# Diffci MCP server

Source: https://glimind.com/server/mcp-registry%2Fio.github.diffci%2Fdiffci
Registry id: `mcp-registry/io.github.diffci/diffci`
Status: live (checked 2026-10-27T03:13:55.135Z)

## Verdict

Diffci MCP server answered 100% of Glimind's liveness checks over 30 days, better than 42% of MCP servers, with 508 ms median handshake and 0 outages in 90 days. Its agent-readiness grade is A (96/100) across 3 tools, costing an agent about 437 tokens to load. Checked every few minutes; no tool is ever called.

## Measurements (30 days)

| Metric | Value | Better than |
|---|---|---|
| Uptime, 30 days | 100% | 42% of MCP servers |
| Median handshake latency | 508 ms | 49% of MCP servers |
| p95 handshake latency | 2573 ms | — |
| Checks in 30 days | 4,946 | — |
| Outages, 90 days | 0 | — |
| Median recovery | — | — |
| Agent-readiness score | 96/100 (A) | 82% of MCP servers |
| Tools | 3 | — |
| Tool-list size for an agent | ~437 tokens | 91% of MCP servers |
| Days observed | 29 | — |

## Install

```json
{
  "mcpServers": {
    "diffci-mcp-server": {
      "type": "http",
      "url": "https://diffci.com/mcp/v1"
    }
  }
}
```

Claude Code:

```sh
claude mcp add --transport http diffci-mcp-server https://diffci.com/mcp/v1
```

## Tools (8)

- `check`: Runs inferred full and selected test commands, reports gross test-time and net runtime changes when both pass, and writes observation and savings reports outsid
- `diffci_interpret_report`: Validate and summarize a DiffCI observation report, including selective or full mode, affected-test counts, fallbacks, non-interference evidence, and the conser
- `diffci_validation_plan`: Plan change-aware CI validation, affected-test selection, test impact analysis, or GitHub Actions workflow checks. Returns a safe local DiffCI command without a
- `diffci_verify_workflow_text`: Perform a stateless preliminary safety check of GitHub Actions YAML: dedicated observer job, continue-on-error, dependency isolation, read-only permissions, and
- `init`: Seeds the repository with default DiffCI instructions for AI coding agents.
- `observe`: Analyzes a commit's changes and dependency graph, reports which test files it would select, why it falls back to a full run, and whether it can propose a test c
- `verify-savings`: Compares the normal full command with DiffCI's proposed selected command against an observation report and writes JSON plus Markdown evidence.
- `verify-workflow`: Checks a local GitHub Actions workflow configuration for DiffCI.

Measured by Glimind (https://glimind.com): MCP handshake + tool list only, no tool is ever called. CC BY 4.0.