MCP Replay vs Röle

MCP Replay is a trace viewer for the Model Context Protocol, the open standard AI agents use to call tools. Record a session with the free mcp-tape command line tool, then open it on your phone: every request, response, error, and latency, organized and searchable. WHAT YOU CAN DO - Open .jsonl traces from Files, AirDrop, or any share sheet - Follow a replay link someone sent you, or paste a bare share ID - Watch a live session streaming from mcp-tape on your own network - See paired tool calls with latencies, and per-tool stats (count, errors, avg, p95) - Filter the timeline by tool or method - Share a trace as a link that expires after 30 days, with a delete token so you stay in control BUILT FOR PRIVACY Traces stay on your phone. Nothing is uploaded unless you explicitly share a trace, and there are no accounts, no analytics, and no tracking. Live mode connects directly to your own computer; the stream never touches a server. FOR ANYONE BUILDING WITH AGENTS If you use Claude, ChatGPT, or any MCP-compatible agent framework and have ever asked "what did it actually do?", this is the answer. Record with one command: npx mcp-tape -- your-mcp-server-command Then open the trace here or at mcpreplay.dev. MCP Replay is open source and independent. It works with any tool that emits the open mcp-tape trace format.

Röle — API testing that stays on your device Röle is a lightweight, local-only API client for testing REST endpoints. There's no account to create, no sign-in screen, and no backend server in between — Röle talks directly to the APIs you point it at, and everything you build stays in plain files on your device. Send any request Full support for GET, POST, PUT, DELETE, PATCH, HEAD, and OPTIONS. Edit headers, query params, and body with a dedicated editor, then inspect the response — status, timing, size, and a formatted body — the moment it comes back. Stay organized Group related requests into collections. Set up environments for dev, staging, and production, and swap between them with variables like {{baseUrl}} instead of editing URLs by hand. Automate your testing Collection Runner — fire off every request in a collection in sequence and get a pass/fail summary Flows — chain requests together, pass one response into the next, and add delays between steps Tests — add assertions (like status code checks) that run automatically against every response History — every request you send is saved locally, so nothing gets lost Bring your existing work Import a Postman or Röle workspace as JSON, with conflict handling if names collide. Export your workspace anytime to back it up or move it to another device. Built to stay out of your way A clean Material 3 interface with light, dark, and system theme support. Runs the same on phone or desktop. Why local-only? Because your API keys, staging URLs, and test data are yours. Röle doesn't sync to a server, doesn't require login, and doesn't send your requests anywhere except the endpoint you're testing. Röle means "relay" in Turkish — the app relays requests and responses between you and your services, nothing more.