# cantdown.su

> Ultra-fast, minimalist, and anonymous pastebin, file sharing service, and network debugging utility.

cantdown.su provides instantaneous, anonymous text and file hosting with CLI support, syntax highlighting, and minimal overhead. Designed for developers and autonomous agents requiring fast, lightweight text hosting and network diagnostics.

## Core Services

- [Web Interface](https://cantdown.su/): Minimalist web application for sharing text snippets and uploading files up to 100 MB with drag-and-drop support.
- [API Documentation](https://cantdown.su/api): Plain text developer API guide with cURL examples and JSON schemas.
- [Text Paste Service](https://cantdown.su/paste): POST endpoint for creating anonymous text snippets with syntax detection and custom URLs.
- [File Upload Service](https://cantdown.su/upload): Multipart form-data POST endpoint for hosting files up to 100 MB.

## CLI & Network Utilities

- [Public IP Lookup](https://cantdown.su/ip): Plain text endpoint returning client public IP address (`curl https://cantdown.su/ip`).
- [Country Code Lookup](https://cantdown.su/cc): Plain text endpoint returning client ISO 3166-1 alpha-2 country code (`curl https://cantdown.su/cc`).
- [HTTP Request Headers](https://cantdown.su/headers): JSON endpoint returning all incoming HTTP request headers (`curl https://cantdown.su/headers`).
- [TLS Information](https://cantdown.su/tls): JSON endpoint reporting negotiated TLS version, cipher suite, and round-trip time (`curl https://cantdown.su/tls`).
- [Geolocation Metadata](https://cantdown.su/geo): JSON endpoint providing IP, city, region, coordinates, timezone, and ASN details (`curl https://cantdown.su/geo`).
- [ASN Lookup](https://cantdown.su/asn): Plain text endpoint returning client Autonomous System Number and organization (`curl https://cantdown.su/asn`).
- [User-Agent Echo](https://cantdown.su/user-agent): Plain text endpoint returning client User-Agent string (`curl https://cantdown.su/user-agent`).

## Machine-Readable Resources

- [LLM Discoverability Index](https://cantdown.su/llms.txt): This curated index of essential endpoints and documentation for AI agents and LLMs.
- [Full LLM Context](https://cantdown.su/llms-full.txt): Complete, consolidated developer documentation, cURL examples, and CLI reference.
- [Sitemap](https://cantdown.su/sitemap.xml): XML sitemap listing canonical site URLs and endpoints.
- [Robots Policy](https://cantdown.su/robots.txt): Robot exclusion rules and permissions for AI search crawlers.