# Invalid Bounce, free: Email verification API > One REST API call. Full Swagger/OpenAPI docs included with every plan. Drop email verification into any form, CRM, or workflow. Invalid Bounce's email verification API on its Free plan. It costs $0.00 per 1,000 emails. It returns 1 of the 6 key fields we check: Deliverability. In [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt), Invalid Bounce's best plan scores 46.9 out of 100. This plan is free. We rank 3,338 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 our benchmark. - This page: https://datacircle.dev/validate-email-apis/invalid-bounce/free - [Email validation API: 160+ providers compared](https://datacircle.dev/best-email-verification-api.txt) - Get it: https://invalidbounce.com/upgrade-plan?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing - Request: `POST https://invalidbounce.com/api/bulk-verify` - API key: with the plan, on https://invalidbounce.com/upgrade-plan?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing - Its API docs: https://invalidbounce.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing - Sold by: Invalid Bounce (https://invalidbounce.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing) - Checked: 2026-11-02 ## In the answer - Completeness: 17% - Deliverability: ✓ ## Price - $ per 1,000 emails: $0.00 - Per: result - Billing: free ## Aggregators - Aggregators: none ## Charges - Also pays for: nothing else ## Not found - $ per 1,000: $0.00 ## In their words - Their pitch: One REST API call. Full Swagger/OpenAPI docs included with every plan. Drop email verification into any form, CRM, or workflow. ## Data - Freshness: live - What it checks: format, mail servers, disposable domains, role addresses, mailbox - Keep data: no limit - Use data: You agree to use the Service responsibly and in compliance with all applicable laws and regulations. The Service must not be used for any unlawful or prohibited purposes, including activities such as sending unsolicited or unauthorized emails (spam), attempting to gain unauthorized access to systems or networks, distributing malware or harmful code, or engaging in any behavior that could disrupt, damage, or interfere with the proper functioning of the Service ## Plan - Pay: $0 - You get: 139 credits - Enough for: 139 results, once ## Speed - Answer: by polling or webhook - Median: 5.73 s ## The call - You send: emails, Content-Type header "application/json" - Method: POST - Path: /api/bulk-verify ## About the plan - Plan: Free - Who can get it: anyone ## The 10 fields the plan's answer can hold status, sender reputation, catch-all, disposable, role address, greylisting, blacklist status, SPF record, DKIM record, DMARC record ## Invalid Bounce's plans (15) - [Invalid Bounce, free](https://datacircle.dev/validate-email-apis/invalid-bounce/free/llms.txt): $0.00 per 1,000, 17% complete, live - [Invalid Bounce, $24 pack](https://datacircle.dev/validate-email-apis/invalid-bounce/24-pack/llms.txt): $2.40 per 1,000, 17% complete, live - [Invalid Bounce, $46 pack](https://datacircle.dev/validate-email-apis/invalid-bounce/46-pack/llms.txt): $2.30 per 1,000, 17% complete, live - [Invalid Bounce, $79 pack](https://datacircle.dev/validate-email-apis/invalid-bounce/79-pack/llms.txt): $1.58 per 1,000, 17% complete, live - [Invalid Bounce, $112 pack](https://datacircle.dev/validate-email-apis/invalid-bounce/112-pack/llms.txt): $1.12 per 1,000, 17% complete, live - [Invalid Bounce, $179 pack](https://datacircle.dev/validate-email-apis/invalid-bounce/179-pack/llms.txt): $0.895 per 1,000, 17% complete, live - [Invalid Bounce, $299 pack](https://datacircle.dev/validate-email-apis/invalid-bounce/299-pack/llms.txt): $0.598 per 1,000, 17% complete, live - [Invalid Bounce, $449 pack](https://datacircle.dev/validate-email-apis/invalid-bounce/449-pack/llms.txt): $0.449 per 1,000, 17% complete, live - [Invalid Bounce, $799 pack](https://datacircle.dev/validate-email-apis/invalid-bounce/799-pack/llms.txt): $0.40 per 1,000, 17% complete, live - [Invalid Bounce, $33 monthly](https://datacircle.dev/validate-email-apis/invalid-bounce/33-monthly/llms.txt): $2.20 per 1,000, 17% complete, live - [Invalid Bounce, $96 monthly](https://datacircle.dev/validate-email-apis/invalid-bounce/96-monthly/llms.txt): $1.28 per 1,000, 17% complete, live - [Invalid Bounce, $248 monthly](https://datacircle.dev/validate-email-apis/invalid-bounce/248-monthly/llms.txt): $0.709 per 1,000, 17% complete, live - [Invalid Bounce, $605 monthly](https://datacircle.dev/validate-email-apis/invalid-bounce/605-monthly/llms.txt): $0.403 per 1,000, 17% complete, live - [Invalid Bounce, contact us, Custom Plan (Pay As You Go)](https://datacircle.dev/validate-email-apis/invalid-bounce/contact-us-custom-plan-pay-as-you-go/llms.txt): 17% complete, live - [Invalid Bounce, contact us, Custom Plan (Subscription Plans)](https://datacircle.dev/validate-email-apis/invalid-bounce/contact-us-custom-plan-subscription-plans/llms.txt): 17% complete, live ## Invalid Bounce's calls (1) - `POST /api/bulk-verify`: [Invalid Bounce, free](https://datacircle.dev/validate-email-apis/invalid-bounce/free/llms.txt) ## Invalid Bounce's APIs (1) - [Invalid Bounce: email verification API pricing, 15 plans](https://datacircle.dev/validate-email-apis/invalid-bounce/free/llms.txt) ## Invalid Bounce: email verification API alternatives - [MillionVerifier, $799 pack, 2,000,000 verification credits, GET /api/v3](https://datacircle.dev/validate-email-apis/millionverifier/799-pack-2000000-verification-credits-get-api-v3/llms.txt): $0.40 per 1,000, 50% complete, live - [MailTester, $999 pack](https://datacircle.dev/validate-email-apis/mailtester/999-pack/llms.txt): $0.40 per 1,000, 50% complete, live - [VeriMails, $999 pack, 2,500,000 credits, POST /api/verify/single](https://datacircle.dev/validate-email-apis/verimails/999-pack-2500000-credits-post-api-verify-single/llms.txt): $0.40 per 1,000, 67% complete, live - [BillionVerify, $200 pack, Enterprise, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/200-pack-enterprise-post-verify-bulk/llms.txt): $0.40 per 1,000, 67% 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 2026-11-02. - https://invalidbounce.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing - https://invalidbounce.com/features?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing - https://invalidbounce.com/landing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing - https://invalidbounce.com/terms-and-conditions?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing - https://invalidbounce.com/upgrade-plan?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing