The Merriam-Webster Dictionary API provides developers with access to comprehensive dictionary and thesaurus content, including definitions, etymologies, audio pronunciations, synonyms, and antonyms.
The Merriam-Webster Dictionary API provides developers with access to comprehensive dictionary and thesaurus content, including definitions, etymologies, audio pronunciations, synonyms, and antonyms. On Nagent, Dictionary Api is exposed as a fully-configurable education integration that any agent can call — 1 action, and API key authentication. No code is required to wire Dictionary Api into your workflow — connect it once via the External Integrations panel and reuse it across every agent you build.
Agent builders use Dictionary Api to automate the kinds of tasks education 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 Dictionary Api 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 Dictionary Api, with input parameters and output schema. Drop these into any step of an agent built in Helix.
DICTIONARY_API_GET_WORD_DEFINITION_V2Retrieve comprehensive dictionary data for a word including definitions, phonetics, etymology, synonyms, and antonyms. Uses the Free Dictionary API (dictionaryapi.dev) - a free, open-source dictionary powered by Wiktionary data. Returns detailed word information including multiple definitions grouped by part of speech, pronunciation audio, example sentences, and related words. Ideal for language learning, writing assistance, and vocabulary exploration. Note: Primarily supports English ('en'). Other languages may have limited coverage.
Input parameters
The word to look up in the dictionary (e.g., 'test', 'serendipity', 'hello')
Two-letter ISO 639-1 language code. Commonly supported: 'en' (English), 'fr' (French), 'de' (German), 'it' (Italian), 'pt' (Portuguese). Default: 'en'
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 81 agents privately built on Nagent that already use Dictionary Api.
Build on Nagent
Connect Dictionary Api 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 Dictionary Api, and click "Connect Now." You'll authenticate with an API key — Nagent handles credential storage and refresh automatically. Once connected, Dictionary Api is available to any agent in your workspace.
No. Nagent provides no-code integration for every tool. Once Dictionary Api is connected, you configure its 1 action directly in the agent builder UI — no API calls, no boilerplate, no schema management.
Helix — Nagent's agentic agent builder — lets you drop Dictionary Api 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 Dictionary Api event fires, the agent kicks off automatically.
Every Dictionary Api 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 Dictionary Api ships with 1 pre-built education action, you can layer custom logic around them inside Helix — pre/post-processing steps, conditional branches, retries, or stitching Dictionary Api together with other connected tools. For deeper customization, talk to our team about Nagent's Agentic AI Lab — forward-deployed engineers who build Dictionary Api-based workflows tailored to your business.