Payment, SMS & Courier API Documentation Archive

A centralized repository containing API specifications, technical integration flows, official documentation PDFs, email communication records, and sandbox testing results for Payment Gateways, SMS Providers, and Courier Services.

Note

Credential Sanitization: All live credentials, API keys, passwords, private keys, and secrets across all files have been replaced with standard sanitized placeholders like <<<PLACEHOLDER>>>.

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Repository Directory Structure

payment-sms-courier-api-docs/
├── payment-gateways/
│   ├── bkash/                         # bKash Tokenized Checkout (V2)
│   ├── bkash-recurring/               # bKash Recurring Payment Gateway (RPP)
│   ├── nagad/                         # Nagad Online PGW (DFS API)
│   ├── ssl-commerz/                   # SSLCOMMERZ Standard Checkout (v4)
│   ├── ssl-commerz recurring/         # SSLCOMMERZ Recurring & Easycheckout
│   └── upay/                          # Upay (UCB Fintech) PGW (v4.1.0)
│
├── sms-gateways/
│   ├── bulksmsbd/                     # BulkSMSBD Single/Multi SMS & OTP API
│   └── ssl smsplus/                   # SSL Wireless SMSPlus v3.0.0 Push SMS
│
└── courier-services/
    └── steadfast/                     # SteadFast Courier API v1

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Service Summaries

1. Payment Gateways (payment-gateways/)

• bkash/

  • Tokenized Checkout V2 integration: error codes (bkash_error_codes.txt), API request traces (bkash_testing_example.txt), official specification (PGW Tokenized Payment V2(Non-Beta) -- API Specification - V1.2.pdf), email communication threads (email1.txt through email4.txt, email3.0-reply.txt).

• bkash-recurring/

  • bKash Recurring Payment Gateway (RPP) documentation: full architecture flow (bkash-recurring-flow.md), Mermaid sequence diagrams (flow-diagram.md), OpenAPI 3.0 Postman spec (api-docs.json), API payload examples (api-example.txt), official guides (Recurring Payment Merchant Integration Guide v2.1.2.pdf / .txt, Recurring Payment Sample API Request.pdf), email threads (email1.txt through email4.txt, email1-reply.txt through email3-reply.txt), Bruno API collection (bkash-recurring-testing-bruno/), and sandbox testing reports (testing/ with Sandbox Test Template.txt, bkash-RPP-sandbox-report.pdf / .tex).

• nagad/

  • Nagad Online Payment PGW: official guide (ilide.info-nagad-online-payment-api-integration-guide-v3-3.pdf / .txt), RSA key templates (merchantPrivateKey.txt, pgPublicKey.txt), onboarding emails (email1.txt, email1-task.txt, email2.txt), and live merchant portal reference screenshots.

• ssl-commerz/

  • SSLCOMMERZ Standard Checkout v4.00 technical guide (Documentation for SSLCOMMERZ.md) and store credentials/endpoints reference (creds.txt).

• ssl-commerz recurring/

  • SSLCOMMERZ Recurring & Subscription flow (sslcommerz-recurring-flow.md), manual cURL execution guide (ssl-recurring-manual-curl.md), Postman collection (ssl-recurring-subscription-manual.postman_collection.json), Refer/Salt email note (recurring-creds.txt), and official Easycheckout guide (SSLCOMMERZ_Recurring_Easycheckout_v2.02.pdf).

• upay/

  • Upay PGW v4.1.0 official guide (Upay payment gateway API doc for merchant V4.1.0.pdf / .md), live credentials email (Live_Credentials.txt), and test credentials (Test_Credetials_of_PGW 4.txt).

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2. SMS Gateways (sms-gateways/)

• bulksmsbd/

  • Single/Multi-recipient SMS, OTP integration, HTTP POST parameters, and response status codes table (bulksmsbd api doc.md).

• ssl smsplus/

  • SSL Wireless Push SMS API v3.0.0 integration guide (Technical-Specification-of-Push-SMS-Connectivity-API-V3.0.0.pdf / smsplus api doc.md - PDF & Markdown versions).

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3. Logistics & Courier Services (courier-services/)

• steadfast/
  • Official SteadFast Courier API v1 guide (steadfast api doc.pdf / steadfast api doc.md - PDF & Markdown versions) and extended guide (steadfast api combined from pdf, online repos.md).