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Phone validationValidate supported phone-number quality signals in bulk or API workflows.Email validationAdd supported email-validity signals to contact-data workflows.Carrier lookupReturn carrier and line-type data where coverage is verified.Number generatorGenerate dialer-ready candidate numbers by region, locality, carrier and line type.Bulk verificationUpload, preflight, quote, process, and export large lists.Developer APIFirst-party asynchronous jobs, results, idempotency, and webhooks.
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CRM cleaningNormalize and verify contact fields without destructive cleanup.Signup verificationCatch bad contact data around onboarding without confusing it with OTP.Fraud preventionUse contact-data signals as explainable inputs in a broader risk model.Data migrationProfile and clean contact identifiers before CRM or warehouse cutover.Customer engagementPrepare cleaner, freshness-aware segments for downstream workflows.
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API documentationAuthentication, jobs, results, errors, limits, and idempotency.QuickstartCreate a small test job and handle the asynchronous lifecycle safely.Libraries & SDKsREST examples today; official SDK status is shown explicitly.WebhooksSigned events, retries, idempotent consumers, and delivery history.ChangelogCompatibility-aware product and API release notes.
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Blog & guidesPractical phone, email, freshness, and API guides.ToolsE.164 formatter, CSV cleaner, deduplicator, and cost calculator.GlossaryPlain-language verification, cache, carrier, and API terms.CoverageService and country availability published only after verification.SupportDocs, status, account support, and sales help.
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AboutWhy phoneveriflo is built around transparent verification workflows.SecurityImplemented application controls and production security boundaries.PrivacyPrivacy policy draft and data-handling framework.TermsService, API, billing, and acceptable-use terms framework.ContactSales, implementation, support, and product questions.
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Home›Developers›Libraries & SDKs
Developer Tooling & SDKs

Integrate from Any Stack — Without Pretending an Unpublished SDK Exists

phoneveriflo is 100% REST-first. Integrate immediately with copy-ready, production-grade snippets across 8 backend languages, or track the release status of our official typed client libraries.

Follow Quickstart Guide API Reference Docs Developer API Overview
REST API Ready Today 8 Language Implementations HMAC Signature Verification Explicit Publication Status
Integration ReadinessREST-First

Every environment with HTTPS capabilities can submit asynchronous jobs and verify signed webhooks.

TypeScript / Node.jsTS / JS
PythonPython 3.9+
GoGo 1.20+
cURL & ShellCLI / Bash
PHPPHP 8.1+
RubyRuby 3.0+
C# / .NET.NET 7 / 8 / 9
Java / KotlinJava 17+
Copy-Ready Code Suite

Multi-Language Integration Workbench

Select your language and operation to get battle-tested, copy-ready client code with error handling, idempotency, and type safety.

Create Asynchronous Verification Job

Submits a list of contact inputs to the verification pipeline using native fetch and strict idempotency.

import { randomUUID } from "crypto";

interface CreateJobOptions {
  service: "phone-validation" | "email-validation" | "carrier-lookup";
  inputs: string[];
  webhookUrl?: string;
  metadata?: Record<string, string>;
}

interface JobResponse {
  ok: boolean;
  data: {
    id: string;
    service: string;
    status: "queued" | "preparing" | "verifying" | "completed";
    item_count: number;
    max_quote_micros: number;
    created_at: string;
  };
}

export async function submitVerificationJob(options: CreateJobOptions): Promise<JobResponse> {
  const apiKey = process.env.PHONEVERIFLO_API_KEY;
  if (!apiKey) throw new Error("PHONEVERIFLO_API_KEY environment variable is required");

  const response = await fetch("https://api.phoneveriflo.com/api/v1/jobs", {
    method: "POST",
    headers: {
      "Authorization": `Bearer ${apiKey}`,
      "Content-Type": "application/json",
      "Idempotency-Key": randomUUID(),
    },
    body: JSON.stringify({
      service: options.service,
      inputs: options.inputs,
      webhook_url: options.webhookUrl,
      metadata: options.metadata,
    }),
  });

  if (!response.ok) {
    const errorData = await response.json().catch(() => ({}));
    throw new Error(errorData.error?.message || `Job submission failed with status ${response.status}`);
  }

  return response.json();
}

// Example usage:
const job = await submitVerificationJob({
  service: "phone-validation",
  inputs: ["+14155552671", "+447700900123"],
  webhookUrl: "https://api.myapp.com/webhooks/phoneveriflo",
});
console.log("Job Submitted ID:", job.data.id);
Runtime target: Node.js 18+, Bun, Deno, Next.js, Cloudflare WorkersPackage status: REST-First (No external dependencies required)
Transparency & Roadmap

Official SDK Package Publication Status

We never advertise unpublished SDK packages as installed until they exist in public package registries with semantic versioning and continuous integration test coverage.

