# x402 Statistics — Protocol Adoption Metrics API

> x402 Statistics — Protocol Adoption Metrics API is a paid API for AI agents from x402stats.io, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).

Returns wash-filtered daily time-series and snapshot statistics for x402 protocol adoption including payment volume, active buyers/sellers, transactions, and facilitator market share across chains.

## Facts

- Endpoint: GET https://x402stats.io/api/x402/stats
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-statistics-protocol-adoption-metrics-api-e7b6597b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gX_0pky0cKLN3cto63V8i

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 x402-statistics-protocol-adoption-metrics-api-e7b6597b
```

Example prompt: Pull the latest x402 protocol stats for me — I want to see daily volume, how many organic sellers are active, and the current snapshot figures with the methodology version used to filter wash trades.

## When to prefer this

Choose this endpoint when you need independent, wash-filtered x402 protocol adoption metrics with a published methodology — especially for monitoring organic growth, facilitator competition, or building dashboards that need trustworthy time-series data. Prefer this over raw on-chain queries when you want pre-aggregated, validated metrics without implementing your own wash-trade filtering.

## Known failure modes

- Invalid or unrecognized query parameters may return empty or malformed results
- Service unavailable if x402stats.io infrastructure is down (503)
- Stale data if the daily pipeline has not yet completed for the current date
- Payment of 0.005 USDC per call required — missing or invalid x402 payment header will result in 402 Payment Required
- Methodology version mismatch if consumer assumes a fixed schema across versions

## How this service works

Independent x402 protocol adoption statistics: daily payment volume, active sellers, buyers, and facilitator market share across every chain — wash-filtered organic metrics with published methodology. Free CSV & JSON.

## Output

Returns a JSON object with a 'series' array of daily data points (date, buyers, sellers, volumeUsd, transactions), a 'snapshot' object with cumulative totals (volumeUsd, organicSellers, organicVolumeUsd), the last updated timestamp, and a methodologyVersion string indicating the wash-filter rules applied. Data is available as both JSON and CSV.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "series": [
   {
    "date": "2026-07-01",
    "buyers": 3152,
    "sellers": 648,
    "volumeUsd": 4100.12,
    "transactions": 50472
   }
  ],
  "snapshot": {
   "volumeUsd": 965926,
   "organicSellers": 173,
   "organicVolumeUsd": 432169
  },
  "updatedAt": "2026-07-01T00:00:00Z",
  "methodologyVersion": "2026-07-01.v1"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-statistics-protocol-adoption-metrics-api-e7b6597b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402stats.io](https://www.zero.xyz/host/x402stats.io/llms.txt)