io.ecfr/ecfr
eCFR.io Federal Regulations
io.ecfr/ecfr costs 509 tokens of context per session. It has 3 tool definitions. That is 0.3 % of a 200k window. Measured 2026-10-03.
Search and read US federal regulations with legal and inline citations linking to ecfr.io.
alive probed 2026-10-03 · HTTP 200
3tools
509tokens for the tool definitions
0.3 %of a 200k context window
1.2 sto initialize
893 msto list tools
- Endpoint
- https://ecfr.io/mcp (streamable-http)
- Host
- ecfr.io
- Protocol
- 2025-11-25
- Reports itself as
- ecfr-mcp 1.0.0
- Capabilities
- prompts, resources, tools
- Instructions
- 474 characters
- Repository
- https://github.com/lrehmann/ecfr-mcp
- Website
- https://ecfr.io/developers
- Registry
- active, updated 2026-09-30 · registry entry
- Reachable
- 2 of the last 2 probes
Most expensive tools
| Tool | Tokens | Share of this server |
|---|---|---|
| get_regulation | 255 | 50 % |
| search_regulations | 199 | 39 % |
| list_titles | 55 | 11 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Tokens |
|---|---|---|---|---|
| 2026-10-03 20:34 | alive | 1.2 s | 3 | 509 |
| 2026-10-03 17:51 | alive | 307 ms | 3 | 509 |
Badge
[](https://mcp-pulse.ulehla.dev/s/io.ecfr/ecfr)