NeverBounce API review

The actions you pay for, as NeverBounce prices them in credits.

US dollars, as NeverBounce's pricing page shows them on 25 Oct 2026. Monthly and annual billing are shown apart.

Free tier 10 free credits on signup with a business email (live: they show as paid_credits_remaining, free_credits_remaining 0); free list analysis (bounce-rate estimate); no card needed

Full PAYG ladder read from the page's embedded pricing data (the visible slider is behind a 'Press & Hold' bot challenge in headless). PAYG credits expire 12 months after purchase. First-time in-app banner offers 10% off with code VERIFY10 (24-hour countdown). Prices shown in USD from both the public page and the in-app page.

Bulk: 10 concurrent jobs and max 50 runs per day per account; do not create more than 10 jobs per 100k items per hour; submit lists under 1M as one job, split larger ones into 1M chunks; 25 MB request cap.

NeverBounce uses API key. The steps below follow NeverBounce's own docs.

1. Create a NeverBounce account. API access starts on the Growth plan.
2. Dashboard -> API (/apps) -> Custom Integration -> Create New; the app overview shows the key. The docs' direct link app.neverbounce.com/apps/custom-integration/new returned 404 live on 2026-10-25. V3 username/secret do not work on V4.
3. Send it with every request: query string or POST body parameter 'key'.
4. Make a first call: Create a bulk verification job from supplied data or a remote URL. Keep the key in an environment variable, never in the command.
   Copy

   curl -X POST "https://api.neverbounce.com/v4.2/jobs/create?key=$NEVERBOUNCE_API_KEY" \
     -H "Content-Type: application/json" \
     -d '{}'

Other Verification tools in this directory, each with its own review.

Bouncer

Verification

From $25/moOfficial MCP

Best for high-volume batch verification with clear published rate limits.

Bouncer API review →

MillionVerifier

Verification

Best for cheapest bulk cleaning of large lists.

MillionVerifier API review →

ZeroBounce

Verification

Free planOfficial MCP

Best for verifying every address before it enters a sequencer.

ZeroBounce API review →

Four things to settle first, each read off NeverBounce's own pages.

• Confirm the API is on your planAPI access starts on the Growth plan. Free tier: 10 free credits on signup with a business email (live: they show as paid_credits_remaining, free_credits_remaining 0).
• Keep the key out of your codeAPI key. It is sent as: query string or POST body parameter 'key'.
• Design around the rate limitBulk: 10 concurrent jobs and max 50 runs per day per account; do not create more than 10 jobs per 100k items per hour; submit lists under 1M as one job, split larger ones into 1M chunks; 25 MB request cap.
• Know the catch before you scaleUsing single/check to clean an existing list one-by-one can get the account locked and API access disabled; use jobs.