Bot Intelligence Record

YahooCacheSystem

YahooCacheSystem caches website contents as part of the Yahoo! Search Service.

YahooCacheSystem
OperatorYahoo
FamilyYahoo
Typesearch
Riskneutral
Blockdepends
Verified1
Verification Guidance

User-agent strings can be copied. Use this record for identification, logging, filtering, and review. For allow lists or low-friction rules, pair the identifier with operator documentation, reverse DNS, IP ranges, request signatures, or another verification method when available.

Identification

User-Agent: YahooCacheSystem

HTTP Agent: YahooCacheSystem; YahooWebServiceClient

Robots Token: YahooCacheSystem

Purpose: indexing

Identity: verified-bot

Handling

Common Use: Search indexing, content discovery, rendering, or search-result freshness checks.

Detection Notes: Match `YahooCacheSystem` as a case-insensitive substring in HTTP user-agent logs. Use bot_http_agent for full user-agent examples when the client sends a longer browser-like string. Do not treat a user-agent match alone as proof of identity for allow-listing.

Risk: neutral

Should Block: depends

Respects Robots: no

Rules

Block Snippet

User-agent: YahooCacheSystem Disallow: /

Sources

Source

Operator

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