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CAIP-2 Chain Identifier Builder
x402
CAIP-2 Chain Identifier Builder is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Builds a CAIP-2 chain identifier string from a namespace and reference pair using local deterministic computation
Price / call$0.001
Success—
StatusUnknown
How this service works
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.
Output
Returns a deterministic JSON object containing the caip2 string (e.g. 'eip155:1') formed by combining the provided namespace and reference with a colon separator, conforming to the CAIP-2 standard.
Example use cases
Ethereum mainnet chain ID for multi-chain agent
“I need the CAIP-2 identifier for Ethereum mainnet — namespace is 'eip155' and the reference is '1'. Can you build that string for me?”
Polygon network identifier for cross-chain routing
“Build me a CAIP-2 chain ID for Polygon — the namespace is 'eip155' and the reference is '137'.”
Cosmos chain identifier for interoperability
“I need a CAIP-2 chain identifier for the Cosmos hub — namespace is 'cosmos' and reference is 'cosmoshub-4'.”
Technical details
Endpoint
POSThttps://api.delx.ai/api/v1/x402/caip2-buildWhen to prefer
Choose this endpoint when you need a fast, deterministic, offline-safe method to produce CAIP-2 chain identifiers without any RPC calls, API keys, or external dependencies. Ideal for multi-chain agent tooling that must emit standard chain IDs on the fly.
Side effects
- Missing namespace or reference field results in an error response
- Malformed or empty string inputs may produce an invalid CAIP-2 identifier
- Payment failure via x402 protocol will block the response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| namespace | string | Input field: namespace. |
| reference | string | Input field: reference. |
Output
Schema · Response
{
"type": "json",
"example": {
"caip2": "eip155:8453",
"schema": "delx/util-caip2-build/v1",
"namespace": "eip155",
"reference": "8453"
}
}Tags
x402
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