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 Asymmetric-al/core --skill resend-cligit clone --depth 1 https://github.com/Asymmetric-al/coreWrote 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/asymmetric-al/core/resend-cli)<a href="https://agentmods.dev/skills/asymmetric-al/core/resend-cli"><img src="https://agentmods.dev/badge/skills/asymmetric-al/core/resend-cli/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/asymmetric-al/core/resend-cli"><img src="https://agentmods.dev/badge/skills/asymmetric-al/core/resend-cli.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00114 | $0.02671 |
| Opus 5 | $0.00057 | $0.01336 |
| Sonnet 5 | $0.00023 | $0.00534 |
| Haiku 4.5 | $0.00011 | $0.00267 |
Grade C, and why
resend-cli scanned grade C with 2 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.
Downloads and executes remote codehighSupply chain
curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.
curl -fsSL https://resend.com/install.sh | bash Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -fsSL https://resend.com/install.sh | bash The source is not reproduced here
Licensed AGPL-3.0
The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.
What ships with it
16 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.
- references/api-keys.md 1.2 KB
- references/auth.md 1.4 KB
- references/automations.md 6.2 KB
- references/broadcasts.md 5.4 KB
- references/contact-properties.md 2.1 KB
- references/contacts.md 3.0 KB
- references/domains.md 3.5 KB
- references/emails.md 8.4 KB
- references/error-codes.md 4.7 KB
- references/logs.md 1.2 KB
- references/segments.md 1.6 KB
- references/templates.md 3.1 KB
- references/topics.md 1.4 KB
- references/upstream.md 2.1 KB
- references/webhooks.md 3.1 KB
- references/workflows.md 10 KB
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 · 261 lines · 114 tokens per session scan C 29e3386173c2
resend-cli is a skill published in the GitHub repository Asymmetric-al/core (391 stars, last pushed yesterday), licensed AGPL-3.0. It adds 114 tokens to every session and 2,671 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
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