Cold Outbound Optimizer
ericosiu/ai-marketing-skills
Design, analyze, and optimize cold outbound email campaigns for Instantly.
Manage Mailtrap contacts, lists, segments, custom fields, imports, CRM syncs, and campaign audiences through the UI or API.
$ npx skills add sickn33/agentic-awesome-skills --skill mailtrap-managing-contacts -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install sickn33/agentic-awesome-skills mailtrap-managing-contacts --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/mailtrap-managing-contacts .claude/skills/mailtrap-managing-contacts && rm -rf skills-srcUse ~/.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/
Install the "mailtrap-managing-contacts" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/mailtrap-managing-contacts into .claude/skills/mailtrap-managing-contacts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mailtrap-managing-contacts", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/mailtrap-managing-contactsType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add sickn33/agentic-awesome-skills --skill mailtrap-managing-contacts -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install sickn33/agentic-awesome-skills mailtrap-managing-contacts --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/mailtrap-managing-contacts .agents/skills/mailtrap-managing-contacts && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "mailtrap-managing-contacts" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/mailtrap-managing-contacts into .agents/skills/mailtrap-managing-contacts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mailtrap-managing-contacts", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add sickn33/agentic-awesome-skills --skill mailtrap-managing-contacts -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install sickn33/agentic-awesome-skills mailtrap-managing-contacts --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/mailtrap-managing-contacts .cursor/skills/mailtrap-managing-contacts && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "mailtrap-managing-contacts" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/mailtrap-managing-contacts into .cursor/skills/mailtrap-managing-contacts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mailtrap-managing-contacts", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/sickn33/agentic-awesome-skills.git --path skills/mailtrap-managing-contacts--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add sickn33/agentic-awesome-skills --skill mailtrap-managing-contacts -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install sickn33/agentic-awesome-skills mailtrap-managing-contacts --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/mailtrap-managing-contacts .gemini/skills/mailtrap-managing-contacts && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "mailtrap-managing-contacts" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/mailtrap-managing-contacts into .gemini/skills/mailtrap-managing-contacts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mailtrap-managing-contacts", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install sickn33/agentic-awesome-skills mailtrap-managing-contactsInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add sickn33/agentic-awesome-skills --skill mailtrap-managing-contacts -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/mailtrap-managing-contacts .github/skills/mailtrap-managing-contacts && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "mailtrap-managing-contacts" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/mailtrap-managing-contacts into .github/skills/mailtrap-managing-contacts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mailtrap-managing-contacts", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add sickn33/agentic-awesome-skills --skill mailtrap-managing-contacts -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install sickn33/agentic-awesome-skills mailtrap-managing-contacts --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sickn33/agentic-awesome-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/mailtrap-managing-contacts .opencode/skills/mailtrap-managing-contacts && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "mailtrap-managing-contacts" agent skill from https://github.com/sickn33/agentic-awesome-skills/tree/main/skills/mailtrap-managing-contacts into .opencode/skills/mailtrap-managing-contacts/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "mailtrap-managing-contacts", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
mailtrap-managing-contactsManage Mailtrap contacts, lists, segments, custom fields, imports, CRM syncs, and campaign audiences through the UI or API.
Mailtrap Managing Contacts is an agent skill from sickn33/agentic-awesome-skills. Manage Mailtrap contacts, lists, segments, custom fields, imports, CRM syncs, and campaign audiences through the UI or API.
Its SKILL.md is about 1.9k 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 Sales & Support. The repository describes itself as: AAS Core is the local, agent-first control plane for complete catalog discovery, agent-owned selection, stack validation, and planning, backed by 2,400+ agentic skills. Includes… The licence is MIT.
Read from SKILL.md and the folder at commit b84d35a. It shows what the files ask for, not the result of running them.
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Shell commands in SKILL.md call:
curlFrom the folder's file list and the shell code blocks in SKILL.md.
Hosts in commands or code, which the agent is likely to contact:
mailtrap.ioAlso links to:
docs.mailtrap.iogithub.comFrom URLs in SKILL.md, links to its own repository left out.
Names these keys or tokens, usually read from environment variables:
MAILTRAP_API_TOKENFrom names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Mailtrap Managing Contacts loads about 1.9k tokens when it runs. Until then it costs about 38 tokens; SKILL.md has 428 words of instructions outside code blocks.
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.
The automated check found no risky patterns in SKILL.md.
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.
The full file from sickn33/agentic-awesome-skills at commit b84d35a, republished under its MIT licence (© sickn33). 428 words, ~1,852 tokens.
.claude/skills/mailtrap-managing-contacts/SKILL.md (or your agent's skills folder).Before generating API request bodies: check the Contacts OpenAPI spec for current field names, required parameters, and nested structures.
Contacts are the marketing database: lists, segments, custom fields, and imports for campaign audiences and related workflows. The Contacts API automates create/update and can feed CRM or CDP sync (your code, or tools like Zapier, Make, n8n — see Import contacts).
Suppressions (hard bounces, spam complaints, unsubscribes on the sending side) live in the sending product and block delivery for those addresses on your streams. That is applied separately from marketing filters (segments, list membership, consent flags) that decide who is eligible for campaigns. For sending-side blocks, see Suppressions and mailtrap-sending-emails.
Related skills: mailtrap-sending-emails (live send paths).
All endpoints below need Authorization: Bearer $MAILTRAP_API_TOKEN and an $MAILTRAP_ACCOUNT_ID in the path. Resolve $MAILTRAP_ACCOUNT_ID from GET https://mailtrap.io/api/accounts, and store tokens in environment variables or a secrets manager.
| Action | Method | URL | Reference |
|---|---|---|---|
| Create / get / update / delete contact | various | https://mailtrap.io/api/accounts/$MAILTRAP_ACCOUNT_ID/contacts | Contacts |
| Bulk import (async job) | POST | https://mailtrap.io/api/accounts/$MAILTRAP_ACCOUNT_ID/contacts/imports | Bulk import |
| Contact lists | various | https://mailtrap.io/api/accounts/$MAILTRAP_ACCOUNT_ID/contacts/lists | Contact lists |
| Custom fields | various | https://mailtrap.io/api/accounts/$MAILTRAP_ACCOUNT_ID/contacts/fields | Contact fields |
| Custom events | POST | https://mailtrap.io/api/accounts/$MAILTRAP_ACCOUNT_ID/contacts/{contact_identifier}/events | Contact events |
| Export contacts | various | https://mailtrap.io/api/accounts/$MAILTRAP_ACCOUNT_ID/contacts/exports | Export contacts |
GET .../contacts/imports/{import_id}. See Bulk import.curl)curl -X POST "https://mailtrap.io/api/accounts/$MAILTRAP_ACCOUNT_ID/contacts" \
-H "Authorization: Bearer $MAILTRAP_API_TOKEN" \
-H 'Content-Type: application/json' \
-d '{
"contact": {
"email": "john.smith@example.com",
"fields": {"first_name": "John", "last_name": "Smith", "company": "Example Inc"},
"list_ids": [1, 2, 3]
}
}'curl -X POST "https://mailtrap.io/api/accounts/$MAILTRAP_ACCOUNT_ID/contacts/imports" \
-H "Authorization: Bearer $MAILTRAP_API_TOKEN" \
-H 'Content-Type: application/json' \
-d '{
"contacts": [
{"email": "user1@example.com", "fields": {"first_name": "John"}, "list_ids_included": [1, 2]},
{"email": "user2@example.com", "fields": {"first_name": "Jane"}, "list_ids_included": [1]}
]
}'curl -X POST "https://mailtrap.io/api/accounts/$MAILTRAP_ACCOUNT_ID/contacts/{contact_identifier}/events" \
-H "Authorization: Bearer $MAILTRAP_API_TOKEN" \
-H 'Content-Type: application/json' \
-d '{"name": "UserLogin", "params": {"user_id": 101, "is_active": true}}'POST .../events with an event name and params object for automations.Contacts power marketing campaigns: you maintain clean lists, consent, and attributes here; campaign authoring and scheduling are product features documented in Campaigns.
| Mistake | Fix |
|---|---|
| Hitting rate limits with one-by-one creates | Use /contacts/imports for bulk loads (respect 50k per request) and backoff |
| Treating marketing contacts as sending suppressions | Use Suppressions for blocked recipients on send streams |
© sickn33, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Just SKILL.md in skills/mailtrap-managing-contacts of sickn33/agentic-awesome-skills.
Open the folder on GitHubat commit b84d35a
We found 5 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in sickn33/agentic-awesome-skills, which our catalogue first saw on October 7, 2026.
Mailtrap Managing Contacts 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Mailtrap Managing Contacts this skillsickn33/agentic-awesome-skills | 47k | 1 repos | ~1.9k | Automated safety check: Pass | MIT | |
| Cold Outbound Optimizerericosiu/ai-marketing-skills | 3.6k | 1 repos | ~1.7k | Automated safety check: Pass | MIT | |
| Doc Coauthoringaws-samples/sample-strands-agent-with-agentcore | 195 | 40 repos | ~3.2k | Automated safety check: Pass | MIT | |
| Amazon Buy Box Monitorbrowser-act/skills | 6.1k | 1 repos | ~1.6k | Automated safety check: Pass | MIT | |
| Review Analysisliangdabiao/amazon-sorftime-research-MCP-skill | 959 | 1 repos | ~2.5k | Automated safety check: Pass | None | |
| Deskcomm Extensaomelgarafael/DeskcommCRM | 4.5k | — | ~2.7k | Automated safety check: Pass | MIT |
ericosiu/ai-marketing-skills
Design, analyze, and optimize cold outbound email campaigns for Instantly.
aws-samples/sample-strands-agent-with-agentcore
Guide users through a structured workflow for co-authoring documentation.
browser-act/skills
Pulls Amazon product details, competing seller prices and seller ratings for a given ASIN through the BrowserAct API, without browser automation.
liangdabiao/amazon-sorftime-research-MCP-skill
对亚马逊商品评论进行深度分析,自动识别产品痛点、分析退货原因,生成改进建议和客服回复模板。Invoke when user uses /review-analysis command with a product ASIN.
melgarafael/DeskcommCRM
Guia para criar uma extensão do DeskcommCRM — o pacote declarativo — em vez de abrir um PR no núcleo.
tourmind-com/Tourmind-Booking-Skills
MUST USE for any hotel or accommodation intent in any language, including hotel search, hotel recommendations, nearby accommodation, hostels, guesthouses, resorts, where-to-stay questions, room…
sickn33/agentic-awesome-skills
Implements an interface in one of two named color modes, iridescent white or colorful black, from a parameterized starter that reports measured color intensity.
sickn33/agentic-awesome-skills
Saves a user's project decisions, rules and preferences into a project-local mdbase so later sessions and other agents can recover the intent.
sickn33/agentic-awesome-skills
Keeps project decisions, research and verified results available across coding-agent sessions through LWC memory, a document Wiki graph and a CodeGraph code index.
sickn33/agentic-awesome-skills
Guides an agent through assessing its own owner for cofounder fit, publishing an approved profile, and ranking complementary profiles other agents published for their owners.
sickn33/agentic-awesome-skills
Integracao com WhatsApp Business Cloud API (Meta). An agent skill from sickn33/agentic-awesome-skills.
sickn33/agentic-awesome-skills
Acts as a proxy for the Cline CLI, dispatching coding tasks one at a time, monitoring runs by hard evidence, relaying decisions to you and learning per-project preferences.
Categories
Manage Mailtrap contacts, lists, segments, custom fields, imports, CRM syncs, and campaign audiences through the UI or API. Mailtrap Managing Contacts is an agent skill from sickn33/agentic-awesome-skills. Manage Mailtrap contacts, lists, segments, custom fields, imports, CRM syncs, and campaign audiences through the UI or API.
Mailtrap Managing Contacts fits situations like: sales & Support work in your project.
Run `npx skills add sickn33/agentic-awesome-skills --skill mailtrap-managing-contacts -a claude-code`. Or copy the skill folder (skills/mailtrap-managing-contacts in sickn33/agentic-awesome-skills) into .claude/skills/mailtrap-managing-contacts in your project. Claude Code loads it when a task matches its description.
Run `npx skills add sickn33/agentic-awesome-skills --skill mailtrap-managing-contacts -a codex`. Or copy the skill folder (skills/mailtrap-managing-contacts in sickn33/agentic-awesome-skills) into .agents/skills/mailtrap-managing-contacts in your project. Codex loads it when a task matches its description.
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add sickn33/agentic-awesome-skills --skill mailtrap-managing-contacts -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/mailtrap-managing-contacts, .gemini/skills/mailtrap-managing-contacts, .github/skills/mailtrap-managing-contacts and .opencode/skills/mailtrap-managing-contacts in your project.
Going by SKILL.md and its folder, Mailtrap Managing Contacts needs the command-line tools its instructions call (curl) and credentials named MAILTRAP_API_TOKEN. Our summary lists: A credential in MAILTRAP_API_TOKEN.
SKILL.md names 3 domains. In commands or code: mailtrap.io; the agent is likely to contact it when it follows the instructions. As links in the text: docs.mailtrap.io and github.com. This is read from the text; nothing was executed.
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
Mailtrap Managing Contacts is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
About 1.9k tokens (SKILL.md is roughly 7.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
Skills that share tags, products or a category with Mailtrap Managing Contacts: Cold Outbound Optimizer (ericosiu/ai-marketing-skills, 3.6k stars), Doc Coauthoring (aws-samples/sample-strands-agent-with-agentcore, 195 stars), Amazon Buy Box Monitor (browser-act/skills, 6.1k stars) and Review Analysis (liangdabiao/amazon-sorftime-research-MCP-skill, 959 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
sickn33 (a GitHub user) maintains it in sickn33/agentic-awesome-skills, which has 47,405 GitHub stars. The repository holds 1,497 skills in this directory. The repository was last updated on October 9, 2026.
Source: sickn33/agentic-awesome-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.