Heffl Free Tools

Free email verification, business calculators, UAE estimates and drafts.

CommunityOnlineNo sign-inGlobalFreeRead-only

What it can do

    What data it sees

    Do you need an account

    No: the server works without sign-in

    Free email verification, business calculators, UAE estimates and drafts. No API key.

    How to connect

    How to connect Heffl Free Tools to Claude

    The server address to paste into Claude settings:

    https://api.heffl.com/api/public-tools/mcp

    1. Open Claude (claude.ai or the desktop app).
    2. Go to Settings → Connectors.
    3. Click Add custom connector.
    4. Paste the server address copied below into Remote MCP server URL and click Add.
    5. In a chat, click + → Connectors and switch the new connector on.

    Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

    Authorization

    After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

    How to connect Heffl Free Tools to ChatGPT

    The server address to paste into ChatGPT settings:

    https://api.heffl.com/api/public-tools/mcp

    1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
    2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
    3. Open Settings → Connectors and click Create.
    4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
    5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
    6. In a new chat open + → Apps/Connectors and enable the connector.

    OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

    Authorization

    On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

    How to connect Heffl Free Tools to Cursor

    The server address to paste into Cursor settings:

    https://api.heffl.com/api/public-tools/mcp

    Fastest: click Open in Cursor below and confirm the prompt.

    Manually:

    1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
    2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
    3. Save the file. The server appears in the MCP list; authorize it there if asked.

    Authorization

    If the service needs sign-in, an authorize button appears next to the server in the MCP list.

    Server tool list (15)

    Raw names from tools/list. Only developers need these.

    email_verifyCheck one email's syntax, mail routing, disposable/free-provider/role flags, and SMTP recipient acceptance. Sends no email. DNS alone does not verify a mailbox. unknown means inconclusive or mailbox not checked; likely_deliverable is evidence, not a delivery guarantee. No login or API key required. Rate limited.
    photography_pricingCalculate session price, costs, profit and per-photo price. Margin is a percentage of selling price; currency-neutral, no conversion. Free, no authentication required. Rate limited.
    freelance_rateCalculate sustainable rates. margin is a percentage buffer added to annual income plus overhead, matching the website. All money must use the same currency. Free, no authentication required. Rate limited.
    agency_pricingCalculate project price from labor, overhead and risk buffer. margin is percentage of selling price; overhead and riskBuffer are percentage additions. Free, no authentication required. Rate limited.
    business_daysCount weekdays between dates or add/subtract days. UTC dates, Monday–Friday; start included and end excluded unless includeEnd. Offset excludes start. Public holidays are not excluded. Free, no authentication required. Rate limited.
    risk_assessmentScore user-supplied risks using likelihood × impact (1–5). Low <=6, medium <=14, high >=15. Does not infer likelihood or impact. Free, no authentication required. Rate limited.
    coaching_agreementGenerate the website's coaching agreement as plain text. Missing text fields use placeholders. Draft only; legal review may be needed. Free, no authentication required. Rate limited.
    retainer_agreementGenerate the website's monthly retainer agreement as plain text. Missing text fields use placeholders. Draft only; legal review may be needed. Free, no authentication required. Rate limited.
    uae_vatEstimate standard 5% UAE VAT in AED, inclusive or exclusive. Does not classify exempt or zero-rated supplies. Free, no authentication required. Rate limited.
    uae_corporate_taxEstimate standard UAE corporate tax on already-adjusted taxable income in AED: 0% up to 375000 and 9% above. Does not determine deductions, free-zone rules, relief or multinational minimum tax. Free, no authentication required. Rate limited.
    uae_gratuityAED estimate for covered private-sector full-time foreign workers using monthly basic salary, at least one year service, 21 days for first five years then 30; capped at 24 months basic salary. Assumes continuous service without unpaid leave; no deductions or alternative schemes assessed. Free, no authentication required. Rate limited.
    uae_real_estate_vatEstimate VAT on ordinary commercial/residential property in AED, not transfer fees. Residential zero-rating requires FIRST supply within three years of completion; other residential supply exempt. No mixed-use or specialist properties. Free, no authentication required. Rate limited.
    quotation_generateGenerate quotation JSON and plain-text draft with percentage discounts per item and tax on discounted amounts. Does not save, send, or render PDF; website provides visual export. Currency is a label, no FX conversion. Free, no authentication required. Rate limited.
    sow_generateGenerate a scope-of-work draft using the existing Heffl DeepSeek service. Returns untrusted HTML, not legal advice. Drafts may infer details; verify before use. Provider configuration required server-side. Free, no authentication required. Rate limited.
    whatsapp_generateGenerate a business WhatsApp message draft using Heffl's DeepSeek service. Only drafts text; never sends messages. Provider configuration required server-side. Free, no authentication required. Rate limited.