# Outsend, free: Email verification API

> It checks syntax, spots obvious typos, resolves MX records, opens a probe against the receiving server, and filters out disposable domains and suspect prefixes (test@, noreply@, abuse@ and similar).

Outsend's email verification API on its Alpha plan. It costs $0.00 per 1,000 emails. Outsend's docs list 2 of the 6 key fields we check: Address, Deliverability.
You get up to 9,000 calls a month.
We haven't run Outsend through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
This plan is free. We rank 3,952 plans for email verification APIs by price. Half the plans cost $1.999 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.
[pingutil](https://datacircle.dev/validate-email-apis/pingutil/free-api-key-post-v1-verify/llms.txt), [MailTester Ninja](https://datacircle.dev/validate-email-apis/mailtester-ninja/23-99-monthly/llms.txt) and [Giggal](https://datacircle.dev/validate-email-apis/giggal/39-pack-50000-credits-post-v1-verify/llms.txt) are the best email verification API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-email-apis/outsend/free
- [Email validation API: 200+ verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://outsend.xyz/en/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://outsend.xyz/api/jobs/verify-emails`
- API key: with the plan, on https://outsend.xyz/en/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://outsend.xyz/docs/modules/verify_emails?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: Outsend (https://outsend.xyz?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-06

## In the answer

- Completeness: 33%
- Address: ✓
- Deliverability: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Scrap (Google Maps) · SIRENE registry · Reviews · Emails · Socials · Extra phones · Public-registry enrichment · Find the website · Business IDs · Legal mentions · French legal data · Financial data · Pricing · Tech stack · PageSpeed · Ads profile · Brand assets · Closed check · Phone info · Inbox placement

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: It checks syntax, spots obvious typos, resolves MX records, opens a probe against the receiving server, and filters out disposable domains and suspect prefixes (test@, noreply@, abuse@ and similar).

## Data

- Freshness: live
- What it checks: format, mail servers, disposable domains, role addresses, mailbox
- Keep data: no limit
- Use data: The data collected by the user through outsend (scraping results, enrichments, filtered lists, notes, monitoring) remains the property of the user. [...] The following are strictly prohibited, on pain of immediate account suspension without notice or refund: Spam, harassment, mass sending of unsolicited messages in breach of GDPR, e-Privacy or CAN-SPAM, Outreach to private individuals without a legal basis (prior consent required for B2C in France), Collection or use of sensitive data within the meaning of GDPR (health, political/religious views, sexual orientation, biometric data, etc.), Resale, public sharing or transfer to a third party of leads collected through outsend, unless explicit agreement with that third party and GDPR compliance, Use of outsend for illegal, fraudulent activities or activities harming third parties, Any attempt to bypass outsend's security measures or access other users' data. [...] The user commits to respecting, when using the collected data: GDPR: legal basis of processing, information of data subjects, data subject rights (access, deletion, objection), The French Data Protection Act (Loi Informatique et Libertés), Article L.34-5 of the French Postal and Electronic Communications Code on electronic outreach, CNIL recommendations on B2B outreach (in particular clear opt-out, sender identification, respect of objections).

## Plan

- Pay: $0
- Enough for: 9,000 calls a month

## Rate limit

- Per day: 300
- Concurrent: 5
- Batch: 10,000

## Speed

- Answer: by polling or webhook

## The call

- You send: items[].email. Optional: source_job_id
- Method: POST
- Path: /api/jobs/verify-emails

## About the plan

- Plan: Alpha
- Who can get it: anyone with an account, within the seats opened each day during the alpha

## The 7 fields the plan's answer can hold

email address, status, category, reason, did you mean, SMTP code, catch-all

## Outsend's plans (2)

- [Outsend, free](https://datacircle.dev/validate-email-apis/outsend/free/llms.txt): $0.00 per 1,000, 33% complete, live
- [Outsend, top-up](https://datacircle.dev/validate-email-apis/outsend/top-up/llms.txt): $1.013 per 1,000, 33% complete, live

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

- `POST /api/jobs/verify-emails`: [Outsend, free](https://datacircle.dev/validate-email-apis/outsend/free/llms.txt)

## Outsend's APIs (6)

- [Outsend: Local business reviews API pricing, 2 plans](https://datacircle.dev/local-business-reviews-apis/outsend/free/llms.txt)
- [Outsend: Local business search API pricing, 2 plans](https://datacircle.dev/local-business-search-apis/outsend/free/llms.txt)
- [Outsend: tech stack API pricing, 2 plans](https://datacircle.dev/company-technology-apis/outsend/free/llms.txt)
- [Outsend: email verification API pricing, 2 plans](https://datacircle.dev/validate-email-apis/outsend/free/llms.txt)
- [Outsend: phone validation API pricing, 1 plan](https://datacircle.dev/validate-phone-apis/outsend/free/llms.txt)
- [Outsend: business verification API pricing, 1 plan, GET /api/company/lookup](https://datacircle.dev/business-verification-apis/outsend/free-alpha-get-api-company-lookup/llms.txt)
- [Outsend: business verification API pricing, 1 plan, POST /api/jobs/legal-data](https://datacircle.dev/business-verification-apis/outsend/free-alpha-post-api-jobs-legal-data/llms.txt)

## Outsend: email verification API alternatives

- [MyEmailVerifier, $1,299 monthly, Monthly Subscription, 5,000,000 emails + 250,000 bonus, GET /verifier/validate_single/{email}/{API_KEY}](https://datacircle.dev/validate-email-apis/myemailverifier/1299-monthly-monthly-subscription-5000000-emails-250000-bonus-get-verifier-validate-single-email-api-key/llms.txt): $1.002 per 1,000, 33% complete, live
- [ListWise, $1,010 monthly, 1 Million Premium, GET /clean/realtime.php](https://datacircle.dev/validate-email-apis/listwise/1010-monthly-1-million-premium-get-clean-realtime-php/llms.txt): $1.01 per 1,000, 33% complete, live
- [Captain Verify, €225 monthly, 250,000 Email Verifications, subscription, GET /verify](https://datacircle.dev/validate-email-apis/captain-verify/225-monthly-250000-email-verifications-subscription-get-verify/llms.txt): $1.013 per 1,000, 33% complete, live
- [No2Bounce, $254 monthly](https://datacircle.dev/validate-email-apis/no2bounce/254-monthly/llms.txt): $1.016 per 1,000, 0% 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 2026-11-06.

- https://outsend.xyz/api/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://outsend.xyz/docs/api/auth?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://outsend.xyz/docs/api/overview?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://outsend.xyz/docs/concepts/limits?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://outsend.xyz/docs/llms-full.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://outsend.xyz/docs/modules/verify_emails?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://outsend.xyz/docs/what-is-outsend?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://outsend.xyz/en/cgv?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://outsend.xyz/en/conditions?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://outsend.xyz/en/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing