# Federal Register PFAS Regulatory Changes Feed

> Federal Register PFAS Regulatory Changes Feed is a paid API for AI agents from oracles-production.up.railway.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Returns Federal Register final and proposed rules related to PFAS ('forever chemicals') since a given timestamp, each scored 1-10 for compliance impact, with effective dates and source links.

## Facts

- Endpoint: GET https://oracles-production.up.railway.app/v1/reg-pfas/changes
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/federal-register-pfas-regulatory-changes-feed-a18090f4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4Rbv30PuK49Lu0ad3hliY

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 federal-register-pfas-regulatory-changes-feed-a18090f4
```

Example prompt: Pull all Federal Register PFAS forever-chemicals rules published since 2025-01-01T00:00:00Z that have a compliance significance score of at least 7, and show me up to 50 results with their effective dates and source links.

## When to prefer this

Use this endpoint when you need machine-readable, scored, and timestamped PFAS-specific regulatory changes from the Federal Register — particularly for compliance monitoring pipelines, regulatory alerting systems, or automated compliance gap analysis. Prefer it over the companion digest endpoint when you need structured data (scores, effective dates, source URLs) rather than a human-readable narrative summary.

## Known failure modes

- Invalid or missing 'since' date-time format returns a 400 error
- min_significance or limit values outside allowed ranges (1-10, 1-500) return validation errors
- No matching changes in the time window returns an empty changes array with count 0
- Payment not fulfilled triggers a 402 Payment Required response
- Upstream Federal Register data unavailability may cause 503 or delayed results

## How this service works

Federal Register final & proposed rules affecting PFAS 'forever chemicals' (Environmental Protection Agency) since a timestamp — covering pfas, perfluoro, polyfluoro, pfoa, pfos — each scored 1-10 for compliance impact, with effective dates and primary-source links.

## Output

A JSON object containing a count of matching changes and an array of regulatory change records, each with: document title, type (final/proposed rule), summary, significance score (1-10), effective date, detection timestamp, entity ID, and a primary-source URL linking to the Federal Register document.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "limit": {
       "type": "integer",
       "maximum": 500,
       "minimum": 1
      },
      "since": {
       "type": "string",
       "format": "date-time",
       "description": "Only changes detected after this ISO-8601 instant"
      },
      "min_significance": {
       "type": "integer",
       "maximum": 10,
       "minimum": 1,
       "description": "Keep only changes scored at least this"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "count": {
       "type": "integer"
      },
      "source": {
       "type": "string"
      },
      "changes": {
       "type": "array",
       "items": {
        "type": "object",
        "properties": {
         "type": {
          "type": "string"
         },
         "title": {
          "type": "string"
         },
         "detail": {
          "type": "object"
         },
         "summary": {
          "type": "string"
         },
         "entityId": {
          "type": "string"
         },
         "sourceUrl": {
          "type": [
           "string",
           "null"
          ],
          "description": "Primary-source link for verification"
         },
         "detectedAt": {
          "type": "string",
          "format": "date-time"
         },
         "significance": {
          "type": "integer",
          "maximum": 10,
          "minimum": 1
         },
         "effectiveDate": {
          "type": [
           "string",
           "null"
          ]
         }
        }
       }
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/federal-register-pfas-regulatory-changes-feed-a18090f4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from oracles-production.up.railway.app](https://www.zero.xyz/host/oracles-production.up.railway.app/llms.txt)