# lilambd crossing — kinds/chain lookup

> lilambd crossing — kinds/chain lookup is a paid API for AI agents from api.lilambd.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-11-02).

Fetches a chain or sequence of conceptual kinds/states by ID from the lilambd crossing API

## Facts

- Endpoint: GET https://api.lilambd.com/kinds/chain?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/lilambd-crossing-kinds-chain-lookup-8dde56ba
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QtXPWqtYm4PQSrh8lgZIz

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 lilambd-crossing-kinds-chain-lookup-8dde56ba
```

Example prompt: Can you fetch the lilambd kinds chain for ID 'liminal-dusk-7' and show me what states and attribution come back?

## When to prefer this

Use this endpoint when you specifically need to retrieve a chain or sequence of conceptual/experiential kinds from the lilambd crossing platform by a known chain ID. It is the right choice when you have a specific chain identifier and want its associated data array, item count, and source attribution. Not suitable for open-ended search or generation — requires a known ID.

## Known failure modes

- Missing or invalid 'id' query parameter returns an error or empty result
- Unknown chain ID returns data: [] with count: 0
- Rate limiting or payment failure (x402 protocol) blocks access
- Malformed request without required queryParams structure returns 4xx

## How this service works

A crossing for play, feeling, language, science and computation — creating states that do not have names yet.

## Output

Returns a JSON object containing a 'data' array of chain items (kinds/states), a 'count' integer indicating how many items are in the chain, and an 'attribution' string with the source licence line for the returned data.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "queryParams"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "id"
     ],
     "properties": {
      "id": {
       "type": "string",
       "description": "id (string)"
      }
     },
     "additionalProperties": {
      "type": "string"
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": [],
  "count": 0,
  "attribution": "source licence line"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/lilambd-crossing-kinds-chain-lookup-8dde56ba/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.lilambd.com](https://www.zero.xyz/host/api.lilambd.com/llms.txt)