QRBase
OtherPaid ping endpoints from QRBase on Base. GET /api/x402/ping (0.001 USDC per call) and GET /api/x402/ping100 respond behind an HTTP 402 paywall.
Pay from $0.001 to $100.00 in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.
ASSESSMENT
updated 2h agoEvidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.
reliability 100%
- uptime 24h
- 100%
- uptime 7d
- 100%
- uptime 30d
- 100%
- uptime 90d
- 100%
- response p95
- 984ms
- avg response
- 665ms
- total checks
- 47
compliance A (11/11)
11 of 11 x402 conformance checks pass. Full checklist below.
price $0.001 to $100.00 (p22 in Other)
- price (min)
- $0.001
- price (max)
- $100.00
- category percentile (min)
- p22 in Other
- category percentile (max)
- p94 in Other
- endpoints / prices
- 2 / 2
- model
- tiered
- stability
- 100%
risk clean
No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.
traction $0.005 30d · 3 buyers
- volume 30d
- $0.005
- buyers 30d
- 3
- settlements 30d
- 5
- last settlement
- 2026-07-15
- top buyer share
- 40% of 30d volume
- trend 7d vs 30d
- 0.86x the 30d daily rate
- networks
- eip155:8453
Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.
Top buyer share is a concentration signal, not part of the ranking score.
WHAT IT DOES
ai-derivedProvides a ping API service on the Base blockchain network
- category
- blockchain-ping
AI-generated summary. The measured data is never altered by it.
ENDPOINTS
| METHOD | PATH | DESCRIPTION | PRICE | NETWORK | ASSET |
|---|---|---|---|---|---|
| GET | /api/x402/ping | Ping - 0.001 USDC on Base | $0.001 | Base | USDC |
| GET | /api/x402/ping100 | Ping - 100 USDC on Base | $100.00 | Base | USDC |
REQUEST / RESPONSE EXAMPLE
An unpaid request to GET /api/x402/ping returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.
curl -i 'https://www.qrbase.xyz/api/x402/ping'
// 402 response (captured by monitor) · 2 payloads · click to expand
[
{
"error": "X-PAYMENT header is required",
"accepts": [
{
"tags": [
"API",
"Coinbase",
"USDC",
"CDP",
"x402"
],
"type": "http",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x07737A1fB3863202bcd3c7408b801EEd68604D39",
"scheme": "exact",
"network": "base",
"category": "API Access",
"metadata": {},
"mimeType": "",
"resource": "https://www.qrbase.xyz/api/x402/ping",
"description": "Ping - 0.001 USDC on Base",
"x402Version": 1,
"discoverable": true,
"outputSchema": {
"input": {
"type": "http",
"method": "GET"
},
"output": {
"type": "object",
"properties": {
"sender": {
"type": "string"
},
"message": {
"type": "string"
},
"success": {
"type": "boolean"
},
"x402Version": {
"type": "number"
},
"paymentTransaction": {
"type": "string"
}
}
}
},
"maxAmountRequired": "1000",
"maxTimeoutSeconds": 60
}
],
"x402Version": 1
},
{
"error": "X-PAYMENT header is required",
"accepts": [
{
"tags": [
"API",
"Coinbase",
"USDC",
"CDP",
"x402"
],
"type": "http",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x07737A1fB3863202bcd3c7408b801EEd68604D39",
"scheme": "exact",
"network": "base",
"category": "API Access",
"metadata": {},
"mimeType": "",
"resource": "https://www.qrbase.xyz/api/x402/ping100",
"description": "Ping - 100 USDC on Base",
"x402Version": 1,
"discoverable": true,
"outputSchema": {
"input": {
"type": "http",
"method": "GET"
},
"output": {
"type": "object",
"properties": {
"sender": {
"type": "string"
},
"message": {
"type": "string"
},
"success": {
"type": "boolean"
},
"x402Version": {
"type": "number"
},
"paymentTransaction": {
"type": "string"
}
}
}
},
"maxAmountRequired": "100000000",
"maxTimeoutSeconds": 60
}
],
"x402Version": 1
}
] UPTIME
RECENT CHECKS
OVER TIME
All charts share the 7d window selected here. Every series is also served as JSON at /api/v1/services/qrbase/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted).
Median across 2 endpoints. Use the selector to isolate one.
COMPLIANCE
11/11 checks pass · grade A- 402 payload captured
- accepts[] array present
- payTo address recoverable
- payTo at accepts[0].payTo (conformant shape)
- payTo is a valid on-chain address
- atomic price declared
- atomic price in a sane range
- asset (token) address declared
- network resolves to CAIP-2
- payment scheme declared
- served over HTTPS
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