Datacircle
Phone validation API

Trestle, free

Trestle's sitellms.txt
$0.00per 1,000 phones
Plan: Free trial one of Trestle's 3 plans
Call: GET /3.0/phone_intel Trestle's only call

About this item

  • Stored. You may get Trestle's answer from an earlier check of the number. Trestle's pages don't say how old its answers are.
  • Nothing to pay. You pay $0. Unused credit expires: 14 days.
  • One call. You send phone, phone.country_hint, add_ons, source_id to GET /3.0/phone_intel. The call returns whether the number is valid.
  • Who can get it: companies, with a business email address. Keep data: the agreement's term, for internal business purposes. Use data: with conditions.

Compare with similar plans

Other providers' plans with the closest prices per 1,000. Like this plan, each is a stored copy.

This planTrestle, freeAPILayer, freeMelissa, $4.97 packNumLookupAPI, freeVeriphone, free
$ per 1,000$0.00$0.00$0.00$0.00$0.00
Billingfreefreepay firstfreefree
Pay$0$0$4.97$0$0
Enough for25 calls, once100 calls a month100 calls a month100 calls a month1,000 calls a month
Freshnessstoredstoredstoredstoredstored
Who can get itcompanies, with a business email addressanyone, for non-commercial use onlyanyone who passes Melissa's KYC/AML identity checkanyoneanyone with a verified email address

Sources

From each provider's own pricing page and docs. We read this row from these pages on 2026-10-14.

  1. docs.trestleiq.com/api-reference/phone-validation-api
  2. docs.trestleiq.com/openapi/phone-validation.openapi.yaml
  3. trestleiq.com/knowledge-base/developer-portal-wallet-frequently-asked-questions/
  4. trestleiq.com/knowledge-base/getting-started-with-trestles-developer-portal-wallet/
  5. trestleiq.com/knowledge-base/how-is-trestles-phone-activity-score-calculated/
  6. trestleiq.com/knowledge-base/understanding-trestles-free-api-trial-and-the-api-access-request-process-for-specific-products/
  7. trestleiq.com/knowledge-base/what-are-the-various-sources-of-trestles-identity-data/
  8. trestleiq.com/knowledge-base/what-is-our-global-phone-validation-coverage/
  9. trestleiq.com/knowledge-base/what-is-the-default-and-max-qps-supported/
  10. trestleiq.com/knowledge-base/what-queries-are-billable/
  11. trestleiq.com/knowledge-base/why-wont-my-email-work-to-signup-for-trestle/
  12. trestleiq.com/phone-validation-api/
  13. trestleiq.com/pricing/
  14. trestleiq.com/terms-of-service/

Product details

We list each column of this plan's row on the sheet that has a value.

Price
$ per 1,000$0.00
Billingfree
Charges
Percall
Not found
$ per 1,000$0.00
In their words
Their pitchPhone Validation API allows businesses to identify disconnected phone numbers, line type, carrier lookup, and more for all phone validation needs.
Data
Freshnessstored
Keep datathe agreement's term, for internal business purposes
Use dataidentity or lead verification, caller identification, routing, prioritization, scrubbing lists for outbound dialing, marketing only in response to an inbound request, not resold or made available to others, no FCRA purpose, not cached to avoid queries, merged only tagged as Trestle's
Plan
Pay$0
Enough for25 calls, once
Expires14 days
Rate limit
Per second10
Batch1
Speed
Answerin the call
The call
You sendphone, phone.country_hint, add_ons, source_id
MethodGET
Path/3.0/phone_intel
About the plan
PlanFree trial
Who can get itcompanies, with a business email address
The 13 fields in the plan's answer

phone ID, phone number, valid, activity score, country calling code, country code, country, line type, carrier, prepaid, error code, error message, warnings