The layer between tasks and tools
Capabilities agents can use
Understand what an agent needs before choosing a vendor. Every capability groups comparable, substitutable tools.
Web search
Find relevant, current sources with structured results that an agent can rank and cite.
Compare tools →Browser automation
Navigate interactive sites, execute actions, and collect evidence in a managed browser.
Compare tools →Web extraction
Turn pages and documents into clean, structured, model-ready content.
Compare tools →Code execution
Run generated code in an isolated environment with predictable inputs and outputs.
Compare tools →Deployment
Ship agent applications and services to managed production infrastructure.
Compare tools →Memory and retrieval
Store, retrieve, and rank durable context for agents across sessions.
Compare tools →User communication
Reach users through email, voice, notifications, and other channels.
Compare tools →Workflow automation
Connect tools, trigger durable jobs, and coordinate multi-step work.
Compare tools →Observability and evaluation
Trace agent runs, evaluate outcomes, and diagnose failures in production.
Compare tools →Authentication and secrets
Give agents controlled access to users, services, credentials, and permissions.
Compare tools →How capabilities are organized
A capability describes what an agent must be able to do without prescribing a provider. The comparison pages combine catalog categories, evaluation criteria, task relationships, and primary technical references so teams can shortlist tools against the same requirements.
4agent uses the terminology and machine-readable interface conventions documented by the Model Context Protocol specification and the OpenAPI Specification.