# Horizon Pulse, pay as you go: Email verification API

> Email address check for one address: RFC 5322 syntax, MX records (null MX noted), SPF and DMARC records over DNS, role-account flag (info@, admin@ and similar) and a disposable-domain match. No SMTP connection is made, so mailbox existence is not checked.

Horizon Pulse's x402 pay per call plan for the email verification API costs $3.00 per 1,000 emails. We check each provider's docs for 6 fields. Horizon Pulse's docs list 3: Address, Deliverability, Company.
We haven't run Horizon Pulse through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
We rank 4,337 plans for email verification APIs by price. Half the plans cost $2.00 or less per 1,000 emails. This plan costs less per 1,000 emails than 37% of the 4,337 plans.
[treg's top-up from $10](https://datacircle.dev/validate-email-apis/treg/top-up-from-10/llms.txt) is the cheapest paid plan 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. [StableEnrich's pay-as-you-go plan](https://datacircle.dev/validate-email-apis/stableenrich/pay-as-you-go-pay-per-request-with-x402-or-mpp-post-api-minerva-validate-emails/llms.txt) costs the least for 10,000 emails a month: $0.05.
[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.
[pingutil](https://datacircle.dev/validate-email-apis/pingutil/free-api-key-post-v1-verify/llms.txt), [Validemail.co](https://datacircle.dev/validate-email-apis/validemail-co/9-90-monthly-9-90-month-get-api-v1-validate/llms.txt) and [looot](https://datacircle.dev/validate-email-apis/looot/top-up/llms.txt) are the best email verification API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-email-apis/horizon-pulse/pay-as-you-go
- [Email validation API: best verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://horizonpulse.dev/x402-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `GET https://horizonpulse.dev/api/email/check`
- API key: not needed
- Its API docs: https://horizonpulse.dev/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing#/paths/~1api~1email~1check
- Sold by: Horizon Pulse (https://horizonpulse.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-09

## In the answer

- Completeness: 50%
- Address: ✓
- Deliverability: ✓
- Company: ✓

## Price

- $ per 1,000 emails: $3.00
- Per: call
- Billing: pay as you go

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Email address check for one address: RFC 5322 syntax, MX records (null MX noted), SPF and DMARC records over DNS, role-account flag (info@, admin@ and similar) and a disposable-domain match. No SMTP connection is made, so mailbox existence is not checked.

## Data

- What it checks: format, mail servers, disposable domains, role addresses
- Keep data: no limit
- Use data: Your use: Results are for your own use, including use inside your own product or agent, where they inform an answer or a decision for your users. No resale: You may not resell, sublicense, redistribute or republish results in bulk, or offer them, or a feed or cache built from them, as a data product or API of your own. No AI training: You may not use results, alone or in bulk, to train, fine-tune or evaluate a machine-learning model, or to build a dataset for that purpose. Using a single result as context for an answer at the time of the call is allowed. No competing service: You may not call our routes systematically to copy, mirror or rebuild a Horizon Pulse route, its methodology or its catalog as a competing service. Public data stays public: These limits apply to Horizon Pulse's analysis, scoring, verdicts and compilation. They do not restrict your use of public-domain government data or third-party content in a result, which stay under their publishers' own terms. Any notices those publishers attach must be kept.

## Plan

- Pay: per call

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email
- Method: GET
- Path: /api/email/check

## About the plan

- Plan: x402 pay per call
- Who can get it: anyone, with no account or API key, paying each call in USDC from a wallet (x402)

## The 25 fields the plan's answer can hold

ok, email, local part, domain, domain in Unicode, syntax valid, syntax standard, accepts mail by DNS, MX records, null MX, SPF present, SPF record, SPF all mechanism, SPF multiple records, DMARC present, DMARC policy, DMARC record, disposable, disposable match, role account, SMTP checked, observed at, source, attribution, disclaimer

## Horizon Pulse's plans (1)

- [Horizon Pulse, pay as you go](https://datacircle.dev/validate-email-apis/horizon-pulse/pay-as-you-go/llms.txt): $3.00 per 1,000, 50% complete

## Horizon Pulse's calls for this API (1)

- `GET /api/email/check`: [Horizon Pulse, pay as you go](https://datacircle.dev/validate-email-apis/horizon-pulse/pay-as-you-go/llms.txt)

## Horizon Pulse's APIs (3)

- [Horizon Pulse: domain WHOIS API pricing, 1 plan](https://datacircle.dev/domain-whois-apis/horizon-pulse/pay-as-you-go/llms.txt)
- [Horizon Pulse: email verification API pricing, 1 plan](https://datacircle.dev/validate-email-apis/horizon-pulse/pay-as-you-go/llms.txt)
- [Horizon Pulse: web scraping API pricing, 1 plan, GET /api/http](https://datacircle.dev/web-scraping-apis/horizon-pulse/pay-as-you-go-x402-pay-per-call-get-api-http/llms.txt)
- [Horizon Pulse: web scraping API pricing, 1 plan, GET /api/extract](https://datacircle.dev/web-scraping-apis/horizon-pulse/pay-as-you-go-x402-pay-per-call-get-api-extract/llms.txt)
- [Horizon Pulse: web scraping API pricing, 1 plan, GET /api/fetch](https://datacircle.dev/web-scraping-apis/horizon-pulse/pay-as-you-go-x402-pay-per-call-get-api-fetch/llms.txt)

## Horizon Pulse: email verification API alternatives

- [Prime Verifier, $15 pack, Pay-As-You-Go 5,000 credits, POST /v1/verify/single](https://datacircle.dev/validate-email-apis/prime-verifier/15-pack-pay-as-you-go-5000-credits-post-v1-verify-single/llms.txt): $3.00 per 1,000, 50% complete
- [DeBounce, top-up from $15, 5K credits, GET /v1/, Single email validation](https://datacircle.dev/validate-email-apis/debounce/top-up-from-15-5k-credits-get-v1/llms.txt): $3.00 per 1,000, 50% complete, live
- [OrbiSearch, $30 pack, Starter, POST /v1/bulk](https://datacircle.dev/validate-email-apis/orbisearch/30-pack-starter-post-v1-bulk/llms.txt): $3.00 per 1,000, 50% complete, live
- [ExactVerify, $15 pack, Pay-As-You-Go from 5,000 emails, GET /v1/single](https://datacircle.dev/validate-email-apis/exactverify/15-pack-pay-as-you-go-from-5000-emails-get-v1-single/llms.txt): $3.00 per 1,000, 33% complete, live
- [BESS x402, pay as you go](https://datacircle.dev/validate-email-apis/bess-x402/pay-as-you-go/llms.txt): $3.00 per 1,000, 33% complete

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-09.

- https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://horizonpulse.dev/.well-known/x402?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://horizonpulse.dev/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://horizonpulse.dev/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://horizonpulse.dev/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://horizonpulse.dev/terms/buyer?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://horizonpulse.dev/x402-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing