# LastDatabase, free, POST /api/integrations/v1/people/unlock: Email finder API

> Unlock one B2B contact through the shared customer allowance.

LastDatabase's Free plan for the email finder API costs $0.00 per 1,000 emails. We check each provider's docs for 10 fields: Verification, Confidence, Catch-all domain, Where found and 6 more. LastDatabase's docs list none of the 10.
We haven't run LastDatabase through [our email finder API benchmark](https://datacircle.dev/best-email-finder-api.txt) yet.
This plan is free. We rank 1,772 plans for email finder APIs by price. Half the plans cost $20.00 or less per 1,000 emails. [See the best free email finder API plan.](https://datacircle.dev/best-email-finder-api.txt)
[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/lastdatabase/free-post-api-integrations-v1-people-unlock
- [Email finder API in 2026: the best of 100+ compared](https://datacircle.dev/best-email-finder-api.txt)
- Get it: https://lastdatabase.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- Request: `POST https://lastdatabase.com/api/integrations/v1/people/unlock`
- API key: with the plan, on https://lastdatabase.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- Its API docs: https://lastdatabase.com/docs/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing#people
- Sold by: LastDatabase (https://lastdatabase.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing)
- Checked: 2026-11-10

## In the answer

- Completeness: 0%

## Price

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

## Aggregators

- Aggregators: none

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Unlock one B2B contact through the shared customer allowance.

## Data

- What it checks: mail servers, disposable domains, mailbox
- Keep data: no limit
- Use data: You may not use LastDatabase services for: Illegal, fraudulent or deceptive activities. Harassment, threats or abusive communications. Unauthorized access to systems or accounts. Violation of applicable privacy or marketing laws. Misrepresentation of identity or affiliation. Abuse or circumvention of API limits or security controls. Unauthorized resale or redistribution of protected platform assets. Activities that materially interfere with our services or infrastructure. Customers are responsible for ensuring that their use of data and services complies with laws and regulations applicable to their activities and jurisdictions.

## Plan

- Pay: $0

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: lead_id
- Method: POST
- Path: /api/integrations/v1/people/unlock

## About the plan

- Plan: Free
- Who can get it: anyone with a verified LastDatabase account

## The only field the plan's answer can hold

email

## LastDatabase's plans (7)

- [LastDatabase, free, POST /api/integrations/v1/people/unlock](https://datacircle.dev/find-email-apis/lastdatabase/free-post-api-integrations-v1-people-unlock/llms.txt): $0.00 per 1,000, 0% complete
- [LastDatabase, free package](https://datacircle.dev/find-email-apis/lastdatabase/free-package/llms.txt): $0.00 per 1,000, 0% complete
- [LastDatabase, $49 monthly](https://datacircle.dev/find-email-apis/lastdatabase/49-monthly/llms.txt): $9.80 per 1,000, 0% complete
- [LastDatabase, $99 monthly](https://datacircle.dev/find-email-apis/lastdatabase/99-monthly/llms.txt): 0% complete
- [LastDatabase, $399 monthly](https://datacircle.dev/find-email-apis/lastdatabase/399-monthly/llms.txt): $7.98 per 1,000, 0% complete
- [LastDatabase, $499 monthly](https://datacircle.dev/find-email-apis/lastdatabase/499-monthly/llms.txt): 0% complete
- [LastDatabase, $999 monthly](https://datacircle.dev/find-email-apis/lastdatabase/999-monthly/llms.txt): $1.998 per 1,000, 0% complete

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

- `POST /api/integrations/v1/people/unlock`: [LastDatabase, free, POST /api/integrations/v1/people/unlock](https://datacircle.dev/find-email-apis/lastdatabase/free-post-api-integrations-v1-people-unlock/llms.txt)

## LastDatabase's APIs (4)

- [LastDatabase: email verification API pricing, 3 plans](https://datacircle.dev/validate-email-apis/lastdatabase/free/llms.txt)
- [LastDatabase: email finder API pricing, 7 plans](https://datacircle.dev/find-email-apis/lastdatabase/free-post-api-integrations-v1-people-unlock/llms.txt)
- [LastDatabase: phone validation API pricing, 3 plans](https://datacircle.dev/validate-phone-apis/lastdatabase/free/llms.txt)
- [LastDatabase: people search API pricing, 3 plans, GET /api/leads/search](https://datacircle.dev/people-search-apis/lastdatabase/free-get-api-leads-search/llms.txt)
- [LastDatabase: people search API pricing, 3 plans, GET /api/integrations/v1/people/search](https://datacircle.dev/people-search-apis/lastdatabase/free/llms.txt)

## LastDatabase: email finder API alternatives

- [EnrichmentAPI, $599 monthly](https://datacircle.dev/find-email-apis/enrichmentapi/599-monthly/llms.txt): $1.997 per 1,000, 0% complete
- [Getle, $99.90 monthly](https://datacircle.dev/find-email-apis/getle/99-90-monthly/llms.txt): $1.998 per 1,000, 0% complete, live
- [EnvoAPI, $1,499 pack, Mega top-up, GET /v1/profiles/contact/by-url](https://datacircle.dev/find-email-apis/envoapi/1499-pack-mega-top-up-get-v1-profiles-contact-by-url/llms.txt): $1.999 per 1,000, 0% complete, live
- [DiscoLike, $3,830 yearly, Team (annual), POST /email/find/batch](https://datacircle.dev/find-email-apis/discolike/3830-yearly-team-annual-post-email-find-batch/llms.txt): $1.9998 per 1,000, 30% 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 2026-11-10.

- https://lastdatabase.com/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://lastdatabase.com/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://lastdatabase.com/docs/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://lastdatabase.com/docs/mcp?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://lastdatabase.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://lastdatabase.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing