Docs & AI · Official remote MCP server

The Invoice Preflight MCP server,
connected in one click.

Evidence-backed UBL, PDF, and image invoice checks before approval or payment. Connect the official Invoice Preflight MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.

Connect Invoice Preflight free How it works

Free to start · No credit card · No hosting needed

Use this server

Add Invoice Preflight to your AI in one minute

Pick your client. Copy, paste, done — or let gate handle sign-ins and policies for you.

claude mcp add --transport http invoice-preflight https://mcp.dropenginehq.com/api/invoice-mcp

Run in your terminal, then restart Claude Code.

Invoice Preflight · https://mcp.dropenginehq.com/api/invoice-mcp

What you can do

What your AI can do with Invoice Preflight

Real prompts you can type the moment it's connected — no setup, no docs to read.

“Use “invoice_preflight_quote”: FREE, no wallet or document upload: choose the lowest priced Invoice Preflight tool from document type, PDF page count, and optional byte si.”

“Use “invoice_preflight”: Paid invoice check ($0.065 USDC on Base): UBL XML or complete PDF/image invoices up to 3 pages. Compares expected purchase fields and line i.”

“Use “invoice_preflight_10_pages”: Paid invoice OCR ($0.13 USDC on Base): process complete PDF/image invoices up to 10 pages. Oversized PDFs are rejected before OCR. Agent en.”

“Use “invoice_preflight_50_pages”: Paid invoice OCR ($0.475 USDC on Base): process complete PDF/image invoices up to 50 pages. Oversized PDFs are rejected before OCR. Agent e.”

Security check

How secure is the Invoice Preflight MCP server?

Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how Invoice Preflight holds up.

✓ Verified directory serverInvoice Preflight · dropenginehq.com

Official endpoint

Operated by Invoice Preflight (dropenginehq.com) at its documented MCP endpoint — not a third-party mirror or community re-host.

No sign-in needed

This server only exposes public data — no account and no credentials are involved when you connect.

Scanned before it goes live

gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.

Watched for drift

If Invoice Preflight adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.

Run the free scanner on Invoice Preflight's server →

How it works

Connected in three steps

Connect your gate

Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.

Pick Invoice Preflight

Choose Invoice Preflight in the gate directory. No sign-in needed.

Use it anywhere

Invoice Preflight's tools are live in every AI client you've connected — with rules and logging built in.

Connect Invoice Preflight free

Free to start · No credit card · No hosting needed

Straight from the server

The actual tools Invoice Preflight exposes

Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.

invoice_preflight_quote — FREE, no wallet or document upload: choose the lowest priced Invoice Preflight tool from document type, PDF page count, and optional byte si

invoice_preflight — Paid invoice check ($0.065 USDC on Base): UBL XML or complete PDF/image invoices up to 3 pages. Compares expected purchase fields and line i

invoice_preflight_10_pages — Paid invoice OCR ($0.13 USDC on Base): process complete PDF/image invoices up to 10 pages. Oversized PDFs are rejected before OCR. Agent en

invoice_preflight_50_pages — Paid invoice OCR ($0.475 USDC on Base): process complete PDF/image invoices up to 50 pages. Oversized PDFs are rejected before OCR. Agent e

Author

Who runs the Invoice Preflight MCP server?

dropenginehq.com

Homepage More servers from dropenginehq.com →

Own this server? Claim the listing →

Server facts

The Invoice Preflight MCP server at a glance

Endpointhttps://mcp.dropenginehq.com/api/invoice-mcp

Operated byInvoice Preflight (dropenginehq.com)

CategoryDocs & AI

Sign-inNone — public data only

Available in gateYes — one-click connect

Works withClaude, ChatGPT, Cursor & any MCP client

FAQ

Questions, answered

Is there an official Invoice Preflight MCP server?

Yes — Invoice Preflight operates its own remote MCP server at mcp.dropenginehq.com. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.

How do I connect Invoice Preflight to Claude or ChatGPT?

Add gate's gateway URL to your AI client once, then pick Invoice Preflight in the directory. No account or sign-in is needed. From then on, Invoice Preflight's tools are available in every client you've connected to gate.

Do I need to host anything?

No. Invoice Preflight runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.

Is the Invoice Preflight MCP server safe to connect?

It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.