Utilities
Library of prebuilt tools for web search, code execution, and common agent operations.
Letta provides pre-built tools that enable agents to search the web, execute code, and fetch webpage content.
Available Utilities
Section titled “Available Utilities”Search the internet in real-time using Exa’s AI-powered search engine.
agent = client.agents.create( tools=["web_search"], memory_blocks=[{ "label": "persona", "value": "I use web_search for current events and external research." }])Key features:
- AI-powered semantic search
- Category filtering (news, research papers, PDFs, etc.)
- Domain filtering
- Date range filtering
- Highlights and AI-generated summaries
Setup: Works out of the box with the Letta API. Docker requires EXA_API_KEY.
Execute code in a secure sandbox with full network access.
agent = client.agents.create( tools=["run_code"], memory_blocks=[{ "label": "persona", "value": "I use Python for data analysis and API calls." }])Key features:
- Python with 191+ pre-installed packages (numpy, pandas, scipy, etc.)
- JavaScript, TypeScript, R, and Java support
- Full network access for API calls
- Fresh environment per execution (no state persistence)
Setup: Works out of the box with the Letta API. Docker requires E2B_API_KEY.
Fetch and convert webpages to readable text/markdown.
agent = client.agents.create( tools=["fetch_webpage"], memory_blocks=[{ "label": "persona", "value": "I fetch and read webpages to answer questions." }])Key features:
- Converts HTML to clean markdown
- Extracts article content
- Multiple fallback extraction methods
- Optional Exa integration for enhanced extraction
Setup: Works out of the box everywhere. Optional EXA_API_KEY for enhanced extraction.