1Lookup, POST /reverse-email-append: 9 reverse email lookup API plans

1Lookup's site llms.txt

8% complete: 1 of the 13 key fieldsSee which

$49.50per 1,000 peopleThe median plan costs $10.80 per 1,000. This plan costs less than 13% of the 199 priced plans.

Plan: Starter one of 1Lookup's 9 plans

Call: POST /reverse-email-append one of 1Lookup's 2 calls

About this item

Freshness. 1Lookup doesn't say how fresh a person's profile is.
1 of the 13 key fields. Location.
A monthly subscription. You pay $99 for 20,000 credits, enough for 2,000 calls. Unused credits roll over for up to 3 months.
One call. You send email to POST /reverse-email-append. The call returns the person behind the email.
Who can get it: anyone with a business name and a working business email address. Keep data: with conditions. Use data: with conditions.

Compare with similar plans

Other providers' plans with the closest prices per 1,000.

	This plan1Lookup, $99 monthly, Starter, POST /reverse-email-append	Findymail, $49 monthly	CompanyEnrich, $49 monthly	FullEnrich, $499 monthly	Limadata, $100 monthly
$ per 1,000	$49.50	$49.00	$49.00	$49.90	$50.00
Completeness	8%	54%	31%	62%	0%
Billing	monthly	monthly	monthly	monthly	monthly
Pay	$99	$49	$49	$499	$100
Enough for	2,000 calls a month	1,000 calls a month	1,000 calls a month	10,000 results a month	2,000 calls a month
Freshness	not published	not published	stored	live	not published
Who can get it	anyone with a business name and a working business email address	anyone 18 or over	anyone of legal age	companies, not a covered person or a resident of a country of concern under the US DOJ rule	anyone

Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-20.

Product details

The key fields this plan's answer can hold, then each filled column in its row on the sheet.

Experience, not in the answer
Education, not in the answer
Skills, not in the answer
Headline, not in the answer
About, not in the answer
Location
Photo, not in the answer
Followers, not in the answer
Connections, not in the answer
Certifications, not in the answer
Languages, not in the answer
Recommendations, not in the answer
Open to work, not in the answer

Price
$ per 1,000	$49.50
Billing	monthly
$ a month	$99

Aggregators
Aggregators	none

Charges
Repeat free	7 days
Per	call
Also pays for	from the same budget: every other 1Lookup product: one universal credit balance

Not found
$ per 1,000	$0.00

In their words
Their pitch	Identity enrichment from an email address.

Data
Keep data	your subscription term: Output Data may not be retained after the subscription terminates, except as required by law
Use data	we grant you a limited, non-exclusive, non-transferable, non-sublicensable, revocable license to access and use the Service, and to use Output Data, for your internal business purposes during your subscription term, You must not, and must not permit any third party to: Resell, sublicense, rent, lease, distribute, or otherwise make the Service or Output Data available to any third party, except as expressly permitted in writing by us, Build, populate, enrich, or maintain a competing or substitute database, list, or product from Output Data, or use Output Data to train any machine learning or artificial intelligence model, Copy, scrape, cache, or store Output Data beyond what is reasonably necessary for your internal business use, or retain Output Data after your subscription terminates except as required by law, Reverse engineer, decompile, or disassemble any part of the Service, or attempt to discover its source code, underlying data sources, algorithms, or scoring logic, Circumvent or attempt to circumvent any rate limit, quota, usage limit, authentication, or access control, Remove, obscure, or alter any proprietary notice, or misrepresent the source of Output Data, Use the Service to benchmark against a competing product, or publish performance or accuracy comparisons, without our prior written consent, Access the Service by any automated means other than our documented APIs, or use the Service in a manner that interferes with its integrity, security, or performance [...] You must not use the Service, or Output Data, to: Violate any applicable law, regulation, or third-party right, Send, or enable others to send, unlawful telemarketing, robocalls, spam, or unsolicited or non-consented calls, texts, faxes, or emails, Harass, stalk, threaten, defraud, extort, dox, discriminate against, or harm any person, or facilitate any of the foregoing, Determine any person's eligibility for credit, insurance, employment, housing, government benefits, or any other purpose governed by the Fair Credit Reporting Act, as further described in Section 9, Identify, locate, surveil, or track any individual without a lawful basis, or to skip-trace or investigate any individual in violation of law, Collect, compile, enrich, sell, or license personal data without a lawful basis and required consents, Build, train, or improve a competing product, dataset, list, or machine learning or artificial intelligence model, Resell, redistribute, or provide the Service or Output Data to third parties [...]

Plan
Pay	$99
You get	20,000 credits a month
Enough for	2,000 calls a month
Expires	unused credits roll over for up to 3 months

Rate limit
Batch	1

Speed
Answer	in the call

The call
You send	email
Method	POST
Path	/reverse-email-append

About the plan
Plan	Starter
Who can get it	anyone with a business name and a working business email address

The 30 fields the plan's answer can hold

success, request ID, request type, input, credits used, credits remaining, cache hit, matched, email, first name, last name, full name, address, address line 1, city, state, ZIP code, country, phone, phone DNC, cell, cell DNC, phones, company name, company job title, company industry, company LinkedIn URL, company website, company country, lookup type