Commercial operations analytics · commercial-operations
X402 Challenge Shape Check: X402 Challenge Shape Check checks required top-level fields in a caller-supplied payment challenge from bounded caller-supplied values without an external provider. Call X402 Challenge Shape Check before paying for or accepting an x402 or agent delivery assembled from caller-supplied challenge and result metadata. Returns contract-specific checks, normalized evidence, mismatch reasons, and an explicit acceptance or rejection status for X402 Challenge Shape Check as versioned deterministic JSON. Price: $0.001 USDC via x402 on Base. First-party, stateless, memory-only execution with no paid upstream, live RPC, web search, credentials, custody, signing, media generator, or input retention. Honest limit: Validates metadata only; it never settles payment, signs payloads, contacts a facilitator, refunds funds, or asserts on-chain truth. Advisory output only; the buyer owns authorization, payment policy, and production decisions.
One-command purchase
No account or API key. AgentCash reads the 402 challenge, pays no more than the declared cap, retries the request and returns the result.
npx agentcash@latest fetch https://api.delx.ai/api/v1/x402/x402-challenge-shape-check -m POST -H 'x-delx-source: product-page' --max-amount 0.001 -b '{"challenge":{"x402Version":2,"accepts":[{"network":"eip155:8453","asset":"USDC","amount":"1000","payTo":"0x1111111111111111111111111111111111111111"}]}}'{
"challenge": {
"x402Version": 2,
"accepts": [
{
"network": "eip155:8453",
"asset": "USDC",
"amount": "1000",
"payTo": "0x1111111111111111111111111111111111111111"
}
]
}
}{
"schema": "delx/util-x402-challenge-shape-check/v1",
"operation": "delivery_contract:x402_challenge_shape_check",
"status": "pass",
"result": {
"missing_fields": [],
"accept_count": 1,
"shape_valid": true
},
"evidence": {
"input_sha256": "62072ab7fce77c19843d604f1566016ce4dbe3ea291d11d208433c905228eeab",
"retained": false,
"external_calls": 0
}
}Machine-readable evidence