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 hosted Remote MCP for local traffic.
Choose Mercur when you want inspect plus a macOS app or npm CLI tunnel for HTTP/WS/TCP and IDE agents via hosted Remote MCP.
Choose Hooklistener when you want their specific no-CLI UX and stay inside a webhook-URL-only workflow.
How the jobs compare
| Job | Mercur | Hooklistener |
|---|---|---|
| URL without signup | Guest inspector | Core vendor claim |
| Inspect + history | Console request log | Vendor-documented inspect + history |
| Replay | Manual retry | Vendor-documented replay |
| Localhost forward | npx CLI with no account, or macOS app | Optional CLI tunnel (vendor-documented) |
| WS / TCP tunnels | Paid plans | Not positioned as a multi-protocol tunnel |
| IDE / agent inspect (MCP) | Hosted Remote MCP over OAuth (Solo / Team) | Vendor marketing mentions MCP editor integration |
| Inbound email testing | Temporary @mercur-mail.com inbox (Solo / Team) | Positioned around webhook URLs (vendor-documented) |
Last verified: 3 September 2026. Competitor details change — verify on each vendor’s site.
Where Mercur is stronger
- Hosted Remote MCP for Cursor and other IDE agents against local traffic
- WebSocket and TCP through the same agent on paid plans
- In-flight request modifiers and IP allowlists
- Clear Free → Solo → Team packaging for protocols, seats, and mailboxes
- Inbound email in the same workspace as HTTP traffic on paid plans
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 hosted Remote MCP for local traffic as core differentiators. Hooklistener product claims on this page are taken from their public marketing and should be re-verified.
Do I need a CLI for Mercur?
Not for guest inspection in the browser. Forwarding to a local port needs an agent — the npm CLI, which runs a guest tunnel with no account, or the macOS app after you register.
Can teams share Mercur endpoints?
Team plan includes seats and invites. Solo is single-seat.
Related pages
Mercur vs ngrok
Mature localhost tunnel with a CLI, Traffic Inspector, replay, and an auto-assigned free-plan domain.
Read comparison →Mercur vs Hookdeck
Webhook event gateway with ingest, filtering, replay, and CLI MCP — oriented beyond local debug.
Read comparison →Mercur vs webhook.site
Instant payload bin with browser inspect and an email address per token. CLI forward (`whcli`) when you need localhost.
Read comparison →Mercur vs Cloudflare Tunnel
Mature edge tunnel with your Cloudflare account and domain — not a webhook console.
Read comparison →Try Mercur on a real webhook
Get a public HTTPS URL and inspect the payload in the browser, or run npx @mercur_dev/cli http 3000 to forward it to localhost without an account. Register when you want a stable endpoint.