# AnswerPool Effective Date Calendar

> AnswerPool Effective Date Calendar 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 final federal rules taking effect within the next N days, sorted by effective date with exact day-counts, optionally filtered by agency.

## Facts

- Endpoint: GET https://answerpool.io/v1/regs/effective
- 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-effective-date-calendar-e7433e4e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rhPcPxKMepqGR5QCtZxaP

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-effective-date-calendar-e7433e4e
```

Example prompt: What final federal rules are taking effect in the next 45 days? Include only EPA rules and show up to 50 results, sorted by how soon they go into effect.

## When to prefer this

Choose this endpoint when you need a pre-sorted, day-count-annotated queue of final federal rules that are about to go into effect — especially when you want to avoid manual date math against the Federal Register or writing effective-date range queries. It is ideal for compliance monitoring workflows, regulatory calendars, and alerting systems that need to surface imminent obligations. Prefer it over general Federal Register search when the specific concern is 'what takes effect soon' rather than 'what was published recently' or 'what is open for comment.'

## Known failure modes

- Invalid agency slug format (must match ^[a-z0-9-]+$) returns 422 validation error
- within_days out of range (must be 1-180) returns 422 validation error
- limit out of range (must be 1-100) returns 422 validation error
- No rules found for the given filters returns empty documents array with count 0
- Payment not provided or insufficient USDC results in 402 Payment Required
- Agency slug provided but no matching agency exists returns empty result set

## 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 rule documents each containing: document number, title, type, action description, issuing agencies, publication date, effective_on date, days_to_effective integer, comments_close_on, significance flag, abstract, docket IDs, regulation ID numbers, CFR references, topics, Federal Register URL, and flags such as 'significant' or 'effective_soon'.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "title": "EffectiveSoonIn",
     "properties": {
      "limit": {
       "type": "integer",
       "title": "Limit",
       "default": 25,
       "maximum": 100,
       "minimum": 1,
       "description": "Maximum rules returned, soonest effective date first."
      },
      "agency": {
       "anyOf": [
        {
         "type": "string",
         "pattern": "^[a-z0-9-]+$",
         "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."
      },
      "within_days": {
       "type": "integer",
       "title": "Within Days",
       "default": 30,
       "maximum": 180,
       "minimum": 1,
       "description": "Rules taking effect within this many days."
      }
     },
     "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-effective-date-calendar-e7433e4e/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)