A read-only workflow for retrieving official Toss Securities account and market information through its connected service, including prices, holdings, exchange rates, and order status.

Use it to read stock prices, market details, order books, recent trades, charts, balances, buying power, sellable quantities, commissions, and order states.

It provides a defined way to check current brokerage data while keeping different currencies and sensitive account details handled carefully.

tossinvest — Skill for Codex by cha2hyun/tossinvest-mcp

Install

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.

Any agent

npx skills add cha2hyun/tossinvest-mcp --skill tossinvest

Clone the repo

git clone --depth 1 https://github.com/cha2hyun/tossinvest-mcp

Made for: Codex.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/cha2hyun/tossinvest-mcp/tossinvest/github.svg)](https://agentmods.dev/skills/cha2hyun/tossinvest-mcp/tossinvest)

Your own site

<a href="https://agentmods.dev/skills/cha2hyun/tossinvest-mcp/tossinvest"><img src="https://agentmods.dev/badge/skills/cha2hyun/tossinvest-mcp/tossinvest/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/cha2hyun/tossinvest-mcp/tossinvest"><img src="https://agentmods.dev/badge/skills/cha2hyun/tossinvest-mcp/tossinvest.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 64 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 781 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00064	$0.00781
Opus 5.5	$0.00026	$0.00312
Sonnet 5.5	$0.00013	$0.00156
Haiku 4.5	$0.00006	$0.00078

Measured 19d ago against content hash d6eda7b7b2dd, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

tossinvest 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 19d 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.

skills/tossinvest/SKILL.md · 67 lines

How it starts

The opening of the file, as written. The whole thing — 67 lines — stays where its author put it; the contents beside it link to each section on GitHub.

TossInvest Read Workflows

Use the TossInvest MCP server as the authoritative source for the configured Toss Securities account and supported Korean or US market data. Hermes may prefix tool names with mcp_tossinvest_; names below omit that prefix.

Safety

Treat prices, balances, market sessions, and order states as time-sensitive.
State the response retrieval time when it affects the answer.
Never request or reveal the Toss client secret, OAuth token, MCP token, approval credential, account sequence, or raw account number.
Never infer a trade from analysis, comparison, alerts, or portfolio discussion.
Do not claim that market data is guaranteed, settled, profitable, or investment advice.
Keep KRW and USD separate unless the user asks for conversion; then call get_exchange_rate and state the rate used.

Select tools economically

For a simple current-price request, call get_prices directly.
Call list_stocks to build a market universe; call get_stock_info when symbol identity, market, security type, or currency is ambiguous.
Add get_orderbook, get_recent_trades, or get_candles only when the requested analysis needs them.
Use the stock trend tools for investor, program-trading, short-selling, credit-trade, or securities-lending history, and preserve their upstream freshness limitations.
Use get_rankings for ranked universes and the market-indicator tools for Korean indices, government-bond yields, or KRX investor trading amounts.
Use list_sectors to resolve sector IDs, get_sector for descriptions and returns, get_sector_stocks for constituent stocks including child sectors, and get_sector_etfs for ETFs in that sector only. Use get_sector_rankings for gains or trading-amount rankings.
Call get_stock_warnings before discussing trading restrictions or a possible purchase.
Call get_market_calendar before reasoning about whether a market session is open.
Use get_holdings, get_buying_power, or get_sellable_quantity for account availability.
Use list_orders, then get_order when an exact order state or execution detail is needed. Use the corresponding conditional-order read tools for conditional-order status.
Use get_commissions instead of estimating fees from memory.

Read the full file on GitHub · 67 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

agents/openai.yaml 213 B

Changes

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.

19d ago Changed · +5 lines · +2 tokens per session d6eda7b7b2dd
2mo ago First seen · 62 lines · 62 tokens per session scan A f6b6664782c5

Subscribe to this mod's changes

tossinvest is a skill published in the GitHub repository cha2hyun/tossinvest-mcp (1 stars, last pushed 10d ago), licensed MIT. It adds 64 tokens to every session and 781 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-08-31.

Finance and fintech hermes mcp toss toss-invest

tossinvest next to 6 skills from other repositories
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