Two inspect-first webhook URL products
Hooklistener markets no-signup, no-CLI webhook URLs with inspection and replay. Mercur overlaps on guest inspect, then differentiates with multi-protocol Endpoints and Remote MCP.
Choose Mercur when you want inspect plus a macOS agent tunnel for HTTP/WS/TCP and IDE agents via MCP.
Choose Hooklistener when you want their specific no-CLI UX and stay inside a webhook-URL-only workflow.
Who wins which job
| Job | Mercur | Hooklistener |
|---|---|---|
| URL without signup | Guest tester | Core claim |
| Inspect + history | Yes | Yes |
| Replay | Manual retry | Replay tooling |
| Localhost forward | macOS agent | Optional CLI tunnel |
| WS / TCP tunnels | Paid plans | Not the focus |
| Remote MCP | Yes — Solo / Team | No |
Summaries as of August 2026. Verify current limits on each vendor’s pricing page.
Where Mercur is stronger
- Remote MCP for Cursor and other IDE agents
- WebSocket and raw TCP through the same agent
- In-flight request modifiers and IP allowlists
- Clear Free → Solo → Team packaging for protocols and seats
When Hooklistener wins
- Marketing focus on zero-CLI webhook URLs
- Product shape optimized purely for webhook bins + tunnels
- Their UI patterns for live payload exploration
Common questions
How is Mercur different from Hooklistener?
Both target inspect-first webhook URLs. Mercur additionally positions multi-protocol localhost tunneling and Remote MCP as core differentiators.
Do I need a CLI for Mercur?
Not for guest inspection. Localhost forward uses the macOS desktop agent rather than a required CLI install.
Can teams share Mercur endpoints?
Team plan includes seats and invites. Solo is single-seat.
Related pages
Mercur vs ngrok
The default localhost tunnel. Strong CLI; free URLs rotate; inspect is secondary.
Read comparison →Mercur vs Hookdeck
Webhook event gateway with strong ingest, filtering, and replay — oriented beyond local debug.
Read comparison →Mercur vs webhook.site
Fastest way to catch a raw payload. Limited localhost forward on free/common workflows.
Read comparison →Mercur vs Cloudflare Tunnel
Mature edge tunnel with your Cloudflare account/domain — weak webhook inspect UX.
Read comparison →Try Mercur on a real webhook
Get a public HTTPS URL, inspect the payload, then upgrade to a Endpoint when you are ready to hit localhost.