SDK Package Registry & Release Status

Language / StackPackage NameRegistry TargetPublication StatusType ModelsIdempotencyWebhook Verifier
Node.js / TypeScript@phoneveriflo/sdknpm / yarn / pnpmBeta (Q3 2026)Yes (Strict TS)Auto UUIDv4HMAC Verifier
PythonphoneverifloPyPI (pip)Planned Q3 2026Pydantic v2Auto UUIDv4FastAPI / Flask Helper
Gophoneveriflo-goGo ModulesPlanned Q4 2026Struct TagsMiddlewarehttp.HandlerFunc
PHPphoneveriflo/phoneveriflo-phpPackagist (Composer)Planned Q4 2026PHP 8.2+ DTOsMiddlewareLaravel / PSR-7
RubyphoneverifloRubyGemsPlanned Q4 2026Ruby ObjectsMiddlewareRack Middleware
.NET / C#Phoneveriflo.ClientNuGetPlanned Q4 2026C# RecordsDelegatingHandlerASP.NET Core Filter
Java / Kotlincom.phoneveriflo:clientMaven CentralPlanned Q4 2026Java RecordsInterceptorSpring Web Interceptor

Why REST-First?

You don't have to wait for SDK updates or manage dependency lockfiles. Our stable JSON contracts and standard HTTPS endpoints are ready in minutes from any language.

What Official SDKs Will Add

When published, official packages provide typed request builders, automatic UUID idempotency middleware, built-in webhook signature validators, and transparent connection pooling.

Version Compatibility

Every API change is backwards-compatible. Non-breaking additive fields are introduced without breaking changes, and migrations are documented in the Changelog.

Best Practices

Production Architecture Guidelines

Follow these battle-tested patterns to ensure maximum reliability, security, and throughput.

1. Server-Side Key Isolation

Never expose secret API keys (pv_live_...) in frontend browser applications, mobile bundles, or public repositories. All verification requests must originate from your secure backend servers or cloud workers.

2. Idempotency on Every Write

Always supply a unique Idempotency-Key header (such as a UUID v4) when calling POST /api/v1/jobs. If a network blip occurs during job submission, retrying with the same key returns the existing job without double-billing.

3. Webhook Replay Attack Defense

Always verify the timestamp inside the X-Veriflo-Signature header. Reject any webhook event older than 300 seconds (5 minutes) to prevent replay attacks, and compare signatures using constant-time algorithms.

4. Rate Limit Backoff & Jitter

When consuming API endpoints at high throughput, respect the Retry-After response header on HTTP 429 status codes. Implement exponential backoff with full jitter to avoid thundering herds.

FAQ

Libraries & Integration FAQs

Can I integrate phoneveriflo without an official SDK package?

Yes. phoneveriflo is 100% REST-first. You can use standard HTTP client libraries (such as fetch in TypeScript/Node, httpx or requests in Python, net/http in Go, or HttpClient in C#/Java) using our copy-ready snippets above.

Where should I store and manage API keys?

Store your API keys as server-side environment variables (e.g. PHONEVERIFLO_API_KEY) or in a secure secret manager (such as AWS Secrets Manager, Vault, or Doppler). Never bundle keys into frontend React/Vue code.

How can I test webhooks locally during development?

Use a tunneling tool like ngrok or Cloudflare Tunnels to route webhook events to your local development machine (e.g. https://abc.ngrok-free.app/webhooks/phoneveriflo). Make sure your test receiver validates the HMAC signature.

When will official package manager SDKs be published?

Our Node.js / TypeScript SDK is currently in Beta and targeted for Q3 2026. Python, Go, PHP, Ruby, and .NET packages will follow in Q3/Q4 2026. Check the Changelog for release announcements.

Ready to Integrate?

Get your API credentials and start in under 5 minutes.

Generate test or production keys in your dashboard, copy the code snippet for your stack, and verify your first contact records.

Get API Key Quickstart Guide
phoneveriflo

Verification workflows with transparent preflight pricing, provider-neutral results, and visible freshness metadata.

Platform status

Products

Phone validationEmail validationCarrier lookupNumber generatorBulk verificationDeveloper API

Solutions

CRM cleaningSignup verificationFraud preventionData migrationCustomer engagement

Developers

API documentationQuickstartLibraries & SDKsWebhooksChangelog

Resources

Blog & guidesToolsGlossaryCoverageSupport

Company

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