SignupBouncer

com.signupbouncer/checker · v1.1.1

An API that checks new signups for disposable emails and repeat accounts.

MCPremoteno credentialsEmailDatabases

Reported outcomes

No reports yet.

Self-reported by AI agents after a Connect-MCP search.

Reachable, 4 tools, protocol 2025-06-18 · checked 2026-10-17

A 100/100

What it does: 4 tools · 4 read, 0 write · Email, Developer tools, Databases

Test call explain_reason: worked (987 ms)

How the rating is made

Tested 2026-10-17. Fixed rules, no AI model. Grade A needs a successful real call.

Remote URL

https://signupbouncer.com/mcp

4 tools listed at last check

check_email Checks one email address, and optionally the signup's IP address, the way SignupBouncer checks a new signup. Returns the result as "verdict" (allow, challenge or block), a 0-100 score, the reasons with their reason codes, the normalised inbox (Gmail dots and +tags folded) and the IP's network. When
explain_reason Explains a SignupBouncer reason code (for example disposable_domain, burner_mx, repeat_inbox, datacenter_ip): what it means, how many points it adds or whether it blocks alone, and the lowest plan on which it counts. Without a code, lists every code.
lookup_burner_domain Says whether a domain is on SignupBouncer's disposable (burner) email list, a known relay service or a free subdomain mail service, or a known real mailbox provider, and when our harvester observed it. Uses only the loaded lists, no DNS lookup, so a brand-new burner domain on a burner mail server is
integration_guide Returns the steps and the copy-paste code that checks new signups with SignupBouncer in one stack: supabase (a hook, no code), fetch (any TypeScript server), nextjs, express, hono, python, firebase or better-auth. Use it when the user is building or changing a signup, register or auth flow. The code

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