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 TommyBez/skillsboard --skill agent-email-inboxgit clone --depth 1 https://github.com/TommyBez/skillsboardWrote 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/tommybez/skillsboard/agent-email-inbox)<a href="https://agentmods.dev/skills/tommybez/skillsboard/agent-email-inbox"><img src="https://agentmods.dev/badge/skills/tommybez/skillsboard/agent-email-inbox/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/tommybez/skillsboard/agent-email-inbox"><img src="https://agentmods.dev/badge/skills/tommybez/skillsboard/agent-email-inbox.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 | $0.00094 | $0.03664 |
| Opus 5 | $0.00047 | $0.01832 |
| Sonnet 5 | $0.00019 | $0.00733 |
| Haiku 4.5 | $0.00009 | $0.00366 |
Grade A, and why
agent-email-inbox scanned grade A with 1 finding 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 11d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
1. Server is running: `curl http://localhost:3000` should return a response This is a copy
98% identical to agent-email-inbox — 8 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 397 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AI Agent Email Inbox
Overview
This skill covers setting up a secure email inbox that allows your application or AI agent to receive and respond to emails, with content safety measures in place.
Core principle: An AI agent's inbox receives untrusted input. Security configuration is important to handle this safely.
Why Webhook-Based Receiving?
Resend uses webhooks for inbound email, meaning your agent is notified instantly when an email arrives. This is valuable for agents because:
- Real-time responsiveness — React to emails within seconds, not minutes
- No polling overhead — No cron jobs checking "any new mail?" repeatedly
- Event-driven architecture — Your agent only wakes up when there's actually something to process
- Lower API costs — No wasted calls checking empty inboxes
Architecture
Sender → Email → Resend (MX) → Webhook → Your Server → AI Agent
↓
Security Validation
↓
Process or Reject
SDK Version Requirements
This skill requires Resend SDK features for webhook verification (webhooks.verify()) and email receiving (emails.receiving.get()). Always install the latest SDK version. If the project already has a Resend SDK installed, check the version and upgrade if needed.
| Language | Package | Min Version |
|---|---|---|
| Node.js | resend |
>= 6.9.2 |
| Python | resend |
>= 2.21.0 |
| Go | resend-go/v3 |
>= 3.1.0 |
| Ruby | resend |
>= 1.0.0 |
| PHP | resend/resend-php |
>= 1.1.0 |
| Rust | resend-rs |
>= 0.20.0 |
| Java | resend-java |
>= 4.11.0 |
| .NET | Resend |
>= 0.2.1 |
Install the resend npm package: npm install resend (or the equivalent for your language). For full sending docs, install the resend skill.
Quick Start
- Ask the user for their email address — You need a real email address to send test emails to. Ask the user and wait for their response before proceeding.
- Choose your security level — Decide how to validate incoming emails before any are processed
- Set up receiving domain — Configure MX records for the user's custom domain (see Domain Setup section)
- Create webhook endpoint — Handle
email.receivedevents with security built in from the start. The webhook endpoint MUST be a POST route. - Set up tunneling (local dev) — Use Tailscale Funnel (recommended) or ngrok. See references/webhook-setup.md
- Create webhook via API — Use the Resend Webhook API to register your endpoint programmatically. See references/webhook-setup.md
- Connect to agent — Pass validated emails to your AI agent for processing
What ships with it
3 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.
- 11d ago First seen · 397 lines · 94 tokens per session scan A 51838b3e3c3f
agent-email-inbox is a skill published in the GitHub repository TommyBez/skillsboard (6 stars, last pushed today), licensed MIT. It adds 94 tokens to every session and 3,664 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). It is 98% identical to agent-email-inbox, differing in 8 lines, and is treated as a copy.
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