World Congress 2025 • Aug 20, 2025 • Session details

402 - Payment Required

For three decades, the HTTP 402 status code remained an untouched placeholder. Today, autonomous AI agents are forcing developers to finally standardize this missing machine-to-machine payment protocol.

Starting at 14:46 · Watch from the beginning

402 - Payment Required thumbnail

Checking access…

Playback and chapters load privately for Free videos.

Matching moments

8:19 min

Enabling decentralized payments with HTTP 402 codes

Chris Heilmann

Chris Heilmann +2 · LIVE

4:34 min

History of the HTTP 402 payment required status

Brian Whippo

Brian Whippo · World Congress 2026 North America

10:56 min

Monetizing autonomous agent interactions with HTTP 402 payments

Coffee With Developers

3:12 min

Current state of the x402 protocol standardization

Brian Whippo

Brian Whippo · World Congress 2026 North America

58 sec

Introducing the X402 protocol and its core architectural components

Ed Marquez

Ed Marquez · World Congress 2026 Europe

1:32 min

History and intent behind the HTTP 402 status code

Brian Whippo

Brian Whippo · World Congress 2026 Europe

More from World Congress 2025

GenAI Security: Navigating the Unseen Iceberg thumbnail

GenAI Security: Navigating the Unseen Iceberg

Maish Saidel-Keesing · AWS

Behind the Code: How Women Are Powering the Future of AI thumbnail

Behind the Code: How Women Are Powering the Future of AI

Alexandra Wudel +2

The AI Hype Filter: What’s Real, What’s Investable, What’s Noise? thumbnail

The AI Hype Filter: What’s Real, What’s Investable, What’s Noise?

Justus Lumpe +3

AI in Leadership: How Technology is Reshaping Executive Roles thumbnail

AI in Leadership: How Technology is Reshaping Executive Roles

Bernd Datler +3

The AI-Ready Stack: Rethinking the Engineering Org of the Future thumbnail

The AI-Ready Stack: Rethinking the Engineering Org of the Future

Alex Laubscher +3

AI Sovereignty: What Does It Take? thumbnail

AI Sovereignty: What Does It Take?

Boris Hecker +3

Upcoming sessions on this topic

What Did the Human Actually Approve? Binding Approval to AI Agent Actions

Chilarai M

Swytchcode Technologies Inc

CTO

Beware of Strangers Bearing Code: Open Source Trust in the Agent Era

Vikram Vaswani

Consultant

Build a Zero-Cost AI Agent in Your Browser

Aishwarya Mathuria

Adobe

Computer Scientist
Nishant Thakur

Adobe

Senior Computer Scientist

AI at the Door, Turning ‘Tech Debt Panic’ into ‘Tech Debt Repairs’

Prerit Munjal

Groupon

Senior Technical Product Manager

Your AI Agents Are Bleeding Tokens: Building a Runtime Cost Control Plane for LLMs

Aakriti Aggarwal

IBM Research

Research Engineer
Bhavishya Pandit

66degrees

Leading AI Innovation

Stop Counting Tokens, Start Making Them Count

Vicky Israni

GitHub

Senior Solutions Engineer

Related videos

200 OK: Payment settled, resource delivered thumbnail

200 OK: Payment settled, resource delivered

Brian Whippo · Algorand

World Congress Europe · 2026

HTTP 402: Teaching the Web to Let Agents Pay thumbnail

HTTP 402: Teaching the Web to Let Agents Pay

Ed Marquez · Hashgraph

World Congress Europe · 2026

x402: Building Pay-Per-Request APIs for AI Agents thumbnail

x402: Building Pay-Per-Request APIs for AI Agents

Brian Whippo · Algorand Foundation

World Congress North America · 2026

Web Scraping, AI Agents, and the Future of Open Source - Kevin Lewis (Apify) thumbnail

Web Scraping, AI Agents, and the Future of Open Source - Kevin Lewis (Apify)

Coffee With Developers · Jun 2026

Teaching agents to pay: what devs need to know thumbnail

Teaching agents to pay: what devs need to know

Benjamin Smith · Stripe

World Congress Europe · 2026

Your next customer won’t be human thumbnail

Your next customer won’t be human

Benjamin Smith · Stripe

World Congress North America · 2026

Related articles

BS

Ben Smith

E-Commerce in the Agentic Age: When "Buy" Becomes a Function Call

For more than thirty years, we’ve built online commerce around one simple assumption: the customer is human. Humans browse websites. They compare products, read reviews, add items to a shopping car...

3 months ago

A mockup of a UI, with a 'Buy' button in the centre and handwritten labels around it, one calling a function and the other saying "Will agents click this?"

CH

Chris Heilmann

WebMCP: Empowering Agents as First-Class Citizens of the Web

WebMCP is an exciting W3C proposal that just landed in Chrome Canary to try out . The idea is that you can use some HTML attributes on a form or register JavaScript tool methods to give agents di...

9 months ago

WebMCP: Empowering Agents as First-Class Citizens of the Web

AF

Algorand Foundation

From Hype to Code: Real Blockchain Use Cases for Developers

So you’ve wrapped your head around why blockchain exists . You’re on board with the concepts: decentralization, immutability, and trust-minimized infrastructure. But now comes the real question: Wh...

about 1 year ago

A question mark made up of connected blocks, representing a question related to blockchain

CH

Chris Heilmann

The Web We Broke (And Why AI Agents Are Paying the Price) - AgentCon Berlin

This is the accompanying post to the talk Chris Heilmann gave at AgentCon in Berlin on 19/05/2026, you can also see the slides and listen to it in this screencast: Thirty years of developer shortc...

6 months ago

Yahoo Pipes allowing you to remix HTML content

From learning to earning

Jobs that call for the skills explored in this talk.

Software Engineer, Platform Access L2

Beverly Hills, CA, United States

Starter $116k Remote YAML Okta Golang

Bank Platform Transformation - Integration Architect-Engineer - Sr Associate

Atlanta, GA, United States

Expert $77k–202k Apigee Mulesoft Api Gateway

Bank Platform Transformation - Integration Architect-Engineer - Sr Manager

Charlotte, NC, United States

Expert $124k–280k Api Gateway Google Cloud Data Analysis

Forward Deployed Engineer

San Francisco, CA, United States

$180k–237k Remote Ruby Restful APIs Software as a…

Digital Assets Crypto/BlockChain Senior Associate

Irvine, CA, United States

Expert $77k–202k Blockchain Tokenization Digital Assets

Bank Platform Transformation - Integration Architect-Engineer - Sr Associate

Tampa, FL, United States

Expert $77k–202k Apigee Mulesoft Api Gateway