mailgun-setup SKILL.md skillA
mailgun-setup from vellum-ai/vellum-assistant is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add vellum-ai/vellum-assistant/mailgun-setup@git:20260702.6c6fc7dPins git:20260702.6c6fc7d in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- vellum-ai/vellum-assistant
- Path
skills/mailgun-setup/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260702.6c6fc7d, committed Jul 2, 2026
- First version recorded
- Apr 24, 2026
- Size
- 6,511 bytes
- Repository stars
- 1,467
- License
- MIT
Set up and send emails via a user-provided Mailgun account (BYO email provider).
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
## Overview
Send emails through the user's own Mailgun account. The user provides their Mailgun API key and domain, and you send via their infrastructure.
## Setup
### Step 0: Check Existing Configuration
Before starting, check whether Mailgun is already configured:
```bash
bun skills/mailgun-setup/scripts/check-config.ts
```
The script outputs JSON: `{ "configured": boolean, "hasApiKey": boolean, "hasWebhookKey": boolean, "details": string }`.
- If `configured` is `true` — Mailgun is already set up. Offer to verify the connection or reconfigure.
- If `configured` is `false` — continue to Step 1.
### Step 1: Store the API Key
Run the store script to securely collect the API key:
```bash
bun skills/mailgun-setup/scripts/store-api-key.ts
```
The script opens a secure credential prompt, stores the key, and exits. If it exits 0, the key is stored. Exit code **130** means the user cancelled the prompt — nothing was stored; that's a valid choice, not an error, so ask whether they'd like to try again rather than treating it as a failure. Any other non-zero exit is a real failure. **Never ask for the key in chat.**
…Read the whole file at its exact version.
How to install
mdr add vellum-ai/vellum-assistant/mailgun-setup@sha256:043d6fc064d4e273The line at the top of this page pins the label git:20260702.6c6fc7d, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_rghdpeazuradmlos)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Apr 24, 2026 and Jul 2, 2026, about one every 17 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260702.6c6fc7d latest | 2026-07-02 | 6c6fc7d | 6,511 B | A | view · diff |
| git:20260603.ff934d9 | 2026-06-03 | ff934d9 | 6,275 B | A | view · diff |
| git:20260602.6d9a543 | 2026-06-02 | 6d9a543 | 6,253 B | A | view · diff |
| git:20260430.c8d6aa0 | 2026-04-30 | c8d6aa0 | 6,229 B | A | view · diff |
| git:20260424.05e9d6e | 2026-04-24 | 05e9d6e | 6,513 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (6511 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
vellum-ai/vellum-assistant · 1,467 stars · license MIT · pushed 2026-10-29 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_rghdpeazuradmlos GET https://markdownregistry.com/api/v1/resolve?ref=vellum-ai/vellum-assistant/mailgun-setup GET https://markdownregistry.com/api/v1/blob/043d6fc064d4e27366a4bdbf348c421fedf4d9c1fe406e89b57f879468d8b452
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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