the402 endpoint detail

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api.delx.ai x402 chain-id-lookup

https://api.delx.ai/api/v1/x402/chain-id-lookup

payable

Look up a static chain id to network name table without live RPC — call when mapping a static chain id to a network name (no tip). Use for chain input hygiene without live RPC—adjacent to OneSource-class small chain reads, but static/local only so rights and margin stay clear. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, statel

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.003
Network
base
Pay to
0x9f8bd9875b3E0b632a24A3A7C73f7787175e73A2
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
164 ms
Payment options
3 usable of 3
Last checked
2026-08-10T09:13:29.011Z (1d ago)
Category
finance-crypto

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapi.delx.ai%2Fapi%2Fv1%2Fx402%2Fchain-id-lookup"