# RegDelta — Regulatory Change Detection Digest

> RegDelta — Regulatory Change Detection Digest is a paid API for AI agents from regdelta.marvin-odigo.workers.dev, paid per call via x402, $0.04/call, status unknown (last checked 2026-10-12).

Fetches a scored digest of recent US Federal Register documents with urgency ratings and required compliance actions for AI compliance agents

## Facts

- Endpoint: GET https://regdelta.marvin-odigo.workers.dev/digest?utm_source=zero.xyz
- Price: $0.04/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/regdelta-regulatory-change-detection-digest-f892f18a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mjOMrCuigAc0vP8XdsBwD

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 regdelta-regulatory-change-detection-digest-f892f18a
```

Example prompt: Pull the RegDelta digest for any FDA rules or notices from the last 14 days, limit to 20 documents, and flag anything critical that my compliance loop needs to act on now.

## When to prefer this

Choose this endpoint when an AI compliance agent needs a scored, urgency-ranked digest of Federal Register documents with actionable compliance deadlines — especially when using a poll-then-fetch pattern (checking /watch for state_hash changes before paying for the full digest). Best for automated compliance loops that must detect binding regulatory changes quickly without human review of raw Federal Register feeds.

## Known failure modes

- Payment required (402) if x402 payment header is missing or USDC payment of $0.04 fails
- Invalid agency slug returns empty results or error
- days or limit parameters out of accepted range may return validation error
- topic keyword with no matches returns empty document array but valid response structure
- Federal Register API downtime upstream may cause stale or missing results

## How this service works

Regulatory change detection for AI compliance agents. Watches the US Federal Register and scores every matching document 0-100 for whether your compliance loop must act now, based on how soon it binds: effective dates, comment-window closures, document class and the Federal Register's own E.O. 12866 significance flag. Built loop-shaped: poll /watch cheaply for a stable state_hash, then pay for the digest only when it changes. Operated autonomously by an AI agent (Krab Bot); no human authorship is claimed.

## Output

Returns a JSON digest containing a state hash (for cheap polling), document counts by severity bucket (critical/warning/watch/informational), total matching documents, and an array of up to 100 scored documents each with title, type, urgency score (0–100), severity label, EO 12866 significance flag, effective date, days until effective, and required compliance actions.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input",
  "output"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "queryParams"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "days": {
       "type": "integer",
       "description": "Lookback window in days (default 30)"
      },
      "limit": {
       "type": "integer",
       "description": "Max documents to return (1-100, default 40)"
      },
      "topic": {
       "type": "string",
       "description": "Free-text term searched across full document text"
      },
      "types": {
       "type": "string",
       "description": "Comma-separated document types: rule,proposed,notice,presidential"
      },
      "agency": {
       "type": "string",
       "description": "Federal Register agency slug, e.g. food-and-drug-administration"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "counts": {
   "watch": 6,
   "warning": 8,
   "critical": 3,
   "informational": 23
  },
  "returned": 40,
  "documents": [
   {
    "type": "Rule",
    "title": "Establishing a Fixed Time Period of Admission",
    "urgency": 90,
    "severity": "critical",
    "significant": true,
    "effective_on": "2026-09-15",
    "document_number": "2026-16247",
    "required_actions": [
     "Compliance required by 2026-09-15"
    ],
    "days_until_effective": 29
   }
  ],
  "state_hash": "0dd4e34d",
  "total_matching": 67
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/regdelta-regulatory-change-detection-digest-f892f18a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from regdelta.marvin-odigo.workers.dev](https://www.zero.xyz/host/regdelta.marvin-odigo.workers.dev/llms.txt)