NO API KEY · X402 V2 · BASE MAINNET · USDC

Build an AI agent that can buy data.

Connect SCRIPTMASTERLABS, discover a capability, receive an HTTP 402 challenge, pay in USDC on Base, and receive the requested result with payment and provenance evidence. No account ceremony. No invented success claims.

OPEN SML DEVELOPER NETWORKOPEN INTERACTIVE X402CONNECT REMOTE MCPGET A REAL 402 CHALLENGE
REQUEST402 CHALLENGESIGNVERIFYSETTLEDELIVERPROVE

Framework quickstarts

Pick the architecture closest to your agent and copy the MCP/payment boundary pattern.

LangChain / LangGraph

Tool discovery plus an explicit policy node before signing or spending.

Open quickstart →

CrewAI / AutoGen

Separate scout, evaluator, buyer and verifier roles so discovery never silently becomes payment.

Open quickstart →

Eliza / onchain agents

Base-mainnet USDC purchase flow with bounded wallet mandates and settlement verification.

Open quickstart →

Start with four machine services

Resolve live price and payment terms from the current x402 challenge immediately before payment.

Domain Enrich

Machine-readable domain context.

Live contract →

Web Extract

One-shot extraction for agent workflows.

Live contract →

FX Convert

Low-cost path for testing the x402 rail.

Live contract →

Geo / Cities

Machine-accessible geospatial capability.

Live contract →

AGENTROUTES

Free intent-to-capability discovery. It does not auto-spend.

Discover →

x402 ECHO

Observed market intelligence, usage and provenance.

Live JSON →

Connect the remote MCP

Use the canonical remote MCP endpoint as the tool surface. Keep signing and spend policy inside your own wallet boundary.

https://squeezeos-api.onrender.com/mcp
{
  "mcpServers": {
    "scriptmasterlabs": {
      "command": "npx",
      "args": ["-y", "@scriptmasterlabs/mcp-x402"]
    }
  }
}

The proof trail is part of the product

A local 402 response is not a payment. A signature is not a settlement.

Truth boundary: request → payment requirement → signed authorization → facilitator verification → settlement evidence → accepted delivery. Unknown stays unknown. Unverified stays unverified.

Payment discovery

/.well-known/x402 →

Readiness evidence

/api/x402/readiness →

Settlement evidence

/api/x402/evidence →

Machine-readable first

Developer manifest

/.well-known/developers.json

Network manifest

/.well-known/developer-network.json

AI discovery

llms.txt · agents.json

Interactive developer experience: https://x402.scriptmasterlabs.com/developers · controlled public mirror: https://www.scriptmasterlabs.com/developers