# CheckerLeak.com — Complete Technical Reference & Knowledge Base
Version: 2.2.2 | Architecture: Carrier-Grade Low-Latency REST API | Protocols: HTTP/2, TLS 1.3

## 1. System Overview
CheckerLeak.com is a carrier-grade contact intelligence and identity footprint verification engine designed for high-volume growth teams, lead generation agencies, Web3 brokers, and enterprise risk systems. It verifies phone numbers, email addresses, and digital identities across 240+ countries and territories without incurring SMS delivery fees or alerting the target recipient.

### Core Architecture Principles:
- **Zero-Retention (Privacy-First)**: CheckerLeak never persists raw phone numbers or query payloads. All memory buffers are wiped immediately after the verification pipeline returns.
- **Cascading Execution**: Local offline ITU E.164 normalization runs first (sub-millisecond), screening out invalid prefixes before invoking higher-level telecom HLR or OTT messaging probes. This reduces API spend by up to 90%.
- **Zero-KYC Crypto Settlement**: Customers can fund balance accounts anonymously via Bitcoin (BTC) or Tether (USDT ERC-20 / TRC-20) using a real-time mempool transaction scanner with instant credit allocation.

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## 2. Exhaustive Catalog of All 102 Verification Engines

### Category 1: Social & Messaging (43 Engines)
1. **Telegram Checker**: Detects whether phone number is registered on Telegram MTProto network.
2. **Telegram Days Checker**: Estimates account age in days based on user ID generation sequential algorithms.
3. **Telegram Age & Gender Checker**: Infers demographic metrics (age bracket, gender) from public profile telemetry.
4. **WhatsApp Bulk Checker**: High-throughput validation of active WhatsApp accounts.
5. **WhatsApp Advanced Checker**: Returns registration status, profile bio status, and avatar presence.
6. **WhatsApp Days Checker**: Estimates duration of WhatsApp registration.
7. **WhatsApp Age & Gender Checker**: Profile-level demographic estimation.
8. **Viber Checker**: Probes Viber directory for active mobile subscription.
9. **Viber Days Checker**: Registration duration on Viber network.
10. **Viber Avatar, Age, Gender & Others Checker**: Multi-attribute profile enrichment for Viber contacts.
11. **iMessage Checker**: Hardware-level Apple IDS directory query confirming blue-bubble routing and APNs capability.
12. **RCS Checker**: Checks GSMA Universal Profile 2.4 RCS messaging capability on Android devices.
13. **Telegram Username Registration Checker**: Verifies if a specific @username is claimed or available.
14. **Telegram Username Profile Checker**: Extracts public metadata for a verified Telegram username.
15. **Apple Checker**: Checks Apple ID association across iOS/macOS ecosystem.
16. **Facebook Checker**: Verifies phone number association with Meta Facebook Graph.
17. **Instagram Checker**: Checks if phone number is mapped to an Instagram profile.
18. **Line Checker**: Validates registration on Japan/Taiwan/Thailand's primary messaging network (LINE).
19. **Line Profile Checker**: Extracts public LINE display name and avatar presence.
20. **Botim Checker**: Verifies active account presence on UAE and Gulf region's primary VoIP app (BOTIM).
21. **Botim Age & Gender Checker**: Demographic enrichment for Gulf BOTIM users.
22. **LinkedIn Number Checker**: Detects professional LinkedIn account associated with phone number.
23. **Zalo Checker**: Verifies registration on Vietnam's leading chat platform (Zalo).
24. **Zalo Days Checker**: Account age on Zalo network.
25. **Zalo Age & Gender Checker**: Demographic indicators for Vietnamese Zalo profiles.
26. **VKontakte Checker**: Verifies account presence on VK (VKontakte), the dominant Russian/CIS social platform.
27. **Signal Checker**: Checks registration on Signal Messenger's secure directory.
28. **Twitter / X Checker**: Detects phone number association on X (Twitter).
29. **TikTok Checker**: Probes TikTok for mobile number registration and active creator handle.
30. **Microsoft Checker**: Validates phone association with Microsoft / Xbox Live accounts.
31. **Snapchat Checker**: Probes Snapchat directory for registered mobile numbers.
32. **Messenger Checker**: Validates standalone Facebook Messenger activation.
33. **GoTo Checker**: Verifies enterprise account presence on GoTo / GoToMeeting telephony.
34. **Threads Checker**: Checks profile association with Meta Threads.
35. **Band Checker**: Checks membership on Band social community platform.
36. **BongaCams Account Checker**: Verifies account presence on adult streaming network.
37. **Rabota.ru Registration Checker**: Verifies job seeker presence on Russia's Rabota recruitment portal.
38. **RusDate Registration Checker**: Probes dating profile association on RusDate.
39. **GitHub Developer Checker**: Validates phone/email link to active GitHub developer profiles.
40. **Discord & Nitro Presence Checker**: Detects Discord user registration, avatar, and Nitro badge status.
41. **OK.ru (Odnoklassniki) Checker**: Detects account presence on Odnoklassniki social network.
42. **KakaoTalk & KakaoPay Checker**: Verifies account on South Korea's super-app KakaoTalk and active KakaoPay status.
43. **WeChat Real-Name Checker**: Probes WeChat directory and real-name authentication (实名认证) indicators.

### Category 2: Crypto Exchanges & Web3 (12 Engines)
44. **KuCoin Checker**: Validates registered phone number on KuCoin crypto exchange.
45. **KuCoin Email Checker**: Validates registered email address on KuCoin.
46. **HTX Checker**: Checks mobile registration on HTX (Huobi) digital asset exchange.
47. **HTX Email Checker**: Checks email registration on HTX exchange.
48. **CoinW Checker**: Checks mobile account on CoinW global crypto exchange.
49. **CoinW Email Checker**: Checks email registration on CoinW exchange.
50. **Crypto.com Checker**: Verifies mobile registration on Crypto.com App.
51. **Crypto.com Email Checker**: Verifies email registration on Crypto.com.
52. **Binance Checker**: High-precision phone footprint probe on Binance global exchange.
53. **Binance Email Checker**: Checks email registration on Binance global exchange.
54. **OKX Checker**: Verifies mobile presence on OKX Web3 & trading exchange.
55. **OKX Email Checker**: Verifies email address registered on OKX.

### Category 3: Email Verification & Native SMTP Handshakes (19 Engines)
56. **Apple Email Checker**: Validates Apple ID registration for target email.
57. **Facebook Email Checker**: Detects email mapped to Meta Facebook accounts.
58. **Amazon Email Checker**: Confirms active Amazon customer account for given email.
59. **Instagram Email Checker**: Verifies email address linked to Instagram account.
60. **Netflix Email Checker**: Probes Netflix subscription directory for email existence.
61. **LinkedIn Email Checker**: Verifies email address mapped to LinkedIn profile.
62. **LinkedIn Email Profile Checker**: Enriches LinkedIn profile title and company using email address.
63. **Twitter / X Email Checker**: Detects X (Twitter) profile linked to email address.
64. **Pornhub Email Checker**: Checks email registration on adult entertainment platform.
65. **Gmail Account Checker**: Direct Google Workspace & Gmail mailbox handshake.
66. **Gmail Avatar Checker**: Extracts public Google profile avatar and full name.
67. **Yandex Account Checker**: Validates Yandex Mail / Yandex ID registration.
68. **Yandex Avatar Checker**: Fetches public Yandex user avatar image.
69. **Mail.ru Account Checker**: Validates active mailbox on Mail.ru network.
70. **Mail.ru Avatar Checker**: Fetches public Mail.ru user avatar.
71. **Outlook Account Checker**: Microsoft Live / Office365 mailbox verification.
72. **Yahoo Account Checker**: Yahoo Mail and AOL mailbox presence verification.
73. **Email Validation (Native RFC 5322 & MX Handshake)**: Zero-cost native SMTP port 25 handshake validating MX records, mailbox existence, and catch-all flags.
74. **TikTok Email Checker**: Verifies email address mapped to TikTok account.

### Category 4: Fintech & Neobanks (4 Engines)
75. **PayPal Account Checker**: Validates whether phone or email has an active PayPal account.
76. **Revolut Presence Checker**: Probes Revolut directory to confirm active European/UK neobank customer.
77. **Wise (TransferWise) Checker**: Checks account registration for international money transfers.
78. **CashApp $Cashtag Checker**: Detects active Square/Block CashApp account and retrieves public $Cashtag.

### Category 5: Fraud, Risk & Telecom HLR (8 Engines)
79. **Phone Number Validation**: ITU E.164 normalization, country prefix, valid national significant number.
80. **Number Active Checker**: Live SS7 / Diameter network interrogation confirming phone is currently powered on and attached to base station.
81. **High-value Users Checker**: Heuristic scoring evaluating multi-platform saturation, carrier tier, and digital footprint.
82. **Carrier Detection**: Identifies original and ported Mobile Network Operator (MNO/MVNO).
83. **Advanced US Carrier Checker**: Identifies US Tier-1 telcos (Verizon, AT&T, T-Mobile) vs MVNOs (Mint, Cricket, Boost).
84. **Sideline Checker**: Detects virtual secondary numbers issued by Sideline / Pinger.
85. **SIM Swap & Port-Out Risk**: Identifies recent IMSI changes and carrier porting within 30-90 days to prevent account takeover (ATO).
86. **Disposable & Burner Number Risk**: Flags temporary online SMS receive numbers, VoIP burners, and free SMS gateways.

### Category 6: E-Commerce, Mobility & Quick Commerce (16 Engines)
87. **E-commerce Activity Checker**: Composite e-commerce shopper footprint score.
88. **Amazon Checker**: Detects registered Amazon customer account via mobile number.
89. **MAX Checker**: Verifies Warner Bros Discovery MAX (HBO) subscriber account.
90. **MAX Full Info Checker**: Enriches plan status and profile indicators for MAX.
91. **Netflix Number Checker**: Checks Netflix mobile account registration.
92. **Spotify Email Checker**: Confirms Spotify listener or premium subscription account.
93. **DHL Checker**: Validates recipient registration on DHL Express delivery network.
94. **Airbnb Checker**: Detects active Airbnb guest or host profile.
95. **Temu Checker**: Verifies registered shopper on Temu global shopping app.
96. **Wheely Account Checker**: Validates account on luxury chauffeur service Wheely (UK, France, UAE).
97. **Uber / Careem Footprint**: Probes ride-hailing rider/driver accounts in MENA, US, and Europe.
98. **Glovo Customer Footprint**: Evaluates Glovo Cash-on-Delivery (COD) trust score and Prime membership.
99. **Talabat Gulf Delivery Checker**: Validates active food delivery customer across GCC (UAE, Saudi Arabia, Kuwait, Qatar).
100. **DoorDash & DashPass Checker**: Detects US food delivery customer and DashPass membership status.
101. **Avito Seller & Buyer Checker**: Enriches Russian classifieds footprint on Avito (reputation, listings, verified seller).
102. **Grab Super-App Footprint**: Verifies user profile across Southeast Asia's Grab ecosystem (GrabFood, GrabPay, GrabCar).

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## 3. REST API Specifications

### Base URL:
`https://checkerleak.com/v1` (Local dev: `http://127.0.0.1:8000/v1`)

### Authentication:
Pass standard Bearer token in the `Authorization` HTTP header:
`Authorization: Bearer pk_live_your_api_key_here`

### Core Endpoints:
1. `POST /v1/verify/single` — Real-time cascading verification for a single contact.
2. `POST /v1/verify/batch` — High-speed parallel list verification.
3. `POST /v1/verify/service` — Targeted probe for any single engine from the 102 catalog.
4. `POST /v1/batch/upload-file` — File upload supporting CSV and TXT formats up to 50,000 numbers per batch.
5. `GET /v1/geo/detect` — Returns client IP, ISO country code, localized telecom carriers, and recommended engines.
6. `GET /v1/billing/plans` — Returns pricing tiers and credit packs.

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## 4. Competitive Benchmarks
| Benchmark Metric | CheckerLeak.com | NumberChecker.AI | Twilio Lookup v2 |
| :--- | :--- | :--- | :--- |
| **Catalog Depth** | 102 Engines | ~18 Engines | Telecom Only (Carrier & Line Type) |
| **Apple Blue-Bubble** | Yes (Native IDS) | No | No |
| **Crypto Exchanges** | 6 Exchanges (Binance, OKX, etc.) | None | None |
| **Neobanks / Fintech** | Revolut, Wise, PayPal, CashApp | Partial | None |
| **Speed (Single Check)** | < 150ms | 1200ms - 2500ms | 350ms - 500ms |
| **Payment Anonymity** | 100% Crypto (Zero KYC) | Mandatory Stripe Card | Enterprise Agreement / Invoice |
| **Data Retention** | 0 Days (In-memory only) | Undisclosed | 30+ Days |

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## 5. Pricing Structure
- **Starter Pack**: $19.00 USD (1,000 credits, $0.019 / check)
- **Professional Pack**: $49.00 USD (5,000 credits, $0.0098 / check)
- **Enterprise Pack**: $149.00 USD (25,000 credits, $0.0059 / check)
- **Whale Custom Tier**: From $0.90 per 10,000 checks for API aggregators and high-volume brokers.