Finta Security Basics

What it does

When your agent uses it

• With phrases like finta security
• Finta data privacy

Example prompts

• “finta security”
• “finta data privacy”
• “/finta-security-basics”

Requirements

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

Workflow steps

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

1. 1Grant the smallest practical role to each team member and deal-room participant; remove access when a round, engagement, or contractor…
2. 2Keep credentials out of source control, shell history, tickets, and support attachments. Rotate a credential immediately after suspected…
3. 3Classify contact, valuation, term, cap-table, and document data as sensitive. Export only the fields required for a specific purpose and…
4. 4Verify webhook authenticity before processing an event, record only a redacted event identifier for diagnostics, and make downstream…
5. 5Review connected CRM, email, and automation permissions before enabling a sync; disable a sync that cannot limit fields or recipients.

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
  • 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

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

  • api.trustfinta.com

  Also links to:

  • trustfinta.com
  • 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:

  • FINTA_API_KEY
  • FINTA_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

Finta Security Basics loads about 1.5k tokens when it runs. Until then it costs about 36 tokens; SKILL.md has 457 words of instructions outside code blocks.

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

~36

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

~1.5k

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). 457 words, ~1,473 tokens.

name

finta-security-basics

description

Secure Finta fundraising data and investor information. Trigger with phrases like "finta security", "finta data privacy".

allowed-tools

Read, Grep

compatibility

Designed for Claude Code

version

1.7.0

license

MIT

author

Jeremy Longshore <jeremy@intentsolutions.io>

tags

saas, fundraising-crm, investor-management, finta

function createFintaClient(): { apiKey: string; baseUrl: string } {
  const apiKey = process.env.FINTA_API_KEY;
  if (!apiKey) {
    throw new Error("Missing FINTA_API_KEY — store in secrets manager, never in code");
  }
  // Finta keys access investor contacts and financial terms — treat as highly sensitive
  console.log("Finta client initialized (key suffix:", apiKey.slice(-4), ")");
  return { apiKey, baseUrl: "https://api.trustfinta.com/v1" };
}

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

function verifyFintaWebhook(req: Request, res: Response, next: NextFunction): void {
  const signature = req.headers["x-finta-signature"] as string;
  const secret = process.env.FINTA_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 InvestorContactSchema = z.object({
  investor_id: z.string().uuid(),
  firm_name: z.string().min(1).max(200),
  contact_email: z.string().email(),
  deal_stage: z.enum(["prospect", "contacted", "meeting", "term_sheet", "closed", "passed"]),
  check_size: z.number().positive().optional(),
  valuation_cap: z.number().positive().optional(),
});

function validateInvestorData(data: unknown) {
  return InvestorContactSchema.parse(data);
}

const FINTA_SENSITIVE_FIELDS = ["valuation_cap", "check_size", "term_sheet_url", "cap_table", "investor_email", "phone"];

function redactFintaLog(record: Record<string, unknown>): Record<string, unknown> {
  const redacted = { ...record };
  for (const field of FINTA_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/finta-security-basics of jeremylongshore/tons-of-skills-marketplace.

Open the folder on GitHubat commit cfae287