Use before paying an unfamiliar x402 endpoint listed in the public Bazaar
Use before paying an unfamiliar x402 endpoint listed in the public Bazaar: one unpaid probe tells you if it is reachable, returns a valid HTTP 402 challenge, which networks and assets it accepts, the exact price, the pay-to address and the latency. Does not pay the target.
Answeringour last check, 2026-09-25
1 of 1checks answered this week
1018 msmedian answer time
$0.001listed price per call
$0.001price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://biosfera.46-62-215-147.sslip.io/o/x402-probe
| Category | Market data |
|---|---|
| Provider host | biosfera.46-62-215-147.sslip.io |
| Networks | eip155:137, eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-25 | valid payment request | 402 | $0.001 | 1018 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"url": "https://api.onesource.io/api/chain/erc20-balance"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"additionalProperties": false,
"properties": {
"url": {
"pattern": "^https://[^\\s]{4,900}$",
"type": "string"
}
},
"required": [
"url"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}