InputPOST /api/v1/x402/caip2-build
{
"namespace": "eip155",
"reference": "8453"
}Local chain primitives · chain-primitives-local
CAIP-2 Build
Build CAIP-2 chain identifiers from namespace and reference. Call when emitting standard chain IDs for multi-chain agent tooling. Returns caip2 string 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/caip2-build -m POST -H 'x-delx-source: product-page' --max-amount 0.001 -b '{"namespace":"eip155","reference":"8453"}'Delivered resultapplication/json
{
"schema": "delx/util-caip2-build/v1",
"caip2": "eip155:8453",
"namespace": "eip155",
"reference": "8453"
}Machine-readable evidence