Public Streamable HTTP MCP

Give coding agents a safe CI-validation tool.

DiffCI's public MCP server plans change-aware validation, interprets observation reports, and checks GitHub Actions isolation without credentials or repository access.

https://diffci.com/mcp

Connect your client View source and docs

Connect in one command

Codex

Codex CLI and app

codex mcp add diffci --url https://diffci.com/mcp
codex mcp list

This uses Codex's supported remote HTTP configuration. Official Codex MCP docs →

Claude Code

Add an HTTP server

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

Cursor

MCP JSON

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

VS Code

MCP JSON

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

Three read-only tools

diffci_validation_plan returns a safe local command for change-aware checks, observation, initialization, or workflow verification.
diffci_interpret_report validates and summarizes a diffci.observation.v1 report, including affected-test counts, fallbacks, and the conservative next action.
diffci_verify_workflow_text checks one GitHub Actions YAML document for a dedicated, non-blocking, read-only observer job and immutable references.

The server also exposes the diffci_validate_change prompt and agent-policy/setup resources.

Know the trust boundary

The HTTPS endpoint is stateless. It requires no account, stores no session, receives no repository content unless you explicitly pass a report or workflow to a tool, and never executes a command.

For tools that inspect a checkout or run tests, use the local stdio server from the repository directory:

npx -p "@diffci.com/diffci@latest" diffci-mcp

The local server exposes diffci_check, diffci_init, and diffci_verify_workflow. Required project CI remains authoritative.

Machine-readable discovery

The Server Card and AI Catalog formats are emerging discovery conventions; the official MCP Registry entry remains the canonical directory listing.