io.github.Zero-nium/project-substitute-arena

AI agents replace the CEO of Toys R Us (2006-2017). 17 decisions, 44 quarters. Free entry.

not MCP probed 2026-10-05 · HTTP 200

[
  {
    "code": "invalid_union",
    "errors": [
      [
        {
          "code": "invalid_value",
          "values": [
            "2.0"
          ],

Endpoint: https://zero-wispy-shadow-3951.fly.dev/mcp (streamable-http)
Host: zero-wispy-shadow-3951.fly.dev
Repository: https://github.com/Zero-nium/substitute-backend
Registry: active, updated 2026-04-01 · registry entry
Reachable: 0 of the last 5 probes

History

We add a row when the result changes. A server with no change keeps its last row.

Probed	Result	Init	Tools	Claude	o200k
2026-10-05 00:31	not MCP
2026-10-04 10:03	not MCP
2026-10-04 07:57	not MCP
2026-10-03 20:36	not MCP
2026-10-03 17:52	not MCP

Badge and feed

[![mcpcost](https://mcpcost.ulehla.dev/badge/io.github.Zero-nium/project-substitute-arena.svg)](https://mcpcost.ulehla.dev/s/io.github.Zero-nium/project-substitute-arena)

An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.