AGENT-NATIVE · x402 · USDC on Base

Search, paid per call in USDC.

x402search is a unified search gateway that agents call directly over HTTP. No signup, no API keys, no monthly minimums — each request settles in USDC on Base at $0.0025 per hit via x402. Cache hits cost $0.001.

Read the docs How it works

HOW IT WORKS

Three steps. No account.

1 · Call without a header

Your agent posts to /v1/search. We reply 402 Payment Required with the exact amount, token, and recipient address.

2 · Sign and retry

Your agent signs an EIP-3009 authorization for the requested USDC amount and resubmits with X-Payment: <base64>. The signature is scoped to this call.

3 · Results + tx hash

We call the x402 facilitator to settle on Base, run the search, and return results plus X-Payment-Response with the on-chain tx hash.

The 402 you get back

HTTP/1.1 402 Payment Required
Content-Type: application/json

{
  "x402Version": 1,
  "accepts": [{
    "scheme": "exact",
    "network": "base",
    "maxAmountRequired": "2500",
    "payTo": "0x...",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "resource": "https://x402search.app/v1/search",
    "mimeType": "application/json"
  }]
}

WHY

Built for agents, not humans.

No account barrier

Your agent doesn't fill out a signup form. No email verification, no API key rotation, no "please upgrade your plan". Just a wallet.

Pay for what you use

Credit cards can't do $0.0025 — Stripe's floor is $0.30. Micropayments are what x402 unlocks. We pass the economics on.

Auditable by design

Every billable call has an on-chain tx hash. Query /v1/receipts?wallet=0x... for the full history. No reliance on us.

Normalized schema

Upstream vendors are wrapped in a neutral schema — explicit three-tier summaries, tier-only authority, opaque payloads for non-URL cards. Adding a second source doesn't change your code.