withoneai CurrencyBeacon through One
CurrencyBeacon is a developer-focused currency exchange rate API that provides REST endpoints for latest, conversion, historical, timeseries, and currency data, with SDK-ready JSON, code samples, and an optional MCP server for AI clients to access the same exchange-rate workflows.
One exposes CurrencyBeacon through four MCP tools. The table below carries real action ids from One's knowledge base, so for a common operation you can skip search and go straight to reading the action's parameters.
How to run an action
- Find the action in the table below, or call
search_one_platform_actionswith platformcurrency-beaconif it is not listed. - Call
get_one_action_knowledgewith the action id. Do this every time, including for actions in this table. The table gives you the id, not the parameters. - Call
execute_one_actionwith parameters copied from that knowledge.
Never guess a parameter name, a body field, or an enum value. The knowledge has the real schema, and a guessed field is either a 400 or a silent write of the wrong thing.
Before you start
Call list_one_integrations once and confirm CurrencyBeacon is connected. If it is missing, the user has not connected it: say so and point them at https://app.withone.ai rather than reaching for raw HTTP.
Each connection carries an access field. If it reports {"policy": "methods", "methods": ["GET"]} the agent is read-only here, so plan a read-only answer instead of attempting a write that will be refused.
Before a write
Creates, updates, deletes and sends land on a real CurrencyBeacon account and cannot be recalled. State the action and the specific target in one line before the first write in a task, and let the user stop you. Reads need no confirmation.
Actions
TimeSeriesData
| Action | Method | Path | Action id |
|---|---|---|---|
| Get Time-Series Data | GET | /v1/timeseries |
conn_mod_def::GMjQy4XgQpg::m5xCw3dPTKKWNfO03tARxg |
HistoricalRates
| Action | Method | Path | Action id |
|---|---|---|---|
| Retrieve Historical Rates | GET | /v1/historical |
conn_mod_def::GMjQy4fghzg::_ogoVJ76RiqK89L78uDFHA |
Currencies
| Action | Method | Path | Action id |
|---|---|---|---|
| Supported Currencies | GET | /v1/currencies |
conn_mod_def::GMjQy4xvSqA::BlzI-oeaQPSw-02qmEpyHw |
ExchangeRates
| Action | Method | Path | Action id |
|---|---|---|---|
| Get Latest Exchange Rates | GET | /v1/latest |
conn_mod_def::GMjQy4_NlLg::lYTl6Nw9TEeP9-13vhKekA |
CurrencyConversion
| Action | Method | Path | Action id |
|---|---|---|---|
| Convert Currency | GET | /v1/convert |
conn_mod_def::GMjQy7dfdrg::hCdQTVvQQCaaQyr8JsU45A |
When a call fails
The error comes from CurrencyBeacon, not from One. A 400 or 422 means your parameters do not match the schema, so re-read the knowledge and fix the field. A 401 or 403 means the connection needs re-authorizing, which no retry will fix. A 404 means the id is not on this account. A 429 means slow down. Never retry a write more than once: the first attempt may have landed.
Full catalog: https://www.withone.ai/knowledge/currency-beacon
Integration knowledge by One (withone.ai), licensed under One-Knowledge-1.0. Attribution must be preserved in derivative works.