Overview
S&P 500 index series with FRED primary and Yahoo fallback.
Protocol
x402
Price
$0.0080
Payment Asset
USD Coin
Payment Network
eip155:8453
Category
uncategorized
Provider
x402
Indexed
2026-03-28 21:49:20
Health
Status
healthy
Latency (p50)
170ms
Uptime (30d)
100.0%
Reliability Score
92/100
Last Checked
2026-03-29 02:13:47
Last Healthy
2026-03-29 02:13:47
Consecutive Failures
0
x402 Payment Validation
Payment Requirements
Valid
Asset Verified
Known USDC
Facilitator
—
Input Schema
{
"discoverable": true,
"method": "GET",
"queryParams": {
"limit": {
"description": "Max observations to return",
"type": "string"
}
},
"type": "http"
}
Output Schema
{
"data": {
"latest": {
"date": "2026-03-27",
"value": 5792.15
},
"seriesId": "SP500"
},
"source": "FRED API",
"success": true
}
Recent Health Checks
| Time |
Status |
HTTP |
Latency |
Error |
| 2026-03-29 02:13:47 |
healthy |
402 |
147ms |
|
| 2026-03-29 01:07:03 |
healthy |
402 |
162ms |
|
| 2026-03-29 00:05:13 |
healthy |
402 |
182ms |
|
| 2026-03-28 22:48:05 |
healthy |
402 |
170ms |
|