io.github.infoinlet-marketplace/mcp-s3
mcp-s3
Read-only S3/MinIO/R2 object storage for AI agents — list buckets/objects, metadata, fetch.
alive probed 2026-10-14
4tools
400tokens in Claude Opus 5.5
444tokens in Claude Code
0.2 %of a 200k context window
211o200k_base estimate
542 msto initialize
6 msto list tools
- Run it
- npx -y @infoinlet/mcp-s3@0.1.1 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- mcp-s3 0.1.0
- Capabilities
- tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-14. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/infoinlet-marketplace/marketplace
- Registry
- active, updated 2026-05-31 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| s3_get_object | 70 | 33 % |
| s3_list_objects | 59 | 28 % |
| s3_head_object | 55 | 26 % |
| s3_list_buckets | 27 | 13 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.infoinlet-marketplace/mcp-s3)
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.