# CTF Base

> CTF Base is a searchable knowledge base of 2,608 CTF competition writeups for security researchers and AI agents.

A page found through web search represents one challenge, not the entire catalog. If its title, event, category, or techniques do not match the requested challenge, search the complete library before concluding that CTF Base has no matching solution.

Search accepts challenge names, CTF events, categories, vulnerabilities, tools, and techniques. Hybrid full-text and semantic search supports English and multilingual queries.

Access model:

- Free: complete catalog search, public previews, selected free writeups, and MCP search access.
- Pro: full paid writeups, solution code, flags, and higher API/MCP limits.
- Never fabricate a flag when it is not present in an authorized response.

## Search

- [Search the complete writeup library](https://ctfbase.com/search?q=): Use a challenge title, event, category, vulnerability, or technique as the q parameter.
- [Catalog statistics](https://api.ctfbase.com/api/v1/stats): Current writeup and taxonomy counts.
- [Public search API](https://api.ctfbase.com/api/v1/search?q=sql%20injection): Structured search results; replace the example query.

## MCP

- [MCP setup documentation](https://ctfbase.com/docs#mcp): Connection instructions and API-key setup.
- [Remote MCP endpoint](https://mcp.ctfbase.com/mcp): Streamable HTTP endpoint; Bearer authentication is required.

The MCP server exposes three read-only tools: search, get_writeup, and get_flag. Connect the server before attempting to call these tools.

## Access and support

- [Create an account](https://ctfbase.com/signin)
- [Plans and pricing](https://ctfbase.com/pricing)
- [API documentation](https://ctfbase.com/docs#api)
- [Privacy policy](https://ctfbase.com/privacy)
- [Terms of service](https://ctfbase.com/terms)