Sample code to log into Amazon Cognito and get Access Token [CLI curl edition]

A curl + jq CLI snippet for logging into Amazon Cognito and extracting the Access Token.

Amazon Connect Contact Flow to Lambda Function JSON Request Sample

A JSON request sample for AWS Lambda test events when the function is triggered from an Amazon Connect contact flow.

Amazon Product Advertising API Specification Changes (October 26, 2011)

A rundown of the Amazon Product Advertising API changes scheduled for October 26, 2011.

Amazon Product Advertising API Specification Changes to be Implemented on October 26, 2011 (Wednesday)

An announcement that the Amazon Product Advertising API spec changes will roll out on October 26, 2011 as planned.

[AWS] List of Book Categories (BrowseNode) Searchable with Amazon Product API

A reference table of the top-level Book BrowseNode IDs used when searching books with the Amazon Product API.

[API] Summary of Helpful Sites When Using Amazon API with PHP

A curated list of go-to reference sites for working with the Amazon Product Advertising API from PHP.

Registering New User with Initial Password Using Auth0 API

TypeScript sample of creating an Auth0 user with an initial password generated by the generate-password npm package.

About Auth0 Change Password API Specifications

Notes on Auth0's Change Password API — Gmail alias handling and identical responses for success and failure.

Reference Information for Implementing Authentication and Authorization with Auth0 + NestJS

Reference links I read when implementing authentication and authorization with Auth0 and NestJS.

Issuing a Backlog API Key to Drive It from AI Agents

I wired Backlog into Claude Code, Codex, and Hermes Agent by issuing a Backlog API key and letting the agents call the REST API directly. It runs at production level. This post covers the setup that worked, and the two things I want Backlog to improve for AI-agent use: the API key stays visible as plaintext in the browser, and its permissions cannot be scoped down.

Difference Between China's Country Codes CN and C2 #country_code

The difference between PayPal's CN and C2 country codes for China, and how to use each in cross-border e-commerce.

Cohere API Data Can Be Opted Out from Training Usage

Essential reading for developers concerned about Cohere API data privacy. From default data usage policies to simple opt-out methods via dashboard, and advanced security options like Zero Data Retention (ZDR) and private cloud deployment - we explain all options to protect your data in an easy-to-understand way.

Cohere Trial Key Pricing and Limits Summary for Free Trial

This article explains Cohere's free Trial key. After reading this, you'll understand the Trial key's pricing, usage limits, and rate restrictions, allowing you to confidently start evaluating Cohere API.

[cURL] GET/POST/PUT/DELETE

A short memo on using cURL's -X option to send GET / POST / PUT / DELETE requests.

[curl] Options for Sending RESTful Requests

A memo of reference links summarizing curl options for sending RESTful requests.

[DigitalOcean] Solution for 'You cannot create more than 10 droplets at a time' Error

Working around the 10-droplet batch limit when creating Droplets via the DigitalOcean API.

How to Search and Delete Specific Documents in Elasticsearch [curl Edition]

curl examples for searching and deleting specific documents in Elasticsearch 7.10 via the _search and _delete_by_query APIs.

How to obtain Evernote API Developer Token (with sample code)

How to obtain an Evernote Developer Token and list notebooks from Node.js, with a fix for the sample's warning.

How to obtain Evernote API key

How to obtain an Evernote API Key, use the sandbox, and request production activation.

[Facebook API] How to Post Photos to Albums and Tag People

A memo of reference links for posting photos to a Facebook album and tagging people via the Graph API.

[Facebook] Handling Revoked Permissions - 失効権限の取り扱い

A quick reference from Facebook's Handling Revoked Permissions doc on dealing with declined or revoked scopes.

[Facebook] Graph API Explorer - A Tool for Easy Social Graph Testing

A quick look at Facebook's official Graph API Explorer, a browser-based tool for testing social graph queries.

[Facebook] Getting Profile Image URLs in Various Sizes

How to fetch Facebook profile picture URLs via the Graph API, with size options and SSL support.

[Facebook] Is the Graph API Request Limit 600 Times Per Minute?

A memo about the unofficial claim that Facebook's Graph API is limited to around 600 requests per minute.

[Facebook] Language Code and Country Code (locale) List

A reference table of language and country codes usable with the locale parameter in Facebook's APIs.

[Facebook] Offline Access Permission to be Completely Discontinued on May 1, 2012

A note on Facebook's plan to fully retire the offline_access permission on May 1, 2012, and what it means for users and developers.

How to Add a Facebook App as a Tab on a Facebook Page

How to install a Facebook app as a Page tab using the /dialog/pagetab endpoint and its parameters.

For Facebook API Research and Questions, 'Facebook Stack Overflow' is Recommended

For Facebook API research and questions, Facebook Stack Overflow is the recommended resource.

Images Over 20 Megapixels Disappeared When Uploaded via Shopify GraphQL Admin API

Images over 20MP disappear via Shopify GraphQL Admin API — a note on the limits and validating uploads.

GitHub Issue Attachments Cannot Be Downloaded via API or PAT

Are you trying to programmatically download files attached to GitHub Issues? Unfortunately, this functionality is not currently supported by the API. This article shares the methods I tried and the official response from GitHub Support.

How to Send Slack Messages with Google Apps Script (GAS)

Sample code for calling a Slack Incoming Webhook from Google Apps Script via UrlFetchApp.

GraphQL Introduction Articles for REST API-Minded People

GraphQL introduction, use cases, and API design articles I read as a REST-minded engineer to get up to speed.

Investigation Summary for Utilizing G Suite Audit Logs

Notes on G Suite audit log capabilities, retention, and downloading logs via the Reports API.

[HTTP] Status code when returning errors for non-xhr requests

A note on choosing HTTP 400 Bad Request when rejecting non-xhr requests as errors.

Site for Downloading Currency Codes as CSV Files

The Google Adsense Host API docs expose ISO 4217 currency codes as a direct CSV download.

Introduction to Leaky Bucket Algorithm

Notes and reference links on the leaky bucket algorithm used by Shopify API and PAY.JP.

Technical Verification of LINE URL Scheme

Verifying the LINE URL scheme for sending text messages, with a URL-encoded example.

[Newgistics] Time Zone is America/Denver - MT(MST/MDT)

How I identified the Newgistics API timezone as America/Denver (MT) from the newgistics-ruby client.

OAuth Beginner's Article Collection

A curated reading list of beginner-friendly OAuth articles.

OAuth Articles for Beginners Summary

A link roundup of beginner-friendly OAuth articles I compiled for myself.

How to Use OAuth 2.0 in CLI and Batch Processing

A collection of references for using OAuth 2.0 from CLI tools and batch processing.

Reference Information Summary for Learning the Difference Between OpenID Connect and OAuth 2.0

Reference links and a ChatGPT-based summary to understand how OpenID Connect differs from OAuth 2.0.

Understanding OpenRouter's Transaction Fees and Cost Structure

While OpenRouter's appeal lies in having no markup on model usage fees, there are actually fees incurred when purchasing credits. This article explains the often-overlooked fee structure and key points for accurately understanding your costs.

[Parse.com] How to Send Push Notifications with REST API

curl commands for sending push notifications through the Parse.com REST API, grouped by use case.

[Android][iOS] Push Notifications via REST API with Parse.com

A curl command example for pushing notifications to Android and iOS apps via the Parse.com REST API.

PayPal Does Not Have a Function to Block Specific Accounts

PayPal has no built-in account block list, so I note how to implement one on the merchant side with SetExpressCheckout and GetTransactionDetails APIs.

PayPal RefundTransaction API cannot refund after 180 days from payment date

The PayPal RefundTransaction API cannot refund after 180 days — notes on workarounds with MassPay and DoNonReferencedCredit APIs.

[PayPal] TOKEN Valid Time is 3 Hours by Default, Maximum 72 Hours

The PayPal SetExpressCheckout TOKEN is valid for 3 hours by default and up to 72 hours on request.

[PayPal] Transaction cannot complete. error cause is unknown even to PayPal employees, so you have to contact credit card companies or banks

PayPal API Error 10417 Transaction cannot complete. — even PayPal cannot pinpoint the cause, so customers must contact their card issuer or bank.

[PEAR] Installing Services_Amazon and Trying Out the Amazon API

Installing PEAR's Services_Amazon and HTTP_Request2 to start using the Amazon API from PHP.

[PEAR] Using Amazon API's ItemSearch for Multi-keyword Search

Searching Amazon with multiple concatenated keywords via PEAR Services_Amazon's ItemSearch.

[PEAR] How to Set Proxy Information with setProxy in Services_Amazon

Fixing a Services_Amazon Malformed response error by passing proxy info through setProxy.

[PHP] Unofficial Google+ API 'php.googleplusapi'

A note on `php.googleplusapi`, an unofficial PHP client for the Google+ API of the era.

[Python] Tried Getting Product Condition Comments from Amazon API

Fetching Amazon Marketplace ConditionNote via the Product Advertising API in Python with BeautifulSoup.

[Python] I Tried the Amazon Product Advertising API

Calling the Amazon Product Advertising API from Python and searching books by keyword, with signed request code.

Rate Limit Algorithm Comparison and Case Studies

An explanation of how representative rate limiting algorithms work and guidelines for selection. Also introduces real-world adoption cases from major services including GitHub, X (Twitter), Slack, Cloudflare, Stripe, Discord, and Shopify.

Rate Limit Storage Selection: PostgreSQL vs Redis

Comparing PostgreSQL and Redis as storage for rate limiting. We explain our decision to choose PostgreSQL based on the YAGNI principle, considering current rate limit settings and existing API request flow.

Won ANTOR-JAPAN Award at 'Think Regional Revitalization in Tokyo! RESAS API Hackathon'

First-hackathon report: team Zen OS won the ANTOR-JAPAN Award at the RESAS API Hackathon.

Benefits and Drawbacks of Separating API Servers

Notes on the pros and cons of splitting API servers between a toC SPA and an admin (toE) SPA.

[Shippo] Address Validation API Returns Valid Zip Code Even When Invalid Zip Code is Passed

Shippo's Address Validation API returns VALID even for an invalid zip — verified via cURL.

Shippo Address Validation API Costs 6 Cents for Non-US Shipping Addresses

Shippo now charges $0.06 per non-US address for Address Validation API requests — notification recap.

[Shippo] Unused USPS Labels are Automatically Refunded 30 Days After Creation

Shippo auto-refunds unused USPS labels 30 days after creation, or you can call the refunds API immediately.

Reference Information for Shopify API Rate Limits

Reference notes on Shopify API rate limits, shopify-api-node's autoLimit option, and stopcock.

How to Check Differences Between Shopify API Versions

How to compare Shopify API versions using release notes and a local diff of GraphQL enum values.

How to Get Shopify Order Payment Methods [Shopify GraphQL API Edition]

Retrieving Shopify Order payment methods through the Shopify GraphQL API, with query and response samples.

Shopify Official TypeScript/JavaScript Library @shopify/shopify-api

Discovering Shopify's official TypeScript/JavaScript library @shopify/shopify-api and considering migrating from MONEI/Shopify-api-node.

Sample Code for Email Customer Search with Shopify REST Admin API - Google Apps Script (GAS) Edition

Google Apps Script sample code for exact email customer search with Shopify REST Admin API.

Sample Code for Adding/Removing Customer Tags with Shopify REST Admin API - Google Apps Script (GAS) Edition

Google Apps Script sample code for adding and removing customer tags via Shopify REST Admin API.

Sample Code for Using Shopify REST Admin API from Google Apps Script (GAS)

Sample code for calling Shopify REST Admin API from Google Apps Script to search customers by email.

How to Fix the Issue Where @username Mentions Don't Notify in Slack API

Why @username mentions no longer notify via Slack API, and how to look up @userID with users.list.

JavaScript sample code to mention User Group via Slack API

Mention a Slack User Group with <!subteam^ID|handle> and a JavaScript chat.postMessage sample.

Notation for mention posts like @channel from Slack bot

Use the <!channel> notation to make @channel mentions notify when posting from a Slack bot.

Slack Custom Emoji private API /api/emoji.add

Notes on Slack's private /api/emoji.add and the xoxs-token workaround used by slack-emojinator.

Syncing Address Information from SmartHR API to Google Sheets with Google Apps Script

A Google Apps Script sample that syncs employee address data from the SmartHR API into a Google Sheet.

Get Twitter Followers/Following Count with Twitter API and Add to Google Sheets Sample Code - Google Apps Script (GAS) Edition

A Google Apps Script sample that appends daily Twitter follower / following counts to a Google Sheet via the Twitter API.

USPS Tracking Numbers are Recycled and Not Unique Values

Why treating USPS tracking numbers as unique values is dangerous — they get recycled after delivery.

Tried Using Yahoo! Search Web API

Trying Yahoo! Japan Search Web API — registering an app ID and inspecting a browser web-search request and XML response.

Goodbye, YouTube Data API v2

YouTube Data API v2 was retired, catching my in-development service off guard — a reminder about third-party API risk.

How to Convert Issue to Epic with ZenHub API

Convert GitHub issues into ZenHub Epics by calling the convert_to_epic API endpoint with curl.

How to Update Estimates with ZenHub API

Update ZenHub issue Estimates in bulk by calling the estimate API endpoint with curl.