# OnchainCheck, pay as you go: Email finder API

> Finds a person's likely work email from their name and company domain. Checks the domain's mail servers, reads the company's homepage and contact pages for addresses it publishes to learn its pattern (jane.doe, jdoe, jane), and ranks candidates with a confidence each. An exact address found on the site comes first. No SMTP probe.

OnchainCheck's x402 pay per call plan for the email finder API costs $5.00 per 1,000 emails. We check each provider's docs for 10 fields. OnchainCheck's docs list 3: Confidence, Name, Company.
We haven't run OnchainCheck through [our email finder API benchmark](https://datacircle.dev/best-email-finder-api.txt) yet.
We rank 1,748 plans for email finder APIs by price. Half the plans cost $20.00 or less per 1,000 emails. This plan costs less per 1,000 emails than 85% of the 1,748 plans.
[Lakewave's $19 monthly plan](https://datacircle.dev/find-email-apis/lakewave/19-monthly/llms.txt) costs the least per 1,000 emails. Lakewave's email finder API costs nothing beyond the plan price. [StableEnrich's pay-as-you-go plan](https://datacircle.dev/find-email-apis/stableenrich/pay-as-you-go-pay-per-request-with-x402-or-mpp-post-api-minerva-enrich/llms.txt) costs the least for 10,000 emails a month: $1.00.
[ClearBounce's $4 pack](https://datacircle.dev/find-email-apis/clearbounce/4-pack/llms.txt) covers any number of emails. ClearBounce's $4 pack costs less up front than Lakewave's $19 monthly plan.
[GetProspect](https://datacircle.dev/find-email-apis/getprospect/399-monthly-growth-50k-post-v2-email-find/llms.txt), [DiscoLike](https://datacircle.dev/find-email-apis/discolike/399-monthly-team-post-email-find/llms.txt) and [Icypeas](https://datacircle.dev/find-email-apis/icypeas/499-monthly-hypergrowth-100000-credits-a-month-post-email-search/llms.txt) are the best email finder API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/find-email-apis/onchaincheck/pay-as-you-go
- [Email finder API: the best of 100+ providers compared](https://datacircle.dev/best-email-finder-api.txt)
- Get it: https://onchaincheck.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- Request: `GET https://onchaincheck.dev/email/find`
- API key: not needed
- Its API docs: https://onchaincheck.dev/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing#/paths/~1email~1find
- Sold by: OnchainCheck (https://onchaincheck.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing)
- Checked: 2026-11-09

## In the answer

- Completeness: 30%
- Confidence: ✓
- Name: ✓
- Company: ✓

## Price

- $ per 1,000 emails: $5.00
- Per: call
- Billing: pay as you go

## Strengths

- Strengths: under $10 per 1,000, found live, nothing charged when not found

## Aggregators

- Aggregators: none

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Finds a person's likely work email from their name and company domain. Checks the domain's mail servers, reads the company's homepage and contact pages for addresses it publishes to learn its pattern (jane.doe, jdoe, jane), and ranks candidates with a confidence each. An exact address found on the site comes first. No SMTP probe.

## Data

- Freshness: live
- What it checks: mail servers
- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: per call

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: name, domain
- Method: GET
- Path: /email/find

## About the plan

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

## The 16 fields the plan's answer can hold

name, domain, first name, last name, best guess, confidence, candidate email, candidate pattern, candidate confidence, published on site, published emails, personal addresses seen, pages read, mail provider, checked at, note

## OnchainCheck's plans (1)

- [OnchainCheck, pay as you go](https://datacircle.dev/find-email-apis/onchaincheck/pay-as-you-go/llms.txt): $5.00 per 1,000, 30% complete, live

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

- `GET /email/find`: [OnchainCheck, pay as you go](https://datacircle.dev/find-email-apis/onchaincheck/pay-as-you-go/llms.txt)

## OnchainCheck's APIs (8)

- [OnchainCheck: company open jobs API pricing, 1 plan](https://datacircle.dev/company-open-job-apis/onchaincheck/pay-as-you-go/llms.txt)
- [OnchainCheck: tech stack API pricing, 1 plan](https://datacircle.dev/company-technology-apis/onchaincheck/pay-as-you-go/llms.txt)
- [OnchainCheck: domain WHOIS API pricing, 1 plan](https://datacircle.dev/domain-whois-apis/onchaincheck/pay-as-you-go/llms.txt)
- [OnchainCheck: email verification API pricing, 1 plan](https://datacircle.dev/validate-email-apis/onchaincheck/pay-as-you-go/llms.txt)
- [OnchainCheck: email finder API pricing, 1 plan](https://datacircle.dev/find-email-apis/onchaincheck/pay-as-you-go/llms.txt)
- [OnchainCheck: web scraping API pricing, 1 plan](https://datacircle.dev/web-scraping-apis/onchaincheck/pay-as-you-go/llms.txt)
- [OnchainCheck: company enrichment API pricing, 1 plan, GET /company/enrich](https://datacircle.dev/company-enrichment-apis/onchaincheck/pay-as-you-go-x402-pay-per-call-get-company-enrich/llms.txt)
- [OnchainCheck: company enrichment API pricing, 1 plan, GET /sec/company](https://datacircle.dev/company-enrichment-apis/onchaincheck/pay-as-you-go-x402-pay-per-call-get-sec-company/llms.txt)
- [OnchainCheck: company enrichment API pricing, 1 plan, GET /vat/validate](https://datacircle.dev/company-enrichment-apis/onchaincheck/pay-as-you-go-x402-pay-per-call-get-vat-validate/llms.txt)
- [OnchainCheck: job postings API pricing, 1 plan, GET /jobs/new](https://datacircle.dev/job-posting-apis/onchaincheck/pay-as-you-go-x402-pay-per-call-get-jobs-new/llms.txt)
- [OnchainCheck: job postings API pricing, 1 plan, GET /jobs/search](https://datacircle.dev/job-posting-apis/onchaincheck/pay-as-you-go-x402-pay-per-call-get-jobs-search/llms.txt)

## OnchainCheck: email finder API alternatives

- [Sealch, $25 monthly](https://datacircle.dev/find-email-apis/sealch/25-monthly/llms.txt): $5.00 per 1,000, 20% complete, live
- [VeriMails, $1,500 yearly, Scale, POST /api/find-email/csv](https://datacircle.dev/find-email-apis/verimails/1500-yearly-scale-post-api-find-email-csv/llms.txt): $5.00 per 1,000, 10% complete, live
- [Rafal Sav on Apify, $19 monthly](https://datacircle.dev/find-email-apis/rafal-sav-on-apify/19-monthly/llms.txt): $5.00 per 1,000, 40% complete, live
- [Kitt AI, top-up, Pay As You Go, first 1M found emails a month](https://datacircle.dev/find-email-apis/kitt-ai/top-up-pay-as-you-go-first-1m-found-emails-a-month/llms.txt): $5.00 per 1,000, 0% complete, live

## 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-finder-api-pricing
- https://onchaincheck.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://onchaincheck.dev/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing