U301 provides an API to manage all U301 resources, currently under development.
U301 provides an API to manage all U301 resources, currently under development. On Nagent, U301 is exposed as a fully-configurable url shortener integration that any agent can call — 3 actions, and API key authentication. No code is required to wire U301 into your workflow — connect it once via the External Integrations panel and reuse it across every agent you build.
Agent builders use U301 to automate the kinds of tasks url shortener teams previously handled manually. Concrete examples — each one is a single agent step in Nagent — include:
Every action and trigger is paired with a structured input/output schema (visible in the sections below), so when you wire U301 into Helix — our agentic agent builder — the editor knows exactly what each step expects and produces. Configure once, deploy anywhere across your Nagent agents.
Every operation an agent can call against U301, with input parameters and output schema. Drop these into any step of an agent built in Helix.
U301_DELETE_LINKTool to delete a shortened link by its link identifier. Use when you need to remove a shortened link from the system.
Input parameters
The shortened link identifier to delete. Format: domain/code (e.g., 'u301.co/tA82')
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
U301_LIST_SHORTEN_DOMAINSTool to list available domains for URL shortening, including public domains and custom domains. Use when you need to see what domains are available for creating short links. Supports pagination and filtering by visibility type.
Input parameters
Current page number
Results per page, range: 1-500
Enum for domain visibility types.
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
U301_SHORTEN_LINKTool to shorten a long URL into a compact short link. Use after obtaining the long URL when you need a shareable link.
Input parameters
The long URL to be shortened. Must start with a valid schema (http:// or https://)
Custom alias for the short link. Must be unique and only contain letters, numbers, underscores (_), and hyphens (-)
The title of the link
Domain to use for the short URL. You can list available domains using the list domains endpoint
Output
Data from the action execution
Error if any occurred during the execution of the action
Whether or not the action execution was successful or not
No publicly available marketplace agent is found using this tool yet. There are 75 agents privately built on Nagent that already use U301.
Build on Nagent
Connect U301 to any Nagent agent in minutes — no API key management, no boilerplate. Just configure and deploy.
The five questions agent builders ask before adopting a new integration.
Open the External Integrations panel inside Nagent (app.nagent.ai/externalIntegration), find U301, and click "Connect Now." You'll authenticate with an API key — Nagent handles credential storage and refresh automatically. Once connected, U301 is available to any agent in your workspace.
No. Nagent provides no-code integration for every tool. Once U301 is connected, you configure its 3 actions directly in the agent builder UI — no API calls, no boilerplate, no schema management.
Helix — Nagent's agentic agent builder — lets you drop U301 steps into any workflow visually. Pick an action (e.g., one of those listed above), fill in the inputs (Helix knows the required vs. optional schema for each parameter), and connect it to upstream/downstream steps. Triggers run as the entry point of an agent, so when a U301 event fires, the agent kicks off automatically.
Every U301 action and trigger ships with a fully-typed schema — input parameters with name, type, required flag, and description, plus the output payload shape. The schemas are documented in the sections above. Helix uses these schemas to validate your configuration at build time and to type-check the data flowing between steps.
Yes. While U301 ships with 3 pre-built url shortener actions, you can layer custom logic around them inside Helix — pre/post-processing steps, conditional branches, retries, or stitching U301 together with other connected tools. For deeper customization, talk to our team about Nagent's Agentic AI Lab — forward-deployed engineers who build U301-based workflows tailored to your business.