Pricing

from $0.80 / 1,000 number validateds

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WhatsApp Number Validator — Bulk CSV Export API

Try for free

Check supplied phone numbers for available WhatsApp registration signals and normalize bulk lists. Bulk export: JSON, CSV, Excel and API. PPE: from $0.8/1K number checks; usage extra.

Pricing

from $0.80 / 1,000 number validateds

Rating

4.8

(7)

Developer

Apivault Labs

Actor stats

Bookmarked

546

Total users

Monthly active users

10 hours

Issues response

3 days ago

Last modified

2026-10-03 — Bounded live checks and timeout recovery

Cap each complete provider fallback chain at 20–90 seconds, instead of multiplying per-request timeouts across retries.
Cancel worker dispatch, linked-session connections and retry delays when the live-work budget expires.
Reserve proportional finalization time for short runs and recover the deadline from run metadata when the platform deadline variable is absent.
Bound Apify API requests to 10 seconds and the platform hard deadline, export up to 500 rows per batch, and save a recovery input checkpoint before export.

Changelog

All notable changes to this Actor will be documented here.

[0.35]

Added an adaptive five-section input menu with an explicit workflow selector.
Added the MCP-friendly outputPreset control while preserving exportFormat for existing saved tasks and API integrations.
Added a stable ERRORS output and a structured invalid-input summary.
Retry inputs now retain the selected output preset and explicitly use the number-list workflow.

[0.34]

Performance — 50 concurrent live checks

Removed the internal 30-worker ceiling so the existing input control can actually request up to 50 concurrent live checks and made 50 the default.
On the same 60-number benchmark, 50 workers completed in 21.4 seconds (2.81/s), versus 45.8 seconds (1.31/s) with 30 workers. All 60 checks completed with no rate-limit or transport errors.
Long runs now print live progress every 10 seconds, including processed, resolved and remaining counts, instead of appearing idle until a pass ends.

[0.33]

Performance experiment — 30 concurrent live checks

Raised the live worker cap and default concurrency from 10 to 30 for a controlled throughput test through rotating Apify Residential sessions.
On the same 60-number benchmark, 30 workers completed in 45.8 seconds (1.31/s), versus 58.8 seconds (1.02/s) with 10 workers: about 28% higher throughput with no rate-limit or transport errors.
The timeout-safe RETRY_INPUT path remains active, so throttled or unfinished checks are preserved for another run instead of being lost or charged.

[0.32]

Added — resumable bulk runs with rotating Apify Proxy

Live attempts automatically use the caller's Apify Residential Proxy password with a fresh session for each attempt when the platform provides access.
The Actor stops live work before ACTOR_TIMEOUT_AT, delivers completed rows, and saves unfinished numbers as a ready-to-run RETRY_INPUT record.
The default run timeout is now 50 minutes instead of 5 minutes; the final 90 seconds are reserved for flushing results and the retry file safely.
Unfinished live checks are no longer included in the paid Dataset. Invalid numbers and definitive WhatsApp answers remain normal completed results.
Run summary and status now report proxy availability, completed results and the exact retry count.

[0.31]

Fixed — bulk inputs are no longer silently cut to 100 rows

The Actor now keeps every unique number supplied in large inputs, including runs without an Apify proxy password. Numbers that cannot finish a live check within the run timeout are returned honestly as check_failed instead of being dropped.
Dataset results and charge events are delivered in batches, preventing thousands of per-row API requests from exhausting the run timeout.
UK is now accepted as a user-friendly alias for the ISO country code GB.

[0.30]

Fixed — very large lists no longer fail with a timeout

On very long lists the run could hit its time limit before any results were saved, ending with a timeout and an empty dataset. The Actor now finishes within the run's time limit and returns every number it has already checked, so you always get results instead of an empty, failed run.
When a list is too large to finish in one run, the run status now says so and recommends splitting it into batches (about 500 numbers per run) for a complete WhatsApp check.

[0.29]

Fixed — live check adapted to the check service's new request format

The live registration check now uses the service's current JSON request format, restoring results after the previous format stopped being accepted.

Added — confirmed business accounts get their name in the results

Business numbers are now confirmed directly and come with a whatsappBusinessName field (new "Business name" column), so business contacts resolve even when third-party check services are unavailable.

Added — second independent live-check source

Registration checks now fall back to a second lookup service when the primary one is unavailable, so far more numbers resolve to a definitive registered/not-registered instead of a failed check. Numbers seen before are answered from the most trusted source first.

Fixed — failed live checks no longer show an empty result

Numbers whose live check could not complete now show check_failed with a clear whatsappError explanation (new column in the results table), instead of an unexplained empty "On WhatsApp" cell.

[0.24]

Improved — registration accuracy and reliability

More consistent registration results and clearer handling of unavailable data.
Bulk-run performance and stability improvements.

[0.23]

Added — visual quick-start guide

Added a concise 20-second walkthrough showing input, validation results and export.

Improved — faster and more reliable

Speed and performance improvements, so large lists finish noticeably faster.
Various under-the-hood updates for a smoother, more consistent run.

[0.22]

Fixed — accurate "returned" count in the run log & summary

The run log and summary now report the number of records actually delivered (instead of the number checked), so the count always matches the dataset.

[0.21]

Fixed — result delivery now respects the run's charge limit

Result delivery now stops exactly at the run's charge limit, so you always get the full set of numbers you paid for and never a partial, unbilled remainder.

[0.20]

Changed — every number is returned (no hidden filters)

The Actor now returns one row for every number you submit, each carrying valid and whatsapp true/false flags — filter the list yourself in a spreadsheet or CRM. Removed the onlyValid, onlyWhatsappCapable and onlyWhatsappRegistered output filters that previously trimmed the results.

Fixed — valid registered numbers no longer marked "not registered"

Corrected a case where genuinely registered numbers could come back as "not registered". Registration is now reported accurately, with the public profile photo returned when available.

Improved — faster bulk checks

Live checks run in parallel with quicker retries, so large lists finish faster and more numbers resolve to a definitive true/false.

[0.19]

Improved — big lists resolve far more numbers (fewer "unknown")

Large lists now return a definitive result for far more numbers, so fewer come back as "unknown".
Numbers that genuinely can't be confirmed stay unknown (never a fake "no").
Tip: a lower whatsappConcurrency (e.g. 5) can raise the resolved rate on very large lists.

[0.18]

Improved — higher match rate

More numbers get a definitive registered yes/no — including accounts that hide their profile photo — so fewer come back "unknown", and none are silently downgraded to "not registered".

[0.17]

Fixed — fewer wrong "not registered" answers

A number is now only reported "not registered" when it truly is; anything that can't be confirmed stays unknown (null) instead.
New field whatsappStatus — registered / not_registered / unknown, so "we couldn't check this one" is never mistaken for "this number has no WhatsApp". Shown as "Check result" in the results table and CSV export.

[0.15]

Changed — cheaper live check, available on more plans

The live check now costs less to run and works on more Apify plans.

[0.14]

Changed — faster live check

Much faster on large lists. On the free tier the live check is skipped and you still get the full offline validation (validity, line type, carrier, country, timezone).

[0.13]

Changed — free tier limit

Free users limited to 100 numbers per run until tiered pricing takes effect. Paid Apify users have no limit.

[0.12]

Fixed — live check reliable again

Resolved a reliability issue that made bulk runs under-report registrations. The live check now works consistently.

[0.11]

Fixed — valid numbers were being marked "not registered"

Corrected the live check: many valid, registered numbers (especially regular personal accounts) were incorrectly returned as not-registered. Registration is now reported accurately, and the public profile photo is returned when available.

[0.10]

Fixed — live registration check restored

The live check is reliable again after previously returning every number as "not registered".

[0.9] — 2026-07-17

Fixed — far fewer "unknown" WhatsApp results

Registrations that used to get lost are now returned correctly, pushing the share of definitive true/false results close to 100% on a run.

[0.7] — 2026-07-03

Added — optional live WhatsApp registration check (beta)

checkWhatsapp — turn it on to verify whether each valid, mobile-capable number is registered on WhatsApp right now. Adds whatsappRegistered (true / false) and, when the account is public, a whatsappProfilePic URL. Off by default, so the Actor stays 100% offline and instant unless you ask for the live check.
Best-effort with graceful fallback — you always get the full offline result, never a failed run.
New tuning inputs whatsappConcurrency and whatsappTimeout (only used when the live check is on). No price change.

[0.6] — 2026-07-03

Fixed

whatsappCapable no longer reads false for every US/Canada number. These plans can't be split from landline offline, so they were graded maybe and the boolean showed false — making a whole list of valid US mobiles look un-reachable. whatsappCapable is now true when a line can hold a WhatsApp account (confirmed mobile or mobile-capable plan), and false only for landline / VoIP / toll-free / invalid.
Boolean now matches the onlyWhatsappCapable filter.
The graded whatsappCapability field (yes / maybe / no) is unchanged.

Changed

phoneNumbers is no longer required. You can run with just the bulk paste field (numbersText).

[0.5] — 2026-06-25

Fixed

WhatsApp capability was marking almost every number as capable. For numbering plans that can't separate mobile from landline (notably US/Canada), every number was treated as whatsappCapable: true.
Capability is now graded honestly with a whatsappCapability field: "yes" (confirmed mobile), "maybe" (mobile-or-landline plan — needs a live check), "no" (landline / VoIP / toll-free / invalid).
onlyWhatsappCapable now keeps yes + maybe and drops no.
valid is unchanged.

[0.4] — 2026-06-10

Changed

Renamed to "Fast WhatsApp Number Validator" — validates thousands of numbers in seconds.
Memory capped (128–1024 MB) to keep runs cheap and predictable.
Single tier: $1.5/1K, fully offline. Removed the optional premium live-check tier and its inputs. The Actor is login-free and key-free end to end.

[0.3] — 2026-06-10

Changed

Price lowered to $1.5/1K (was $2/1K).

Added

Bulk paste field (numbersText) — paste a whole list / copied spreadsheet column; merged with phoneNumbers.
Dataset views — "Validated numbers" + "WhatsApp-ready (clean list)".
Input is flattened and de-duplicated — numbers pasted together (newline / comma / semicolon separated) are split apart, and duplicates removed so you are never charged twice for the same number.

[0.1] — 2026-06-08

Added — initial release

Offline bulk validation: validity, E.164 / international / national formats, country, region, carrier, line type (mobile / landline / VoIP …) and time zones.
whatsappCapable flag — true for valid mobile numbers that can hold a WhatsApp account.
Cleanup filters — onlyValid and onlyWhatsappCapable.
Optional live WhatsApp-registration check.
CSV export (exportFormat) with spreadsheet-friendly columns.
Per-run SUMMARY written to the key-value store (not billed).

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michael.g/whatsapp-number-validator

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WhatsApp Number Validator — Bulk CSV Export API

2026-10-03 — Bounded live checks and timeout recovery

Changelog

[0.35]

[0.34]

Performance — 50 concurrent live checks

[0.33]

Performance experiment — 30 concurrent live checks

[0.32]

Added — resumable bulk runs with rotating Apify Proxy

[0.31]

Fixed — bulk inputs are no longer silently cut to 100 rows

[0.30]

Fixed — very large lists no longer fail with a timeout

[0.29]

Fixed — live check adapted to the check service's new request format

Added — confirmed business accounts get their name in the results

Added — second independent live-check source

Fixed — failed live checks no longer show an empty result

[0.24]

Improved — registration accuracy and reliability

[0.23]

Added — visual quick-start guide

Improved — faster and more reliable

[0.22]

Fixed — accurate "returned" count in the run log & summary

[0.21]

Fixed — result delivery now respects the run's charge limit

[0.20]

Changed — every number is returned (no hidden filters)

Fixed — valid registered numbers no longer marked "not registered"

Improved — faster bulk checks

[0.19]

Improved — big lists resolve far more numbers (fewer "unknown")

[0.18]

Improved — higher match rate

[0.17]

Fixed — fewer wrong "not registered" answers

[0.15]

Changed — cheaper live check, available on more plans

[0.14]

Changed — faster live check

[0.13]

Changed — free tier limit

[0.12]

Fixed — live check reliable again

[0.11]

Fixed — valid numbers were being marked "not registered"

[0.10]

Fixed — live registration check restored

[0.9] — 2026-07-17

Fixed — far fewer "unknown" WhatsApp results

[0.7] — 2026-07-03

Added — optional live WhatsApp registration check (beta)

[0.6] — 2026-07-03

Fixed

Changed

[0.5] — 2026-06-25

Fixed

[0.4] — 2026-06-10

Changed

[0.3] — 2026-06-10

Changed

Added

[0.1] — 2026-06-08

Added — initial release

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Changelog

[0.35]