# SignupVet, free: Email verification API

> Disposable providers, typos of popular domains, dead mail servers and placeholder addresses.

SignupVet's email verification API on its Free plan. It costs $0.00 per 1,000 emails. It returns 4 of the 6 key fields we check: Address, Deliverability, Confidence, Company.
We haven't run SignupVet through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
This plan is free. We rank 3,753 plans for email verification APIs by price. Half the plans cost $1.98 per 1,000 emails or less.
[treg's top-up from $10](https://datacircle.dev/validate-email-apis/treg/top-up-from-10/llms.txt) is the cheapest paid plan per 1,000 emails: $0.00 on average. treg asks one provider after another until one answers. You pay $68.365 per 1,000 emails when no provider answers.
[Disify's $9 monthly plan (/email)](https://datacircle.dev/validate-email-apis/disify/9-monthly-starter-post-email/llms.txt) covers any number of emails. Disify's $9 monthly plan costs less up front than treg's top-up from $10.
[MailTester Ninja](https://datacircle.dev/validate-email-apis/mailtester-ninja/23-99-monthly/llms.txt), [Enrich.so](https://datacircle.dev/validate-email-apis/enrich-so/499-monthly/llms.txt) and [GetProspect](https://datacircle.dev/validate-email-apis/getprospect/369-pack/llms.txt) are the best email verification API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-email-apis/signupvet/free
- [Email validation API: 180+ verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://www.signupvet.com/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing#pricing
- Request: `POST https://www.signupvet.com/verify/email`
- API key: with the plan, on https://www.signupvet.com/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing#pricing
- Its API docs: https://www.signupvet.com/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: SignupVet (https://www.signupvet.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-05

## In the answer

- Completeness: 67%
- Address: ✓
- Deliverability: ✓
- Confidence: ✓
- Company: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Combined signup score · Phone check · IP check

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## Catch-all

- $ per 1,000: $0.00

## In their words

- Their pitch: Disposable providers, typos of popular domains, dead mail servers and placeholder addresses.

## Data

- What it checks: format, mail servers, disposable domains, role addresses
- Keep data: no limit
- Use data: You may use SignupVet only to protect your own products from fraud and abuse, and only in line with applicable law. In particular you must: have a legal basis for sending us your users' data and inform them in your privacy notice that signups are checked for fraud prevention, not use the service to harass, discriminate against or profile people beyond fraud prevention, not resell or redistribute the service or its results as a data product, scrape it [...], not overload, probe or circumvent the limits and security of the service. [...] Check people who are not your users. Do not run purchased, scraped or third-party lists through the service, build marketing or contact lists, enrich data for outreach, or look up people to track, profile or harass them. [...] Resell or repackage the service. Do not resell, sublicense or publish SignupVet results as a data product, and do not offer the API to others as part of your own lookup or verification service without a written agreement with us.

## Plan

- Pay: $0
- You get: 250 requests a month
- Enough for: 250 calls a month

## Rate limit

- Per second: 10
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email. Optional: ip, context.timezone, context.user_agent, context.referrer, context.sign_up_source, context.accept_language
- Method: POST
- Path: /verify/email

## About the plan

- Plan: Free
- Who can get it: businesses, trades and professions, not consumers

## The 17 fields the plan's answer can hold

request ID, status, risk score, risk level, recommendation, reason code, normalized email, domain, syntax valid, mail server found, disposable domain, forwarding service, role address, did you mean, confidence, data sources, latency

## SignupVet's plans (5)

- [SignupVet, free](https://datacircle.dev/validate-email-apis/signupvet/free/llms.txt): $0.00 per 1,000, 67% complete
- [SignupVet, $15 pack](https://datacircle.dev/validate-email-apis/signupvet/15-pack/llms.txt): $15.00 per 1,000, 67% complete
- [SignupVet, $49 monthly](https://datacircle.dev/validate-email-apis/signupvet/49-monthly/llms.txt): $9.80 per 1,000, 67% complete
- [SignupVet, $199 monthly](https://datacircle.dev/validate-email-apis/signupvet/199-monthly/llms.txt): $7.96 per 1,000, 67% complete
- [SignupVet, contact us](https://datacircle.dev/validate-email-apis/signupvet/contact-us/llms.txt): 67% complete

## SignupVet's calls for this API (1)

- `POST /verify/email`: [SignupVet, free](https://datacircle.dev/validate-email-apis/signupvet/free/llms.txt)

## SignupVet's APIs (2)

- [SignupVet: email verification API pricing, 5 plans](https://datacircle.dev/validate-email-apis/signupvet/free/llms.txt)
- [SignupVet: phone validation API pricing, 5 plans](https://datacircle.dev/validate-phone-apis/signupvet/free/llms.txt)

## SignupVet: email verification API alternatives

- [SalesQL, $79 monthly](https://datacircle.dev/validate-email-apis/salesql/79-monthly/llms.txt): $7.90 per 1,000, 33% complete, 120 days
- [lemlist, $1,191 quarterly](https://datacircle.dev/validate-email-apis/lemlist/1191-quarterly/llms.txt): $7.94 per 1,000, 33% complete, live
- [Elastic Email, $159 monthly, Email Marketing Starter (20,000 contacts), POST /verifications/{email}](https://datacircle.dev/validate-email-apis/elastic-email/159-monthly-email-marketing-starter-20000-contacts-post-verifications-email/llms.txt): $7.95 per 1,000, 50% complete, stored
- [ZeroBounce, $199 monthly, ZeroBounce ONE, 25,000 credits a month, POST /v2/validatebatch](https://datacircle.dev/validate-email-apis/zerobounce/199-monthly-zerobounce-one-25000-credits-a-month-post-v2-validatebatch/llms.txt): $7.96 per 1,000, 83% complete, live
- [FindLeadEmails, $399 pack](https://datacircle.dev/validate-email-apis/findleademails/399-pack/llms.txt): $7.98 per 1,000, 33% 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 2026-11-05.

- https://www.signupvet.com/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.signupvet.com/acceptable-use?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.signupvet.com/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.signupvet.com/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.signupvet.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing