# Signaliz, top-up: Email verification API

> Verify whether one email address is valid and deliverable.

Signaliz's email verification API on its Pay As You Go plan. It costs $0.20 per 1,000 emails. It returns 2 of the 6 key fields we check: Address, Deliverability.
Half of the 3,214 plans we rank by price cost $1.998 per 1,000 emails or less. This plan costs less per 1,000 emails than 93% of the 3,214 plans.
[treg's top-up from $10](https://datacircle.dev/validate-email-apis/treg/top-up-from-10/llms.txt) costs the least per 1,000 emails: $0.00 on average. treg asks one provider after another until one answers. You pay $68.365 per 1,000 emails when no provider answers.
[Disify's $9 monthly plan (/email)](https://datacircle.dev/validate-email-apis/disify/9-monthly-starter-post-email/llms.txt) covers any number of emails. Disify's $9 monthly plan costs less up front than treg's top-up from $10.
[MailTester Ninja](https://datacircle.dev/validate-email-apis/mailtester-ninja/23-99-monthly/llms.txt), [Signaliz](https://datacircle.dev/validate-email-apis/signaliz/top-up/llms.txt) and [Enrich.so](https://datacircle.dev/validate-email-apis/enrich-so/149-monthly/llms.txt) are the best email verification API providers in our benchmark.

- This page: https://datacircle.dev/validate-email-apis/signaliz/top-up
- [Best email verification API in 2026: providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://signaliz.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://api.signaliz.com/functions/v1/api/v2/verify-email`
- API key: with the plan, on https://signaliz.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://signaliz.com/api-documentation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: Signaliz (https://signaliz.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-02

## In the answer

- Completeness: 33%
- Address: ✓
- Deliverability: ✓

## Score

- Overall score: 77.4
- Price score: 82
- Accuracy score: 85
- Cost to get started score: 93
- Bundle score: 75
- Performance score: 12

## Price

- $ per 1,000 emails: $0.20
- Per: result
- Billing: pay first

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Find Email · Company Signal Enrichment · Signal Awareness

## In their words

- Their pitch: Verify whether one email address is valid and deliverable.

## Data

- Freshness: stored
- What it checks: format, disposable domains, role addresses, mailbox
- Keep data: no limit
- Use data: You agree to use our Services in compliance with all applicable laws and regulations. You agree not to: Process any data in violation of applicable data protection laws (e.g., GDPR, CCPA). Use the Services to send spam or unsolicited communications. Ingest data that is unlawful, harmful, or infringes on intellectual property rights. Attempt to reverse engineer, disrupt, or gain unauthorized access to the Services. Use the Services for any purpose other than your internal business operations. [...] a limited, non-exclusive, non-transferable license to use the Services for your internal business purposes during the term of your subscription

## Rate limit

- Batch: 5,000

## Speed

- Answer: in the call or by polling
- Median: 3.98 s

## The call

- You send: email. Optional: requests[].email, requests[].idempotency_key, dry_run, concurrency, batch_item_indices, job_id, verification_run_id, idempotency_key, page, page_size
- Method: POST
- Path: /v2/verify-email

## About the plan

- Plan: Pay As You Go
- Who can get it: anyone

## The 17 fields the plan's answer can hold

index, email, status, catch-all, ok to send, credits charged, diagnostics scope, diagnostics results returned, diagnostics verified count, diagnostics blocked count, diagnostics valid-but-blocked count, diagnostics verdict counts, diagnostics send safety rule, total, succeeded, failed, results

## Signaliz's plans (3)

- [Signaliz, top-up](https://datacircle.dev/validate-email-apis/signaliz/top-up/llms.txt): $0.20 per 1,000, 33% complete, stored
- [Signaliz, $249 monthly](https://datacircle.dev/validate-email-apis/signaliz/249-monthly/llms.txt): $0.20 per 1,000, 33% complete, stored
- [Signaliz, $499 monthly](https://datacircle.dev/validate-email-apis/signaliz/499-monthly/llms.txt): $0.20 per 1,000, 33% complete, stored

## Signaliz's calls for this API (1)

- `POST /v2/verify-email`: [Signaliz, top-up](https://datacircle.dev/validate-email-apis/signaliz/top-up/llms.txt)

## Signaliz's APIs (2)

- [Signaliz: email verification API pricing, 3 plans](https://datacircle.dev/validate-email-apis/signaliz/top-up/llms.txt)
- [Signaliz: email finder API pricing, 3 plans](https://datacircle.dev/find-email-apis/signaliz/top-up/llms.txt)

## Signaliz: email verification API alternatives

- [Check Mail, $99 monthly](https://datacircle.dev/validate-email-apis/check-mail/99-monthly/llms.txt): $0.198 per 1,000, 50% complete, stored
- [Elastic Email, $999 monthly, Email API Pro (5,000,000 emails/month), POST /verifications/{email}](https://datacircle.dev/validate-email-apis/elastic-email/999-monthly-email-api-pro-5000000-emails-month-post-verifications-email/llms.txt): $0.20 per 1,000, 50% complete, stored
- [StopReg, $100 monthly](https://datacircle.dev/validate-email-apis/stopreg/100-monthly/llms.txt): $0.20 per 1,000, 50% complete, stored
- [UserCheck, $100 monthly, Pro 500k, POST /v1/gates/{gate_id}/decisions, Decision endpoint](https://datacircle.dev/validate-email-apis/usercheck/100-monthly-pro-500k-post-v1-gates-gate-id-decisions-decision-endpoint/llms.txt): $0.20 per 1,000, 50% complete, stored

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-02.

- https://api.signaliz.com/functions/v1/api/v1/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://signaliz.com/api-documentation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://signaliz.com/developers/api-reference?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://signaliz.com/developers/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://signaliz.com/docs/errors?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://signaliz.com/for-agents?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://signaliz.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://signaliz.com/terms-of-service?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing