# Opsis, top-up from $20: Reverse email lookup API

> Build email, username and domain search into your website, power an external tool, or integrate public-source intelligence into your investigation workflow.

Opsis's reverse email lookup API on its API credits plan. It costs $400.00 per 1,000 people. It returns 3 of the 13 key fields we check: About, Location, Photo.
We haven't run Opsis through [our reverse email lookup API benchmark](https://datacircle.dev/best-reverse-email-lookup-api.txt) yet.
Half of the 395 plans we rank by price cost $25.00 per 1,000 people or less. This plan costs less per 1,000 people than 5% of the 395 plans.
[Village's $1 monthly plan](https://datacircle.dev/reverse-email-lookup-apis/village/1-monthly-core-post-v2-people-enrich-by-email-reverse-lookup-by-email-cached-only/llms.txt) costs the least per 1,000 people: as little as $0.0000039. Village's $1 monthly plan covers up to 259,200,000 people a month at no extra cost.
[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 more up front than Village's $1 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 our benchmark.

- This page: https://datacircle.dev/reverse-email-lookup-apis/opsis/top-up-from-20
- [Reverse email lookup API: 20+ providers compared](https://datacircle.dev/best-reverse-email-lookup-api.txt)
- Get it: https://useopsis.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- Request: `POST https://api.useopsis.com/v1/searches`
- API key: with the plan, on https://useopsis.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- Its API docs: https://useopsis.com/docs/api/create-search?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- Sold by: Opsis (https://useopsis.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing)
- Checked: 2026-11-04

## In the answer

- Completeness: 23%
- About: ✓
- Location: ✓
- Photo: ✓

## Price

- $ per 1,000 people: $400.00
- Per: call
- Billing: pay first

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Username search · Domain search

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $400.00

## In their words

- Their pitch: Build email, username and domain search into your website, power an external tool, or integrate public-source intelligence into your investigation workflow.

## Data

- Freshness: live
- Keep data: no limit
- Use data: 4. Regulated-Use Disclaimers: [...] You may not use the Service, in whole or in part, for: Determining eligibility for employment, promotion, reassignment, or retention, Evaluating a consumer for credit, insurance, or other personal-finance decisions, Tenant screening or housing decisions, Accessing or obtaining motor-vehicle records in a manner regulated by the DPPA, Accessing or inferring non-public personal financial information regulated by GLBA, Eligibility for any license, benefit, or government-issued authorization, Any purpose governed by the FCRA, GLBA, DPPA, HIPAA, or equivalent state or foreign laws [...] 5. Acceptable Use Policy: You may only use the Service for lawful purposes. [...] Prohibited uses include: Stalking, harassment, intimidation, or threatening any individual, Doxxing or publishing private information with intent to harm, Discrimination based on race, gender, religion, sexual orientation, or any protected characteristic, Employment screening, tenant screening, credit decisions, or any FCRA-regulated purpose, Any activity that violates applicable local, state, national, or international law, Violations of the Computer Fraud and Abuse Act (CFAA) or equivalent legislation, Circumventing rate limits, scraping the Service, or automated bulk data extraction, Reselling, redistributing, or commercially sublicensing search results, Using the Service to facilitate identity theft or fraud [...] 12. Intellectual Property: [...] You do not acquire any ownership rights in search results, which are compiled from third-party sources.

## Plan

- Pay: $20
- You get: 50 credits
- Enough for: 50 calls
- Expires: never

## Rate limit

- Batch: 1

## Speed

- Answer: in the call or by polling

## The call

- You send: type "email", query. Optional: wait, stream
- Method: POST
- Path: /v1/searches

## About the plan

- Plan: API credits
- Who can get it: anyone 18 or older with an active Pro plan

## The 36 fields the plan's answer can hold

run ID, status, search type, query, total results, total entities, result ID, entity type, platform, value, source module, username, display name, profile URL, avatar URL, bio, location, account creation date, stats, items, links, metadata, result recorded at, coverage, modules total, modules completed, modules with hits, modules succeeded, modules failed, modules skipped, modules cancelled, modules pending, module status, results available, created at, completed at

## Opsis's plans (3)

- [Opsis, top-up from $20](https://datacircle.dev/reverse-email-lookup-apis/opsis/top-up-from-20/llms.txt): $400.00 per 1,000, 23% complete, live
- [Opsis, $250 pack](https://datacircle.dev/reverse-email-lookup-apis/opsis/250-pack/llms.txt): $250.00 per 1,000, 23% complete, live
- [Opsis, $49.99 monthly](https://datacircle.dev/reverse-email-lookup-apis/opsis/49-99-monthly/llms.txt): $333.267 per 1,000, 23% complete, live

## Opsis's calls (1)

- `POST /v1/searches`: [Opsis, top-up from $20](https://datacircle.dev/reverse-email-lookup-apis/opsis/top-up-from-20/llms.txt)

## Opsis's APIs (1)

- [Opsis: reverse email lookup API pricing, 3 plans](https://datacircle.dev/reverse-email-lookup-apis/opsis/top-up-from-20/llms.txt)

## Opsis: reverse email lookup API alternatives

- [DeBounce, top-up from $15](https://datacircle.dev/reverse-email-lookup-apis/debounce/top-up-from-15/llms.txt): $63.00 per 1,000, 8% complete, live
- [Predicta Search, top-up from €15](https://datacircle.dev/reverse-email-lookup-apis/predicta-search/top-up-from-15/llms.txt): $337.59 per 1,000, 8% complete, live
- [Sherlockeye, $46 monthly, Intermediate, POST /v1/searches/sync](https://datacircle.dev/reverse-email-lookup-apis/sherlockeye/46-monthly-intermediate-post-v1-searches-sync/llms.txt): $383.333 per 1,000, 31% complete, live
- [OSINT Industries, £99 monthly, Advanced, GET /v2/request](https://datacircle.dev/reverse-email-lookup-apis/osint-industries/99-monthly-advanced-get-v2-request/llms.txt): $440.055 per 1,000, 38% 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://api.useopsis.com/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://useopsis.com/docs/api/create-search?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://useopsis.com/docs/api/credits?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://useopsis.com/docs/api/errors?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://useopsis.com/docs/api/results?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://useopsis.com/docs/api/retrieve-search?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://useopsis.com/faq?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://useopsis.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://useopsis.com/products/osint-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://useopsis.com/reverse-email-lookup?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing
- https://useopsis.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=reverse-email-lookup-api-pricing