Mock server
Return canned responses from a public URL without standing up a separate mock product. Room later for match rules, latency, and OpenAPI-driven mocks. Targets can shift.
Roadmap
What’s shipping next.
A public view of what we’re building next and what developers can already use — the WSS session inspector, tunnels, MCP, webhook tooling, temporary mailboxes, and the blog.
Priorities may change. Quarters are targets, not commitments.
PlannedPlanned · Q4 2026
Coming next
Work queued for the near term. Targets can shift as we learn from usage.
ShippedShipped · Q3 2026 Shipped · Q3 2026 Shipped · Q3 2026 Shipped · Q2 2026 Shipped · Q2 2026 Shipped · Q2 2026 Shipped · Q2 2026 Shipped · Q2 2026
Already available
Developer-facing surfaces you can use today.
WSS session inspector
Inspect live WebSocket session traffic in the product — frames, timing, and connection state alongside your HTTP request history.
Temporary mailboxes
Receive-only @mercur-mail.com inboxes on Solo and Team: inspect inbound mail in the console and optionally forward parsed messages as JSON to an HTTP endpoint.
CLI client
npm package @mercur_dev/cli authenticates with a CLI token and forwards an existing HTTP, WebSocket, or TCP endpoint from the terminal, CI, or any OS with Node.js 20+.
TCP tunnel
Expose TCP services through Mercur with public host:port targets and connection metrics in the console.
WebSocket tunnel
Forward WebSocket connections over a public HTTPS URL so local WS services stay reachable during development.
Remote MCP
Let an IDE agent list endpoints, search HTTP request history, and open full payloads via Mercur’s remote MCP server.
Webhook Inspector
Try a public webhook URL without an account. Incoming requests appear in the browser; register to unlock Endpoints.
Docs & Blog
Quickstarts, security notes, troubleshooting, and step-by-step posts for webhook debugging and MCP setup.
FAQ
Roadmap questions
How often is this roadmap updated?
We update it when priorities or ship status change. It is a living page, not a fixed annual plan.
Are the quarters commitments?
No. Quarters are planning targets. Features can move earlier or later as we learn from usage and feedback.
Where can I try what’s already shipped?
Use Docs and the Blog for setup, install the npm CLI or the macOS app to forward traffic, open the webhook inspector without an account, or create an account for Endpoints, the WSS session inspector, TCP/WS tunnels, remote MCP, and temporary mailboxes on Solo or Team. Mock server is the next public item on this page.
Try what’s already shipped
Create an account for Endpoints and MCP, or open the docs for quickstarts and guides.