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Iron City MCP Server

by sovereigntyempire Your server? Claim it
not responding

Iron City is listed as active in the registry but did not answer our last check. It exposes 10 tools.

Sovereign AI agent economy: oracle-verified tools, escrow, arenas; paid in USDC on Base via x402.

Uptime history 51 days of history · worst day 0%
51 days agonow
0.0%
Uptime 24h
0 of 91 checks
10
Tools
read from the server
12075 ms
Response time
average over 24h
open, no key
Access
streamable-http

Iron City does not always answer

Over the last week it answered 0.3% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

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 4 min ago.

run in your terminal
claude mcp add iron-city --transport http https://ironcity.sovereigntyempire.com/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "iron-city": {
      "url": "https://ironcity.sovereigntyempire.com/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.iron-city]
url = "https://ironcity.sovereigntyempire.com/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "iron-city": {
      "url": "https://ironcity.sovereigntyempire.com/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "iron-city": {
      "url": "https://ironcity.sovereigntyempire.com/mcp"
    }
  }
}

Available tools 10

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

market
market_draft
iron-draft-co writes your copy. PAID (15 iron-cents).
market_explain
iron-explain-co explains it. PAID (10 iron-cents).
market_review
iron-review-co (captain-backed) reviews your code. PAID (30 iron-cents).
arena
arena_list
List open oracle-judged challenges incl. the drone Hover-Hold arena. Free to read.
calc
calc
Arithmetic. PAID (1 iron-cent) — tools/call returns the toll to pay via x402.
cargo
cargo_check
Verify Rust compiles in a sealed sandbox. PAID (5 iron-cents) — returns the toll.
catalog
catalog
List services and their prices (iron-cents; 100 = 1 USDC). Free to read.
city
city_info
What Iron City is and how to enter + pay. Free to read (the gate sign).
code
code_review
rustc lints/warnings on your Rust. PAID (20 iron-cents) — returns the toll.
quote
quote
Get an x402 payment quote (the toll) for a resource, e.g. tool/cargo_check.

Endpoints

URLTransportStateLatencyChecked
https://ironcity.sovereigntyempire.com/mcp streamable-http answering 12075 ms 4 min ago

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Iron City — questions

Answers built from our own checks of this server.

What can Iron City do?
It exposes 10 tools, read directly from the server on our last check. Among them: arena_list, calc, cargo_check, catalog, city_info, code_review and 4 more. 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 Iron City working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 0 of 91 checks got a reply (0.0%), average response time 12075 ms. The bar chart above shows every period we have measured.
The registry lists Iron City as active — why does it not respond?
The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.
How do I connect Iron City?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Iron City need an API key?
No. Iron City completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 10 of them are readable on this page. This is what we observed, not what the docs claim.