presend-source

Presend — Free Privacy Tools, a Security API, and an MCP Server for AI Agents

Presend checks npm and PyPI packages before they are installed: typosquats, known vulnerabilities of the version you use, publisher changes (npm), and names that do not exist or were first published in the last 30 days. It is available as a free API, an MCP server for AI agents and a GitHub Action. The site also has free browser tools; the file tools process files locally.

Open Presend · API docs · OpenAPI spec · MCP server · Measurements · For teams

Why Presend?

• Before an agent installs a package -- the MCP tool supply_chain_check reports package_not_found for a name that does not exist on npm or PyPI (it may be invented by a model) and new_package for one first published less than 30 days ago.
• Measured false alarms -- the typosquat check is measured on the most downloaded PyPI packages and the npm-high-impact list, with the scripts to reproduce it: see the measurements page.
• Real supply-chain signal (API) -- maintainer-change-check flags a package recently taken over by a previously unseen publisher after a long dormancy (the event-stream pattern; it does not detect hijacked existing accounts).
• What it is not -- not a malware scanner: it reports signals worth a look before installing, it does not analyse package code.
• No account -- the API and the MCP server are free, with no signup and no key; per-minute rate limits apply. A paid offer for teams is being tested: Presend for teams.
• Browser file tools -- the file tools (EXIF, PDF, images, office files) run locally with Web Crypto, Canvas and FileReader. A few other tools rely on a network service (speech recognition, password breach lookup, link preview...); the privacy page lists each one.
• PWA -- install on mobile or desktop.

API & MCP Server

• REST API -- free endpoints: supply-chain checks (typosquat, vulnerabilities of a given version, maintainer change, repository health, and a combined supply-chain check), DNS and WHOIS lookups, email checks, JWT decode and verify, file and image processing, and everyday utilities. Full OpenAPI 3.0 spec.
• MCP server -- the same checks as tools over Streamable HTTP, no signup, no key; listed in the official MCP registry as io.github.presendapp/presend-mcp.
• npm client -- npm install presend-api, zero-dependency.
• GitHub Action -- checks the dependencies of package.json or requirements.txt in CI (npm and PyPI).
• Code examples -- working Python for LangChain, CrewAI, LlamaIndex, OpenAI Agents SDK, Google ADK, and plain REST.
• MCP config guides -- copy-paste setup for Claude Desktop, Claude Code, Cursor, and Windsurf, no code required.
• Browser extension -- "Presend — Clean Photos", strips EXIF/GPS on right-click.

Python: Cloudflare rejects the default urllib User-Agent (Python-urllib/3.x) with 403 error code: 1010. Set an explicit one, e.g. urllib.request.Request(url, headers={"User-Agent": "my-app/1.0"}). requests, curl and Node are not affected.

Browser Tools (48 total, 22 shown below)

Tool	What it does	Link
EXIF Remover	Strip GPS, camera model, timestamps from photos	Open
PDF Metadata Remover	Remove author, software, dates from PDFs	Open
Image Compressor	Shrink JPG/PNG/WebP with quality preview	Open
PDF Compress	Reduce PDF file size without quality loss	Open
PDF Merger	Combine multiple PDFs into one document	Open
Image Resizer	Resize to exact dimensions (Instagram, LinkedIn, Twitter)	Open
HEIC to JPG Converter	Convert iPhone photos to universal JPG	Open
Video Metadata Remover	Strip GPS and device data from MP4/MOV	Open
Office Metadata Remover	Clean Word, Excel, PowerPoint hidden data	Open
File Hash Checker	Verify SHA-256, SHA-1, SHA-512 checksums	Open
Password Generator	Create cryptographically secure passwords	Open
Password Strength	Analyze password entropy and crack time	Open
QR Code Generator	Generate QR codes for URLs, WiFi, text	Open
URL Cleaner	Remove tracking parameters (UTM, fbclid, gclid)	Open
Email List Cleaner	Deduplicate, validate, clean email lists	Open
JSON to CSV Converter	Convert between JSON and CSV instantly	Open
Image to Base64	Encode images for embedding in HTML/CSS	Open
Text Diff	Compare two texts side by side	Open
Text Formatter	Bold, italic, stylized text for social media	Open
Thread Splitter	Split long text into Twitter/X threads	Open
Word Counter	Count words, characters, reading time	Open
Color Contrast	Check WCAG accessibility contrast ratios	Open

SEO and Performance

Presend is built for search engines and AI assistants:

• Schema.org: structured data on the pages (Organization, FAQPage, BreadcrumbList...)
• Sitemap: a static sitemap.xml covering the tools, blog and guides in 8 languages
• Dynamic OG Images: API generates social preview images per tool
• Core Web Vitals: Preconnect, DNS-prefetch, CSS preload, zero render-blocking JS
• PWA: Service worker + manifest for offline use and installability
• Privacy-First Analytics: Cloudflare Web Analytics (no cookies, no IP tracking)

Embed on Your Site

Add a Presend tool to your website or link back to us:

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Tech Stack

• Frontend: Vanilla HTML5, CSS3, ES6 (zero build step)
• Hosting: Cloudflare Pages (200+ edge locations)
• APIs: Cloudflare Workers (share links, analytics, sitemap, OG images)
• Storage: Cloudflare KV (share links, 30-day TTL)
• PWA: Service Worker + Web App Manifest

License

MIT — free to use, modify, and embed.

Open Presend