InputPOST /api/v1/x402/tx-hash-format-check
{
"tx_hash": "0xabababababababababababababababababababababababababababababababab"
}Local chain primitives · chain-primitives-local
Tx Hash Format Check
Validate 0x + 64 hex transaction hash shape. Call when preflight before receipt lookup. Returns valid boolean as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.
One-command purchase
Run it from an agent.
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/tx-hash-format-check -m POST -H 'x-delx-source: product-page' --max-amount 0.001 -b '{"tx_hash":"0xabababababababababababababababababababababababababababababababab"}'Delivered resultapplication/json
{
"schema": "delx/util-tx-hash-format-check/v1",
"valid": true
}Machine-readable evidence