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Agent skill

Instantly Security Basics

by jeremylongshore in jeremylongshore/tons-of-skills-marketplace

Harden Instantly API v2 keys, scopes, tenant boundaries, logs, webhooks, and operational access.

MITAuto-check passedBackend & APIs

Install Instantly Security Basics

skills CLI
$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill instantly-security-basics -a claude-code

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

GitHub CLI
$ gh skill install jeremylongshore/tons-of-skills-marketplace instantly-security-basics --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/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/.curated/instantly-security-basics .claude/skills/instantly-security-basics && 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
instantly-security-basics
GitHub stars
2.8k
Token cost
~1.2k tokens
SKILL.md length
471 words
Files
2 (incl. references)
Skills in repo
3,342
Repo updated
First seen
Licence
MIT

At a glance

Harden Instantly API v2 keys, scopes, tenant boundaries, logs, webhooks, and operational access.

  • Works in 6 steps: Inventory secrets, scopes, members,… → Remove browser exposure, query-string… → Map each call to least-privilege scopes… → …
  • Threat modeling
  • SKILL.md covers Overview, Prerequisites, Tool Discipline and Current Contract, plus 7 more sections
  • Reaches api.instantly.ai

What it does

Instantly Security Basics is an agent skill from jeremylongshore/tons-of-skills-marketplace. Harden Instantly API v2 keys, scopes, tenant boundaries, logs, webhooks, and operational access. Use when threat modeling, reviewing access, or assessing security before launch. Trigger with "secure an Instantly integration", "audit Instantly API keys", or "threat-model Instantly webhooks".

Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/official-docs.md`). Compatibility notes: Designed for Claude Code; live verification requires network access and an approved Instantly workspace and API v2 key

It sits in Backend & APIs, covering Threat modeling and Webhooks. The repository describes itself as: Model-agnostic agent-skills platform with a harness-free canonical layer, verified adapters, and the ccpi package manager. Explore at tonsofskills.com. The licence is MIT.

When your agent uses it

  • Threat modeling
  • Reviewing access
  • Assessing security before launch
  • With secure an Instantly integration

Example prompts

  • “secure an Instantly integration”
  • “audit Instantly API keys”
  • “threat-model Instantly webhooks”
  • “/instantly-security-basics”

Requirements

  • Compatibility (from SKILL.md): Designed for Claude Code; live verification requires network access and an approved Instantly workspace and API v2 key
  • Pre-approved tools (allowed-tools): Read, Glob, Grep, WebFetch, Write, Edit

Workflow steps

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

  1. Inventory secrets, scopes, members, service identities, workspace-group delegation, and webhook destinations.
  2. Remove browser exposure, query-string keys, plaintext configs, and unrestricted environment logging.
  3. Map each call to least-privilege scopes and validate denied operations.
  4. Enforce TLS, request-size bounds, schema validation, idempotency, and payload minimization at webhook receivers.
  5. Review audit logs and establish key rotation/revocation and incident ownership.
  6. Prepare changes with blast radius, approval, verification, and rollback evidence.

What it can do on your machine

Read from SKILL.md and the folder at commit cfae287. 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
    • Glob
    • Grep
    • WebFetch
    • Write
    • Edit

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

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

  • Network

    Hosts in commands or code, which the agent is likely to contact:

    • api.instantly.ai

    Also links to:

    • developer.instantly.ai

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

  • Credentials

    Names no API keys, tokens, secrets or passwords.

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

  • Compatibility

    Designed for Claude Code; live verification requires network access and an approved Instantly workspace and API v2 key

    From compatibility in the SKILL.md frontmatter.

Context cost

Instantly Security Basics loads about 1.2k tokens when it runs, and up to ~1.9k if it reads all its reference files. Until then it costs about 79 tokens; SKILL.md has 471 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~79
When it runs · the whole SKILL.md, loaded when a task matches
~1.2k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~1.9k

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 passed

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.

SKILL.md

The full file from jeremylongshore/tons-of-skills-marketplace at commit cfae287, republished under its MIT licence (© jeremylongshore). 471 words, ~1,174 tokens.

Download SKILL.mdSave it as .claude/skills/instantly-security-basics/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
instantly-security-basics
description
Harden Instantly API v2 keys, scopes, tenant boundaries, logs, webhooks, and operational access. Use when threat modeling, reviewing access, or assessing security before launch. Trigger with "secure an Instantly integration", "audit Instantly API keys", or "threat-model Instantly webhooks".
allowed-tools
Read, Glob, Grep, WebFetch, Write, Edit
compatibility
Designed for Claude Code; live verification requires network access and an approved Instantly workspace and API v2 key
argument-hint
[repository-path] [workspace]
version
1.13.0
author
Jeremy Longshore <jeremy@intentsolutions.io>
license
MIT
tags
saas, instantly, security-basics
model
inherit
effort
high

Instantly Integration Security Baseline

Overview

Produce a verified security baseline with least privilege and explicit remediation approvals. Record assumptions, evidence, approval state, and rollback ownership so another operator can reproduce the result.

Prerequisites

  • The target repository, Instantly workspace, environment, and accountable owner
  • Current security, privacy, compliance, capacity, and change-control requirements
  • An approved API v2 key only when a bounded live verification is necessary

Tool Discipline

Use Read, Glob, and Grep to inspect code, configuration, and evidence. Use WebFetch only for current first-party Instantly documentation and package metadata. Use Write or Edit only when implementation was requested and exact target files are known; never write credentials, lead data, email content, or unrestricted environment output.

Current Contract

  • Keys are bearer credentials displayed once; store them only in approved server-side secret systems.
  • Scopes can be resource/action-specific and revoked through API-key controls.
  • Webhook payloads can contain sensitive lead and message content; the public guide does not establish a signature secret.

Authentication

Use an API v2 key as Authorization: Bearer <key> against https://api.instantly.ai/api/v2. Grant only the endpoint-specific scopes needed, inject the key from an approved server-side secret manager, and never print, persist, commit, or place it in a URL. Treat key creation, rotation, revocation, member changes, workspace delegation, and production access as owner-approved actions.

Instructions

  1. Inventory secrets, scopes, members, service identities, workspace-group delegation, and webhook destinations.
  2. Remove browser exposure, query-string keys, plaintext configs, and unrestricted environment logging.
  3. Map each call to least-privilege scopes and validate denied operations.
  4. Enforce TLS, request-size bounds, schema validation, idempotency, and payload minimization at webhook receivers.
  5. Review audit logs and establish key rotation/revocation and incident ownership.
  6. Prepare changes with blast radius, approval, verification, and rollback evidence.
Show full SKILL.md (190 more words)Show less

Approval Boundaries

Do not create, rotate, reveal, or revoke keys; invite or remove members; delegate across workspaces; connect sending accounts; create or activate campaigns; import or delete leads; change suppression or retention; register, patch, resume, or delete webhooks; alter plans or paid capacity; transmit diagnostics; or perform another production mutation without explicit approval from the accountable owner. Keep diagnosis read-only unless implementation was requested.

Output

Return the workspace-safe scope, files and contracts inspected, exact API v2 routes and required scopes, evidence collected, validation result, sensitive fields redacted, remaining risk, accountable owner, approval state, and rollback or next action.

Error Handling

ConditionResponse
401Stop and verify that the bearer key exists, is current, and was not revoked.
403Stop and compare the operation with its exact required scope; do not broaden to all:all by default.
429Coordinate the workspace-wide budget, honor endpoint overrides, and bound retries.
Schema or tenant mismatchFail closed, preserve redacted evidence, and do not retry a mutation.

Examples

Use a compact handoff that makes scope, mutation authority, and evidence reviewable.

Input:

text
mode=audit; secrets=references-only; webhook-signature=not-assumed

Expected handoff:

text
findings=prioritized; credentials=redacted; changes=awaiting-owner

Resources

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

Files

SKILL.md and 1 other file (references) in skills/.curated/instantly-security-basics of jeremylongshore/tons-of-skills-marketplace.

  • SKILL.md
  • references/official-docs.md

Open the folder on GitHubat commit cfae287

Compare with similar skills

Instantly Security Basics 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.

Instantly Security Basics compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Instantly Security Basics this skilljeremylongshore/tons-of-skills-marketplace2.8k—~1.2kAutomated safety check: PassMIT
Security Threat Modelmajiayu000/spellbook287—~561Automated safety check: PassMIT
Security Threat Modelingdevcodex-labs/devcodex439—~771Automated safety check: PassAGPL-3.0
Sec Checkwaynesutton/markdown-site627—~753Automated safety check: PassMIT
Vibe Fuzz Parser Inputsash1794/vibe-engineering163—~722Automated safety check: PassMIT
Entry Point Analyzeralt-research2/SolidityGuard104—~959Automated safety check: PassCustom licence

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Categories

Questions about Instantly Security Basics

What does Instantly Security Basics do?

Harden Instantly API v2 keys, scopes, tenant boundaries, logs, webhooks, and operational access. Instantly Security Basics is an agent skill from jeremylongshore/tons-of-skills-marketplace. Harden Instantly API v2 keys, scopes, tenant boundaries, logs, webhooks, and operational access.

When should I use Instantly Security Basics?

Instantly Security Basics fits situations like: threat modeling; reviewing access; assessing security before launch; with secure an Instantly integration.

How do I install Instantly Security Basics in Claude Code?

Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill instantly-security-basics -a claude-code`. Or copy the skill folder (skills/.curated/instantly-security-basics in jeremylongshore/tons-of-skills-marketplace) into .claude/skills/instantly-security-basics in your project. Claude Code loads it when a task matches its description.

How do I install Instantly Security Basics in Codex?

Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill instantly-security-basics -a codex`. Or copy the skill folder (skills/.curated/instantly-security-basics in jeremylongshore/tons-of-skills-marketplace) into .agents/skills/instantly-security-basics in your project. Codex loads it when a task matches its description.

Can I use Instantly Security Basics 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 jeremylongshore/tons-of-skills-marketplace --skill instantly-security-basics -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/instantly-security-basics, .gemini/skills/instantly-security-basics, .github/skills/instantly-security-basics and .opencode/skills/instantly-security-basics in your project.

What does Instantly Security Basics need to run?

SKILL.md names no scripts, command-line tools or credentials: Instantly Security Basics is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Glob, Grep, WebFetch, Write, Edit. Compatibility (from SKILL.md): Designed for Claude Code; live verification requires network access and an approved Instantly workspace and API v2 key.

Does Instantly Security Basics access the network?

SKILL.md names 2 domains. In commands or code: api.instantly.ai; the agent is likely to contact it when it follows the instructions. As links in the text: developer.instantly.ai. This is read from the text; nothing was executed.

Is Instantly Security Basics safe to install?

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.

What licence does Instantly Security Basics use?

Instantly Security Basics is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Instantly Security Basics use?

About 1.2k tokens (SKILL.md is roughly 4.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 688 tokens, read only when the agent opens those files.

What are the alternatives to Instantly Security Basics?

Skills that share tags, products or a category with Instantly Security Basics: Security Threat Model (majiayu000/spellbook, 287 stars), Security Threat Modeling (devcodex-labs/devcodex, 439 stars), Sec Check (waynesutton/markdown-site, 627 stars) and Vibe Fuzz Parser Inputs (ash1794/vibe-engineering, 163 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Instantly Security Basics?

jeremylongshore (a GitHub user) maintains it in jeremylongshore/tons-of-skills-marketplace, which has 2,827 GitHub stars. The repository holds 3,342 skills in this directory. The repository was last updated on October 10, 2026.

Source: jeremylongshore/tons-of-skills-marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.