Model Context Protocol

Give your AI assistant real tools, not advice.

Connect 500Toolbox to Claude, Cursor, VS Code or any MCP client and your assistant can convert documents, remove image backgrounds, screenshot pages and check DNS, SSL and SEO - on its own, mid-conversation, from real results.

Works with any MCP client
One config block
Prices visible to the model

Example conversation

Is the SSL certificate on example.com about to expire? And what are its MX records?

ssl-check2 creditsdns-lookup1 credits

The certificate is valid for another 63 days (issued by DigiCert). Mail is handled by two MX hosts with priority 10 and 20 - both resolve correctly.

30tools

100free credits / month

Nothingto install

What is MCP?

The standard way for AI models to use tools

The Model Context Protocol is an open standard that lets an AI assistant call external tools. Without it a model can only tell you how to check a domain’s mail records. With it, the model checks them and answers from the real result.

Our server publishes every endpoint as an MCP tool with its input schema and credit cost, so the assistant knows how to call each one and what it will spend.

You ask

A normal question in Claude, Cursor or your editor.

The model picks a tool

It reads the tool list, schemas and prices.

We run it

On our servers - LibreOffice, Chromium, AI models.

It answers from data

Real output, not a guess. Credits are charged only on success.

Connect

Add it to your AI app in one click

Paste one URL into Claude or ChatGPT, or use the one-click button for Cursor and VS Code. You sign in once - there is no API key to copy and no file to edit.

Server URLhttps://toolkitbackend-j69m.onrender.com/api/v1/mcp/connect

Fastest way

Open Claude connectors

Click "Open Claude connectors" below - claude.ai opens on Settings → Connectors.
Click "Add custom connector". Name: 500Toolbox. URL: use the Copy button above and paste it.
Click Add, then Connect. Sign in to 500Toolbox and click Allow. Done.
In a chat, open the tools menu (the + / sliders icon) and switch 500Toolbox on.

A connector added on claude.ai also appears in the Claude desktop and mobile apps. On Team and Enterprise plans an owner adds it once under Organization settings → Connectors; members then click Connect.

Advanced: connect with an API key (config file or stdio bridge)For clients without sign-in support, or scripts that should use a dedicated key.

Open Cursor Settings → Tools & MCP → New MCP server (this opens mcp.json).
Paste the block, put your key in the header and save.
The server turns green and its tools appear in Agent mode.

~/.cursor/mcp.json

{
  "mcpServers": {
    "toolbox": {
      "url": "https://toolkitbackend-j69m.onrender.com/api/v1/mcp",
      "headers": {
        "Authorization": "Bearer tb_live_your_key"
      }
    }
  }
}

Every config below uses the placeholder tb_live_your_key. Create a real key on the API keys page.

Want your Google Search Console data in Claude or ChatGPT? That is a separate connector that signs in with one click and needs no key. See the Search Console MCP →

Tools

What your assistant gets

Every tool appears automatically once connected. Prices are per call and shown to the model, so it prefers a cheap lookup over an expensive crawl.

Full reference →

Network & DNS

dns-lookup1 credit

DNS Lookup - Resolve A, AAAA, MX, TXT, NS, CNAME or SOA records for a hostname.

ssl-check2 credits

SSL Certificate Check - Inspect a host's TLS certificate: issuer, expiry, subject alternative names and chain.

ip-lookup1 credit

IP Address Lookup - Geolocate an IPv4 or IPv6 address and identify its network operator.

reverse-ip1 credit

Reverse IP Lookup - Find the PTR/reverse DNS hostname an IP address resolves back to.

ping2 credits

Ping Host - Measure latency, jitter and packet loss for a host.

smtp-test3 credits

SMTP Server Test - Diagnose a mail server: connectivity, TLS, certificate and AUTH.

Web & HTTP

http-request2 credits

HTTP Request - Send an HTTP request from our servers and get back status, headers and body.

redirect-chain2 credits

Redirect Chain Tracer - Follow every hop a URL redirects through and report each status code.

broken-links10 credits

Broken Link Checker - Fetch a page, extract its links and report which ones are dead.

web-scrape3 credits

Web Page Scraper - Extract title, metadata, headings, links, images and text from a page.

