# ApiOne, free: Email finder API

> Send a first name, last name and company domain and get the most likely work email with its deliverability.

ApiOne's email finder API on its Free plan. It costs $0.00 per 1,000 emails. ApiOne's docs list 2 of the 10 fields on our checklist: Verification, Catch-all domain.
We haven't run ApiOne through [our email finder API benchmark](https://datacircle.dev/best-email-finder-api.txt) yet.
This plan is free. We rank 1,630 plans for email finder APIs by price. Half the plans cost $20.00 per 1,000 emails or less. [See how many email finder API plans are free.](https://datacircle.dev/best-email-finder-api.txt)
[ClearBounce's $3.20 monthly plan](https://datacircle.dev/find-email-apis/clearbounce/3-20-monthly/llms.txt) costs the least per 1,000 emails. ClearBounce's $3.20 monthly plan charges nothing per call. You get as many emails as ClearBounce's rate limit allows.
[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 more up front than ClearBounce's $3.20 monthly plan.
[DiscoLike](https://datacircle.dev/find-email-apis/discolike/399-monthly-team-post-email-find/llms.txt), [GetProspect](https://datacircle.dev/find-email-apis/getprospect/399-monthly-growth-50k-post-v2-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/apione/free
- [Email finder API: the best of 90+ providers compared](https://datacircle.dev/best-email-finder-api.txt)
- Get it: https://apione.store/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing#pricing
- Request: `POST https://api.apione.store/api/v1/emails/find`
- API key: with the plan, on https://apione.store/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing#pricing
- Its API docs: https://apione.store/endpoints/email-finder?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- Sold by: ApiOne (https://apione.store?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing)
- Checked: 2026-11-07

## In the answer

- Completeness: 20%
- Verification: ✓
- Catch-all domain: ✓

## Price

- $ per 1,000 emails: $0.00
- Per: call
- Billing: free

## Aggregators

- Aggregators: none

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Send a first name, last name and company domain and get the most likely work email with its deliverability.

## Data

- Keep data: no limit
- Use data: Permitted use: Enriching company records in your CRM, sales tools, or internal databases. Finding and verifying professional email addresses for legitimate business outreach. Detecting the technology stack of companies you are targeting for sales or partnership. Identifying hiring and growth signals to prioritise outreach. Building internal sales, recruiting, or GTM tools for your organisation. Integrating ApiOne data into your own SaaS product to enrich your customers' records. Academic or market research using aggregated, anonymised outputs. Prohibited use: Reselling raw data: You may not resell, license, or distribute raw API responses as a standalone data product or data feed to third parties. Competitive use: You may not use ApiOne to build a competing B2B data enrichment API or data provider service. Reverse engineering: You may not attempt to extract, reverse-engineer, or reconstruct our underlying data sources or AI models. Spam: You may not use email addresses returned by ApiOne for bulk unsolicited spam campaigns. All outreach must comply with CAN-SPAM, GDPR, and applicable local law. Illegal targeting: You may not use ApiOne to identify, profile, or contact individuals for discriminatory, harassing, or unlawful purposes. Key sharing: You may not share your API key with users or organisations outside your company. Automation abuse: You may not use automated scripts to deliberately exceed your plan's rate limits or probe system limits. Account circumvention: You may not register multiple free accounts to bypass credit limits.

## Plan

- Pay: $0
- You get: 100 credits a month
- Enough for: about 33 calls a month
- Expires: reset monthly, credits cannot be accumulated

## Rate limit

- Per second: 0.5
- Concurrent: 1
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: first_name, last_name, domain. Optional: full_name
- Method: POST
- Path: /emails/find

## About the plan

- Plan: Free
- Who can get it: anyone

## The 5 fields the plan's answer can hold

email, verified, deliverability, catch-all, alternatives

## ApiOne's plans (4)

- [ApiOne, free](https://datacircle.dev/find-email-apis/apione/free/llms.txt): $0.00 per 1,000, 20% complete
- [ApiOne, $49 monthly](https://datacircle.dev/find-email-apis/apione/49-monthly/llms.txt): $29.40 per 1,000, 20% complete
- [ApiOne, $149 monthly](https://datacircle.dev/find-email-apis/apione/149-monthly/llms.txt): $17.88 per 1,000, 20% complete
- [ApiOne, $499 monthly](https://datacircle.dev/find-email-apis/apione/499-monthly/llms.txt): $14.97 per 1,000, 20% complete

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

- `POST /emails/find`: [ApiOne, free](https://datacircle.dev/find-email-apis/apione/free/llms.txt)

## ApiOne's APIs (8)

- [ApiOne: company discovery API pricing, 4 plans](https://datacircle.dev/company-discovery-apis/apione/free/llms.txt)
- [ApiOne: company enrichment API pricing, 4 plans](https://datacircle.dev/company-enrichment-apis/apione/free/llms.txt)
- [ApiOne: company open jobs API pricing, 4 plans](https://datacircle.dev/company-open-job-apis/apione/free/llms.txt)
- [ApiOne: tech stack API pricing, 4 plans](https://datacircle.dev/company-technology-apis/apione/free/llms.txt)
- [ApiOne: email verification API pricing, 4 plans](https://datacircle.dev/validate-email-apis/apione/free/llms.txt)
- [ApiOne: email finder API pricing, 4 plans](https://datacircle.dev/find-email-apis/apione/free/llms.txt)
- [ApiOne: people search API pricing, 4 plans](https://datacircle.dev/people-search-apis/apione/free/llms.txt)
- [ApiOne: people enrichment API pricing, 4 plans](https://datacircle.dev/person-enrichment-apis/apione/free/llms.txt)

## ApiOne: email finder API alternatives

- [AeroLeads, $299 pack, Cruise, GET /api/get_linkedin_details](https://datacircle.dev/find-email-apis/aeroleads/299-pack-cruise-get-api-get-linkedin-details/llms.txt): $14.95 per 1,000, 40% complete, stored
- [Suprsonic, $599 monthly](https://datacircle.dev/find-email-apis/suprsonic/599-monthly/llms.txt): $14.975 per 1,000, 40% complete
- [EmailVerify.io, $1,499 pack](https://datacircle.dev/find-email-apis/emailverify-io/1499-pack/llms.txt): $14.99 per 1,000, 10% complete, live
- [Sealch, $15 pack](https://datacircle.dev/find-email-apis/sealch/15-pack/llms.txt): $15.00 per 1,000, 20% 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 2026-11-07.

- https://apione.store?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://apione.store/acceptable-use?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://apione.store/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://apione.store/endpoints/email-finder?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://apione.store/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://apione.store/mcp?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://apione.store/refund?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://apione.store/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing