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Dexter is the platform for monetizing, discovering, and settling paid API usage with x402. It connects three core experiences:

• Merchants and developers monetizing APIs with the x402 SDK
• Users and agents paying for resources through OpenDexter
• Partners and chains integrating the Dexter facilitator across supported networks

Choose Your Path

How To Use These Docs

• If you want to monetize or protect an endpoint, start in Build With x402.
• If you want to pay for and evaluate APIs, start in Use Dexter.
• If you want to understand hosted vs local discovery/payment tools, start in OpenDexter Tools.
• If you want settlement infra and network support, start in Facilitator and Chains.
• If you want system internals, go to API and Architecture.

What Dexter Solves

The API economy still assumes signups, API keys, monthly billing, and credit cards. That breaks for agents and limits what merchants can monetize.

Dexter uses HTTP 402 + x402 + on-chain settlement so any compatible client can pay for any compatible endpoint — no account required.

How It Works

sequenceDiagram
    participant Client
    participant Server
    participant Facilitator
    participant Chain
 
    Client->>Server: GET /api/resource
    Server-->>Client: 402 Payment Required + requirements
    Client->>Client: Build and sign payment
    Client->>Server: GET /api/resource + X-PAYMENT header
    Server->>Facilitator: POST /settle (payment + requirements)
    Facilitator->>Chain: Submit transaction
    Chain-->>Facilitator: Confirmed
    Facilitator-->>Server: Settlement proof
    Server-->>Client: 200 OK + data

First Pages To Read

Supported Chains

Solana · Base · Polygon · Arbitrum · Optimism · Avalanche · SKALE

See the full network matrix for CAIP-2 identifiers and status.