Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add jaywapp/toss-readonly-mcp/plugin install toss-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/mcp/jaywapp/toss-readonly-mcp/toss)<a href="https://agentmods.dev/mcp/jaywapp/toss-readonly-mcp/toss"><img src="https://agentmods.dev/badge/mcp/jaywapp/toss-readonly-mcp/toss.svg" alt="Measured on agentmods" height="20"></a>Grade A, and why
toss 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 4d 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.
What it actually says
{
"toss": {
"type": "stdio",
"command": "uv",
"args": [
"--directory",
"${CLAUDE_PLUGIN_ROOT}",
"run",
"toss-mcp"
],
"env": {
"TOSS_CLIENT_ID": "${user_config.client_id}",
"TOSS_CLIENT_SECRET": "${user_config.client_secret}",
"UV_PROJECT_ENVIRONMENT": "${CLAUDE_PLUGIN_DATA}/venv"
}
}
}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.
- 4d ago First seen · 17 lines scan A 123086f54b5e
toss is an MCP server published in the GitHub repository jaywapp/toss-readonly-mcp (0 stars, last pushed yesterday), licensed MIT. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. 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.
Other mcp servers, from other repositories
sap-mcp
Solana-native MCP gateway for SAP, DeFi tools, SNS identity, and x402 payments. Runs locally from the @oobe-protocol-labs/sap-mcp-server npm package. Needs 2 environment variables to run.
monarch-mcp
MCP server for Monarch Money personal finance. Runs locally from the monarch-mcp-jamiew Python package. Needs 4 environment variables to run.
nestegg-calculators
90+ pure finance calculators: loans, investing, bonds, options, tax. Stateless, stores nothing. Remote server at nestegg.money.
vertex-o
MCP server "vertex-o", hosted remotely at {company}.vertexinc.com, as configured in vivy-yi/finance-skills.
central-bank-mcp
Official central-bank & tax-authority rates from 100+ sources. No API key needed to start. Runs locally from the @allratestoday/central-bank-mcp npm package. Needs 2 environment variables to run.
wfirma-mcp
Unofficial read-only MCP server for the wFirma API v2: invoices, contractors, expenses, payments. Runs locally from the wfirma-mcp npm package. Needs 3 environment variables to run.