Built by SignalPulse Technologies

Email health infrastructure

POST /v1/verifyMonitoring enabledSelf-serve API keys

Email verification and deliverability API — verify once, monitor continuously

98%+ accuracy across 12 verification layers — verified once, then continuously monitored.

Continuum API verifies emails in real time, cleans lists in bulk, and continuously monitors mailbox health inside your CRM and outbound stack.

Get free access →View API docs

Self-serve — get your API key in 30 seconds.

RequestPOST /v1/verify

{
  "email": "alex@company.com"
}

Response

monitoring active

{
  "id": "cmofz5wme0001",
  "email": "alex@company.com",
  "domain": "company.com",
  "status": "valid",
  "subStatus": null,
  "checks": {
    "syntaxValid": true,
    "mxFound": true,
    "mxRecords": ["mail.company.com"],
    "isDisposable": false,
    "isRoleAccount": false,
    "smtpChecked": false,
    "smtpReachable": null,
    "isCatchAll": null,
    "greylisted": false,
    "spfValid": true,
    "dmarcValid": true,
    "dkimFound": true,
    "blacklisted": false
  },
  "score": 72,
  "durationMs": 38,
  "checkedAt": "2026-04-26T16:20:40.932Z"
}

Monitoring update

3 contacts changed from valid to risky this week.

1 domain shows MX instability.

Recommended action: recheck active leads before next campaign.

Continuum API verifies emails in real time and monitors their health continuously.

checks per email

< 50ms

avg response

100k+

emails verified

99.9%

uptime

Verification layers

Twelve independent checks. One clean verdict.

Each verification layer runs in parallel and contributes to the final score, so you can route, suppress, or enrich with confidence.

Syntax validation

RFC-compliant parsing catches malformed addresses before they reach your stack.

MX record check

Confirms the domain has live mail exchanger records and resolves correctly.

Disposable detection

Blocks throwaway and temporary mailbox providers used to bypass signups.

Role account detection

Flags shared inboxes like info@ or support@ that hurt deliverability.

SMTP probing

Optional mailbox-level handshake to confirm the address actually exists.

Continuous monitoring

Re-checks verified contacts so status drift never silently breaks campaigns.

SPF validation

Checks if the sender domain has a valid SPF record configured.

DMARC policy check

Verifies DMARC policy exists to prevent email spoofing.

Domain blacklist check

Checks domain against Spamhaus, Barracuda, and other major blacklists.

Phone Intelligence

Phone Intelligence API

Validate, classify, and risk-score phone numbers in a single request — built on the same infrastructure as our email API.

POST /v1/verify/phone

Format validation
Line type detection
Country & carrier detection
Risk scoring

Response200 OK

{
  "valid": true,
  "lineType": "mobile",
  "isMobile": true,
  "country": "US",
  "carrierHint": "Verizon Wireless",
  "e164": "+14155552671",
  "riskScore": 12,
  "riskLevel": "low"
}

IP Intelligence

IP Intelligence API

Geolocate IPs, detect VPNs and proxies, and score risk in real time — perfect for signup fraud and abuse prevention.

POST /v1/verify/ip

Geolocation
VPN/proxy detection
ISP identification
Risk scoring

Response200 OK

{
  "valid": true,
  "country": "US",
  "city": "San Francisco",
  "isp": "Cloudflare, Inc.",
  "isProxy": false,
  "isVpn": false,
  "riskScore": 8,
  "riskLevel": "low"
}

Accuracy

How accurate is it?

Each layer targets a specific failure mode. Together they reach 98%+ accuracy without bouncing legitimate inboxes.

Check type	What it catches	Included in free
Syntax validation	Malformed and unparseable addresses
MX record check	Domains with no working mail server
Disposable detection	Throwaway / temporary inbox providers
Role account detection	Shared mailboxes (info@, support@, sales@)
Catch-all detection	Domains accepting all mail with no verification
Greylisting awareness	Servers temporarily deferring SMTP requests
SMTP probing	Mailboxes that look valid but don't exist
Domain health monitoring	MX changes, DNS drift, and routing shifts
Continuous re-verification	Contacts that go stale after the first check
SPF validation	Domains missing sender policy
DMARC check	Domains vulnerable to spoofing
Blacklist check	Known spam/malicious domains

Monitoring

Verification is a point-in-time check. Continuum API keeps going.

Mailbox and domain health change over time. Continuum API tracks that drift, summarizes it clearly, and alerts your systems when the status changes.

