io.github.YakupEmreYerli/mcp-firefly-iii
Firefly MCP Server
Security-first, self-hosted MCP server for Firefly III — 152 operations behind 5 scoped tools.
alive probed 2026-10-15
5tools
3.6ktokens in Claude Opus 5.5
3.7ktokens in Claude Code
1.8 %of a 200k context window
2.2ko200k_base estimate
501 msto initialize
12 msto list tools
- Run it
- npx -y @yakupemreyerli/firefly-mcp@1.1.2 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- Firefly MCP Server 1.1.2
- Capabilities
- tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-15. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/YakupEmreYerli/mcp-firefly-iii
- Registry
- active, updated 2026-08-30 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| firefly_query | 870 | 40 % |
| firefly_mutate | 510 | 23 % |
| firefly_destructive | 489 | 22 % |
| firefly_get_schema | 169 | 8 % |
| firefly_list_operations | 144 | 7 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.YakupEmreYerli/mcp-firefly-iii)
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.