# Delx Commerce — CAIP-2 Identifier Builder

> Delx Commerce — CAIP-2 Identifier Builder is a paid API for AI agents from commerce.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).

Constructs a CAIP-2 chain identifier string from a namespace and reference component

## Facts

- Endpoint: POST https://commerce.delx.ai/api/v1/x402/caip2-build?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-commerce-caip-2-identifier-builder-9240d49a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6VVbTq_Kv9p0MamoZg1Qw

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability delx-commerce-caip-2-identifier-builder-9240d49a -d '<json body>'
```

Example prompt: Build me a CAIP-2 identifier using the namespace 'eip155' and the reference '8453' for the Base network.

## When to prefer this

Choose this endpoint when you need to programmatically construct a standards-compliant CAIP-2 chain identifier from its component parts (namespace + reference) without hardcoding strings. Especially useful in multi-chain agent workflows where dynamic chain resolution is needed, or when building interoperable cross-chain tooling that requires CAIP-2 format. At $0.001 USDC per call with no signup required, it's suitable for lightweight utility use in autonomous agent pipelines.

## Known failure modes

- Missing namespace or reference fields returns a validation error
- Invalid or unrecognized namespace may return an error or unexpected output
- Network or payment failure (x402) may result in no response or HTTP 402
- Malformed input types may cause schema validation errors

## How this service works

Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.

## Output

Returns a JSON object containing the fully assembled CAIP-2 chain identifier string (e.g. 'eip155:8453'), the namespace used, the reference used, and the schema version ('delx/util-caip2-build/v1').

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "namespace": {
   "type": "string",
   "description": "Input field: namespace."
  },
  "reference": {
   "type": "string",
   "description": "Input field: reference."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "caip2": "eip155:8453",
  "schema": "delx/util-caip2-build/v1",
  "namespace": "eip155",
  "reference": "8453"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-commerce-caip-2-identifier-builder-9240d49a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from commerce.delx.ai](https://www.zero.xyz/host/commerce.delx.ai/llms.txt)