# Farelight Research – Daily Agent Payment Index

> Farelight Research – Daily Agent Payment Index is a paid API for AI agents from farelight.xyz, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-14).

Returns daily aggregated x402 agent payment statistics on the Arc network, classified by facilitator and methodology version, read directly from on-chain settlements.

## Facts

- Endpoint: GET https://farelight.xyz/api/v1/index/daily?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/farelight-research-daily-agent-payment-index-82f352b2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fY7ECbjRciCxFnn1TpwzB

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 farelight-research-daily-agent-payment-index-82f352b2
```

Example prompt: Pull the Farelight daily agent payment index for September 20–22 2026, using the public phase and USDC token, and show me total volume and payment counts broken down by facilitator.

## When to prefer this

Choose this endpoint when you need standardized, publicly versioned, on-chain-sourced daily aggregates of x402 agent payment activity on Arc — especially when you need facilitator-level breakdowns, reproducible methodology versioning, or trend data over a date range. Prefer it over raw blockchain queries when you want pre-classified 'agent' payment data with auditable methodology rather than raw transaction logs.

## Known failure modes

- Invalid or out-of-range date parameters return an empty data array or error
- Unsupported token or classification values may return no results
- Service may return stale data if chain indexing is delayed
- Rate limiting or payment failure (x402 $0.005 USDC per call) results in 402 response
- Unknown phase values may produce unexpected filtering behavior

## How this service works

Agent payments on Arc, measured in the open. Every x402 settlement, read from the chain and classified by public, versioned rules.

## Output

A JSON object containing an array of daily records, each with date, USDC volume, payment count, facilitator name, unique payees, unique payers, and classification label. Also includes the as_of timestamp, query parameters echoed back, the current classification run number, and the methodology version used to classify agent payments.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": [
   {
    "day": "2026-09-20",
    "volume": "0.150000",
    "payments": 3,
    "facilitator": "arcus",
    "unique_payees": 2,
    "unique_payers": 1,
    "classification": "agent"
   },
   {
    "day": "2026-09-20",
    "volume": "0.260500",
    "payments": 114,
    "facilitator": "circle",
    "unique_payees": 3,
    "unique_payers": 2,
    "classification": "agent"
   }
  ],
  "as_of": "2026-09-25T18:42:31.596Z",
  "params": {
   "to": "2026-09-22T00:00:00.000Z",
   "from": "2026-09-20T00:00:00.000Z",
   "phase": "public",
   "token": "USDC",
   "classification": "agent"
  },
  "classification_run": 131,
  "methodology_version": "v1.0"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/farelight-research-daily-agent-payment-index-82f352b2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from farelight.xyz](https://www.zero.xyz/host/farelight.xyz/llms.txt)