# Accurate Append, free: Reverse email lookup API

> This endpoint combines our most popular options, settings, and data sources for appending party information to phone numbers and/or email addresses into a single, streamlined developer experience.

Accurate Append's reverse email lookup API on its Free Trial Key plan. It costs $0.00 per 1,000 people. It returns 1 of the 13 key fields we check: Location.
We haven't run Accurate Append through [our reverse email lookup API benchmark](https://datacircle.dev/best-reverse-email-lookup-api.txt) yet.
This plan is free. We rank 396 plans for reverse email lookup APIs by price. Half the plans cost $24.875 per 1,000 people or less.
[Minerva's $400 monthly plan](https://datacircle.dev/reverse-email-lookup-apis/minerva/400-monthly/llms.txt) costs the least per 1,000 people. Minerva's reverse email lookup API costs nothing beyond the plan price.
[Village's $25 pack (Reverse Lookup by Email, cached only)](https://datacircle.dev/reverse-email-lookup-apis/village/25-pack-1000-credits-post-v2-people-enrich-by-email-reverse-lookup-by-email-cached-only/llms.txt) covers any number of people. Village's $25 pack costs less up front than Minerva's $400 monthly plan.
[GetProspect](https://datacircle.dev/reverse-email-lookup-apis/getprospect/399-monthly-growth-50k-post-v2-people-enrich/llms.txt), [Village](https://datacircle.dev/reverse-email-lookup-apis/village/1-monthly/llms.txt) and [treg](https://datacircle.dev/reverse-email-lookup-apis/treg/top-up-from-200/llms.txt) are the best reverse email lookup API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/reverse-email-lookup-apis/accurate-append/free
- [Reverse email lookup API: 30+ providers compared](https://datacircle.dev/best-reverse-email-lookup-api.txt)
- Get it: https://accurateappend.com/pricing-beta/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- Request: `GET https://api.accurateappend.com/Services/V2/ReverseUnified/{licensekey}/`
- API key: with the plan, on https://accurateappend.com/pricing-beta/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- Its API docs: https://docs.accurateappend.com/reference/unified-reverse?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- Sold by: Accurate Append (https://accurateappend.com/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing)
- Checked: 2026-11-02

## In the answer

- Completeness: 8%
- Location: ✓

## Price

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

## Aggregators

- Aggregators: none

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: This endpoint combines our most popular options, settings, and data sources for appending party information to phone numbers and/or email addresses into a single, streamlined developer experience.

## Data

- Keep data: no limit
- Use data: You are prohibited from using the information you learn from search results (1) to discriminate against any consumer, (2) for the purpose of considering a consumer’s eligibility for personal credit or insurance, employment, housing, or a government license or benefit, or (3) otherwise to affect a consumer’s economic or financial status or standing.

## Plan

- Pay: $0
- You get: 500 requests
- Enough for: 500 calls
- Expires: 30 days

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: emailaddress, phoneNumber or both, Content-Type header "application/json". Optional: firstname, lastname, source
- Method: GET
- Path: /ReverseUnified/{licensekey}/

## About the plan

- Plan: Free Trial Key
- Who can get it: anyone, no credit card required

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

host, request date, request IP, transaction ID, phone number in, email address in, first name in, last name in, first name, last name, house number, street name, address, city, state, postal code

## Accurate Append's plans (10)

- [Accurate Append, free](https://datacircle.dev/reverse-email-lookup-apis/accurate-append/free/llms.txt): $0.00 per 1,000, 8% complete
- [Accurate Append, contact us, Annual subscription](https://datacircle.dev/reverse-email-lookup-apis/accurate-append/contact-us-annual-subscription/llms.txt): 8% complete
- [Accurate Append, contact us, Estimated matches > 2000000](https://datacircle.dev/reverse-email-lookup-apis/accurate-append/contact-us-estimated-matches-2000000/llms.txt): $40.00 per 1,000, 8% complete
- [Accurate Append, contact us, Estimated matches 1000000](https://datacircle.dev/reverse-email-lookup-apis/accurate-append/contact-us-estimated-matches-1000000/llms.txt): $50.00 per 1,000, 8% complete
- [Accurate Append, contact us, Estimated matches 500000](https://datacircle.dev/reverse-email-lookup-apis/accurate-append/contact-us-estimated-matches-500000/llms.txt): $60.00 per 1,000, 8% complete
- [Accurate Append, contact us, Estimated matches 250000](https://datacircle.dev/reverse-email-lookup-apis/accurate-append/contact-us-estimated-matches-250000/llms.txt): $70.00 per 1,000, 8% complete
- [Accurate Append, contact us, Estimated matches 100000](https://datacircle.dev/reverse-email-lookup-apis/accurate-append/contact-us-estimated-matches-100000/llms.txt): $80.00 per 1,000, 8% complete
- [Accurate Append, contact us, Estimated matches 50000](https://datacircle.dev/reverse-email-lookup-apis/accurate-append/contact-us-estimated-matches-50000/llms.txt): $90.00 per 1,000, 8% complete
- [Accurate Append, contact us, Estimated matches 25000](https://datacircle.dev/reverse-email-lookup-apis/accurate-append/contact-us-estimated-matches-25000/llms.txt): $100.00 per 1,000, 8% complete
- [Accurate Append, contact us, Estimated matches < 25000](https://datacircle.dev/reverse-email-lookup-apis/accurate-append/contact-us-estimated-matches-25000-2/llms.txt): $110.00 per 1,000, 8% complete

## Accurate Append's calls for this API (1)

- `GET /ReverseUnified/{licensekey}/`: [Accurate Append, free](https://datacircle.dev/reverse-email-lookup-apis/accurate-append/free/llms.txt)

## Accurate Append's APIs (3)

- [Accurate Append: email verification API pricing, 2 plans](https://datacircle.dev/validate-email-apis/accurate-append/free/llms.txt)
- [Accurate Append: phone validation API pricing, 2 plans](https://datacircle.dev/validate-phone-apis/accurate-append/free/llms.txt)
- [Accurate Append: reverse email lookup API pricing, 10 plans](https://datacircle.dev/reverse-email-lookup-apis/accurate-append/free/llms.txt)

## Accurate Append: reverse email lookup API alternatives

- [Village, $100 pack, 5,000 credits, POST /v2/people/enrich/by-email, Reverse Lookup by Email](https://datacircle.dev/reverse-email-lookup-apis/village/100-pack-5000-credits-post-v2-people-enrich-by-email-reverse-lookup-by-email/llms.txt): $40.00 per 1,000, 31% complete, stored
- [Fiber AI, $300 monthly, Prospector, POST /v1/email-to-person/single](https://datacircle.dev/reverse-email-lookup-apis/fiber-ai/300-monthly-prospector-post-v1-email-to-person-single/llms.txt): $40.00 per 1,000, 92% complete, stored
- [Context.dev, $20 monthly](https://datacircle.dev/reverse-email-lookup-apis/context-dev/20-monthly/llms.txt): $40.00 per 1,000, 46% complete, stored
- [EnrichLoops, $100 monthly](https://datacircle.dev/reverse-email-lookup-apis/enrichloops/100-monthly/llms.txt): $40.00 per 1,000, 54% complete, 30 days

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-02.

- https://accurateappend.com/fair-credit-reporting-act-statement/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://accurateappend.com/pricing-beta/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://accurateappend.com/terms-of-use/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://docs.accurateappend.com/docs/appending-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://docs.accurateappend.com/docs/mcp-overview?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://docs.accurateappend.com/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://docs.accurateappend.com/reference/unified-reverse?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing