# Delx Chain Id Lookup

> Delx Chain Id Lookup is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13).

Looks up a static mapping from a numeric chain ID or network slug to its canonical network name, with no live RPC call required.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/chain-id-lookup
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-chain-id-lookup-d28c46cb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dzGi38jfDbQZn6rrhZDrm

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-chain-id-lookup-d28c46cb -d '<json body>'
```

Example prompt: What is the network name for chain ID 8453? I need to map this chain ID to its canonical blockchain network name without making any live RPC calls.

## When to prefer this

Choose this endpoint when you need a fast, deterministic, no-RPC mapping from a chain ID to a network name for input validation or display purposes. Prefer it over live RPC calls when you only need the name and do not require current chain tip data. It is ideal for sanitizing user-supplied chain IDs in pipelines where latency and cost matter and live connectivity is unnecessary.

## Known failure modes

- Unknown or unsupported chain ID returns an error or empty result
- Invalid input format (non-numeric, unrecognized slug) may return a validation error
- Payment failure via x402 on Base prevents execution
- The static table may not include newly launched or obscure chains

## How this service works

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, stateless, and memory-only with no paid upstream, no input retention, and no claim of live chain tip, web…

## Output

Returns a deterministic, machine-readable JSON object containing the canonical network name and associated metadata for the given chain ID or network slug. The response is static and local — no live chain tip or RPC state is included.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "chain_id": {
   "type": "string",
   "description": "Numeric chain id string (e.g. 8453) or known network slug."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "found": true,
  "schema": "delx/util-chain-id-lookup/v1",
  "network": "base",
  "advisory": "Static table only; not chain tip or RPC state.",
  "chain_id": "8453",
  "live_rpc": false,
  "table_size": 10
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-chain-id-lookup-d28c46cb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)