The handshake is the easy part. Agent payments still haven't named the custody split.
Agent payment protocols are converging fast. The Linux Foundation launched the x402 Foundation around a protocol initially developed by Coinbase, Clou…
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PayPal IPN is deprecated — the IPN Webhooks migration drops payments in four silent ways
If you take money through PayPal's legacy Instant Payment Notification (IPN) — a Website Payments Standard button, a WooCommerce/Gravity Forms PayPal …
Multi-Tenant Stripe Connect Payments in a Go SaaS Platform
The problem We build Verify365, a white-label SaaS platform used by several law firms, each under its own brand. Every partner firm needs payments to …
Adding real payments to a Base44 app (3 insertion points, tested)
Disclosure up front: I'm Oded, co-founder of UniPaaS, the FCA-authorised Payment Institution (No. 929994) behind paas.build - so this is a vendor writ…
Paddle rejected my account. Here's the map of what actually works in 2026
Disclosure before anything else: I'm Oded, co-founder of UniPaaS, the FCA-authorised Payment Institution (No. 929994) behind paas.build, and we compet…
Self-hosting an x402 facilitator: the EIP-3009 gotchas that almost cost us money
We run DeskCrew , a helpdesk where AI agents can use support tools with no account and no API key — they pay per action in USDC over x402 , the HTTP-4…
Collect VietQR Payments in Telegram Bots with AgentPay
The Problem: Why Most Telegram Payment Bots Fail You've built a Telegram bot that sells digital courses, takes coffee orders, or offers freelance serv…
A stranger on Reddit suggested a guardrail for my payment MCP servers. It shipped to 30 countries in one day.
Last week I posted about a family of MCP servers that let AI agents accept payments — Pix in Brazil, UPI in India, GCash in the Philippines, PromptPay…
Why Agent Payment Security Is an Architecture Problem, Not a Monitoring Problem
This week, the AI agent economy got its first real security wake-up call. Researchers confirmed what many feared: AI agents are being successfully com…
Building Sluice: A Settlement Layer for the Agent-Paid Web
The web was designed around human visitors, subscriptions and advertising. AI agents operate differently. They search, retrieve, compare, cite, call A…
Selling to AI agents: what merchants need to know about x402 checkout, mandates, and chargeback-free settlement
If you're building a platform that sells digital goods, API access, data subscriptions, or any service an AI agent might buy programmatically, you've …
The Giants Are Here (And They Brought the Wrong Tools)
Mastercard launched agent-to-agent payments this week. Circle's co-founder raised $30M for Catena Labs and is filing for a national bank charter. Meta…
Your card keeps getting declined by US dev tools. Here is what is actually happening
TL;DR: SaaS declines outside the US are almost always a risk decision, not a balance problem. Fix the billing address first, then use a card built for…
Stripe-connect-reckon – a read-only monitor for Stripe Connect balance risk
I worked on a marketplace where a connected account went negative, Stripe suspended its payouts, and refunds silently queued as pending — no error, no…
What to check before adding crypto checkout to a merchant app
Affiliation note: I work with MakePay, so the MakePay example below is affiliated. This article was prepared with AI assistance and reviewed before po…
Stripe vs Paddle vs Lemon Squeezy for Indie Developers
Originally published on the Keylight blog . If you are an indie developer about to charge for an app, you have three names in front of you: Stripe, Pa…
How I add Polar (Merchant of Record) + Stripe to any Next.js app in 10 minutes — without an SDK
If you're a solo dev outside the US, "just add Stripe" is rarely just. Stripe doesn't onboard sellers directly in a lot of countries, so you reach for…
Clawing back affiliate commissions when a customer refunds: design the ledger first
You pay an affiliate 30% for referring a customer. Three weeks later that customer refunds. Now the affiliate is holding a commission on a sale that n…
Crypto Payment Statuses: A Backend Guide for Stablecoin Checkout
The transaction itself is only the beginning. The real backend complexity starts when your system needs to decide what happens next. Your backend may …
The AI Agent Payment Wars Have Begun — Here's What Actually Matters
Visa announced this week that AI agents can now use credit cards. Mastercard launched a protocol for AI-to-AI payments and micropayments. Catena Labs …
Payments startup Flutterwave hits $3.2B valuation, backed by Ripple
African payments infrastructure company Flutterwave has hit a new valuation and landed blockchain company Ripple as investor and partner.
Every Stripe decline code, what it actually means, and whether retrying will help
When a card payment fails in Stripe, you get a short string back — insufficient_funds , do_not_honor , authentication_required . Most teams glance at …
Migrating to x402 v2: what actually changed (and the traps nobody documents)
We run FiatDock — a non-custodial USDC ↔ bank on/off-ramp where AI agents pay $0.05 per call over x402. This week we migrated the whole stack (Express…
How my AI agent cashes out its USDC earnings to a bank account
My agent earns USDC. It sells API calls priced with x402 , so tiny payments accumulate in its wallet. Which eventually raises the unglamorous question…
Integrating Webpay Plus into a modern stack
If you've ever worked on an e-commerce project in Chile, sooner or later you bump into Transbank. There's no avoiding it. I built a reference template…
Revolut rolls out services to thousands of users in India ahead of broader launch
The British fintech has built a waitlist of about 450,000 users in India as it prepares for a broader launch.
Your Agent Made a $500 Mistake. Who Pays?
Last month, American Express did something no other financial institution has done: they promised to cover losses when AI agents make purchasing error…
Payment Provider Profiles for Agent Task Markets
Task-market agents can discover a job, check the reward, accept, submit, and settle. The part most payment-primitive discussions still hide is the pro…
Robinhood now lets your AI agents trade stocks
Robinhood will let users create a separate account with pre-loaded balance that an agent use to trade
PayPal Alternatives for Indian Businesses: Best Payment Gateways for International Card Payments (2026)
India's cross-border digital commerce has expanded significantly over the past three years. Software exports, D2C brands shipping internationally, Saa…