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httppayai

DevX x402 Preflight

x402 preflight: before your agent signs a payment, fetch a paywalled URL's 402 and lint it. Parses v1 bodies and v2 PAYMENT-REQUIRED headers, then checks each accepts[] option: known network, canonical USDC, EIP-712 domain (extra.name/version) that a signature will verify against, EIP-55 payTo, zero/contract payTo, amount sanity, timeout, testnet, resource-host mismatch. Returns ok/warn/block per option, findings and the recommended option.

Resource URL

https://x402-preflight.nextill-pos.workers.dev/v1/preflight

Payment options

exactBase (8453)

$0.003 USDC

Max amount

Pay to
0xB3cDDccEe6B150c8efFD55B961afc0Ecefe7f247
Timeout
120s

Tags

x402paymentssecurityagents

For agents

Prompt snippet for AI agents

Find and pay for this x402 resource:
URL: https://x402-preflight.nextill-pos.workers.dev/v1/preflight
Type: http
Sources: payai

Developer