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Agent skill

Pp Resend

by mvanhorn in mvanhorn/printing-press-library

The full Resend API (100 endpoints across emails, broadcasts, audiences, contacts, domains, templates, webhooks)...

Apache-2.0Auto-check: notesBackend & APIs

Install Pp Resend

skills CLI
$ npx skills add mvanhorn/printing-press-library --skill pp-resend -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install mvanhorn/printing-press-library pp-resend --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/mvanhorn/printing-press-library.git skills-src && mkdir -p .claude/skills && cp -r skills-src/cli-skills/pp-resend .claude/skills/pp-resend && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
pp-resend
GitHub stars
2.1k
Token cost
~4.3k tokens
SKILL.md length
1,863 words
Files
1
Skills in repo
506
Repo updated
First seen
Licence
Apache-2.0

At a glance

The full Resend API (100 endpoints across emails, broadcasts, audiences, contacts, domains, templates, webhooks)...

  • Works in 3 steps: Install via the Printing Press… → Verify: resend-pp-cli --version → Ensure the reported install directory is…
  • Phrases: send an email with resend
  • SKILL.md covers Prerequisites: Install the CLI, When to Use This CLI, Unique Capabilities and Command Reference, plus 10 more sections
  • Calls npx, claude and go; needs RESEND_API_KEY

What it does

Pp Resend is an agent skill from mvanhorn/printing-press-library. The full Resend API (100 endpoints across emails, broadcasts, audiences, contacts, domains, templates, webhooks)... Trigger phrases: send an email with resend, check resend deliverability, list resend audiences, what did we send to <email, use resend, run resend.

Its SKILL.md is about 4.3k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Backend & APIs, covering Webhooks and Transactional email. It works with Resend. The repository describes itself as: Official library of CLIs generated by the CLI Printing Press. Endorsed, tested, and community-contributed. The licence is Apache-2.0.

When your agent uses it

  • Phrases: send an email with resend
  • Check resend deliverability
  • List resend audiences
  • What did we send to <email

Example prompts

  • “/pp-resend”

Requirements

  • Node.js
  • Pre-approved tools (allowed-tools): Read, Bash

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

  1. Install via the Printing Press installer. It defaults binaries to $HOME/.local/bin on macOS/Linux and…
  2. Verify: resend-pp-cli --version
  3. Ensure the reported install directory is on $PATH for the agent/runtime that will invoke this skill.

What it can do on your machine

Read from SKILL.md and the folder at commit 76de244. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Bash

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • npx
    • claude
    • go

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use npx, which can reach the network depending on how they are called.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names these keys or tokens, usually read from environment variables:

    • RESEND_API_KEY

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Pp Resend loads about 4.3k tokens when it runs. Until then it costs about 72 tokens; SKILL.md has 1,863 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~72
When it runs · the whole SKILL.md, loaded when a task matches
~4.3k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check: notes

The automated check noted patterns worth knowing about, such as sudo or a known installer.

  • NotePre-approves every shell command (allowed-tools: Bash)SKILL.md
    allowed-tools: Read, Bash

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from mvanhorn/printing-press-library at commit 76de244, republished under its Apache-2.0 licence (© mvanhorn). 1,863 words, ~4,262 tokens.

Download SKILL.mdSave it as .claude/skills/pp-resend/SKILL.md (or your agent's skills folder).
name
pp-resend
description
The full Resend API (100 endpoints across emails, broadcasts, audiences, contacts, domains, templates, webhooks)... Trigger phrases: `send an email with resend`, `check resend deliverability`, `list resend audiences`, `what did we send to <email>`, `use resend`, `run resend`.
allowed-tools
Read, Bash
author
Giuliano Giacaglia
license
Apache-2.0
argument-hint
<command> [args] | install cli|mcp
<!-- GENERATED FILE — DO NOT EDIT.
     This file is a verbatim mirror of library/productivity/resend/SKILL.md,
     regenerated post-merge by tools/generate-skills/. Hand-edits here are
     silently overwritten on the next regen. Edit the library/ source instead.
     See the repository agent guide, section "Generated artifacts: registry.json, cli-skills/". -->

Resend — Printing Press CLI

Prerequisites: Install the CLI

This skill drives the resend-pp-cli binary. You must verify the CLI is installed before invoking any command from this skill. If it is missing, install it first:

  1. Install via the Printing Press installer. It defaults binaries to $HOME/.local/bin on macOS/Linux and %LOCALAPPDATA%\Programs\PrintingPress\bin on Windows:
    bash
    npx -y @mvanhorn/printing-press-library install resend --cli-only
  2. Verify: resend-pp-cli --version
  3. Ensure the reported install directory is on $PATH for the agent/runtime that will invoke this skill.

If the npx install fails (no Node, offline, etc.), fall back to a direct Go install (requires Go 1.26.6 or newer):

bash
go install github.com/mvanhorn/printing-press-library/library/productivity/resend/cmd/resend-pp-cli@latest

If --version reports "command not found" after install, the runtime cannot see the binary directory on $PATH. Do not proceed with skill commands until verification succeeds.

When to Use This CLI

Use this CLI when an agent needs to answer cross-resource questions about a Resend account that the dashboard or SDK cannot answer in one call — what did we send to a specific recipient, which audiences is a contact in, how does broadcast performance trend over time, what's the 7-day bounce rate. Stick with npx resend send for one-shot transactional sends or with React Email for templates; this CLI is the agent-facing companion, not a replacement.

Unique Capabilities

These capabilities aren't available in any other tool for this API.

Cross-resource queries over local state

  • emails to — Every email sent to a single recipient address, with delivery status and timestamps, ordered newest-first.

    Reach for this when an agent needs to reconstruct what a single user has received — support tickets, GDPR exports, dispute investigations.

    bash
    resend-pp-cli emails to <your-email> --json --select id,subject,status,sent_at

  • emails timeline — Collapsed event chain for a single email: sent → delivered → opened → clicked → bounced, in one ordered table.

    Use when debugging 'why didn't this arrive?' — one command shows whether it was sent, delivered, opened, or bounced and when.

    bash
    resend-pp-cli emails timeline 4ef9a417-d4ff-4ec5-9af2-c80a4d5d2c1f --json

  • audiences inventory — Per-audience rollup: contact count, unsubscribed count, last-broadcast timestamp, recent open-rate.

    Use before planning a campaign — quickly see which audiences are healthy and recently engaged.

    bash
    resend-pp-cli audiences inventory --json

  • contacts where — Find every audience, segment, and topic a contact (by email or name) belongs to in one query.

    Use when triaging unsubscribe requests, GDPR deletions, or 'why is bob getting this email?'.

    bash
    resend-pp-cli contacts where <contact-email> --json --select audience_name,subscribed
Aggregate analytics from local store

  • broadcasts performance — Open / click / bounce rate across all broadcasts, sortable; not limited to a single broadcast or 30-day window.

    Use to compare campaign performance across the lifetime of the account.

    bash
    resend-pp-cli broadcasts performance --json --select broadcasts,count,status

  • domains health — Verification + DKIM/SPF/DMARC status across every domain in one table, flags missing or unverified records.

    Use on call-out / deliverability incidents to confirm all sending domains are fully verified.

    bash
    resend-pp-cli domains health --json

  • deliverability summary — Bounce rate, complaint rate, and suppression count over a rolling window (default 7d) computed from local event data.

    Use weekly to monitor IP/domain reputation trends before they cause deliverability incidents.

    bash
    resend-pp-cli deliverability summary --window 7d --json
Operational hygiene

  • api-keys rotation — API keys sorted by age + last-used timestamp (joined from logs); flags stale keys older than N days.

    Use during quarterly security reviews — find unused keys that should be rotated or revoked.

    bash
    resend-pp-cli api-keys rotation --older-than 90d --json

Command Reference

api-keys — Create and manage API Keys through the Resend API.

  • resend-pp-cli api-keys create — Create a new API key
  • resend-pp-cli api-keys delete — Remove an existing API key
  • resend-pp-cli api-keys list — Retrieve a list of API keys

audiences — Deprecated: Use Segments instead. Create and manage Audiences through the Resend API.

  • resend-pp-cli audiences create — Deprecated: Use Segments instead. These endpoints still work, but will be removed in the future.
  • resend-pp-cli audiences delete — Deprecated: Use Segments instead. These endpoints still work, but will be removed in the future.
  • resend-pp-cli audiences get — Deprecated: Use Segments instead. These endpoints still work, but will be removed in the future.
  • resend-pp-cli audiences list — Deprecated: Use Segments instead. These endpoints still work, but will be removed in the future.

automations — Create and manage Automations through the Resend API.

  • resend-pp-cli automations create — Create an automation
  • resend-pp-cli automations delete — Delete an automation
  • resend-pp-cli automations get — Retrieve a single automation
  • resend-pp-cli automations list — Retrieve a list of automations
  • resend-pp-cli automations update — Update an automation

broadcasts — Create and manage Broadcasts through the Resend API.

  • resend-pp-cli broadcasts create — Create a broadcast
  • resend-pp-cli broadcasts delete — Remove an existing broadcast that is in the draft status
  • resend-pp-cli broadcasts get — Retrieve a single broadcast
  • resend-pp-cli broadcasts list — Retrieve a list of broadcasts
  • resend-pp-cli broadcasts update — Update an existing broadcast

contact-properties — Create and manage Contact Properties through the Resend API.

  • resend-pp-cli contact-properties create — Create a new contact property
  • resend-pp-cli contact-properties delete — Remove an existing contact property
  • resend-pp-cli contact-properties get — Retrieve a single contact property
  • resend-pp-cli contact-properties list — Retrieve a list of contact properties
  • resend-pp-cli contact-properties update — Update an existing contact property

contacts — Create and manage Contacts through the Resend API.

  • resend-pp-cli contacts create — Create a new contact
  • resend-pp-cli contacts delete — Remove an existing contact by ID or email
  • resend-pp-cli contacts get — Retrieve a single contact by ID or email
  • resend-pp-cli contacts list — Retrieve a list of contacts
  • resend-pp-cli contacts update — Update a single contact by ID or email

domains — Create and manage domains through the Resend API.

  • resend-pp-cli domains create — Create a new domain
  • resend-pp-cli domains delete — Remove an existing domain
  • resend-pp-cli domains get — Retrieve a single domain
  • resend-pp-cli domains list — Retrieve a list of domains
  • resend-pp-cli domains update — Update an existing domain

emails — Start sending emails through the Resend API.

  • resend-pp-cli emails create — Send an email
  • resend-pp-cli emails create-batch — Trigger up to 100 batch emails at once.
  • resend-pp-cli emails get — Retrieve a single email
  • resend-pp-cli emails get-receiving — Retrieve a single received email
  • resend-pp-cli emails get-receiving-2 — Retrieve a list of attachments for a received email
  • resend-pp-cli emails get-receiving-3 — Retrieve a single attachment for a received email
  • resend-pp-cli emails list — Retrieve a list of emails
  • resend-pp-cli emails list-receiving — Retrieve a list of received emails
  • resend-pp-cli emails update — Update a single email

events — Create and manage Events through the Resend API.

  • resend-pp-cli events create — Create an event
  • resend-pp-cli events create-send — Send an event
  • resend-pp-cli events delete — Delete an event
  • resend-pp-cli events get — Retrieve a single event
  • resend-pp-cli events list — Retrieve a list of events
  • resend-pp-cli events update — Update an event

logs — Retrieve API request logs through the Resend API.

  • resend-pp-cli logs get — Retrieve a single log
  • resend-pp-cli logs list — Retrieve a list of logs

segments — Create and manage Segments through the Resend API.

  • resend-pp-cli segments create — Create a new segment
  • resend-pp-cli segments delete — Remove an existing segment
  • resend-pp-cli segments get — Retrieve a single segment
  • resend-pp-cli segments list — Retrieve a list of segments

templates — Create and manage Templates through the Resend API.

  • resend-pp-cli templates create — Create a template
  • resend-pp-cli templates delete — Remove an existing template
  • resend-pp-cli templates get — Retrieve a single template
  • resend-pp-cli templates list — Retrieve a list of templates
  • resend-pp-cli templates update — Update an existing template

topics — Create and manage Topics through the Resend API.

  • resend-pp-cli topics create — Create a new topic
  • resend-pp-cli topics delete — Remove an existing topic
  • resend-pp-cli topics get — Retrieve a single topic
  • resend-pp-cli topics list — Retrieve a list of topics
  • resend-pp-cli topics update — Update an existing topic

webhooks — Create and manage Webhooks through the Resend API.

  • resend-pp-cli webhooks create — Create a new webhook
  • resend-pp-cli webhooks delete — Remove an existing webhook
  • resend-pp-cli webhooks get — Retrieve a single webhook
  • resend-pp-cli webhooks list — Retrieve a list of webhooks
  • resend-pp-cli webhooks update — Update an existing webhook
Show full SKILL.md (693 more words)Show less
Finding the right command

When you know what you want to do but not which command does it, ask the CLI directly:

bash
resend-pp-cli which "<capability in your own words>"

which resolves a natural-language capability query to the best matching command from this CLI's curated feature index. Exit code 0 means at least one match; exit code 2 means no confident match — fall back to --help or use a narrower query.

Recipes

Reconstruct what a user has received
bash
resend-pp-cli emails to user@example.com --json --select id,subject,status,sent_at,opened_at --limit 50

Use this for support tickets and GDPR exports — every email sent to one recipient, with delivery state.

Pre-campaign audience check
bash
resend-pp-cli audiences inventory --json --select name,contact_count,unsubscribed_count,last_broadcast_at

Run before scheduling a broadcast — surfaces audiences with high unsubscribe rates or stale engagement.

Weekly deliverability review
bash
resend-pp-cli deliverability summary --window 7d --agent --select bounce_rate,complaint_rate,suppression_count

Trend snapshot for IP/domain reputation; pipe through jq to alert on threshold breaches.

Audit stale API keys
bash
resend-pp-cli api-keys rotation --older-than 90d --json --select name,created_at,last_used_at

Find unused keys during quarterly security reviews.

Search every sent email for a phrase
bash
resend-pp-cli search 'password reset' --json --select id,subject,to,sent_at

FTS5-backed; needs sync --full first.

Auth Setup

Run resend-pp-cli auth setup for the URL and steps to obtain a token (add --launch to open the URL). Then store it:

bash
resend-pp-cli auth set-token YOUR_TOKEN_HERE

Or set RESEND_API_KEY as an environment variable.

Run resend-pp-cli doctor to verify setup.

Agent Mode

Add --agent to any command. Expands to: --json --compact --no-input --no-color --yes.

  • Pipeable — JSON on stdout, errors on stderr

  • Filterable — --select keeps a subset of fields. Dotted paths descend into nested structures; arrays traverse element-wise. Critical for keeping context small on verbose APIs:

    bash
    resend-pp-cli api-keys list --agent --select id,name,status

  • Previewable — --dry-run shows the request without sending

  • Offline-friendly — sync/search commands can use the local SQLite store when available

  • Non-interactive — never prompts, every input is a flag

  • Explicit retries — use --idempotent only when an already-existing create should count as success, and --ignore-missing only when a missing delete target should count as success

Response envelope

Commands that read from the local store or the API wrap output in a provenance envelope:

json
{
  "meta": {"source": "live" | "local", "synced_at": "...", "reason": "..."},
  "results": <data>
}

Parse .results for data and .meta.source to know whether it's live or local. A human-readable N results (live) summary is printed to stderr only when stdout is a terminal — piped/agent consumers get pure JSON on stdout.

Agent Feedback

When you (or the agent) notice something off about this CLI, record it:

resend-pp-cli feedback "the --since flag is inclusive but docs say exclusive"
resend-pp-cli feedback --stdin < notes.txt
resend-pp-cli feedback list --json --limit 10

Entries are stored locally at ~/.resend-pp-cli/feedback.jsonl. They are never POSTed unless RESEND_FEEDBACK_ENDPOINT is set AND either --send is passed or RESEND_FEEDBACK_AUTO_SEND=true. Default behavior is local-only.

Write what surprised you, not a bug report. Short, specific, one line: that is the part that compounds.

Output Delivery

Every command accepts --deliver <sink>. The output goes to the named sink in addition to (or instead of) stdout, so agents can route command results without hand-piping. Three sinks are supported:

SinkEffect
stdoutDefault; write to stdout only
file:<path>Atomically write output to <path> (tmp + rename)
webhook:<url>POST the output body to the URL (application/json or application/x-ndjson when --compact)

Unknown schemes are refused with a structured error naming the supported set. Webhook failures return non-zero and log the URL + HTTP status on stderr.

Named Profiles

A profile is a saved set of flag values, reused across invocations. Use it when a scheduled agent calls the same command every run with the same configuration - HeyGen's "Beacon" pattern.

resend-pp-cli profile save briefing --json
resend-pp-cli --profile briefing api-keys list
resend-pp-cli profile list --json
resend-pp-cli profile show briefing
resend-pp-cli profile delete briefing --yes

Explicit flags always win over profile values; profile values win over defaults. agent-context lists all available profiles under available_profiles so introspecting agents discover them at runtime.

Exit Codes

CodeMeaning
0Success
2Usage error (wrong arguments)
3Resource not found
4Authentication required
5API error (upstream issue)
7Rate limited (wait and retry)
10Config error

Argument Parsing

Parse $ARGUMENTS:

  1. Empty, help, or --help → show resend-pp-cli --help output
  2. Starts with install → ends with mcp → MCP installation; otherwise → see Prerequisites above
  3. Anything else → Direct Use (execute as CLI command with --agent)

MCP Server Installation

Install the MCP binary from this CLI's published public-library entry or pre-built release, then register it:

bash
claude mcp add resend-pp-mcp -- resend-pp-mcp

Verify: claude mcp list

Direct Use

  1. Check if installed: which resend-pp-cli If not found, offer to install (see Prerequisites at the top of this skill).
  2. Match the user query to the best command from the Unique Capabilities and Command Reference above.
  3. Execute with the --agent flag:
    bash
    resend-pp-cli <command> [subcommand] [args] --agent
  4. If ambiguous, drill into subcommand help: resend-pp-cli <command> --help.

© mvanhorn, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in cli-skills/pp-resend of mvanhorn/printing-press-library.

Open the folder on GitHubat commit 76de244

Compare with similar skills

Pp Resend next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Pp Resend compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Pp Resend this skillmvanhorn/printing-press-library2.1k—~4.3kAutomated safety check: NotesApache-2.0
ResendAsymmetric-al/core381—~3.6kAutomated safety check: PassMIT
Email Best Practicesviclafouch/meme-studio1107 repos~787Automated safety check: PassNone
Send Emailviclafouch/meme-studio1102 repos~3.8kAutomated safety check: PassNone
Loops APIopeninary/openinary412—~1.1kAutomated safety check: PassAGPL-3.0
E2a Doctortokencanopy/e2a193—~994Automated safety check: PassApache-2.0

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Works with

Categories

Questions about Pp Resend

What does Pp Resend do?

The full Resend API (100 endpoints across emails, broadcasts, audiences, contacts, domains, templates, webhooks)... Pp Resend is an agent skill from mvanhorn/printing-press-library. The full Resend API (100 endpoints across emails, broadcasts, audiences, contacts, domains, templates, webhooks)...

When should I use Pp Resend?

Pp Resend fits situations like: phrases: send an email with resend; check resend deliverability; list resend audiences; what did we send to <email.

How do I install Pp Resend in Claude Code?

Run `npx skills add mvanhorn/printing-press-library --skill pp-resend -a claude-code`. Or copy the skill folder (cli-skills/pp-resend in mvanhorn/printing-press-library) into .claude/skills/pp-resend in your project. Claude Code loads it when a task matches its description.

How do I install Pp Resend in Codex?

Run `npx skills add mvanhorn/printing-press-library --skill pp-resend -a codex`. Or copy the skill folder (cli-skills/pp-resend in mvanhorn/printing-press-library) into .agents/skills/pp-resend in your project. Codex loads it when a task matches its description.

Can I use Pp Resend in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mvanhorn/printing-press-library --skill pp-resend -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/pp-resend, .gemini/skills/pp-resend, .github/skills/pp-resend and .opencode/skills/pp-resend in your project.

What does Pp Resend need to run?

Going by SKILL.md and its folder, Pp Resend needs the command-line tools its instructions call (npx, claude and go) and credentials named RESEND_API_KEY. Our summary lists: Node.js. Its frontmatter pre-approves these tools: Read, Bash.

Does Pp Resend access the network?

SKILL.md contains no URLs. Its commands use npx, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Pp Resend safe to install?

Our automated static check of SKILL.md found notes only (pre-approves every shell command (allowed-tools: bash)), nothing it rates as a warning. It is not a guarantee. Review the folder before installing.

What licence does Pp Resend use?

Pp Resend is published under the Apache-2.0 licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Pp Resend use?

About 4.3k tokens (SKILL.md is roughly 17k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Pp Resend?

Skills that share tags, products or a category with Pp Resend: Resend (Asymmetric-al/core, 381 stars), Email Best Practices (viclafouch/meme-studio, 110 stars), Send Email (viclafouch/meme-studio, 110 stars) and Loops API (openinary/openinary, 412 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Pp Resend?

mvanhorn (a GitHub user) maintains it in mvanhorn/printing-press-library, which has 2,056 GitHub stars. The repository holds 506 skills in this directory. The repository was last updated on October 9, 2026.

Source: mvanhorn/printing-press-library on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.