SEO & Content

seo-meta2 credits

SEO Meta Tag Extractor - Pull title, description, canonical, robots, Open Graph and Twitter Card data from a page.

Hashing & Passwords

hash-text1 credit

Hash Text - Compute an MD5, SHA-1, SHA-256 or SHA-512 digest of a string.

bcrypt-hash2 credits

BCrypt Hash - Hash a password with BCrypt at a chosen work factor.

bcrypt-verify2 credits

BCrypt Verify - Check a plaintext password against a BCrypt hash.

argon2-hash3 credits

Argon2 Hash - Hash a password with Argon2id, the current password-hashing recommendation.

argon2-verify3 credits

Argon2 Verify - Check a plaintext password against an Argon2 hash.

Data & Utility

qr-generate1 credit

QR Code Generator - Generate a QR code PNG for any text or URL.

currency-rates1 credit

Currency Exchange Rates - Fetch current exchange rates for a base currency.

gold-price1 credit

Gold & Silver Price - Live gold or silver price per ounce, gram and tola, with karat breakdown.

Documents

pdf-metadata2 credits

PDF Metadata Reader - Read title, author, producer, dates and page count from a PDF.

word-to-pdf15 credits

Word to PDF - Convert a Word, ODT or RTF document to PDF via LibreOffice.

ppt-to-pdf15 credits

PowerPoint to PDF - Convert a PowerPoint or ODP deck to PDF via LibreOffice.

pdf-to-word20 credits

PDF to Word - Convert a PDF to a DOCX file, keeping layout, tables and fonts.

pdf-to-excel20 credits

PDF to Excel - Extract tables from a PDF into an XLSX workbook.

pdf-to-ppt20 credits

PDF to PowerPoint - Convert a PDF into a PPTX deck, one slide per page.

Images

remove-background25 credits

Remove Background - Remove an image background with AI and return a transparent PNG.

image-upscale30 credits

AI Image Upscale - Enlarge an image 2x or 4x with Real-ESRGAN.

website-screenshot25 credits

Website Screenshot - Render a live web page to a PNG or JPEG with headless Chromium.

html-to-image25 credits

HTML to Image - Render supplied HTML and CSS to a PNG or JPEG with headless Chromium.

watermark-image2 credits

Watermark Image - Stamp text across an image at a chosen position and opacity.

Try asking

Things people ask once it is connected

“What are the MX records for example.com, and is its SSL certificate expiring soon?”

“Convert this Word document to PDF and give me the file.”

“Remove the background from this product photo.”

“Check every link on this page and list the broken ones.”

“Take a full-page screenshot of our pricing page on mobile.”

“Which country is this IP in, and is it a hosting provider?”

Costs & limits

Fair, predictable, visible

Free monthly credits

Plus a welcome grant at sign-up. Enough to evaluate every tool.

Pay only for success

Invalid requests are free and failures on our side are refunded automatically.

Prices reflect real work

A cached DNS answer is 1 credit; a crawl of 31 requests is 10. Every price is explained.

Credits never expire

No subscription, no minimum spend. Packs carry over indefinitely.

FAQ

Questions about the MCP server

Do I need to install anything?

Not for HTTP clients like Cursor, VS Code, Windsurf or Claude Code - they connect to the hosted URL directly. Claude Desktop and other stdio-only clients run a tiny bridge through npx (@500toolbox/mcp), which needs Node.js 18 or newer.

Can I see the tools before I have a key?

Yes. Listing the tools is free and needs no key, so a client connects and shows the whole catalogue. A key is only required to run a tool.

How does the model know what a tool costs?

Each tool description includes its credit price, and the server tells the model to prefer the cheaper tool when either would answer the question.

What happens when I run out of credits?

The call is refused with an "insufficient_credits" message the assistant reads back to you. Nothing is charged. Top up on the billing page or wait for the monthly free credits.

Connect your first client

Detailed setup guide