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World Congress 2026 Europe • Jul 10, 2026 • Session details

HTTP 402: Teaching the Web to Let Agents Pay

Ed Marquez

How can autonomous AI agents securely bypass human paywalls? Discover how resurrecting the HTTP 402 protocol unlocks true pay-as-you-go micropayments for machine-to-machine commerce.

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#1 about 3 min

The problem of AI agents encountering traditional API paywalls

Current payment infrastructure assumes human interaction, causing agents to freeze when fetching paywalled resources.

#2 about 3 min

Defining agentic commerce and its industry adoption landscape

Major financial and technology companies are building frameworks to support machines transacting as economic actors.

#3 about 5 min

Why bank accounts and credit cards fail for autonomous agents

Direct financial access leads to uncontrolled spending, vulnerability to prompt injection, and incompatible subscription models.

#4 about 1 min

Introducing the X402 protocol and its core architectural components

An open standard activates the unused HTTP 402 code to enable machine-native cryptocurrency micro-transactions.

#5 about 2 min

Executing an X402 transaction sequence over HTTP

The payment interaction loop allows a client to retry rejected requests with an attached authorization signature.

#6 about 2 min

Creating payment payloads using transfer with authorization

Agents construct JSON payloads reflecting off-chain authorizations to spend digital dollars without directly paying gas fees.

#7 about 2 min

Understanding the trust model of non-custodial network facilitators

Middlemen verify and settle transactions on-chain without holding custody of user funds or risking manipulation.

#8 about 3 min

Implementing X402 payment middleware for providers and clients

Developers can adopt chain-agnostic wrappers to gate endpoints with required fees and seamlessly sign outgoing requests.

#9 about 3 min

Essential guarantees for an autonomous agent settlement layer

Predictable sub-cent fees, fast deterministic finality, and cryptographically verifiable audit logs establish reliable infrastructure.

#10 about 2 min

Real-world examples of monetizing APIs with agentic payments

Companies like CoinGecko and Cloudflare are already leveraging stablecoins to sell raw data per request.

#11 about 3 min

Complementary protocols in the expanding agentic commerce stack

The core payment structure integrates with emerging standards for identity, reputation, and decentralized marketplace discovery.

#12 about 2 min

Handling security and fraud detection for agent-driven paywalls

Robust on-chain analytics and structured wallet policies protect automated agent endpoints from malicious usage patterns.

Matching moments

10:56 min

Monetizing autonomous agent interactions with HTTP 402 payments

Coffee With Developers

2:47 min

Transitioning toward autonomous agentic commerce

Annabella Bassler Annabella Bassler +3 · World Congress 2026 Europe

1:17 min

Implementing usage-based pricing through monetization gateways

Brian Whippo Brian Whippo · World Congress 2026 Europe

4:50 min

Preparing for autonomous interactions and protocol-level stablecoin payments

Chris Heilmann +2 · LIVE

5:46 min

Funding agent capabilities using machine-to-machine microtransactions

Benjamin Smith Benjamin Smith · World Congress 2026 Europe

1:50 min

Adoption and metrics of the X402 payment protocol

Brian Whippo Brian Whippo · World Congress 2026 Europe

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