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DELIVERABILITY & INBOX CONFIRMATION

Email Verification API

Real-time email verification and deliverability API by ProWebLook. Validates email syntax, queries receiving mail exchangers, and returns detailed deliverability signals—including mailbox existence, deliverable/undeliverable verdicts, catch-all server detection, and reason codes.

Explore plans See how it works

25 free requests per application · monthly allowance.

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Trust score
75 / 100
Versions
v1
Endpoints
3

02 THE BIGGER PICTURE

An email address is more
than syntax on a screen.

When an email address enters your product, deliverability matters. Is it syntactically valid? Does the domain have active MX records? Does the remote mail exchanger confirm the mailbox exists?

Email Verification brings those signals into a single API request. Use the returned data to prevent fake registrations, protect sender reputation, and maintain clean subscriber databases across your workflow.

One address goes in. Structured verification JSON comes back. You decide how that information fits your application.

Check syntax & deliverability

Understand mailbox validity, domain structure, and reachability.

MX & SMTP verification

Connect directly with destination mail exchangers to verify inbox existence.

Detect disposable & risky mail

Identify temporary inboxes, spam traps, and low-reputation mail domains.

Clean application records

Use structured verification signals to keep contact databases reliable.

03 PUT CONTEXT TO WORK

Small steps.
Useful possibilities.

Where this API can fit into your application. Your product controls the decisions that follow.

01 /

Clean lists at signup.

Add a real-time validation step to user registration or contact forms. Prevent fake, disposable, or mistyped email addresses before they enter your database.

02 /

Protect sender reputation.

Filter out hard bounces and inactive mailboxes prior to large email campaigns to keep domain and IP deliverability high.

03 /

Catch-all and MX verification.

Detect receiving mail exchangers, MX records, and SMTP server responsiveness with detailed deliverability signals.

04 MADE FOR YOUR WORKFLOW

Your integration.
A straightforward start.

Choose an endpoint, subscribe, and connect your application key right in the request builder.

Endpoint documentation

GET /emailvalidation

Email Verification

Verify email syntax and mailbox deliverability in real time without sending an email. Validates email syntax, queries receiving mail exchangers, and returns detailed deliverability signals—including mailbox existence, deliverable/undeliverable verdicts, catch-all server detection, and reason codes.

Parameters

emailRequired
query · string

The email address to verify (e.g. user@example.com).

Integration facts

  • No provider credentials are exposed to you
  • Requests are metered against your plan
  • Captured bodies are encrypted and kept 7 days

AI & Coding Agents

One-click MCP & llms.txt

The PayloadAPI Edge Gateway automatically bridges this API into a JSON-RPC 2.0 MCP server at /email-verification-api/v1/mcp. Tool discovery (initialize, tools/list) is quota-free; tools/call executions meter against your active plan.

View /apis/email-verification-api/llms.txt
Add to .cursor/mcp.json
{
  "mcpServers": {
    "payloadapi-email-verification-api": {
      "url": "https://gateway.payloadapi.com/email-verification-api/v1/mcp",
      "headers": {
        "Authorization": "Bearer ${env:PAYLOADAPI_KEY}"
      }
    }
  }
}

Synthesized MCP tools (3)

get_checkemailGET /checkemail
Required: email

MCP tool — Verify Email Address (Alternative Endpoint)

get_emailvalidationGET /emailvalidation
Required: email

MCP tool — Email Verification

post_emailvalidationPOST /emailvalidation
Required: email

MCP tool — Email Verification (POST)

Live request

Request builder

Your first request starts here

Try Email Verification API with a free account.

25 free requests per application · monthly allowance. Create an account, connect an application, and activate your plan right here.

No payment details needed for this free allowance.

This endpoint does not accept a request body.

Sending calls the gateway for real: it authenticates your key, counts the request against your plan, and returns whatever the provider returns.

curl --request GET 'https://gateway.payloadapi.com/email-verification-api/v1/emailvalidation' --header "Authorization: Bearer $PAYLOADAPI_KEY" --header 'Content-Type: application/json' --header 'X-Payload-Trace: enabled'

Streamed response

Response

Send a request to inspect status, headers, timing, cost, and streamed body chunks.

05 A PLAN FOR YOUR NEXT STEP

Start with the right plan.

Choose a plan for your application. New here? Create your first application and get its API key as part of setup, right on this page.

LIVE PLAN01

Pay-As-You-Go

$0.002USD · default rate per request
  • No included allowance published
  • No recurring fee
  • $0.002 USD default usage rate per request
LIVE PLAN02

Free

$0.00USD · Free allowance
  • 25 requests per application
  • Monthly allowance · subscription anniversary
  • No payment or overage charges

Prices are shown in each plan’s published currency. Default usage rates can be overridden for individual endpoints.

DO THE NUMBERS

A quick usage estimate.

Based on Pay-As-You-Go’s default rate. Endpoint-specific rates and taxes are not included.

$20.00USD estimated usage

06 GOOD TO KNOW

The details
before you begin.

Trust breakdown (75/100)View signals
  • Upstream safety30 / 30 ptsPassed

    Upstream origin and hosts passed all safety, allowlist, and SSRF restrictions.

  • Specification completeness10 / 25 ptsNeeds attention

    Endpoints manually defined without an OpenAPI specification.

  • Duplicate protection20 / 20 ptsPassed

    No name or upstream host collision detected against published listings.

  • Provenance & standing15 / 25 ptsNeeds attention

    Verified organization under review evaluation.

How do I get started?

Choose an available plan here. Select an existing application or create your first one during setup, save its API key, and activate your plan. Then use the key in the request builder. Requests call the gateway for real and count against your plan.

Do free requests reset every month?

Check the allowance period on each plan. A one-time allowance does not reset. A monthly free allowance renews on the subscription anniversary. Free allowances are per application.

Does verification guarantee 100% email delivery?

Email verification confirms domain MX records, syntax, and remote SMTP server acceptance. Some email providers use catch-all configurations or temporary greylisting, which the API flags in the verdict and reason code.

Why are some plans unavailable for activation?

Their published pricing is available for comparison. Free allowances can be activated here; commercial plans with active checkout can be purchased. Custom enterprise tiers require contacting the provider directly.

What does the trust score tell me?

The score summarizes recorded catalog verification checks. Review the breakdown for individual signals; it is not an uptime or performance guarantee.

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