# Trestle, free: Email verification API

> Real Contact API is a comprehensive lead verification API that confirms the legitimacy and contactability of your consumer or business data in real-time.

Trestle's email verification API on its Free trial plan. It costs $0.00 per 1,000 emails. It returns 1 of the 6 key fields we check: Deliverability.
You get up to 25 calls in all.
We rank 3,227 plans by price. [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/trestle/free
- [Best email verification API in 2026: providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://trestleiq.com/pricing/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `GET https://api.trestleiq.com/2.0/real_contact`, Real Contact API
- API key: with the plan, on https://trestleiq.com/pricing/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://docs.trestleiq.com/api-reference/real-contact-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: Trestle (https://trestleiq.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-10-29

## In the answer

- Completeness: 17%
- Deliverability: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Real Contact API is a comprehensive lead verification API that confirms the legitimacy and contactability of your consumer or business data in real-time.

## Data

- Freshness: stored
- What it checks: format, mail servers
- Keep data: for the duration of this Agreement
- Use data: Customer is authorized to use the Trestle Data for identity verification, lead verification, identity management, caller identification, routing, prioritization use cases, to scrub lists for outbound dialing, and/or for any additional use case(s) expressly set forth on the applicable Order. Customer will not, and shall ensure its Affiliates and Users do not: (a) use the Trestle Data for marketing purposes except to respond to an inbound request, (b) use the Trestle Data in violation of any applicable laws, rules, or regulations or in violation of any third-party right, (c) store or otherwise use the Trestle Data for purposes other than the internal business purposes of the Customer, as contemplated in the applicable Order or Customer Agreement, (d) use the Trestle Data in conjunction with activities prohibited by law, (e) store or cache the Trestle to avoid making additional Queries to the Services, (f) merge stored Trestle Data with other data unless it is coded or tagged to indicate Trestle as its source, or (g) use the Trestle Data for file download in a fixed page format (i.e., create a printable, downloadable directory of personal information). [...] Customer will not: (a) make any Services or Trestle Data available to anyone other than Customer, its Affiliates, and their respective Users, (b) use the Services or Trestle Data for the benefit of anyone other than Customer or its Affiliates, (c) resell, distribute, or otherwise disclose or make available the Services or Trestle Data [...] without the prior written consent of Trestle [...] (h) use the Services or Trestle Data to build a competitive product or service [...] Customer may not use the Services or Trestle Data in connection with any FCRA purpose

## Plan

- Pay: $0
- Enough for: 25 calls, once
- Expires: 14 days

## Rate limit

- Per second: 10
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: name, phone. Optional: first_name, last_name, business.name, email, address.street_line_1, address.street_line_2, address.city, address.state_code, address.postal_code, address.country_code, ip_address, add_ons, source_id
- Method: GET
- Path: /2.0/real_contact

## About the plan

- Plan: Free trial
- Who can get it: companies, with a business email address

## The 4 fields the plan's answer can hold

valid, contact grade, name match, warnings

## Trestle's plans (3)

- [Trestle, free](https://datacircle.dev/validate-email-apis/trestle/free/llms.txt): $0.00 per 1,000, 17% complete, stored
- [Trestle, top-up from $10, Self-Serve, pay as you go, GET /2.0/real_contact, Real Contact API](https://datacircle.dev/validate-email-apis/trestle/top-up-from-10-self-serve-pay-as-you-go-get-2-0-real-contact-real-contact-api/llms.txt): $30.00 per 1,000, 33% complete, stored
- [Trestle, contact us, Enterprise, GET /2.0/real_contact, Real Contact API](https://datacircle.dev/validate-email-apis/trestle/contact-us-enterprise-get-2-0-real-contact-real-contact-api/llms.txt): 17% complete, stored

## Trestle's calls for this API (2)

- `GET /2.0/real_contact`, Real Contact API: [Trestle, free](https://datacircle.dev/validate-email-apis/trestle/free/llms.txt)
- `GET /2.0/real_contact`, Real Contact API, full: [Trestle, top-up from $10, Self-Serve, pay as you go, GET /2.0/real_contact, Real Contact API, full](https://datacircle.dev/validate-email-apis/trestle/top-up-from-10-self-serve-pay-as-you-go-get-2-0-real-contact-real-contact-api-full/llms.txt)

## Trestle's APIs (2)

- [Trestle: email verification API pricing, 3 plans](https://datacircle.dev/validate-email-apis/trestle/free/llms.txt)
- [Trestle: phone validation API pricing, 3 plans, GET /3.0/phone_intel, Phone Validation API](https://datacircle.dev/validate-phone-apis/trestle/free/llms.txt)
- [Trestle: phone validation API pricing, 3 plans, GET /2.0/real_contact, Real Contact API](https://datacircle.dev/validate-phone-apis/trestle/free-trial-get-2-0-real-contact/llms.txt)

## Trestle: email verification API alternatives

- [Bytemine, $250 monthly, Starter, POST /fraud-check](https://datacircle.dev/validate-email-apis/bytemine/250-monthly-starter-post-fraud-check/llms.txt): $25.00 per 1,000, 50% complete, stored
- [Minelead, $348 yearly, Starter, GET /detect-disposable](https://datacircle.dev/validate-email-apis/minelead/348-yearly-starter-get-detect-disposable/llms.txt): $29.00 per 1,000, 33% complete, stored
- [TrekMail, $29 monthly, Agency, POST /verify, Verify one address (quick)](https://datacircle.dev/validate-email-apis/trekmail/29-monthly-agency-post-verify-verify-one-address-quick/llms.txt): $29.00 per 1,000, 50% complete, stored
- [Strale, pay as you go, x402 (USDC on Base), GET /x402/email-validate](https://datacircle.dev/validate-email-apis/strale/pay-as-you-go-x402-usdc-on-base-get-x402-email-validate/llms.txt): $32.40 per 1,000, 50% complete, stored

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-29.

- https://docs.trestleiq.com/api-reference/phone-validation-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.trestleiq.com/api-reference/real-contact-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.trestleiq.com/openapi/phone-validation.openapi.yaml?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.trestleiq.com/openapi/real-contact.openapi.yaml?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://trestleiq.com/email-deliverability/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://trestleiq.com/knowledge-base/developer-portal-wallet-frequently-asked-questions/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://trestleiq.com/knowledge-base/everything-to-know-about-real-contact-api-2-0/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://trestleiq.com/knowledge-base/everything-to-know-about-the-email-deliverability-add-on/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://trestleiq.com/knowledge-base/getting-started-with-trestles-developer-portal-wallet/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://trestleiq.com/knowledge-base/how-is-trestles-phone-activity-score-calculated/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://trestleiq.com/knowledge-base/how-often-is-trestles-data-updated/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://trestleiq.com/knowledge-base/how-to-identify-disconnected-phone-numbers-automatically/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://trestleiq.com/knowledge-base/how-trestles-activity-score-is-different-from-hlr-lookups/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://trestleiq.com/knowledge-base/understanding-trestles-free-api-trial-and-the-api-access-request-process-for-specific-products/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://trestleiq.com/knowledge-base/what-is-our-global-phone-validation-coverage/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://trestleiq.com/knowledge-base/what-is-the-default-and-max-qps-supported/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://trestleiq.com/knowledge-base/what-queries-are-billable/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://trestleiq.com/knowledge-base/why-wont-my-email-work-to-signup-for-trestle/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://trestleiq.com/phone-validation-api/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://trestleiq.com/pricing/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://trestleiq.com/real-contact-api/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://trestleiq.com/terms-of-service/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing