sourceFile\":\"https://uatracer.com/\",\"lineNumber\":9,\"columnNumber\":0,\"documentURL\":\"https://uatracer.com/\",\"referrer\":\"\",\"blockedURL\":\"inline\",\"effectiveDirective\":\"style-src-elem\",\"originalPolicy\":\"style-src 'self'; report-uri /r/R0MLdYq6/UsqYaJ1Q/csp-report; report-to ua-tracer\",\"sample\":\"\",\"disposition\":\"report\",\"statusCode\":200}},{\"type\":\"csp-violation\",\"url\":\"https://uatracer.com/\",\"body\":{\"sourceFile\":\"https://uatracer.com/\",\"lineNumber\":235,\"columnNumber\":0,\"documentURL\":\"https://uatracer.com/\",\"referrer\":\"\",\"blockedURL\":\"inline\",\"effectiveDirective\":\"style-src-attr\",\"originalPolicy\":\"style-src 'self'; report-uri /r/R0MLdYq6/UsqYaJ1Q/csp-report; report-to ua-tracer\",\"sample\":\"\",\"disposition\":\"report\",\"statusCode\":200}},{\"type\":\"csp-violation\",\"url\":\"https://uatracer.com/\",\"body\":{\"sourceFile\":\"https://uatracer.com/\",\"lineNumber\":239,\"columnNumber\":0,\"documentURL\":\"https://uatracer.com/\",\"referrer\":\"\",\"blockedURL\":\"inline\",\"effectiveDirective\":\"style-src-attr\",\"originalPolicy\":\"style-src 'self'; report-uri /r/R0MLdYq6/UsqYaJ1Q/csp-report; report-to ua-tracer\",\"sample\":\"\",\"disposition\":\"report\",\"statusCode\":200}},{\"type\":\"csp-violation\",\"url\":\"https://uatracer.com/\",\"body\":{\"sourceFile\":\"https://uatracer.com/\",\"lineNumber\":747,\"columnNumber\":0,\"documentURL\":\"https://uatracer.com/\",\"referrer\":\"\",\"blockedURL\":\"inline\",\"effectiveDirective\":\"style-src-attr\",\"originalPolicy\":\"style-src 'self'; report-uri /r/R0MLdYq6/UsqYaJ1Q/csp-report; report-to ua-tracer\",\"sample\":\"\",\"disposition\":\"report\",\"statusCode\":200}},{\"type\":\"csp-violation\",\"url\":\"https://uatracer.com/\",\"body\":{\"sourceFile\":\"https://uatracer.com/r/R0MLdYq6/UsqYaJ1Q/main.js\",\"lineNumber\":45,\"columnNumber\":11,\"documentURL\":\"https://uatracer.com/\",\"referrer\":\"\",\"blockedURL\":\"inline\",\"effectiveDirective\":\"style-src-attr\",\"originalPolicy\":\"style-src 'self'; report-uri /r/R0MLdYq6/UsqYaJ1Q/csp-report; report-to ua-tracer\",\"sample\":\"\",\"disposition\":\"report\",\"statusCode\":200}}],\"ua\":\"Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0\"}"
}
|
||||
| 2026-07-03 04:28:33.005 UTC | +7462 ms | Reporting API report (POST) | POST | Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/138.0.0.0 YaBrowser/25.8.0.0 Safari/537.36 |
request headers (15){
"accept-encoding": "gzip, deflate, br, zstd",
"accept-language": "ru,en;q=0.9",
"content-length": "2733",
"content-type": "application/reports+json",
"cookie": "ua-tracer-trace=R0MLdYq6",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"priority": "u=4, i",
"traceparent": "00-67d6c24980bbe637284acf998e420538-c52ec7d87e122d07-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/138.0.0.0 YaBrowser/25.8.0.0 Safari/537.36",
"via": "HTTP/2 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-67d6c24980bbe637284acf998e420538-e67f0c9d5f0796cb-01",
"x-deno-userspace-tracestate": "",
"x-report-body": "[{\"age\":5399,\"body\":{\"blockedURL\":\"inline\",\"disposition\":\"report\",\"documentURL\":\"https://uatracer.com/\",\"effectiveDirective\":\"style-src-attr\",\"lineNumber\":235,\"originalPolicy\":\"style-src 'self'; report-uri /r/R0MLdYq6/UsqYaJ1Q/csp-report; report-to ua-tracer\",\"referrer\":\"\",\"sample\":\"\",\"sourceFile\":\"https://uatracer.com/\",\"statusCode\":200},\"type\":\"csp-violation\",\"url\":\"https://uatracer.com/\",\"user_agent\":\"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/138.0.0.0 YaBrowser/25.8.0.0 