MCP server

DiffCI Official

io.github.DiffCI/diffci

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

Fail-closed, change-aware verification for AI coding agents with affected-test guidance.

Website Source

At a glance

Type

MCP server

Publisher

diffci.com (verified by the MCP Registry)

Status

Working at last check

Tools

3

Token cost

About 450 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

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

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.diffci]
url = "https://diffci.com/mcp/v1"

Gemini CLI

{"mcpServers":{"diffci":{"httpUrl":"https://diffci.com/mcp/v1"}}}

Cursor

{"mcpServers":{"diffci":{"url":"https://diffci.com/mcp/v1"}}}

VS Code

{"servers":{"diffci":{"type":"http","url":"https://diffci.com/mcp/v1"}}}

Antigravity

agy mcp add diffci https://diffci.com/mcp/v1

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"diffci","server_url":"https://diffci.com/mcp/v1","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"diffci","server_url":"https://diffci.com/mcp/v1"}

Tools

• diffci_interpret_report ~117 tokens
  Validate and summarize a DiffCI observation report, including selective or full mode, affected-test counts, fallbacks, non-interference evidence, and the conservative next action.
• diffci_validation_plan ~203 tokens
  Plan change-aware CI validation, affected-test selection, test impact analysis, or GitHub Actions workflow checks. Returns a safe local DiffCI command without accessing the checkout or executing it.
• diffci_verify_workflow_text ~130 tokens
  Perform a stateless preliminary safety check of GitHub Actions YAML: dedicated observer job, continue-on-error, dependency isolation, read-only permissions, and immutable DiffCI references.

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