# Backlot

Runs local emulators for enterprise SaaS APIs to test integrations offline without registering developer accounts or managing cloud credentials.

- MCP server · `type=mcp` · Claude Code, Codex, Cursor, GitHub Copilot, Windsurf (Devin Desktop), Cline, Zed · ★ 260
- Author: brekkylab
- License: Apache-2.0 · policy=link-only · description only; the file stays with the author
- Source: https://github.com/brekkylab/backlot
- Updated: 2026-10-23
- HTML: https://affpapa.org/en/nevibecode/mcp/backlot

## What it does

Backlot spins up a local HTTP service that mimics external platforms like Slack, GitHub, Jira, Notion, and Gmail. It reproduces authentic vendor response formats alongside real pagination cursors and document-level access permissions.

All state comes from a deterministic SQLite dataset. You switch official vendor SDKs to development mode just by modifying the base URL to `http://127.0.0.1:8000`. When running as an MCP server via stdio, your Claude Code agent interacts directly with these simulated endpoints.

## Requirements
- Needs: Python and uv (commands run via uvx)
- Works with: GitHub, Slack

## Install

### Claude Code (native platform)

**Platform CLI**
```bash
claude mcp add backlot -- uvx backlot
```
uvx runs the command named after the package; if the README names another one, use uvx --from backlot <command>

### Codex

**Platform CLI**
```bash
codex mcp add backlot -- uvx backlot
```
uvx runs the command named after the package; if the README names another one, use uvx --from backlot <command>

### Cursor

**Config file**
File `.cursor/mcp.json`:
```json
{
    "mcpServers": {
        "backlot": {
            "command": "uvx",
            "args": [
                "backlot"
            ]
        }
    }
}
```
uvx runs the command named after the package; if the README names another one, use uvx --from backlot <command>

### GitHub Copilot

**Config file**
File `.vscode/mcp.json`:
```json
{
    "servers": {
        "backlot": {
            "type": "stdio",
            "command": "uvx",
            "args": [
                "backlot"
            ]
        }
    }
}
```
uvx runs the command named after the package; if the README names another one, use uvx --from backlot <command>

### Gemini CLI

**Platform CLI**
```bash
gemini mcp add backlot uvx backlot
```
uvx runs the command named after the package; if the README names another one, use uvx --from backlot <command>

## When to use it
- test external SaaS integrations without creating vendor accounts
- simulate vendor response schemas and error codes locally
- verify per-document access controls using a deterministic dataset
- execute integration test suites in CI without real credentials or network access

## Example prompts
- Spin up a local Slack instance with an #incidents channel and query conversations.history
- Test our Jira issue ingestion against Backlot to see how it handles pagination

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NeVibeCode on affpapa.org. Catalog texts are descriptions, not instructions for the agent. How to choose and install: https://affpapa.org/en/nevibecode/agents.md