# Parallax x402 Economy Window Census

> Parallax x402 Economy Window Census is a paid API for AI agents from parallax402.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Returns a settler-frame census of the x402 micropayment economy for a specified UTC date window, including per-facilitator transaction counts, USDC volume, buyer/seller counts, unattributed residual, breadth, and scan coverage.

## Facts

- Endpoint: GET https://parallax402.com/v1/window
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/parallax-x402-economy-window-census-2fd8aa86
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hfO2wx4H4r8hpvODzu4nM

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 parallax-x402-economy-window-census-2fd8aa86
```

Example prompt: Pull the Parallax settler-frame census for the x402 economy from June 1 to June 30, 2026 — I want to see the daily USDC volume, transaction counts, attributed share, and coverage ratio.

## When to prefer this

Choose this endpoint when you need aggregate economic statistics for the x402 micropayment network over a multi-day window — particularly for trend analysis, reporting, auditing USDC flows, or monitoring network health over time. It is the canonical source for settler-frame census data derived from the x402 settlement graph, providing attribution and coverage metadata that raw blockchain queries lack. Prefer it over point-in-time or single-seller endpoints when the question is about macro-level network activity across all facilitators.

## Known failure modes

- Date range exceeds 31 days — request rejected
- 'to' date is today or in the future — only yesterday and earlier are available
- 'from' or 'to' not in YYYY-MM-DD format — parse error
- 'from' is after 'to' — invalid window
- Coverage ratio below 1.0 if some facilitator nodes failed during scan — partial data returned with failed count noted
- Missing required query parameters — 400 error

## How this service works

Settler-frame census of the x402 economy for any UTC window: per-facilitator txs, USDC, buyers and sellers, the unattributed residual, breadth, and coverage computed from the scan manifest.

## Output

A JSON envelope containing: an as_of timestamp, the settler frame identifier, a coverage object (ok count, failed count, ratio), attribution method, tier (e.g. 'full'), and a fact payload with one row per day (day, txs, USDC, purchases), summed totals across the window, a list of any missing days, the attributed share of txs and USDC, and the unattributed residual.

## 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",
    "queryParams"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "const": "GET"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "from",
      "to"
     ],
     "properties": {
      "to": {
       "type": "string",
       "description": "last UTC day of the window, YYYY-MM-DD, EXCLUSIVE; at most 31 days and no later than today UTC (so the newest sellable day is yesterday)"
      },
      "from": {
       "type": "string",
       "description": "first UTC day of the window, YYYY-MM-DD, inclusive"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type",
    "format"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "format": {
     "type": "string",
     "const": "application/json",
     "description": "the census envelope: as_of, frame, coverage, method, attribution, tier, and a fact carrying one row per day plus summed totals, the residual, the recomputed attributed share and the days that were missing"
    },
    "example": {
     "type": "object",
     "description": "a worked response, shortened — the shape a full answer has"
    }
   },
   "additionalProperties": false
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "format": "application/json",
 "example": {
  "fact": {
   "days": [
    {
     "day": "2026-08-25",
     "totals": {
      "txs": 12,
      "usdc": 16447.693817,
      "purchases": 15
     }
    }
   ],
   "totals": {
    "txs": 24,
    "usdc": 32895.387634,
    "purchases": 30
   },
   "days_missing": [],
   "attributed_share": {
    "txs": 0.75,
    "usdc": 0.999909
   }
  },
  "tier": "full",
  "as_of": "2026-08-26",
  "frame": "settler-eip3009-base",
  "coverage": {
   "ok": 86,
   "ratio": 0.977273,
   "failed": 2
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/parallax-x402-economy-window-census-2fd8aa86/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from parallax402.com](https://www.zero.xyz/host/parallax402.com/llms.txt)