# Fiber AI, free, 7-day free trial: Email validation API

> Email validation tells you whether an address will bounce before you send to it. Send one email, we return a verdict, a deliverability score out of 100, and flags for catch-all, role-based, disposable, and consumer addresses.

Fiber AI's email validation API on its 7-day free trial plan, $0.00 per 1,000 emails.

- This page: https://datacircle.dev/validate-email-apis/fiber-ai/free-7-day-free-trial
- Get it: https://www.fiber.ai/pricing
- Its API docs: https://api.fiber.ai/ai-docs/emailBounceDetection.md
- Sold by: Fiber AI (https://www.fiber.ai)
- Checked: 2026-10-17

## Price

- $ per 1,000: $0.00
- Billing: free

## Charges

- Per: call

## Not found

- $ per 1,000: $0.00

## Catch-all

- $ per 1,000: $0.00

## In their words

- Their pitch: Email validation tells you whether an address will bounce before you send to it. Send one email, we return a verdict, a deliverability score out of 100, and flags for catch-all, role-based, disposable, and consumer addresses.

## Data

- Freshness: live
- Keep data: a limited, non-exclusive, non-transferable, non-sublicensable right to (A) view and store the Prospect Data [...] Prospect Data and Usage Data are Confidential Information of Fiber AI. [...] After any expiration or termination of these Terms, or at any time upon request from Fiber AI, Customer will immediately return or destroy (at Fiber AI's sole direction) all materials or media containing any Confidential Information
- Use data: solely for purposes of conducting business-to-business sales, marketing, or business development activities and for Customer's other internal business purposes (the "Permitted Uses"). Customer may not resell, transfer, assign, or sublicense Customer's rights under these Terms to any third party or use the Services to run an outsourcing business or provide services for the benefit of any third party. [...] Customer (A) will not, and will ensure that Customer Personnel do not, incorporate any Prospect Data into Customer's products or services or otherwise resell, sublicense, or distribute any Prospect Data, (B) will not [...] present the Prospect Data so that it appears to be made available by any third party, (C) will process all Prospect Data in accordance with Laws, including Privacy and Data Laws [...] (F) not use the Services, including Prospect Data, to determine a consumer’s eligibility for (i) credit or insurance for personal, family or household purposes, (ii) employment or (iii) a government license or benefit or (iv) any other purpose governed by the Fair Credit Reporting Act [...] Customer will not [...] (h) develop any scripts or software applications that interact with or integrate with the Services unless first authorized in writing by Fiber AI [...] The Services are currently authorized to be used only in the United States to facilitate business-to-business sales, marketing, or business development communications with individuals in the United States

## Plan

- Pay: $0
- You get: 500 credits
- Enough for: 500 calls, once
- Expires: when a canceled trial's period ends, credits zero out

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email
- Method: POST
- Path: /v1/validate-email/single

## About the plan

- Plan: 7-day free trial
- Who can get it: anyone with a payment method on file, to use only in the United States

## The 18 fields in the plan's answer

email, verdict, deliverability score, catch-all, role-based, disposable, consumer, email provider, charge method, credits charged, credits refunded, charge message, credits remaining, low credit message, get more credits URL, warning field, warning message, advice

## Fiber AI's plans (10)

- [Fiber AI, free, Cardless API trial](https://datacircle.dev/validate-email-apis/fiber-ai/free-cardless-api-trial/llms.txt): $0.00 per 1,000, live
- [Fiber AI, free, 7-day free trial](https://datacircle.dev/validate-email-apis/fiber-ai/free-7-day-free-trial/llms.txt): $0.00 per 1,000, live
- [Fiber AI, $3 pack](https://datacircle.dev/validate-email-apis/fiber-ai/3-pack/llms.txt): $30.00 per 1,000, live
- [Fiber AI, $300 monthly](https://datacircle.dev/validate-email-apis/fiber-ai/300-monthly/llms.txt): $20.00 per 1,000, live
- [Fiber AI, $900 monthly](https://datacircle.dev/validate-email-apis/fiber-ai/900-monthly/llms.txt): $18.00 per 1,000, live
- [Fiber AI, $2,400 monthly](https://datacircle.dev/validate-email-apis/fiber-ai/2400-monthly/llms.txt): $16.00 per 1,000, live
- [Fiber AI, $3,000 yearly](https://datacircle.dev/validate-email-apis/fiber-ai/3000-yearly/llms.txt): $16.667 per 1,000, live
- [Fiber AI, $9,000 yearly](https://datacircle.dev/validate-email-apis/fiber-ai/9000-yearly/llms.txt): $15.00 per 1,000, live
- [Fiber AI, $24,000 yearly](https://datacircle.dev/validate-email-apis/fiber-ai/24000-yearly/llms.txt): $13.333 per 1,000, live
- [Fiber AI, contact us](https://datacircle.dev/validate-email-apis/fiber-ai/contact-us/llms.txt): live

## Fiber AI's calls (1)

- `POST /v1/validate-email/single`: [Fiber AI, free, 7-day free trial](https://datacircle.dev/validate-email-apis/fiber-ai/free-7-day-free-trial/llms.txt)

## Similar plans of other providers

- [Airscale, free](https://datacircle.dev/validate-email-apis/airscale/free/llms.txt): $0.00 per 1,000, live
- [Anymail Finder, free](https://datacircle.dev/validate-email-apis/anymail-finder/free/llms.txt): $0.00 per 1,000, live
- [BetterEnrich, free, 100 credits free, POST /api/v1/verify-catch-all-email](https://datacircle.dev/validate-email-apis/betterenrich/free-100-credits-free-post-api-v1-verify-catch-all-email/llms.txt): $0.00 per 1,000, live
- [Bouncer, free, 100 free credits, POST /v1.1/email/verify/batch](https://datacircle.dev/validate-email-apis/bouncer/free-100-free-credits-post-v1-1-email-verify-batch/llms.txt): $0.00 per 1,000, live

## Sources

From each provider's own pricing page and docs. We read this row from these pages on 2026-10-17.

- https://api.fiber.ai/ai-docs/emailBounceDetection.md
- https://api.fiber.ai/llms-full.txt
- https://docs.fiber.ai/account
- https://docs.fiber.ai/account/quickstart
- https://docs.fiber.ai/billing
- https://docs.fiber.ai/billing/pricing
- https://docs.fiber.ai/build/rate-limits
- https://docs.fiber.ai/enrichment/email-validation
- https://docs.fiber.ai/linkedin/live-fetch
- https://www.fiber.ai/llms.txt
- https://www.fiber.ai/pricing
- https://www.fiber.ai/pricing.md
- https://www.fiber.ai/terms