mailchimp

mailchimp is a skill for Claude Code, Codex from tallclub/matimo. It costs 20 tokens per session (1,156 once invoked), scanned A, original, MIT.

A guide for managing Mailchimp, an email-marketing service, through tools for campaigns, subscriber audiences, templates, and segments.

In plain words
What is it for?
Use it to create, send, schedule, inspect, and list campaigns, and to add, list, or inspect subscribers in an audience.
Why use it?
It groups campaign and subscriber tasks into documented operations and explains the data needed to perform them. This reduces the need to manage Mailchimp manually.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to create, send, schedule, inspect, and list campaigns, and to add, list, or inspect subscribers in an audience.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/tallclub/matimo/mailchimp
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 tallclub/matimo --skill mailchimp
Clone the repo
git clone --depth 1 https://github.com/tallclub/matimo

Made for: Claude Code, Codex.

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 mailchimp

README.md
[![agentmods](https://agentmods.dev/badge/skills/tallclub/matimo/mailchimp/github.svg)](https://agentmods.dev/skills/tallclub/matimo/mailchimp)
Your own site
<a href="https://agentmods.dev/skills/tallclub/matimo/mailchimp"><img src="https://agentmods.dev/badge/skills/tallclub/matimo/mailchimp/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 mailchimp

Your own site · 80×15
<a href="https://agentmods.dev/skills/tallclub/matimo/mailchimp"><img src="https://agentmods.dev/badge/skills/tallclub/matimo/mailchimp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 20 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,156 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
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 $0.00020 $0.01156
Opus 5.5 $0.00008 $0.00462
Sonnet 5.5 $0.00004 $0.00231
Haiku 4.5 $0.00002 $0.00116

Measured 1mo ago against content hash 04dc7caacb45, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mailchimp 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 1mo 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.

python/packages/mailchimp/src/matimo_mailchimp/skills/mailchimp/SKILL.md · 117 lines

How it starts

The opening of the file, as written. The whole thing — 117 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Mailchimp

How to use Matimo's Mailchimp tools for audiences, subscribers and campaigns.

All Available Tools

Tool Purpose Approval
mailchimp-get-lists List audiences (lists) No
mailchimp-get-list-members List an audience's subscribers No
mailchimp-add-list-member Add a subscriber No
mailchimp-update-list-member Change a subscriber's status, email or merge fields No
mailchimp-remove-list-member Archive a subscriber Yes (DELETE)
mailchimp-create-campaign Create a campaign No
mailchimp-send-campaign Send a campaign now Yes

There is no tool to set campaign content, read campaign reports, or list campaigns; do those in Mailchimp.

Authentication

Requires MAILCHIMP_API_KEY. Every tool also takes server_prefix, the data center at the end of the key (abc123-us6 → us6).


Audiences

  • mailchimp-get-lists with server_prefix; optional count (max 1000), offset. Each list's id is the list_id the other tools take.
  • mailchimp-get-list-members with server_prefix, list_id; optional status (subscribed, unsubscribed, pending, cleaned, transactional, archived), count, offset.

Adding a Subscriber

mailchimp-add-list-member with server_prefix, list_id, email_address, status (subscribed, unsubscribed, pending, cleaned), and optional merge_fields, tags.

{
  "server_prefix": "us6",
  "list_id": "abc123",
  "email_address": "[email protected]",
  "status": "pending",
  "merge_fields": { "FNAME": "Alice", "LNAME": "Smith" },
  "tags": ["webinar"]
}

Use pending to send a double opt-in confirmation. Adding an address that is already in the audience fails with Member Exists; use the update tool instead.

Updating or Removing a Subscriber

Both take subscriber_hash: the MD5 of the lowercase email address (md5("[email protected]")).

  • mailchimp-update-list-member with server_prefix, list_id, subscriber_hash, and any of status, email_address, merge_fields.
  • mailchimp-remove-list-member with server_prefix, list_id, subscriber_hash. It archives the member and asks for approval first.

Read the full file on GitHub · 117 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. 1mo ago Changed · -5 lines · -5 tokens per session 04dc7caacb45
  2. 2mo ago First seen · 122 lines · 25 tokens per session scan A e2ffb3b13fa8

Subscribe to this mod's changes

mailchimp is a skill published in the GitHub repository tallclub/matimo (18 stars, last pushed yesterday), licensed MIT. It adds 20 tokens to every session and 1,156 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-08-30.

Related

mailchimp compared with skills from other repositories

mailchimp next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
mailchimptallclub/matimoSkill18yesterdayMITA20Claude Code, Codex
imagegenopenai/codexSkill133kyesterdayApache-2.0A113Codex
playwright-climicrosoft/playwrightSkill99kyesterdayApache-2.0A19Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginnersSkill79k4d agoMITA200Claude Code, Codex
systematic-debuggingobra/superpowersSkill313k3d agoMITA21Claude Code
next-cache-components-adoptionvercel/next.jsSkill143ktodayMITA95Claude Code
next-partial-prefetching-adoptionvercel/next.jsSkill143ktodayMITA103Claude Code