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FeaturesLet software do the typing•Model Context Protocol & AI

AI That Drafts — You Decide What Goes Out

Drafts from a description, and an API an assistant can hold — both of which stop short of sending.

Model Context Protocol•Invariant #12 Guardrail

Connect AI Agents Safely with Official MCP

Claude, Cursor, ChatGPT, and Gemini connect natively via our streamable HTTP Model Context Protocol endpoint. The AI drafts and proposes; zero money moves and no customer is messaged without signed-in human sign-off.

Try Interactive Prompts:
mcp.billingmart.com/v1Claude Desktop connected
> Prompt:

Draft invoice for 15 hours commercial electrical repair at $95/hr for Northgate Properties

✓ MCP Stream Result:

Drafted INV-104 with 1 line item ($1,425.00). Created as DRAFT. Awaiting human approval.

Invariant #12 Enforced: Write tools create drafts only. A human must confirm dispatch in the BillingMart console before anything sends.
Enforced Platform Capabilities

Included in Let software do the typing

Every feature below is active in production and enforced by server transactions.

AI Studio

  • Invoice template designer

    Professional

    Describe the layout; the preview is drawn by the real renderer. A draft until a person publishes it.

    Server verifiedai-templates
  • Pay page designer

    Professional

    Emits colour values, never CSS, and every one is checked for contrast in both themes before it can be published.

    Server verifiedai-pay-page
  • Assistive copy

    Professional

    Reminder text, line descriptions and payment-plan explanations. Plain text only — tags and links are refused.

    Server verifiedai-copy
  • Business model generator

    Business

    Describe your trade and get a proposed set of terms, presets and invoice fields — every field editable before it saves.

    Server verifiedai-business-model

API and assistants

  • REST API and API keys

    Business

    Fifty-four operations under one OpenAPI document, scoped per key.

    Server verifiedapi-rest
  • Hosted MCP server

    Starter

    Point ChatGPT, Claude or Gemini at your billing. An assistant reads, drafts, records and asks; every send, charge or refund runs only after a signed-in person approves it, or your own capped rule does.

    Server verifiedapi-mcp
  • Auto-approve rules

    Professional

    The owner writes capped rules — kind, amount, count a day — and a matching action runs at once, with the connection as actor. Refunds and every never-auto kind still wait for a person.

    Server verifiedagent-auto
  • Outbound webhooks

    Business

    HMAC-signed, retried and dead-lettered, with the destination re-resolved on every delivery.

    Server verifiedapi-webhooks
  • Approvals inbox

    Business

    Anything an assistant proposes waits here for a person to approve it, in a place the assistant cannot reach.

    Server verifiedapprovals
Next Stage in Product Walk

Run the workspace: Multi-Business, Multi-User Control

Businesses, people, roles and the settings that decide what each of them may do.

Continue to Run the workspace →

Ready to start with Let software do the typing?

Starter is free and stays free forever. Scale to Professional or Business as your billing grows.

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