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Klaviyo Security Basics · jeremylongshore | DecimalAI

securityby jeremylongshore

Klaviyo Security Basics

jeremylongshore/klaviyo-security-basics

Source jeremylongshore/claude-code-plugins-plus-skills ↗License MIT

Apply Klaviyo security best practices for API key management and access control.

SkillScore100Maintained

Automatic

Security & AppSec packsaasklaviyoemail-marketing

Last verified 8/30/2026

What it changes

Passed 22 of 22 test cases with the skill, and 15 of 22 without it.

Without skill68%

With skill100%

Checks it passed that the model alone missed

Specifies granting read-only scopes for CI test environments.
Specifies assigning read-only API keys to CI/CD test environments.
Specifies passing the public key as the `company_id` query parameter.

and 6 more in the full report

7 fixed15 passed either way0 still failing0 broke

Pass-rate lift: +32 pp
Tokens: +45%
Agent turns: 0%
Response time: -16%

Model gemini-3.6-flashMeasured 8/30/2026v122 of 22 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/jeremylongshore-klaviyo-security-basics/SKILL.md https://app.decimal.ai/s/jeremylongshore-klaviyo-security-basics/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add jeremylongshore-klaviyo-security-basics, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/jeremylongshore-klaviyo-security-basics/ and pins it in .decimal/skills.lock

decimalai skills add jeremylongshore-klaviyo-security-basics

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/jeremylongshore-klaviyo-security-basics/SKILL.md https://app.decimal.ai/s/jeremylongshore-klaviyo-security-basics/SKILL.md

Raw file: /s/jeremylongshore-klaviyo-security-basics/SKILL.md ↗ · machine-readable summary at /s/jeremylongshore-klaviyo-security-basics.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 7 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 7

Prompt

What structural prefix and minimum character length identify a valid Klaviyo Private API key?

What was checked, without and with the skill
Checked	Without skill	With skill
Identifies private API keys as starting with the `pk_` prefix.	Passed	Passed
Identifies private API keys as having a length of at least 40 characters.	Missed	Passed

case-22 · gemini-3.6-flash · 8/30/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md134 lines3 files

Klaviyo Security Basics

Overview

Security best practices for Klaviyo: API key types, OAuth scopes, webhook HMAC-SHA256 signature verification, and secret rotation procedures.

Prerequisites

Klaviyo account with API key access
Understanding of environment variables and secret management
Access to Klaviyo dashboard (Settings > API Keys)

Instructions

Step 1: Understand Key Types

Key Type	Format	Use Case	Sensitivity
Private API Key	`pk_*` (40+ chars)	Server-side REST API	CRITICAL -- never expose client-side
Public API Key	6 alphanumeric chars	Client-side Track/Identify only	Low -- safe in browser JS

Private keys authenticate via Authorization: Klaviyo-API-Key pk_*** header. Public keys pass as company_id query parameter.

Step 2: Store Keys in Environment Variables

Keep every private key and the webhook signing secret out of source: load them from .env (git-ignored) through a validated config loader that throws on a missing secret, so misconfiguration fails at boot instead of at first API call.

// src/config/klaviyo.ts -- validated config loader (skeleton)
export const klaviyoConfig = {
  privateKey: requireEnv('KLAVIYO_PRIVATE_KEY'),        // throws if absent
  publicKey: process.env.KLAVIYO_PUBLIC_KEY || '',
  webhookSecret: process.env.KLAVIYO_WEBHOOK_SIGNING_SECRET || '',
};

Full .env template, .gitignore entries, and the requireEnv helper: implementation.md → Environment Variable Configuration.

Track record

Benchmark

22 / 22

test cases passed, vs 15 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/10/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

jeremylongshore / claude-code-plugins-plus-skills

skills/.curated/klaviyo-security-basics/SKILL.md

View on GitHub ↗

License MITImported 8/10/2026Version v1Bundled 2 files

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

Klaviyo Security Basics

Overview

Prerequisites

Instructions

Step 1: Understand Key Types

Step 2: Store Keys in Environment Variables

Track record

Benchmark

Adoption

SkillSafety

Source

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