# Lilambd Rules Ahead — Topics List

> Lilambd Rules Ahead — Topics List is a paid API for AI agents from api.lilambd.com, paid per call via x402, $0.5/call, status unknown (last checked 2026-11-04).

Returns a list of regulatory topics with counts of open public comment periods and pending rules in Japan and the US

## Facts

- Endpoint: GET https://api.lilambd.com/rules-ahead/topics?utm_source=zero.xyz
- Price: $0.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-11-04
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/lilambd-rules-ahead-topics-list-49c2395e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jWJvn3KdtaXhAZEx54sqq

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-rules-ahead-topics-list-49c2395e
```

Example prompt: Can you show me which regulatory topics are currently being tracked for open public comment periods and pending rules in Japan and the US, so I can decide which one to drill into?

## When to prefer this

Use this endpoint as a discovery step before querying a specific regulatory topic; it provides the authoritative list of available topic slugs and a cross-jurisdictional summary of regulatory activity counts. Prefer it when you need to enumerate available topics, compare activity across policy areas, or identify which topics are most time-sensitive for public comment in Japan or the US. Not suitable for fetching full rule text or detailed comment content.

## Known failure modes

- Payment not sent or insufficient — HTTP 402 returned requiring x402 payment
- Upstream government APIs (e-Gov, Federal Register) unavailable — stale or empty data returned
- No topics currently have activity — empty data array returned
- Rate limiting or access errors from underlying data sources — partial results

## How this service works

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

## Output

A JSON array of regulatory topic objects, each with a topic slug, human-readable label, example query path, and counts of open comment periods, recent results, and not-yet-in-force rules broken down by jurisdiction (Japan and US), plus a total_ahead count and an attribution string citing data sources and fetch date.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "required": {
   "type": "string"
  },
  "properties": {
   "type": "string"
  },
  "additionalProperties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": [
   {
    "jp": {
     "comment_open": 3,
     "recent_results": 2,
     "not_yet_in_force": 0
    },
    "us": {
     "comment_open": 2,
     "not_yet_in_force": 2
    },
    "label": "Building, construction, housing",
    "topic": "building",
    "example": "/answer?topic=building",
    "total_ahead": 7
   }
  ],
  "attribution": "Sources: e-Gov Public Comment (public-comment.e-gov.go.jp), e-Gov Law Search API (laws.e-gov.go.jp), US Federal Register API (federalregister.gov). Fetched 2026-11-03. Status, days_left, topic matching and counts computed by Lilambd on 2026-11-03. Not legal advice."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/lilambd-rules-ahead-topics-list-49c2395e/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)