CheckNumber.AI 
MAX Checker
max $12 per 10,000 checks
- Core data available
- number, activated
- Best for
- Registration filtering and list cleaning
No-code CSV REST API Exportable results
Check MAX Messenger Accounts
From a quick activation check to a full profile pull — verify phone numbers registered on MAX.
CheckNumber's MAX checker tells you whether a phone number is registered on MAX messenger and, for registered numbers, returns a full profile, without messaging or storing the number. Upload a CSV of numbers or call the REST API, and every row comes back with a clear registration verdict plus the profile signals below, ready to clean lists, enrich records, or route into your CRM.
E.164
Phone input
From $12
Per 10,000 checks
2
Task types
Submitted number +7999••••4567
MAX status yes / no
Profile fields id, name, gender, last seen, avatar
MAX Checker MAX Full Info Checker No account, number, or SIM required
Every check runs through official platform APIs on our own infrastructure. You never connect, bind, or use your own account, phone number, or SIM card — just upload your list or call the API and get results.
What CheckNumber detects for MAX
Registration status
Confirms whether the phone number is registered on MAX messenger (yes or no).
Account ID
Returns the MAX internal account id for registered numbers, a stable identifier for matching.
Display name
Returns the account display name (first or last name, sometimes partial) when available.
Gender
Returns the account gender when the user has set it.
Last seen
Returns an activity description such as last seen recently or last seen 2 days ago.
Avatar
Returns the avatar image URL when the account has one.
What You Can Check
Choose a MAX task by result depth
Both tasks accept E.164 phone numbers. Select a basic registration signal or the full profile depth depending on what your workflow needs.
MAX Full Info Checker
max_full $20 per 10,000 checks
- Core data available
- number, activated
- Best for
- Authorised profile-enrichment review
| MAX product | Task type | Input | Core data available | Best for | Current price |
|---|---|---|---|---|---|
| MAX Checker API documentation | max | Phone numbers in E.164 format | number, activated | Registration filtering and list cleaning | $12 per 10,000 checks |
| MAX Full Info Checker API documentation | max_full | Phone numbers in E.164 format | number, activated | Authorised profile-enrichment review | $20 per 10,000 checks |
Core MAX data
What each MAX task returns
These core data categories follow the configured product outputs. Exact response keys remain in the API documentation.
Registration
max - Number
- The phone number supplied for the check, in E.164 format.
- max
- Whether the number is registered on MAX messenger (yes or no).
Full profile
max_full - max
- Whether the number is registered on MAX messenger (yes or no).
- id
- The MAX account's internal user ID, available only when max is yes.
- name
- The account's display name, when populated by the user.
- gender
- The account's gender, when populated by the user.
- last_seen
- An activity status or last-seen description, such as 'last seen recently'.
- avatar
- The avatar image URL, empty when the user has no avatar.
Rows with max = no have all profile columns empty. The documented fields do not include an age field — only name, gender, last-seen status, and avatar.
Run a MAX batch in three steps
Use the no-code platform for uploaded lists or the REST API for recurring workflows.
- 1
Prepare E.164 numbers
Provide one international phone number per row with country code.
- 2
Choose the minimum result
Select max for a registration-only signal, or max_full for available profile fields.
- 3
Export mapped rows
Download the completed file and match each result to its source number.
Common Use Case
Improve MAX list quality before outreach
Qualify and enrich contact lists before reaching out to MAX users.
No-code CSV REST API Exportable results
Signal 1
Registration check — confirm in bulk whether each phone number is registered on MAX messenger.
Signal 2
Full profile — for registered numbers, pull the account id, display name, gender, last-seen status, and avatar.
Signal 3
Privacy-safe — a passive check that never messages, logs in, or notifies the account holder.
MAX FAQ
Can I check phone numbers against MAX in bulk?
Yes. Upload a CSV of up to hundreds of thousands of numbers or call the REST API, choose the task type you need, then download a result file with a registration verdict for every number. You are billed only for successful checks.
What profile details can the MAX checker return?
For registered numbers, the full task type returns the account id, display name, gender, a last-seen activity description, and an avatar URL where available. Numbers that are not registered have empty profile fields.
Does a MAX check message or notify the person?
No. The check is passive and reads registration and profile signals only. Nothing is sent to the number, and the account owner is never contacted or notified.
Is there a free trial?
Yes. New accounts receive 1,000 free checks on signup with no credit card, and every check is pay-as-you-go with no monthly fee, and the credits you top up never expire.
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