io.github.rog0x/schema
mcp-schema-tools
Is the io.github.rog0x/schema MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-30.
JSON Schema, TypeScript types, mocks for AI agents
alive probed 2026-11-14 · unchanged since 2026-10-30
5tools
1.1ktokens in Claude Opus 5.5
0.5 %of Claude's 200k window
0.4×the median server
211 msto initialize
6 msto list tools
- Run it
- npx -y @rog0x/mcp-schema-tools@1.0.1 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- mcp-schema-tools 1.0.0
- Capabilities
- tools
- Instructions
- none
- Of a 1M window
- 0.1 % of a 1M context window
- Count
- 1.1k tokens in Claude Opus 5.5, exact, measured 2026-10-16. With the Claude Code prefix mcp__…__ on each tool name: 1.1k. The o200k_base estimate is 603. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/rog0x/mcp-schema-tools
- Registry
- active, updated 2026-03-22 · registry entry
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.80×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| mock_from_schema | 258 | 143 | 24 % |
| generate_json_schema | 254 | 141 | 23 % |
| generate_typescript | 222 | 123 | 20 % |
| diff_schemas | 193 | 107 | 18 % |
| validate_schema | 160 | 89 | 15 % |
Compare this server with others.
More servers
Other registry entries on npmjs.com, the ones next to this name; all of them.
- io.github.rog0x/network · alive
- io.github.rog0x/npm · alive
- io.github.rog0x/perf · alive
- io.github.rog0x/regex · alive
- io.github.rog0x/seo · alive
- io.github.rog0x/string · alive
- io.github.rog0x/task · alive
- io.github.rog0x/testing · alive
Servers that mention schema.
- AnomalyArmor ai.anomalyarmor/armor-mcp · needs auth
- Entity Enricher ai.entityenricher/enricher · alive
- ai.getvda/claude-schema-output-agent · newer protocol
- ai.getvda/multi-provider-schema-output-agent · newer protocol
- Schema ai.schemalabs/schema · needs auth
- ai.waystation/postgres · paid (402)
- ai.waystation/supabase · paid (402)
- ai.smithery/afgong-sqlite-mcp-server · not found
Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- The server answers initialize and tools/list. Nothing to fix.