Safari/537.36\"},{\"age\":5401,\"body\":{\"blockedURL\":\"inline\",\"disposition\":\"report\",\"documentURL\":\"https://uatracer.com/\",\"effectiveDirective\":\"style-src-elem\",\"lineNumber\":9,\"originalPolicy\":\"style-src 'self'; report-uri /r/R0MLdYq6/UsqYaJ1Q/csp-report; report-to ua-tracer\",\"referrer\":\"\",\"sample\":\"\",\"sourceFile\":\"https://uatracer.com/\",\"statusCode\":200},\"type\":\"csp-violation\",\"url\":\"https://uatracer.com/\",\"user_agent\":\"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/138.0.0.0 YaBrowser/25.8.0.0 Safari/537.36\"},{\"age\":5399,\"body\":{\"blockedURL\":\"inline\",\"disposition\":\"report\",\"documentURL\":\"https://uatracer.com/\",\"effectiveDirective\":\"style-src-attr\",\"lineNumber\":239,\"originalPolicy\":\"style-src 'self'; report-uri /r/R0MLdYq6/UsqYaJ1Q/csp-report; report-to ua-tracer\",\"referrer\":\"\",\"sample\":\"\",\"sourceFile\":\"https://uatracer.com/\",\"statusCode\":200},\"type\":\"csp-violation\",\"url\":\"https://uatracer.com/\",\"user_agent\":\"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/138.0.0.0 YaBrowser/25.8.0.0 Safari/537.36\"},{\"age\":3310,\"body\":{\"blockedURL\":\"inline\",\"columnNumber\":11,\"disposition\":\"report\",\"documentURL\":\"https://uatracer.com/\",\"effectiveDirective\":\"style-src-attr\",\"lineNumber\":45,\"originalPolicy\":\"style-src 'self'; report-uri /r/R0MLdYq6/UsqYaJ1Q/csp-report; report-to ua-tracer\",\"referrer\":\"\",\"sample\":\"\",\"sourceFile\":\"https://uatracer.com/r/R0MLdYq6/UsqYaJ1Q/main.js\",\"statusCode\":200},\"type\":\"csp-violation\",\"url\":\"https://uatracer.com/\",\"user_agent\":\"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/138.0.0.0 YaBrowser/25.8.0.0 Safari/537.36\"},{\"age\":5399,\"body\":{\"blockedURL\":\"inline\",\"disposition\":\"report\",\"documentURL\":\"https://uatracer.com/\",\"effectiveDirective\":\"style-src-attr\",\"lineNumber\":747,\"originalPolicy\":\"style-src 'self'; report-uri /r/R0MLdYq6/UsqYaJ1Q/csp-report; report-to ua-tracer\",\"referrer\":\"\",\"sample\":\"\",\"sourceFile\":\"https://uatracer.com/\",\"statusCode\":200},\"type\":\"csp-violation\",\"url\":\"https://uatracer.com/\",\"user_agent\":\"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/138.0.0.0 YaBrowser/25.8.0.0 Safari/537.36\"}]"
}
|
||||
| 2026-07-03 04:28:33.791 UTC | +8248 ms | favicon | GET | Mozilla/5.0 (compatible; YandexRenderResourcesBot/1.0; +http://yandex.com/bots) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 |
request headers (13){
"accept": "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8",
"accept-encoding": "gzip,deflate",
"connection": "keep-alive",
"cookie": "ua-tracer-trace=R0MLdYq6",
"from": "support@search.yandex.ru",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-0451c3ca83bee2c211ae085abc157437-f3176f4e17333bee-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; YandexRenderResourcesBot/1.0; +http://yandex.com/bots) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-0451c3ca83bee2c211ae085abc157437-196aecbb13fabc07-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-03 04:28:57.264 UTC | +31721 ms | iframe document | GET | Mozilla/5.0 (compatible; YandexRenderResourcesBot/1.0; +http://yandex.com/bots) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 |
request headers (12){
"accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7",
"accept-encoding": "gzip,deflate",
"connection": "keep-alive",
"cookie": "ua-tracer-trace=R0MLdYq6",
"from": "support@search.yandex.ru",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-8ec44d2a66dd0e27babb47bcf280eba0-4f14de2e14dc75b0-01",
"tracestate": "",
"upgrade-insecure-requests": "1",
"user-agent": "Mozilla/5.0 (compatible; YandexRenderResourcesBot/1.0; +http://yandex.com/bots) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
|
||||