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SDKs and libraries

Idiomatic code per language rather than one snippet with the syntax swapped, including the timeout and fail-open behavior you want in front of a signup form.

Email validation in Python: regex, SMTP, API

Validate email in Python four ways: a regex, the email-validator package, an smtplib handshake and the ZapBounce API, with retries and the unknown branch.

Email verification in .NET

Verify email addresses from .NET: a typed client registered in DI, background verification with a hosted service, and Channel-based bounded concurrency.

Email verification in C#

Verify email addresses from C#: IHttpClientFactory, System.Text.Json with camelCase, Polly retries, and CancellationToken plumbed through every call.

Email verification in Django

Wire ZapBounce into Django: a form field validator that fails open, a Celery task that polls bulk jobs, and 429 backoff from the rate-limit window.

Email verification in Express

Add ZapBounce to an Express app: signup middleware with a hard timeout, a bulk job route, and a status route that polls it until it finishes.

Email verification in Flask

Add ZapBounce to a Flask app: a signup check that fails open, an RQ job that polls bulk jobs, and 429 backoff from the rate-limit window.

Email verification in Go

Verify email addresses from Go: 1 reused http.Client with sane timeouts, context cancellation, typed errors, and a bounded worker pool for bulk.

Email verification in Java

Verify email addresses from Java 11+ with the built-in HttpClient: synchronous and async calls, Jackson binding, a retry loop, and a virtual-thread note.

Email verification in Laravel

Add ZapBounce to Laravel: a validation rule for signup, a queued job for list cleaning, Http::retry, and a polling job that collects the results.

Email verification in Next.js

Verify emails in the Next.js App Router: a server action for signup and route handlers for bulk jobs, with the API key kept off the client.

Email verification in Node.js

Verify email addresses from Node.js with built-in fetch: single checks, bulk jobs, AbortSignal timeouts, and all 4 results handled properly.

Email verification in Postman

Set up ZapBounce in Postman: 2 environments for separate keys, collection auth, a test for the unknown branch, and the runner for bulk jobs.

Email verification in Rails

Wire ZapBounce into Rails: a custom ActiveModel validator that fails open, an ActiveJob for list cleaning, and a polling job that imports the results.

Email verification in Ruby

Verify email addresses from Ruby with Net::HTTP and 0 gems: a persistent connection, an Enumerator over job rows, and retry with backoff.

Email verification in Rust

Verify email addresses from Rust with reqwest and serde: a typed verdict enum, thiserror error types, the ? operator, and bounded concurrency with futures.

Email verification in Spring Boot

Call ZapBounce from Spring Boot with RestClient: a bean with timeouts, a constraint validator for signup, @Async bulk jobs, and 429 backoff.

Email verification in TypeScript

Type the ZapBounce API in TypeScript: a union over the 4 results so the compiler makes you handle unknown, plus typed errors and a jobs flow.

Email verification over MCP

Expose ZapBounce to Claude and other MCP clients as 1 tool: the server definition, the tool schema, and why the assistant must see unknown results.

Email verification with cURL

Every ZapBounce endpoint as a copy-paste curl command: verify 1 address, submit a bulk job, poll it, export the CSV, and read errors by request id.

Validate email in PHP: filter_var, DNS, SMTP

Validate email in PHP step by step: filter_var for syntax, getmxrr for the domain, an SMTP probe over fsockopen, then the ZapBounce API with Guzzle.

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