Overview
SendGrid is a webhook callback used for webhook delivery, payment notifications, service callbacks, and server-to-server integration events.
Its primary user-agent pattern is SendGrid Event API.
SendGrid is Unverified at the identity-evidence level. The listed identity remains useful for detection, but this record does not currently contain authoritative evidence sufficient to authenticate the identity claim.
Robots.txt behavior is not currently confirmed.
SendGrid can usually be allowed after confirming the source and monitoring request volume.
Identity
- User-Agent Pattern
-
SendGrid Event API - HTTP Agent Examples
-
SendGrid Event API - Robots Token
- SendGrid Event API
- Identity Type
- Observed
- Evidence Method
- Treat `SendGrid Event API` as an identity signal only. Confirm it with current operator documentation, cryptographic verification, forward-confirmed reverse DNS, source-network ownership, or other authoritative evidence before trusting the claimed identity.
Classification
- Type
- Webhook
- Kind
- Webhook
- Family
- SendGrid
- Purpose
- Webhook
Behavior and handling
- Common Use
- SendGrid is used for webhook delivery, payment notifications, service callbacks, and server-to-server integration events.
- Detection Notes
- SendGrid traffic is primarily detected by the `SendGrid Event API` user-agent pattern. Compare source IPs, reverse DNS, request paths, and crawl cadence before trusting the traffic.
- Respects robots.txt
- Unknown
- Spoofing Risk
- SendGrid has medium spoofing risk because user-agent strings can be copied; pair the match with DNS, IP, behavior, or operator evidence.
- Risk
- Safe
- Recommended Handling
- Do not block
Rules and controls
- Robots.txt Snippet
-
# robots.txt behavior is unconfirmed. Do not rely on this rule without verification.
Relationships
- Operator
- SendGrid Checked 2026-08-07
Relationships without an Evidence link are normalized from the canonical directory record. They should not be interpreted as independent proof of physical presence or request origin.