resend-inbound

resend-inbound is a skill for Claude Code from MoizIbnYousaf/marketing-cli. It costs 77 tokens per session (2,126 once invoked), scanned A, original, MIT.

A guide for receiving email through Resend and processing webhook notifications. A webhook is an HTTP message sent to your application when an event happens; the email body and attachments are retrieved separately.

In plain words
What is it for?
Use it to configure a receiving domain, handle email.received events, download message content and attachments, and route messages.
Why use it?
It provides a structured way to accept incoming mail, verify that notifications are genuine, and retrieve the actual message data.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the marketing-cli plugin — 88 skills, 9 commands, 1 hook, 2 MCP servers shipped together

Good fit Use it to configure a receiving domain, handle email.received events, download message content and attachments, and route messages.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/moizibnyousaf/marketing-cli/resend-inbound
Install

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.

Any agent
npx skills add MoizIbnYousaf/marketing-cli --skill resend-inbound
Clone the repo
git clone --depth 1 https://github.com/MoizIbnYousaf/marketing-cli

Made for: Claude Code.

Or install marketing-cli, the plugin that ships this one along with the rest of its 88 skills, 9 commands, 1 hook, 2 MCP servers.

Wrote 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.

agentmods badge for resend-inbound

README.md
[![agentmods](https://agentmods.dev/badge/skills/moizibnyousaf/marketing-cli/resend-inbound/github.svg)](https://agentmods.dev/skills/moizibnyousaf/marketing-cli/resend-inbound)
Your own site
<a href="https://agentmods.dev/skills/moizibnyousaf/marketing-cli/resend-inbound"><img src="https://agentmods.dev/badge/skills/moizibnyousaf/marketing-cli/resend-inbound/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.

agentmods 80×15 button for resend-inbound

Your own site · 80×15
<a href="https://agentmods.dev/skills/moizibnyousaf/marketing-cli/resend-inbound"><img src="https://agentmods.dev/badge/skills/moizibnyousaf/marketing-cli/resend-inbound.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 77 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,126 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to critical

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • critical YARA Match · line 93
    YARA rule matched a known malware signature (reverse shell, backdoor, ransomware, C2 framework, or info stealer).
    Fix: Remove the malware payload or compromised file entirely. Investigate how it entered the skill and audit all other artifacts for additional indicators of compromise.
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00077 $0.02126
Opus 5 $0.00039 $0.01063
Sonnet 5 $0.00015 $0.00425
Haiku 4.5 $0.00008 $0.00213

Measured 6d ago against content hash b5f1675824f0, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

resend-inbound 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 6d 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.

const response = await fetch(attachment.download_url);
skills/resend-inbound/SKILL.md · 295 lines

How it starts

The opening of the file, as written. The whole thing — 295 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Receive Emails with Resend

Overview

Resend processes incoming emails for your domain and sends webhook events to your endpoint. Webhooks contain metadata only — you must call separate APIs to retrieve email body and attachments.

This skill is context-independent — it does not use brand/ files and works identically in any project.

On Activation

  1. Determine if the user needs a Resend-managed domain or custom domain.
  2. Walk through domain setup and webhook configuration.
  3. Implement webhook handler with signature verification.
  4. Add content retrieval logic (body + attachments as needed).
  5. Add routing logic if multiple recipients are expected.

Output: A webhook handler file with signature verification, content retrieval, and routing logic.

Quick Start

  1. Configure receiving domain — Use Resend's .resend.app domain or add MX record for custom domain
  2. Set up webhook — Subscribe to email.received event
  3. Retrieve content — Call Receiving API for body, Attachments API for files

Domain Setup

Option 1: Resend-Managed Domain (Fastest)

Use your auto-generated address: <anything>@<your-id>.resend.app

No DNS configuration needed. Find your address in Dashboard → Emails → Receiving → "Receiving address".

Option 2: Custom Domain

Add MX record to receive at <anything>@yourdomain.com.

Setting Value
Type MX
Host Your domain or subdomain
Value Provided in Resend dashboard
Priority 10 (lowest number wins a conflict, but typically only multiples of 10 are used)

Critical: Your MX record must have the lowest priority value, or emails won't route to Resend.

Subdomain Recommendation

If you already have MX records (e.g., Google Workspace, Microsoft 365):

Approach Result
Use subdomain (recommended) support.acme.com → Resend, acme.com → existing provider
Use root domain All email routes to Resend (breaks existing email)

Read the full file on GitHub · 295 lines

Changes

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.

  1. 6d ago First seen · 295 lines · 77 tokens per session scan A b5f1675824f0

Subscribe to this mod's changes

resend-inbound is a skill published in the GitHub repository MoizIbnYousaf/marketing-cli (31 stars, last pushed 23d ago), licensed MIT. It adds 77 tokens to every session and 2,126 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 1 finding (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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