# The Data Group, free: Email finder API

> Append email addresses to your existing contact records

The Data Group's email finder API on its Free test plan. It costs $0.00 per 1,000 emails. It returns none of the 10 key fields we check: Verification, Confidence, Catch-all domain, Where found and 6 more.
We haven't run The Data Group through [our email finder API benchmark](https://datacircle.dev/best-email-finder-api.txt) yet.
This plan is free. We rank 1,491 plans for email finder APIs by price. Half the plans cost $20.00 per 1,000 emails or less.
[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: as little as $0.00074. ClearBounce's $3.20 monthly plan covers up to 4,320,000 emails a month at no extra cost.
[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 our benchmark.

- This page: https://datacircle.dev/find-email-apis/the-data-group/free
- [Email finder API: 80+ providers compared on price and data](https://datacircle.dev/best-email-finder-api.txt)
- Get it: https://thedatagroup.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- Request: `POST https://testapi.tdg1.io/v3/append/email`
- API key: with the plan, on https://thedatagroup.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- Its API docs: https://thedatagroup.com/api/email-append-api-documentation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- Sold by: The Data Group (https://thedatagroup.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing)
- Checked: 2026-11-04

## In the answer

- Completeness: 0%

## Price

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

## Aggregators

- Aggregators: none

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Append email addresses to your existing contact records

## Data

- Freshness: 1 day
- Countries: United States
- Keep data: "All Data provided under this Agreement is only available for Licensee’s one-time use." [...] "Licensee shall not make or cause to make any copies of the Data for any reason." [...] On termination or expiration: "Licensee shall not retain any portion of the Data and shall discontinue all use of the Data and, within thirty (30) days, erase, purge, destroy and/or return to Data Group any and all Data"
- Use data: "Licensee agrees that it shall use the Data only for its own internal and lawful direct marketing purposes." [...] "Licensee shall not provide the Data, in whole or in part, nor shall it provide any subset of the Data, to any third party as a stand-alone product, file or database." [...] "Licensee is prohibited from reselling, sublicensing, or otherwise providing the Data to any third-party." [...] "Licensee shall not use any Data as a factor in determining a consumer’s credit qualifications for (a) credit or insurance used primarily for personal, family or household purposes, (b) employment purposes, or (c) other purposes set forth in Section 604 of the FCRA" [...] "Licensee shall not use the Data as part of an application that provides name or phone number lookups to companies providing live-operator directory assistance services."

## Plan

- Pay: $0
- You get: 100 requests
- Enough for: 100 calls

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: FName, LName, Address1, Zip
- Method: POST
- Path: /append/email

## About the plan

- Plan: Free test
- Who can get it: anyone

## The 2 fields the plan's answer can hold

email, trace ID

## The Data Group's plans (3)

- [The Data Group, free](https://datacircle.dev/find-email-apis/the-data-group/free/llms.txt): $0.00 per 1,000, 0% complete, 1 day
- [The Data Group, contact us, Enterprise](https://datacircle.dev/find-email-apis/the-data-group/contact-us-enterprise/llms.txt): 0% complete, 1 day
- [The Data Group, contact us, Pay per lookup](https://datacircle.dev/find-email-apis/the-data-group/contact-us-pay-per-lookup/llms.txt): $20.00 per 1,000, 0% complete, 1 day

## The Data Group's calls for this API (1)

- `POST /append/email`: [The Data Group, free](https://datacircle.dev/find-email-apis/the-data-group/free/llms.txt)

## The Data Group's APIs (6)

- [The Data Group: email verification API pricing, 2 plans](https://datacircle.dev/validate-email-apis/the-data-group/free/llms.txt)
- [The Data Group: email finder API pricing, 3 plans](https://datacircle.dev/find-email-apis/the-data-group/free/llms.txt)
- [The Data Group: phone finder API pricing, 3 plans](https://datacircle.dev/find-phone-apis/the-data-group/free/llms.txt)
- [The Data Group: phone validation API pricing, 3 plans](https://datacircle.dev/validate-phone-apis/the-data-group/free/llms.txt)
- [The Data Group: reverse email lookup API pricing, 3 plans](https://datacircle.dev/reverse-email-lookup-apis/the-data-group/free/llms.txt)
- [The Data Group: people enrichment API pricing, 3 plans, POST /append/demographic](https://datacircle.dev/person-enrichment-apis/the-data-group/free-test-post-append-demographic/llms.txt)
- [The Data Group: people enrichment API pricing, 3 plans, POST /lookup/phone](https://datacircle.dev/person-enrichment-apis/the-data-group/free-test-post-lookup-phone/llms.txt)

## The Data Group: email finder API alternatives

- [Fiber AI, $300 monthly, Prospector, POST /v1/contact-details/basic-work-email](https://datacircle.dev/find-email-apis/fiber-ai/300-monthly-prospector-post-v1-contact-details-basic-work-email/llms.txt): $20.00 per 1,000, 30% complete, live
- [Generect, top-up from $20, Pay as you go, POST /api/v1/email/find/](https://datacircle.dev/find-email-apis/generect/top-up-from-20-pay-as-you-go-post-api-v1-email-find/llms.txt): $20.00 per 1,000, 30% complete, live
- [Gamalogic, $200 pack](https://datacircle.dev/find-email-apis/gamalogic/200-pack/llms.txt): $20.00 per 1,000, 10% complete, live
- [Reverse Contact, $4,000 pack](https://datacircle.dev/find-email-apis/reverse-contact/4000-pack/llms.txt): $20.00 per 1,000, 10% 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 2026-11-04.

- https://thedatagroup.com/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://thedatagroup.com/api/email-append-api-documentation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://thedatagroup.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing
- https://thedatagroup.com/terms-condition?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-finder-api-pricing