# The Data Group, free test, POST /append/demographic: People enrichment API

> Append lifestyle and financial attributes to your contact records. This demographic appending service utilizes deterministic matching against our master identity graph.

The Data Group's people enrichment API on its Free test plan. It costs $0.00 per 1,000 people. It returns 1 of the 13 key fields we check: Education.
We haven't run The Data Group through [our people enrichment API benchmark](https://datacircle.dev/best-people-enrichment-api.txt) yet.
This plan is free. We rank 191 plans for people enrichment APIs by price. Half the plans cost $10.00 per 1,000 people or less.
[Coldlytics's $49 monthly plan](https://datacircle.dev/person-enrichment-apis/coldlytics/49-monthly/llms.txt) is the cheapest paid plan per 1,000 people: as little as $0.0095. Coldlytics's $49 monthly plan covers up to 5,184,000 people a month at no extra cost.
[GetProspect's $49 monthly plan (/v2/people/{id})](https://datacircle.dev/person-enrichment-apis/getprospect/49-monthly-starter-get-v2-people-id/llms.txt) covers any number of people. GetProspect's $49 monthly plan costs as much up front as Coldlytics's $49 monthly plan.
[Context.dev](https://datacircle.dev/person-enrichment-apis/context-dev/500-monthly/llms.txt), [Reverse Contact](https://datacircle.dev/person-enrichment-apis/reverse-contact/500-pack/llms.txt) and [Autobound](https://datacircle.dev/person-enrichment-apis/autobound/149-pack/llms.txt) are the best people enrichment API providers in our benchmark.

- This page: https://datacircle.dev/person-enrichment-apis/the-data-group/free-test-post-append-demographic
- [People enrichment API: 6 providers compared](https://datacircle.dev/best-people-enrichment-api.txt)
- Get it: https://thedatagroup.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=people-enrichment-api-pricing
- Request: `POST https://api.tdg1.io/v2/append/demographic`
- API key: with the plan, on https://thedatagroup.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=people-enrichment-api-pricing
- Its API docs: https://thedatagroup.com/api/demographic-append-api-documentation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=people-enrichment-api-pricing
- Sold by: The Data Group (https://thedatagroup.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=people-enrichment-api-pricing)
- Checked: 2026-11-04

## In the answer

- Completeness: 8%
- Education: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Append lifestyle and financial attributes to your contact records. This demographic appending service utilizes deterministic matching against our master identity graph.

## 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, Phone, Email. Optional: City, State
- Method: POST
- Path: /append/demographic

## About the plan

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

## The 43 fields the plan's answer can hold

gender, age, date of birth, LOR, homeowner, EHI, dwelling type, married, median year built, mobile home, pool, fireplace, single parent, HHNBRSR, credit card, wealth score, charity donor, market home value, education, ethnicity, child code, child age code, child number code, luxury vehicle, SUV, truck, percent Black, percent White, percent Hispanic, percent Asian, percent English speaking, percent Spanish speaking, percent Asian speaking, percent single-family dwellings, percent multi-family dwellings, MHV, MOR, percent auto, median school, percent white collar, percent blue collar, percent other occupations, demographic level

## The Data Group's plans (3)

- [The Data Group, free test, POST /append/demographic](https://datacircle.dev/person-enrichment-apis/the-data-group/free-test-post-append-demographic/llms.txt): $0.00 per 1,000, 8% complete, 1 day
- [The Data Group, contact us, Enterprise, POST /append/demographic](https://datacircle.dev/person-enrichment-apis/the-data-group/contact-us-enterprise-post-append-demographic/llms.txt): 8% complete, 1 day
- [The Data Group, contact us, Pay per lookup, POST /append/demographic](https://datacircle.dev/person-enrichment-apis/the-data-group/contact-us-pay-per-lookup-post-append-demographic/llms.txt): $20.00 per 1,000, 8% complete, 1 day

## The Data Group's calls for this API (2)

- `POST /append/demographic`: [The Data Group, free test, POST /append/demographic](https://datacircle.dev/person-enrichment-apis/the-data-group/free-test-post-append-demographic/llms.txt)
- `POST /lookup/phone`: [The Data Group, free test, POST /lookup/phone](https://datacircle.dev/person-enrichment-apis/the-data-group/free-test-post-lookup-phone/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 alternatives

- [Sumble, $99 monthly, Pro, POST /v9/people, People](https://datacircle.dev/person-enrichment-apis/sumble/99-monthly-pro-post-v9-people-people/llms.txt): $10.00 per 1,000, 23% complete, 1 day
- [NeuralVerge, $50 monthly, Base, POST /functions/v1/run-phone-enrichment](https://datacircle.dev/person-enrichment-apis/neuralverge/50-monthly-base-post-functions-v1-run-phone-enrichment/llms.txt): $20.00 per 1,000, 8% complete, live
- [CUFinder, $2,499 yearly](https://datacircle.dev/person-enrichment-apis/cufinder/2499-yearly/llms.txt): $20.825 per 1,000, 69% complete, 1 day
- [NinjaPear, $22,788 yearly](https://datacircle.dev/person-enrichment-apis/ninjapear/22788-yearly/llms.txt): $23.143 per 1,000, 46% 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=people-enrichment-api-pricing
- https://thedatagroup.com/api/demographic-append-api-documentation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=people-enrichment-api-pricing
- https://thedatagroup.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=people-enrichment-api-pricing
- https://thedatagroup.com/terms-condition?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=people-enrichment-api-pricing