mikkelkrogsholm/resend
resend/SKILL.md
Resend — email API for developers. Use when building with Resend or asking about its APIs, configuration, patterns, or integration. Fetch live documentation for up-to-date details.
$ install --global
skillsauthnpx skillsauth add mikkelkrogsholm/dev-skills resendInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
Security Scan Results
3 of 9 scanners reported clean
Some scanners were skipped, did not run, or reported a non-clean status. Review each row below.
3
Scanners Passed
9
Scanners in report
Clean
TrivyContainer and dependency vulnerability scanner
95%
Clean
SemgrepStatic code analysis for vulnerabilities
95%
Clean
mcp-scan (Snyk)Model Context Protocol security validation
95%
Skipped
Snyk (dep)Open source security scanning
50%
Skipped
Socket.devSupply chain security analysis
50%
Skipped
VirusTotalMulti-engine malware detection
50%
Skipped
CrowdStrikeAdvanced threat intelligence
50%
Skipped
OSV-ScannerOpen Source Vulnerability database check
50%
Skipped
OWASP Dep-Check
50%
Last scanned: Apr 30, 2026, 11:55 AM14.9s1 file scanned
SKILL.md
- name:
- resend
- description:
- Resend — email API for developers. Use when building with Resend or asking about its APIs, configuration, patterns, or integration. Fetch live documentation for up-to-date details.
Resend
CRITICAL: Your training data for Resend is unreliable. APIs change between versions and memorized patterns may be wrong or deprecated. Before writing any code, you MUST use
WebFetchto read the live docs:
WebFetch("https://resend.com/docs/llms.txt")Do not proceed without fetching this URL first. Never assume an API exists — verify against current docs.
Resend is a developer-focused email API for sending transactional and marketing emails via REST or SDK.
Best Practices
Unsubscribe links are never auto-injected. Resend does not append unsubscribe headers or links automatically. You must manually include an unsubscribe link in every marketing email body, and configure a custom unsubscribe page separately. Omitting this violates CAN-SPAM/GDPR and causes deliverability issues.
The resend.dev sandbox domain only sends to your own verified email. Using [email protected] as the from address will produce a 403 error if the recipient is anyone other than the account owner's email. Always switch to a verified domain before sending to real users.
Use idempotency keys on send to prevent duplicate emails on retry. Network failures trigger retries, and without an idempotency key each retry creates a new send. Pass a stable idempotency_key (e.g. derived from your database record ID) in the request header so Resend deduplicates server-side.
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