Email health infrastructure

POST /v1/verifyMonitoring enabledSelf-serve API keys

Email verification that doesn't stop after signup.

Verify emails in real time, clean lists in bulk, and continuously monitor mailbox health inside your CRM and outbound stack.

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Real-time verify

Verify at signup, import, or just before send.

Continuous monitor

Watch mailbox and domain drift after the first verdict.

System sync

Push updates into CRMs, outbound tools, and workflows.

Self-serve from day one. No call required.

RequestPOST /v1/verify

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

Response

monitoring active

{
  "email": "alex@company.com",
  "status": "deliverable",
  "substatus": "none",
  "confidence": 0.94,
  "reasons": ["valid_syntax", "mx_found"],
  "monitoring": {
    "state": "stable",
    "next_check_at": "2026-05-22T10:00:00Z"
  }
}

Monitoring update

3 contacts changed from deliverable to risky this week.

1 domain shows MX instability.

Recommended action: recheck active leads before next campaign.

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

Verify

Real-time verdicts for forms, imports, and API requests with operational metadata.

Low-latency JSON responses, confidence, substatus, and monitoring enrollment.

Clean

Bulk verification for backfills, uploads, and campaign prep without spreadsheet workarounds.

Batch jobs for CSVs and CRM exports with consistent response structure.

Monitor

Detect status drift after the first check and sync changes everywhere your team works.

Continuous mailbox and domain health tracking with downstream updates.

How it works

Input to verified, monitored, and synced.

Continuum turns email health into a continuous system of record across forms, imports, CRM data, and outbound tooling.

Input

Add emails from forms, CSVs, CRMs, or outbound tools.

Verify

Run syntax, domain, and mailbox checks in real time.

Track changes

Detect status drift and domain health changes over time.

Sync everywhere

Push updates into CRMs, outbound systems, and workflows.

Monitoring

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

Mailbox and domain health change over time. Continuum 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

deliverable → risky

Mailbox behavior changed for active outbound contacts.

12m ago · 3 contacts · pushed to HubSpot

campaign protection

risky → undeliverable

Recheck threshold crossed before next send window.

31m ago · 1 sequence paused · webhook sent

recovered signal

unknown → deliverable

A previously inconclusive address became safe to route.

1h ago · sales queue updated

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 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.

Continuum fits existing forms, CRMs, outbound tools, and automation without adding a manual ops layer.

HubSpot

Salesforce

Pipedrive

CSV

Webhooks

Outbound tools

Docs preview

API-first from the first request.

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

QuickstartPOST https://api.continuum.dev/v1/verify

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

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

{
  "email": "alex@company.com",
  "status": "deliverable",
  "confidence": 0.94,
  "monitoring": {
    "state": "stable",
    "enrolled": true,
    "next_check_at": "2026-05-22T10:00:00Z"
  }
}

Monitoring event example

webhook

event: contact.status_changed

{
  "from": "deliverable",
  "to": "risky",
  "reason": "mx_instability",
  "sync_targets": ["hubspot", "webhook"]
}

Pricing

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

Designed for self-serve teams first, with API access and monitoring included from the start.

Free

$0/mo

Start verifying in minutes.

100 verifications
Basic monitoring
API access

Start free

Growth

Popular

$149/mo

For teams running active lifecycle flows.

More verifications
Monitored contacts
Webhooks
CRM sync

Start free

Scale

$599/mo

For high-volume infrastructure teams.

Higher volume
Advanced monitoring
Priority support

Start free

Designed for self-serve teams first.

Get started

Verify once. Monitor continuously.

Get started in minutes with API access, bulk verification, and continuous monitoring.

Start free View docs

No demo required.