# AnswerPool Significant Rule Tracker

> AnswerPool Significant Rule Tracker is a paid API for AI agents from answerpool.io, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Returns only OIRA-reviewed E.O. 12866 significant federal rules and proposed rules, newest first, with deadline flags and optional agency filtering.

## Facts

- Endpoint: GET https://answerpool.io/v1/regs/significant
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/answerpool-significant-rule-tracker-f852d7e1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Cm1nQolziAH-dChBQ2_fu

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 answerpool-significant-rule-tracker-f852d7e1
```

Example prompt: Show me the 10 most recent significant federal rules and proposed rules from the EPA, including any that have comment deadlines or effective dates coming up soon.

## When to prefer this

Use this endpoint when you need only the high-signal subset of federal rulemaking — specifically E.O. 12866 significant rules that have undergone OIRA review — rather than scanning the entire Federal Register firehose. It is ideal for compliance teams, policy analysts, and regulatory monitoring agents who need to track economically major rules with upcoming deadlines. Prefer it over a general Federal Register feed when you want pre-filtered significance, deadline flags, and per-agency scoping in a single call.

## Known failure modes

- Invalid agency slug format returns a validation error
- since date in wrong format returns a parse error
- limit outside 1-100 range returns a validation error
- No matching significant rules in the requested window returns count:0 and empty documents array
- Upstream Federal Register API unavailability may cause stale or failed responses

## How this service works

AnswerPool turns SEC EDGAR, the Federal Register, USAspending, NIH, BLS and OpenAlex into structured JSON answers that AI agents and developers fetch in one call. 69 endpoints free, no account; derived analyses $0.02–$0.05 per call by card credits or USDC (x402). MCP server, full provenance.

## Output

A JSON object with an as_of timestamp, total matching count, and an array of significant rule documents. Each document includes title, document number, type, action, issuing agencies, publication date, effective date, comment close date, significance flag, abstract, docket IDs, regulation ID numbers, CFR references, topics, URL, and computed deadline flags (days_to_effective, days_to_comment_close, flags array such as 'effective_soon' or 'final_rule_pending_effect').

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "title": "SignificantIn",
     "properties": {
      "limit": {
       "type": "integer",
       "title": "Limit",
       "default": 25,
       "maximum": 100,
       "minimum": 1,
       "description": "Maximum significant documents returned, newest publication date first."
      },
      "since": {
       "anyOf": [
        {
         "type": "string",
         "maxLength": 40
        },
        {
         "type": "null"
        }
       ],
       "title": "Since",
       "default": null,
       "description": "publication_date >= this ISO date, e.g. 2026-06-01. Default: the last 90 days."
      },
      "types": {
       "type": "string",
       "title": "Types",
       "default": "rule,proposed_rule",
       "description": "Comma-separated Federal Register document types: rule, proposed_rule, notice, presidential. An unlisted type is rejected. Default rule,proposed_rule."
      },
      "agency": {
       "anyOf": [
        {
         "type": "string",
         "pattern": "^[a-z0-9-]+$",
         "maxLength": 120
        },
        {
         "type": "null"
        }
       ],
       "title": "Agency",
       "default": null,
       "description": "Federal Register agency slug from /v1/regs/agencies, e.g. securities-and-exchange-commission; an unknown slug fails the call. Omit for all."
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "as_of": "2026-09-02T14:00:00Z",
  "count": 1,
  "documents": [
   {
    "url": "https://www.federalregister.gov/d/2026-12341",
    "type": "Rule",
    "flags": [
     "significant",
     "effective_soon",
     "final_rule_pending_effect"
    ],
    "title": "Cybersecurity Risk Management Rule",
    "action": "Final rule.",
    "topics": [
     "Securities"
    ],
    "abstract": "Requires registrants to disclose material cybersecurity incidents.",
    "agencies": [
     "Securities and Exchange Commission"
    ],
    "docket_ids": [
     "SEC-2026-001"
    ],
    "significant": true,
    "effective_on": "2026-09-12",
    "cfr_references": [
     "17 CFR 240"
    ],
    "document_number": "2026-12341",
    "publication_date": "2026-08-30",
    "comments_close_on": null,
    "days_to_effective": 10,
    "days_to_comment_close": null,
    "regulation_id_numbers": [
     "3235-AN00"
    ]
   }
  ],
  "total_matching": 1
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/answerpool-significant-rule-tracker-f852d7e1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from answerpool.io](https://www.zero.xyz/host/answerpool.io/llms.txt)