SignupBouncer

Tools

Token cost is the o200k count of the tools list JSON, including schemas, before any tool is called.

• 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 wit

• 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

• 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

• 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