Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add withoneai/one-agent-plugin --skill currency-beacongit clone --depth 1 https://github.com/withoneai/one-agent-pluginWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/withoneai/one-agent-plugin/currency-beacon)<a href="https://agentmods.dev/skills/withoneai/one-agent-plugin/currency-beacon"><img src="https://agentmods.dev/badge/skills/withoneai/one-agent-plugin/currency-beacon/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/withoneai/one-agent-plugin/currency-beacon"><img src="https://agentmods.dev/badge/skills/withoneai/one-agent-plugin/currency-beacon.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00119 | $0.01067 |
| Opus 5 | $0.00060 | $0.00534 |
| Sonnet 5 | $0.00024 | $0.00213 |
| Haiku 4.5 | $0.00012 | $0.00107 |
Grade A, and why
currency-beacon scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 75 lines — stays where its author put it; the contents beside it link to each section on GitHub.
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
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 5d ago First seen · 75 lines · 0 tokens per session scan A 81dae5fd7510
currency-beacon is a skill published in the GitHub repository withoneai/one-agent-plugin (1 stars, last pushed 19d ago), licensed MIT. It adds 119 tokens to every session and 1,067 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
Other skills, from other repositories
tushare
A Python interface for Tushare, a financial data service that provides market and company information for stocks, funds, futures, and digital assets. It returns queried data as pandas tables.
kalshi-api
Kalshi exchange mechanics — RSA-PSS auth, order schema, YES/NO orderbook convention, WebSocket, and endpoint surface. Market-type-agnostic shared layer for all Kalshi skills.
tushare-plugin-builder
This skill should be used when the user provides a Tushare API document URL and asks to generate a full plugin in this codebase, including extractor, schema, config, query service, and agent/MCP/http usage with testable curl examples.
freee-api-skill
A guide for using freee's APIs through an MCP server. freee is a Japanese business platform covering accounting, payroll, invoices, time tracking, sales, tax filing, and related work.
fastbill
Work with FastBill invoices, customers, payments, reminders, and e-invoice exports through the FastBill XML API.
exchange-connector
Connect to crypto exchanges (Binance, Kraken, Coinbase, etc.). Execute orders, manage API keys, stream market data.