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.
git clone --depth 1 https://github.com/airmcp-com/mcp-standardsWrote 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/commands/airmcp-com/mcp-standards/sandbox)<a href="https://agentmods.dev/commands/airmcp-com/mcp-standards/sandbox"><img src="https://agentmods.dev/badge/commands/airmcp-com/mcp-standards/sandbox.svg" alt="Measured on agentmods" 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 | $0.00015 | $0.00487 |
| Opus 5 | $0.00008 | $0.00244 |
| Sonnet 5 | $0.00003 | $0.00097 |
| Haiku 4.5 | $0.00002 | $0.00049 |
Grade A, and why
flow-nexus-sandbox 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 6d 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.
This is a copy
100% identical to flow-nexus-sandbox — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
What it actually says
Flow Nexus Sandboxes
Deploy and manage isolated execution environments.
Create Sandbox
mcp__flow-nexus__sandbox_create({
template: "node", // node, python, react, nextjs, vanilla, base
name: "my-sandbox",
env_vars: {
API_KEY: "your_api_key",
NODE_ENV: "development"
},
timeout: 3600 // seconds
})
Execute Code
mcp__flow-nexus__sandbox_execute({
sandbox_id: "sandbox_id",
code: `
console.log('Hello from sandbox!');
const result = await fetch('https://api.example.com');
return result.json();
`,
language: "javascript",
capture_output: true
})
Manage Sandboxes
// List all sandboxes
mcp__flow-nexus__sandbox_list({ status: "running" })
// Get status
mcp__flow-nexus__sandbox_status({ sandbox_id: "id" })
// Upload file
mcp__flow-nexus__sandbox_upload({
sandbox_id: "id",
file_path: "/app/data.json",
content: JSON.stringify(data)
})
// Stop sandbox
mcp__flow-nexus__sandbox_stop({ sandbox_id: "id" })
// Delete sandbox
mcp__flow-nexus__sandbox_delete({ sandbox_id: "id" })
Templates
- node: Node.js environment
- python: Python 3.x environment
- react: React development setup
- nextjs: Next.js full-stack
- vanilla: Basic HTML/CSS/JS
- base: Minimal Linux environment
Common Patterns
// API development sandbox
mcp__flow-nexus__sandbox_create({
template: "node",
name: "api-dev",
install_packages: ["express", "cors", "dotenv"],
startup_script: "npm run dev"
})
// ML sandbox
mcp__flow-nexus__sandbox_create({
template: "python",
name: "ml-training",
install_packages: ["numpy", "pandas", "scikit-learn"]
})
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.
- 6d ago First seen · 83 lines · 15 tokens per session scan A 6940ff3b42fa
flow-nexus-sandbox is a command published in the GitHub repository airmcp-com/mcp-standards (3 stars, last pushed 9mo ago), licensed MIT. It adds 15 tokens to every session and 487 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to flow-nexus-sandbox, differing in 0 lines, and is treated as a copy.
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