# AgentMessage, top-up from $5: Phone validation API

> Look up details for a phone number. Lookups are limited to US and Canada E.164 numbers.

AgentMessage's Pay as you go plan lets you call the phone validation API. We check each provider's docs for 9 fields. AgentMessage's docs list 4: Number, Validity, Type, Place.
We haven't run AgentMessage through [our phone validation API benchmark](https://datacircle.dev/best-phone-validation-api.txt) yet.
This plan starts with a $5 top-up. We rank 1,266 plans for phone validation APIs by price. Half the plans cost $3.55 or less per 1,000 phones.
[GuGuData's CNY 124 (about $19) monthly plan](https://datacircle.dev/validate-phone-apis/gugudata/cny-124-monthly/llms.txt) is the cheapest paid plan per 1,000 phones. GuGuData's CNY 124 (about $19) monthly plan charges nothing per call. You get as many phones as GuGuData's rate limit allows. [Neutrino API's On-Demand plan](https://datacircle.dev/validate-phone-apis/neutrino-api/pay-as-you-go-on-demand/llms.txt) costs the least for 10,000 phones a month: $0.80.
[Trestle](https://datacircle.dev/validate-phone-apis/trestle/top-up-from-10-self-serve-pay-as-you-go-get-3-0-phone-intel-phone-validation-api/llms.txt), [Data247](https://datacircle.dev/validate-phone-apis/data247/12-pack-membership-get-v3-0-verify247-phone/llms.txt) and [Abstract API](https://datacircle.dev/validate-phone-apis/abstract-api/19-monthly-starter-5000-requests-month/llms.txt) are the best phone validation API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-phone-apis/agentmessage/top-up-from-5
- [Phone validation API: the best of 50+ providers compared](https://datacircle.dev/best-phone-validation-api.txt)
- Get it: https://agentmessage.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Request: `POST https://api.agentmsg.io/v1/lookup`
- API key: with the plan, on https://agentmessage.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Its API docs: https://agentmessage.io/docs/lookups/submitLookup?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Sold by: AgentMessage (https://agentmessage.io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing)
- Checked: 2026-11-05

## In the answer

- Completeness: 44%
- Number: ✓
- Validity: ✓
- Type: ✓
- Place: ✓

## Price

- Billing: pay first

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Send a message · Assign specific phone numbers · Register a 10DLC brand · Register a 10DLC campaign

## In their words

- Their pitch: Look up details for a phone number. Lookups are limited to US and Canada E.164 numbers.

## Data

- Countries: United States, Canada
- What it checks: carrier
- Keep data: no limit
- Use data: “Customer Data” means the content, message bodies, media, recipient phone numbers, consent records, business identity information, and other data you submit to the Service or that the Service generates on your behalf. As between you and us, you own Customer Data. [...] You will use the Service only in accordance with these Terms, the Messaging Policy, the Carrier Compliance Notice, the Acceptable Use Policy, all applicable law (including the Telephone Consumer Protection Act, the CAN-SPAM Act, and state telecom statutes), and the rules of carriers, registries, and upstream providers. [...] you agree that you will not, and will not permit any third party to: [...] Scrape, crawl, or bulk-extract content from AgentMessage properties, the dashboard, or the APIs beyond rate limits and quotas applicable to your plan. [...] Resell, white-label, repackage, or proxy the Service or APIs to third parties as a substitute for those third parties having their own AgentMessage account, except as expressly authorized in writing by us.

## Plan

- Pay: $5

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: phone_number, lookup_type "advanced". Optional: Idempotency-Key header
- Method: POST
- Path: /v1/lookup

## About the plan

- Plan: Pay as you go
- Who can get it: anyone: new signups are paused and a waitlist reopens them

## The 12 fields the plan's answer can hold

lookup ID, phone number, lookup type, status, line type, messaging provider, voice provider, country code, result redacted at, requested at, completed at, cost in cents

## AgentMessage's plans (2)

- [AgentMessage, top-up from $5](https://datacircle.dev/validate-phone-apis/agentmessage/top-up-from-5/llms.txt): 44% complete
- [AgentMessage, contact us](https://datacircle.dev/validate-phone-apis/agentmessage/contact-us/llms.txt): 44% complete

## AgentMessage's calls (1)

- `POST /v1/lookup`: [AgentMessage, top-up from $5](https://datacircle.dev/validate-phone-apis/agentmessage/top-up-from-5/llms.txt)

## AgentMessage's APIs (1)

- [AgentMessage: phone validation API pricing, 2 plans](https://datacircle.dev/validate-phone-apis/agentmessage/top-up-from-5/llms.txt)

## AgentMessage: phone validation API alternatives

- [ClearoutPhone, top-up, One Time, any number of credits, POST /v1/phonenumber/bulk, Bulk Phone Number Validation, smart mode](https://datacircle.dev/validate-phone-apis/clearoutphone/top-up-one-time-any-number-of-credits-post-v1-phonenumber-bulk-bulk-phone-number-validation-smart-mode/llms.txt): 44% complete
- [aql, top-up, Prepaid credits, POST /nl/network_lookup.php, Network reference](https://datacircle.dev/validate-phone-apis/aql/top-up-prepaid-credits-post-nl-network-lookup-php-network-reference/llms.txt): 44% complete
- [EasySendSMS, top-up, Prepaid credits, POST /v1/rest/nv/query](https://datacircle.dev/validate-phone-apis/easysendsms/top-up-prepaid-credits-post-v1-rest-nv-query/llms.txt): 44% complete
- [Mobica, top-up from €25](https://datacircle.dev/validate-phone-apis/mobica/top-up-from-25/llms.txt): 44% 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 2026-11-05.

- https://agentmessage.io/docs/billing/createTopupCheckout?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://agentmessage.io/docs/billing/listTopupProducts?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://agentmessage.io/docs/errors?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://agentmessage.io/docs/lookups/getLookup?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://agentmessage.io/docs/lookups/submitLookup?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://agentmessage.io/docs/rate-limits?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://agentmessage.io/legal/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://agentmessage.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing