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Two new x402 APIs for AI agents: redirect-chain mapping + llms.txt grading (2026-10-04)

Two new x402 APIs for AI agents: redirect-chain mapping + llms.txt grading (2026-10-04)

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5 min read
The EDI 810, Decoded: What an Invoice Actually Looks Like on the Wire

The EDI 810, Decoded: What an Invoice Actually Looks Like on the Wire

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3 min read
I Asked Claude to Invest $10,000. Then I Changed the Starting Date

I Asked Claude to Invest $10,000. Then I Changed the Starting Date

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12 min read
The LLM Gateway I Put in Production: 4 Decisions That Actually Mattered

The LLM Gateway I Put in Production: 4 Decisions That Actually Mattered

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4 min read
How I built a Stripe payment-link API for AI agents

How I built a Stripe payment-link API for AI agents

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4 min read
Tenant API Usage Reconciliation Explained: Finding Retry Double Counts with Node.js

Tenant API Usage Reconciliation Explained: Finding Retry Double Counts with Node.js

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8 min read
Building a Social Media Downloader: Handling Rate Limits, Format Detection, and Platform API Changes

Building a Social Media Downloader: Handling Rate Limits, Format Detection, and Platform API Changes

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3 min read
LLM Pricing Digest: Grok-4 Gets a Price Drop, and a Wave of New Models From Qwen, Xiaomi, and Z-AI

LLM Pricing Digest: Grok-4 Gets a Price Drop, and a Wave of New Models From Qwen, Xiaomi, and Z-AI

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3 min read
One request a second for the whole app, so our place search has no search-as-you-type

One request a second for the whole app, so our place search has no search-as-you-type

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7 min read
Cloud Metrics API for Startup SaaS: Reconciling Agent Spend Before Embeds

Cloud Metrics API for Startup SaaS: Reconciling Agent Spend Before Embeds

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8 min read
Four kinds of email, one endpoint, and only one caller is allowed to throw

Four kinds of email, one endpoint, and only one caller is allowed to throw

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6 min read
I Built a ChatGPT API Without Login — How the Anonymous Flow Actually Works

I Built a ChatGPT API Without Login — How the Anonymous Flow Actually Works

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2 min read
Two new x402 APIs for AI agents: CAPTCHA + botwall detection + hreflang vs sitemap cross-validator (2026-10-04)

Two new x402 APIs for AI agents: CAPTCHA + botwall detection + hreflang vs sitemap cross-validator (2026-10-04)

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4 min read
The stored-credential flag only some issuers enforce

The stored-credential flag only some issuers enforce

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1 min read
Your LLM Bill Jumped After You Added Context: Find the Cache Miss Before You Downgrade the Model

Your LLM Bill Jumped After You Added Context: Find the Cache Miss Before You Downgrade the Model

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6 min read
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