Fixer is a currency data API providing real-time and historical exchange rates for 170 world currencies.
Fixer is a currency data API providing real-time and historical exchange rates for 170 world currencies. On Nagent, Fixer is exposed as a fully-configurable developer tools integration that any agent can call — 3 actions, and API key authentication. No code is required to wire Fixer into your workflow — connect it once via the External Integrations panel and reuse it across every agent you build.
Agent builders use Fixer to automate the kinds of tasks developer tools 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 Fixer 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 Fixer, with input parameters and output schema. Drop these into any step of an agent built in Helix.
FIXER_GET_HISTORICAL_RATESTool to get historical exchange rate data for a specific date. Use when you need past currency rates for all or selected currencies.
Input parameters
Three-letter base currency code (defaults to EUR if omitted)
Date for historical rates in YYYY-MM-DD format
List of target currency codes to limit output. If omitted, all available currencies are returned
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
FIXER_GET_LATEST_RATESTool to get real-time exchange rate data for all available or specified currencies. Use when you need current forex rates before performing currency conversions.
Input parameters
The base currency to which exchange rates are relative. Defaults to 'EUR'. Changing the base currency is only available on paid plans.
List of currency codes to limit the response. Provide as a list, e.g., \['USD', 'GBP'\]. If omitted, all available currencies are returned.
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
FIXER_GET_SUPPORTED_SYMBOLSTool to retrieve all supported currency symbols and their full names. Use when you need to display or validate available currencies before performing conversions.
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 52 agents privately built on Nagent that already use Fixer.
Build on Nagent
Connect Fixer 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 Fixer, and click "Connect Now." You'll authenticate with an API key — Nagent handles credential storage and refresh automatically. Once connected, Fixer is available to any agent in your workspace.
No. Nagent provides no-code integration for every tool. Once Fixer 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 Fixer 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 Fixer event fires, the agent kicks off automatically.
Every Fixer 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 Fixer ships with 3 pre-built developer tools actions, you can layer custom logic around them inside Helix — pre/post-processing steps, conditional branches, retries, or stitching Fixer together with other connected tools. For deeper customization, talk to our team about Nagent's Agentic AI Lab — forward-deployed engineers who build Fixer-based workflows tailored to your business.