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Sandbox-truth probe for agent frameworks MCP Server

answering

Sandbox-truth probe for agent frameworks is answering right now. Last checked 5 min ago. It exposes 5 tools.

Measured sandbox verdicts: 7-axis probe, signed pinned receipt. Cached $0.25, fresh $2.50.

Uptime history 70 hours of history
70 hours agonow
100.0%
Uptime 24h
92 of 92 checks
5
Tools
read from the server
320 ms
Response time
average over 24h
open, no key
Access
streamable-http

Nothing serious here today

Today is the operative word: we check Sandbox-truth probe for agent frameworks every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 5 min ago.

run in your terminal
claude mcp add sandbox-truth-probe --transport http https://textforagents.com/products/sandbox-truth-probe/mcp
Settings → Connectors → Add custom connector, then paste this address
https://textforagents.com/products/sandbox-truth-probe/mcp
~/.codex/config.toml
[mcp_servers.sandbox-truth-probe]
url = "https://textforagents.com/products/sandbox-truth-probe/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "sandbox-truth-probe": {
      "url": "https://textforagents.com/products/sandbox-truth-probe/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "sandbox-truth-probe": {
      "type": "http",
      "url": "https://textforagents.com/products/sandbox-truth-probe/mcp"
    }
  }
}

Available tools 5

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

sandbox
sandbox_cached_verdict
Look up whether a cached verdict exists (delivery is paid over x402 on the HTTP surface).
sandbox_frameworks
List probeable fixtures and the real-population status.
sandbox_gate
Dispatch-gate evaluation: pin, DEAD-FLAG and stale-hash refusal.
sandbox_verify_receipt
Verify a receipt against the pinned signer key.
sandbox_watch_status
Your watch subscriptions and current cached verdicts.

Endpoints

URLTransportStateLatencyChecked
https://textforagents.com/products/sandbox-truth-probe/mcp streamable-http answering 317 ms 5 min ago

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Sandbox-truth probe for agent frameworks — questions

Answers built from our own checks of this server.

What can Sandbox-truth probe for agent frameworks do?
It exposes 5 tools, read directly from the server on our last check. Among them: sandbox_cached_verdict, sandbox_frameworks, sandbox_gate, sandbox_verify_receipt, sandbox_watch_status. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is Sandbox-truth probe for agent frameworks working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 320 ms. The bar chart above shows every period we have measured.
How do I connect Sandbox-truth probe for agent frameworks?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Sandbox-truth probe for agent frameworks need an API key?
No. Sandbox-truth probe for agent frameworks completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 5 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Sandbox-truth probe for agent frameworks?
It answers our handshake in 320 ms on average, which is faster than 51% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.