A decision guide for changing the Apple Mail MCP server’s API, including adding tools, parameters, or endpoints. An API is the interface that software uses to request actions from another program.

Use it before adding or changing an Apple Mail MCP tool, parameter, or endpoint, and when reviewing feature requests or API design choices.

It helps evaluate proposed changes and avoid creating unnecessary one-off operations or an overly complicated interface.

How wylieswanson/apple-mail-pz-mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to wylieswanson/apple-mail-pz-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/wylieswanson/apple-mail-pz-mcp/main/.claude/skills/api-design/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/wylieswanson/apple-mail-pz-mcp

Made for: Claude Code.

Or install apple-mail-pz, the plugin that ships this one along with the rest of its 5 skills, 1 command, 3 hooks, 1 MCP server.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/wylieswanson/apple-mail-pz-mcp/api-design/github.svg)](https://agentmods.dev/skills/wylieswanson/apple-mail-pz-mcp/api-design)

Your own site

<a href="https://agentmods.dev/skills/wylieswanson/apple-mail-pz-mcp/api-design"><img src="https://agentmods.dev/badge/skills/wylieswanson/apple-mail-pz-mcp/api-design/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/wylieswanson/apple-mail-pz-mcp/api-design"><img src="https://agentmods.dev/badge/skills/wylieswanson/apple-mail-pz-mcp/api-design.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 818 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.

Origin unknown 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.

Model	Per session	Once invoked
Fable 5.1	$0.00056	$0.00818
Opus 5.5	$0.00022	$0.00327
Sonnet 5.5	$0.00011	$0.00164
Haiku 4.5	$0.00006	$0.00082

Measured 2mo ago against content hash ca3c7a22fdf2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

api-design 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 2mo 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.

.claude/skills/api-design/SKILL.md · 91 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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.

2mo ago First seen · 91 lines · 56 tokens per session scan A ca3c7a22fdf2

Subscribe to this mod's changes

api-design is a skill published in the GitHub repository wylieswanson/apple-mail-pz-mcp (0 stars, last pushed 26d ago), with no licence file. It adds 56 tokens to every session and 818 once invoked, about $0.0002 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 2026-08-31.

Backend and APIs

api-design next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
api-designwylieswanson/apple-mail-pz-mcp	Skill	0	26d ago	none	A	56	Claude Code
mem0-oss-to-platformmem0ai/mem0	Skill	68k	2d ago	Apache-2.0	A	217	Claude Code, Codex
azure-mgmt-botservice-dotnetmicrosoft/skills	Skill	3.2k	yesterday	MIT	A	78	Claude Code
fastapi-router-pymicrosoft/skills	Skill	3.2k	yesterday	MIT	A	46	Claude Code
dev-runtimelangwatch/langwatch	Skill	5.0k	yesterday	Apache-2.0	A	172	Claude Code
api-designericrisco/rsc-harness	Skill	503	2d ago	MIT	A	105	Claude Code, Codex
migrate-segw-to-raparc-mcp/arc-1	Skill	252	yesterday	MIT	A	106	Claude Code

apple-mail-pz-mcp: Skill for Claude Code