Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add ashish7802/awesome-api-skills --skill resendgit clone --depth 1 https://github.com/ashish7802/awesome-api-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/ashish7802/awesome-api-skills/resend)<a href="https://agentmods.dev/skills/ashish7802/awesome-api-skills/resend"><img src="https://agentmods.dev/badge/skills/ashish7802/awesome-api-skills/resend/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/ashish7802/awesome-api-skills/resend"><img src="https://agentmods.dev/badge/skills/ashish7802/awesome-api-skills/resend.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00000 | $0.00596 |
| Opus 5 | $0.00000 | $0.00298 |
| Sonnet 5 | $0.00000 | $0.00119 |
| Haiku 4.5 | $0.00000 | $0.00060 |
Grade A, and why
resend scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 61 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Resend API Skill
Quick Start
Resend focuses on developer experience, bypassing legacy SMTP complexity. It inherently supports React Email for component-driven templating.
npm install resend react-email
Common Workflows
Transactional Emails
Trigger confirmation emails immediately after Stripe webhooks or Clerk user creations. Combine Resend with React Email to construct type-safe, cross-client compatible email components.
Production Patterns
Batch Sending
When notifying thousands of users (e.g., product updates), do not iterate resend.emails.send(). Instead, construct an array of payload objects and utilize resend.batch.send() to drastically reduce API latency and HTTP overhead.
Error Recovery
Handle ResendError. If sending fails due to HTTP 429 (Rate Limit), implement a dead-letter queue (DLQ) in your architecture (via SQS or Redis) to automatically retry the payload. Watch for bounce events via Webhooks.
Security Notes
Enforce Domain Authentication (DKIM/SPF/DMARC) in the Resend dashboard immediately. Unverified domains will land in spam or be outright rejected by Gmail and Outlook. Rotate API keys if exposed, as they possess sending authority.
Performance Considerations
HTML payloads can become large. Do not attach files larger than 10MB directly; instead, upload large attachments to an S3 bucket and provide a presigned URL within the email body.
Testing Guidance
Use the resend.emails.send endpoint with a verified testing domain or route traffic to a local mailcatcher during CI/CD. Do not blast real emails to mock users.
Troubleshooting
If emails mysteriously drop, check the Resend Dashboard 'Logs' tab. Statuses like 'Bounced' usually indicate a hard rejection by the receiving mail server. Ensure your from domain matches the authenticated domain.
References
Related Skills
What ships with it
7 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 61 lines · 0 tokens per session scan A c030c3ee5884
resend is a skill published in the GitHub repository ashish7802/awesome-api-skills (13 stars, last pushed yesterday), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 596 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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