Hex Security Basics

What it does

When your agent uses it

• Securing API keys
• Implementing least privilege access
• Auditing Hex security configuration
• With phrases like hex security

Example prompts

• “hex security”
• “hex secrets”
• “secure hex”
• “/hex-security-basics”

Requirements

• A credential in HEX_RUN_TOKEN
• A credential in HEX_READ_TOKEN
• Compatibility (from SKILL.md): Designed for Claude Code
• Pre-approved tools (allowed-tools): Read, Write, Grep

Workflow steps

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

1. 1Scope credentials by environment and project, inject them from the secret manager, and deny unknown scope or destination.
2. 2Validate parameters, origin, size, and allowed project before starting a run; quarantine failures with opaque correlation IDs.
3. 3Verify webhook authenticity before parsing, reject stale/replayed events, and store only bounded redacted envelopes.
4. 4Test least-privilege and denied access with sandbox projects after every authorization or client change.
5. 5Revoke suspected credentials immediately, cancel affected runs if integrity is uncertain, and preserve only redacted incident 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
  • Write
  • Grep

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  No scripts in the folder and no shell commands in SKILL.md (its code samples are typescript).

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

• Network

  Links to these hosts (documentation or services it may open):

  • learn.hex.tech
  • owasp.org

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

• Credentials

  Names these keys or tokens, usually read from environment variables:

  • HEX_RUN_TOKEN
  • HEX_READ_TOKEN
  • HEX_WEBHOOK_SECRET

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

• Compatibility

  Designed for Claude Code

  From compatibility in the SKILL.md frontmatter.

Context cost

Hex Security Basics loads about 1.4k tokens when it runs. Until then it costs about 71 tokens; SKILL.md has 381 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~71

When it runs · the whole SKILL.md, loaded when a task matches

~1.4k

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

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). 381 words, ~1,435 tokens.

name

hex-security-basics

description

Apply Hex security best practices for secrets and access control. Use when securing API keys, implementing least privilege access, or auditing Hex security configuration. Trigger with phrases like "hex security", "hex secrets", "secure hex", "hex API key security".

allowed-tools

Read, Write, Grep

compatibility

Designed for Claude Code

version

1.6.0

license

MIT

author

Jeremy Longshore <jeremy@intentsolutions.io>

tags

saas, hex, data, analytics

function createHexClient(scope: "read" | "run"): { token: string; baseUrl: string } {
  const envVar = scope === "run" ? "HEX_RUN_TOKEN" : "HEX_READ_TOKEN";
  const token = process.env[envVar];
  if (!token) {
    throw new Error(`Missing ${envVar} — store in secrets manager, never in code`);
  }
  // Run tokens can trigger queries — use read tokens for monitoring
  console.log(`Hex client initialized with ${scope} scope (token suffix: ${token.slice(-4)})`);
  return { token, baseUrl: "https://app.hex.tech/api/v1" };
}

import crypto from "crypto";
import { Request, Response, NextFunction } from "express";

function verifyHexWebhook(req: Request, res: Response, next: NextFunction): void {
  const signature = req.headers["x-hex-signature"] as string;
  const secret = process.env.HEX_WEBHOOK_SECRET!;
  const expected = crypto.createHmac("sha256", secret).update(req.body).digest("hex");
  if (!signature || !crypto.timingSafeEqual(Buffer.from(signature), Buffer.from(expected))) {
    res.status(401).send("Invalid signature");
    return;
  }
  next();
}

import { z } from "zod";

const HexRunRequestSchema = z.object({
  project_id: z.string().uuid(),
  input_params: z.record(z.string(), z.unknown()).optional(),
  notify_on_completion: z.boolean().default(false),
  update_cache: z.boolean().default(false),
});

function validateHexRunRequest(data: unknown) {
  return HexRunRequestSchema.parse(data);
}

const HEX_SENSITIVE_FIELDS = ["db_connection_string", "query_results", "api_token", "input_params", "export_url"];

function redactHexLog(record: Record<string, unknown>): Record<string, unknown> {
  const redacted = { ...record };
  for (const field of HEX_SENSITIVE_FIELDS) {
    if (field in redacted) redacted[field] = "[REDACTED]";
  }
  return redacted;
}

© 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

Just SKILL.md in skills/.curated/hex-security-basics of jeremylongshore/tons-of-skills-marketplace.

Open the folder on GitHubat commit cfae287