dev.ceraph/react-native-mcp
Ceraph
MCP server for agent-driven React Native and Expo development and mobile testing
alive probed 2026-10-19
50tools
≈ 19ktokens, estimate
≈ 9.7 %of Claude's 200k window
14×the median server
1.4 sto initialize
16 msto list tools
- Run it
- npx -y @ceraph/react-native-mcp@1.1.2 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- react-native-mcp 1.1.2
- Capabilities
- logging, tools
- Instructions
- 10 965 characters
- Of a 1M window
- ≈ 1.9 % of a 1M context window, estimate
- Claude count
- The count_tokens endpoint refused the tool schemas: invalid x-api-key. The estimate stands in.
- Website
- https://ceraph.dev
- Registry
- active, updated 2026-10-13 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
Estimates with the o200k_base tokenizer.
| Tool | o200k estimate | Share of this server |
|---|---|---|
| ceraph_record_run | 3 070 | 16 % |
| ceraph_start | 1 549 | 8 % |
| screen_tap_and_verify | 1 063 | 5 % |
| screen_type_into_field | 736 | 4 % |
| ceraph_init | 699 | 4 % |
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
- This server is in the heaviest 10 % of the registry. Its 5 most expensive tools are 37 % of the cost. Shorter descriptions, fewer optional parameters and fewer tools cut the cost. The command npx mcpcost --url <endpoint> --tools 50 lists every tool with its cost.
- The Anthropic count_tokens endpoint refused the tool schemas (invalid x-api-key). A client that validates schemas can refuse them too.