# Pharos Atlas Aquafiltration Review

> Pharos Atlas Aquafiltration Review is a paid API for AI agents from billing.pharosatlas.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-31).

Returns a structured editorial reference snapshot covering water filtration trade topics, including workflow steps, key questions, subject definitions, and provenance metadata.

## Facts

- Endpoint: GET https://billing.pharosatlas.com/api/x402/resources/aquafiltration-review?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/pharos-atlas-aquafiltration-review-1af922b1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Qq91YgO8ObN7deWvGIATs

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 pharos-atlas-aquafiltration-review-1af922b1
```

Example prompt: Pull up the Pharos Atlas aquafiltration review — I need the structured editorial reference with workflow steps, key diagnostic questions, and subject definitions for water filtration trade work, including provenance and source date.

## When to prefer this

Choose this endpoint when you need a structured, provenance-backed editorial reference for aquafiltration or water filtration trade topics — particularly when you need defined workflow steps, subject scope, diagnostic questions, and source citations in a single machine-readable payload. Prefer this over raw web scraping or general LLM knowledge when auditability, stated limitations, and a versioned snapshot identifier are required.

## Known failure modes

- Payment not received or x402 payment header missing — returns 402 Payment Required
- Invalid or expired payment token — returns 402 or 403
- Resource snapshot unavailable or deprecated — returns 404
- Malformed query parameters — returns 400 (no additional query params are accepted)
- Service downtime or upstream error — returns 5xx

## How this service works

Pharos Atlas provides structured editorial references for trade and blue-collar topics. Its paid x402 resources give researchers, developers, and AI agents defined reference material with stated scope, source context, and limitations. Each listing describes the specific resource being purchased.

## Output

A structured JSON object (schema: pharos.trade-review.v1) containing: a snapshot identifier, source date, language, product ID, workflow steps (ordered list of evaluation actions), diagnostic questions, subject definitions (e.g. sediment filtration explanations), safety notes, things to avoid, proof points, and full provenance metadata including source URL, release date, and SHA-256 hashes for auditability.

## 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",
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "schema",
      "product",
      "question",
      "language",
      "snapshot",
      "source_date",
      "site",
      "review",
      "subjects",
      "provenance"
     ],
     "properties": {
      "site": {
       "type": "object",
       "required": [
        "id",
        "domain"
       ],
       "properties": {
        "id": {
         "type": "string"
        },
        "name": {
         "type": "string"
        },
        "domain": {
         "type": "string"
        },
        "cluster": {
         "type": "string"
        },
        "intents": {
         "type": "array",
         "items": {
          "type": "string"
         },
         "minItems": 1
        },
        "summary": {
         "type": "object",
         "required": [],
         "properties": {
          "en": {
           "type": "string"
          }
         },
         "additionalProperties": false
        },
        "contexts": {
         "type": "array",
         "items": {
          "type": "string"
         },
         "minItems": 1
        },
        "subjects": {
         "type": "array",
         "items": {
          "type": "string"
         },
         "minItems": 1
        },
        "variables": {
         "type": "array",
         "items": {
          "type": "string"
         },
         "minItems": 1
        },
        "safetyBounded": {
         "type": "boolean"
        }
       },
       "additionalProperties": false
      },
      "review": {
       "type": "object",
       "required": [
        "questions",
        "workflow"
       ],
       "properties": {
        "home": {
         "type": "object",
         "required": [],
         "properties": {
          "lede": {
           "type": "string"
          },
          "points": {
        
… (truncated)
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "site": {
   "id": "aquafiltration",
   "domain": "aquafiltration.info"
  },
  "review": {
   "workflow": [
    "Obtain suitable source-water test results"
   ],
   "questions": [
    "Which measured substance or condition needs treatment?"
   ]
  },
  "schema": "pharos.trade-review.v1",
  "product": "aquafiltration-review",
  "language": "en",
  "question": "Which measured substance or condition needs treatment?",
  "snapshot": "pharos-aquafiltration-20261019-r1",
  "subjects": {
   "sediment-filtration": "Sediment filtration addresses suspended particles; a particle rating alone does not establish dissolved-contaminant or microorganism reduction."
  },
  "provenance": {
   "kind": "Pharos editorial release; no current site inspection or work authorization",
   "rights": "Single purchased snapshot for internal reference; no bulk redistribution, sublicensing or training license conferred.",
   "source_url": "https://aquafiltration.info/en",
   "source_release": "2026-10-19",
   "source_file_sha256": "41705f747704654b380bcde1d2dc976d46b007d330ccf7caf769cf3cd9e076c2",
   "source_projection_sha256": "6c2aba43e08295d14224d52fcfa3a743d5efc731d78cd06add9770db0f13edf2"
  },
  "source_date": "2026-10-19"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/pharos-atlas-aquafiltration-review-1af922b1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from billing.pharosatlas.com](https://www.zero.xyz/host/billing.pharosatlas.com/llms.txt)