Integrate d402

Integrate d402

Integrate d402

The AI-Friendly Payment Layer

Add instant 402 paywalls to agents, APIs, and MCP calls without keys or accounts, enabling autonomous payments, universal token support, and verifiable on-chain settlement.

Available on

Arbitrum

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Integrate d402

Integrate d402

What d402 Enables

What d402 Enables

What d402 Enables

Monetize your APIs

Charge per request using HTTP 402 with automatic settlement and no billing system to maintain

Agent payments

Allow autonomous agents to pay and earn directly on-chain without keys, accounts, or card rails

On-demand digital content

Unlock files, datasets, or inference outputs through simple pay-per-access instead of subscriptions

Machine services

Meter compute, IoT, or network utilization with low-cost, batched on-chain settlement verified by proof of execution

Monetize your APIs

Charge per request using HTTP 402 with automatic settlement and no billing system to maintain

Agent payments

Allow autonomous agents to pay and earn directly on-chain without keys, accounts, or card rails

On-demand digital content

Unlock files, datasets, or inference outputs through simple pay-per-access instead of subscriptions

Machine services

Meter compute, IoT, or network utilization with low-cost, batched on-chain settlement verified by proof of execution

What d402 Solve?

What d402 Solve?

What d402 Solve?

The Friction

The Friction

Fragmented Access: APIs sit behind inconsistent key systems and closed gateways, forcing custom integrations and manual credential handling

Agent Limitations: AI agents cannot discover services, pass KYC, or use credit-card billing flows, blocking autonomous machine-to-machine commerce

Rigid Payment Rails: Current 402 implementations rely on centralized or chain-specific infrastructure, preventing agents from acting as both clients and servers

The d402 Solution

Autonomous & Discoverable: Agents locate and invoke services through a public index using the IATP standard, with permissionless facilitators providing async on-chain settlement

Chain Agnostic: A universal 402 payment layer where servers and agents accept any token on any chain, configurable to any ecosystem’s preferred assets

Sovereign: Every agent and MCP server uses a self-custodied IATPWallet smart account, enabling verifiable execution, independent settlement, and true agent-to-agent commerce

d402 Advantages
and Features

d402 Advantages
and Features

d402 Scanner (marketplace)

d402 Scanner (marketplace)

Search, discover, and invoke transactions, MCP servers, and autonomous agents from a single unified index

Decentralized layer for agent-to-agent payments and verification

Any payment token supported

Any payment token supported

Accept USDC, ETH, or any ERC-20 when monetizing API calls, agent actions, or digital content

Permissionless on-chain settlement

Permissionless on-chain settlement

Batched transactions minimize cost and settle only when execution is provable, with no intermediaries and fully on-chain guarantees.

Transactions bundle to cut costs and only settle when execution is provable, completely on-chain

MCP server support

MCP server support

Wrap any API as a monetized MCP server instantly discoverable and callable by agents

d402 Scanner (marketplace)

Decentralized layer for agent-to-agent payments and verification

Any payment token supported

Accept USDC, ETH, or any ERC-20 when monetizing API calls, agent actions, or digital content

Permissionless on-chain settlement

Transactions bundle to cut costs and only settle when execution is provable, completely on-chain

MCP server support

Wrap any API as a monetized MCP server instantly discoverable and callable by agents

Coming Soon

Coming Soon

Multi-chain support

Multi-chain support

Accept and settle 402 payments in any ERC-20 across any EVM chain, with unified discovery and verification

Plug-and-play widget

Plug-and-play widget

Embed 402 paywalls directly into your application with minimal integration effort

A2A agent

A2A agent

Enable agents to autonomously call and compensate one another using cryptographically signed, on-chain receipts

Hashed dispute mechanism

Hashed dispute mechanism

Offer verifiable resolution frameworks where execution proofs determine fund release

Multi-chain support

Accept and settle 402 payments in any ERC-20 across any EVM chain, with unified discovery and verification

Plug-and-play widget

Embed 402 paywalls directly into your application with minimal integration effort

A2A agent

Enable agents to autonomously call and compensate one another using cryptographically signed, on-chain receipts

Hashed dispute mechanism

Offer verifiable resolution frameworks where execution proofs determine fund release

Comparison table

Comparison table

Questions, answered

Questions, answered

What is d402?

Who is this for?

How does it work?

What makes d402 different?

What can I accept as payment?

Do I need to change my existing code?

What is d402?

Who is this for?

How does it work?

What makes d402 different?

What can I accept as payment?

Do I need to change my existing code?

What is d402?

Who is this for?

How does it work?

What makes d402 different?

What can I accept as payment?

Do I need to change my existing code?

d402

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d402

Built by

[email protected]

•

Terms

•

Privacy

d402

Built by

[email protected]

•

Terms

•

Privacy