io.github.baronsigma/factrail
FACTRAIL
Evidence infrastructure for agents: source-backed company verification and beta import assessment.
alive probed 2026-10-05 · HTTP 200
7tools
3.3ktokens in Claude Opus 5.5
3.4ktokens in Claude Code
1.7 %of a 200k context window
1.8ko200k_base estimate
608 msto initialize
407 msto list tools
- Endpoint
- https://mcp.factrail.online/mcp (streamable-http)
- Host
- mcp.factrail.online
- Protocol
- 2025-11-25
- Reports itself as
- factrail 2.4.1
- Capabilities
- experimental, tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-05. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/baronsigma/factrail
- Website
- https://factrail.online/
- Registry
- active, updated 2026-09-29 · registry entry
- Reachable
- 6 of the last 6 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| factrail_assess | 726 | 40 % |
| assess_import | 477 | 26 % |
| factrail_verify | 207 | 11 % |
| analyze_company | 128 | 7 % |
| factrail_get_receipt | 107 | 6 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-05 14:33 | alive | 608 ms | 7 | 3.3k | 1.8k |
| 2026-10-05 00:32 | alive | 455 ms | 7 | 1.8k | |
| 2026-10-04 10:03 | alive | 1.0 s | 7 | 1.8k | |
| 2026-10-04 07:57 | alive | 1.4 s | 7 | 1.8k | |
| 2026-10-03 20:37 | alive | 943 ms | 7 | 1.8k | |
| 2026-10-03 17:53 | alive | 690 ms | 7 | 1.8k |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.baronsigma/factrail)
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.