Monitoring starts from the first verification and continues in the background.

status drift

valid → risky

Mailbox behavior changed for active outbound contacts.

12m ago · 3 contacts · pushed to HubSpot

campaign protection

risky → invalid

Recheck threshold crossed before next send window.

31m ago · 1 sequence paused · webhook sent

domain watch

domain health changed

MX instability detected for a monitored account domain.

3h ago · domain watchlist triggered

delivery risk

catch-all detected

Routing behavior shifted and confidence rules were adjusted.

today · outbound scoring recalculated

AI-assisted summaries

Autonomous monitoring. Human-readable actions.

Continuum API uses AI-assisted summaries to make monitoring output useful, concise, and operational without turning the product into an AI workflow.

Configuration change observed

3 contacts became risky after a domain configuration change.

Useful summary generated from monitoring events, not a chat UI.

List health trend

This list shows increased mailbox risk across recently active prospects.

Operational guidance for prioritizing rechecks before launch.

Recommended next action

Reverify active pipeline contacts before the next campaign starts.

Suggested action stays tied to verifications, domains, and syncs.

Integrations

Built to fit the systems you already use.

Connect Continuum API to forms, CRMs, automation tools, and outbound stacks without building glue code.

REST API

Webhooks

CSV Upload

HubSpot

Salesforce

Zapier

Make.com

How it works

From signup to monitoring in three steps.

Continuum API is built for self-serve adoption — no demo, no sales call, no waiting room.

Step 01

Get your API key

Step 02

Verify your first email

One API call returns a verdict with 9 checks and a confidence score.

Step 03

Monitor continuously

Enroll addresses in monitoring. Get webhooks when status changes.

Built to integrate with

HubSpot

Salesforce

Zapier

Make.com

Docs preview

API-first from the first request.

Clean docs, self-serve authentication, and explicit monitoring payloads make Continuum API feel like infrastructure instead of a generic SaaS workflow.

QuickstartPOST /v1/verify

curl -X POST https://api.continuumapi.com/v1/verify \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"email":"alex@company.com"}'

Endpoint semantics

Returns a verification verdict immediately.

Enrolls the address into ongoing monitoring when enabled.

Produces webhook-ready change events when health drifts later.

Response200 OK

{
  "id": "cmofz5wme0001",
  "email": "alex@company.com",
  "domain": "company.com",
  "status": "valid",
  "subStatus": null,
  "checks": {
    "syntaxValid": true,
    "mxFound": true,
    "mxRecords": ["mail.company.com"],
    "isDisposable": false,
    "isRoleAccount": false,
    "smtpChecked": false,
    "smtpReachable": null,
    "isCatchAll": null,
    "greylisted": false,
    "spfValid": true,
    "dmarcValid": true,
    "dkimFound": true,
    "blacklisted": false
  },
  "score": 72,
  "durationMs": 38,
  "checkedAt": "2026-04-26T16:20:40.932Z"
}

Monitoring event example

webhook

{
  "event": "email.status_changed",
  "monitorId": "mon-abc123",
  "email": "alex@company.com",
  "previousStatus": "valid",
  "newStatus": "risky",
  "source": "scheduled",
  "checkedAt": "2026-04-27T10:00:00.000Z",
  "apiVersion": "2"
}

Pricing

Self-serve plans for teams that want to ship now.

Start free, upgrade when you scale. No demo required.

Free

Start verifying in minutes.

$0/mo

1,000 verifications / month
API access
No bulk uploads
No monitoring
No webhooks

Get free access →

Starter

For small projects ramping up — pay only for what you use.

Pay as you go$0.005 / verify

Up to 5,000 verifications / month
Bulk CSV up to 5,000 rows
Monitor 5 addresses
Webhooks included

Get free access →

Growth

For teams running active lifecycle flows.

$49/mo

15,000 verifications included
$0.003 / verify overage
Unlimited bulk CSV
Monitor 500 addresses
Webhooks included

Get free access →

Scale

For high-volume infrastructure teams.

$199/mo

100,000 verifications included
$0.002 / verify overage
Unlimited bulk CSV
Unlimited monitoring
Priority webhooks & support

Get free access →

Get started

Verify once. Monitor continuously.

Get API access, bulk verification, and continuous monitoring — self-serve, no demo required.

Get free access →View docs

Self-serve — get your API key in 30 seconds.

Trusted security

Data processed in transit only

No email storage

SOC2 ready

GDPR compliant