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 cha2hyun/tossinvest-mcp --skill tossinvestgit clone --depth 1 https://github.com/cha2hyun/tossinvest-mcpWrote 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/cha2hyun/tossinvest-mcp/tossinvest)<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.
<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>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 | $0.00062 | $0.00673 |
| Opus 5 | $0.00031 | $0.00336 |
| Sonnet 5 | $0.00012 | $0.00135 |
| Haiku 4.5 | $0.00006 | $0.00067 |
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 12d 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 — 62 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_rateand state the rate used.
Select tools economically
- For a simple current-price request, call
get_pricesdirectly. - Call
list_stocksto build a market universe; callget_stock_infowhen symbol identity, market, security type, or currency is ambiguous. - Add
get_orderbook,get_recent_trades, orget_candlesonly 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_rankingsfor ranked universes and the market-indicator tools for Korean indices, government-bond yields, or KRX investor trading amounts. - Call
get_stock_warningsbefore discussing trading restrictions or a possible purchase. - Call
get_market_calendarbefore reasoning about whether a market session is open. - Use
get_holdings,get_buying_power, orget_sellable_quantityfor account availability. - Use
list_orders, thenget_orderwhen an exact order state or execution detail is needed. Use the corresponding conditional-order read tools for conditional-order status. - Use
get_commissionsinstead of estimating fees from memory.
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.
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.
- 12d ago First seen · 62 lines · 62 tokens per session scan A f6b6664782c5
tossinvest is a skill published in the GitHub repository cha2hyun/tossinvest-mcp (1 stars, last pushed 3d ago), licensed MIT. It adds 62 tokens to every session and 673 once invoked, about $0.0003 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 2026-08-31.
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