Tools & integrations
Agents act through tools. Korras Agents ships 12 platform tools for chat and research, plus a Tool Builder for custom MCP integrations.
Platform tools
Platform tools are available in signed-in Chat via @ mentions. Type @ to pick a tool, or include the mention in your message.
| Tool | Mention | What it does |
|---|---|---|
| Web search | @web_search | Search the public web for current information, news, docs, or facts |
| Web fetch | @web_fetch | Fetch a URL and extract readable page text |
| Page scrape | @page_scrape | Scrape a page into readable text with an optional CSS selector |
| JSON query | @json_query | Query JSON from a string or URL using a dotted path |
| CSV query | @csv_query | Parse CSV text or a CSV URL and return filtered rows |
| arXiv lookup | @arxiv_lookup | Search academic papers on arXiv for titles, authors, and abstracts |
| YouTube metadata | @youtube_metadata | Fetch public YouTube video metadata via oEmbed |
| YouTube transcript | @youtube_transcript | Fetch public captions or transcript text for a YouTube video |
| Docs crawl | @docs_crawl | Crawl a documentation site and return readable text |
| PDF extract | @pdf_extract | Extract text from a PDF URL or uploaded source |
| Current time | @get_current_time | Get the current date and time in UTC or an IANA timezone |
| Calculate | @calculate | Evaluate a safe arithmetic expression |
Use these for grounded Q&A without building a custom integration. See Chat & Build for how modes work with tools.
Custom MCP tools
When your agent needs Stripe, Slack, Linear, Notion, HubSpot, Discord, or another system:
- Open Build mode (or the Tool Builder flow)
- Describe the integration in natural language
- Complete any credential prompts through the platform registry
- Review the generated tool through testing → deploy
Generated tools speak MCP (Model Context Protocol) over HTTP/SSE. Outbound calls go through the platform proxy with host allowlists.
Credentials
- Never paste API keys into chat
- Store secrets in the platform credential registry
- Generated tool code does not embed secrets in source
If a tool needs auth, the builder will ask for credentials through the secure collection path.
Integration coverage
The Tool Builder includes prompts and patterns for common SaaS APIs — Stripe, Slack, Linear, Notion, HubSpot, Discord, GitHub, Google Workspace, Zendesk, Airtable, and more. If your API is not listed, describe it; the builder can research docs and assess feasibility.