Nerf Watch

Nerf Watch MCP server

A hosted, read-only MCP server for the public scores and history behind Nerf Watch.

A lower score is a lower score on this suite, not proof that a provider changed a model. Runs are noisy, and a provider's defaults, the endpoint or the runner itself can change. Data: tokenusage.dev linked to https://tokenusage.dev/nerfwatch.

• Endpoint: https://tokenusage.dev/mcp/nerfwatch (Streamable HTTP)
• No API key, account or sign-in
• Read-only public score data
• Both tools share one 300-second read cache per server instance

This directory contains client documentation and Registry metadata. The hosted implementation source is not in this repository.

Tools

Tool	Arguments	Result
get_nerfwatch_scores	none	Latest public scores, previous runs, changes, baselines and trends; model ids are included.
get_nerfwatch_history	required model id from get_nerfwatch_scores	That model's retained history, oldest first, with each point's suite version.

Missing days are missing, not zero. Scores and changes are rounded to two decimals. Comparisons are within one suite version. Retention and baseline settings come from the responses. Evidence answers, grader check lines and test questions are not returned.

Install

Claude Code:

claude mcp add --transport http nerfwatch https://tokenusage.dev/mcp/nerfwatch

Codex:

codex mcp add nerfwatch --url https://tokenusage.dev/mcp/nerfwatch

For Claude Code project scope, add this to .mcp.json. Other clients that accept this HTTP mcpServers format can use the same entry:

{
  "mcpServers": {
    "nerfwatch": {
      "type": "http",
      "url": "https://tokenusage.dev/mcp/nerfwatch"
    }
  }
}

Discovery

• Registry name: dev.tokenusage/nerfwatch
• Manifest: server.json
• Server card: https://tokenusage.dev/mcp/nerfwatch/server-card
• AI catalog: https://tokenusage.dev/.well-known/ai-catalog.json
• Fields, caching and access: https://tokenusage.dev/developers

The separate Codex reset server remains at https://tokenusage.dev/mcp.

Credit and terms

When showing this data to other people, show Data: tokenusage.dev linked to https://tokenusage.dev/nerfwatch on the same screen or in the same message. Personal use needs no visible credit. Relays retain the source URL and pass on this credit condition.

Please poll no faster than every five minutes and retain the score qualification above.

Terms: https://tokenusage.dev/terms
Privacy: https://tokenusage.dev/privacy
Questions and corrections: https://tokenusage.dev/contact

Unofficial; not affiliated with OpenAI or Anthropic.