Check an x402 niche before you build or buy
Check an x402 niche before you build or buy. Send {"query":"pdf to markdown"}. Returns matching bazaar listings and hosts, how many have outside paying buyers in the last 30 days, max and median unique payers, price quartiles overall and among listings with demand, top listings and hosts by payers, and a verdict: empty, no-demand, thin-supply, contested, or incumbent-dominated. From Coinbase discovery metrics, refreshed every 6 hours.
Not tested: has real-world effectsour last check, 2026-09-24
0 of 0checks answered this week
n/amedian answer time
$0.01listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://audit.152-53-82-29.sslip.io/v1/niche
| Category | Code and developer |
|---|---|
| Provider host | audit.152-53-82-29.sslip.io |
| Networks | eip155:137, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
We never call tools that send, buy, move money or file anything, not even without paying.
Example input (from the provider)
{
"body": {
"limit": 10,
"query": "pdf to markdown"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"limit": {
"description": "Top listings to return, default 10",
"maximum": 25,
"minimum": 1,
"type": "integer"
},
"query": {
"description": "One to six words describing the service, for example pdf to markdown",
"type": "string"
}
},
"required": [
"query"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"bazaar_listings": {
"type": "integer"
},
"data_as_of": {
"type": "string"
},
"demand": {
"properties": {
"calls_30d": {
"type": "integer"
},
"listings_with_outside_payers": {
"type": "integer"
},
"max_unique_payers_30d": {
"type": "integer"
},
"median_unique_payers_30d_among_demand": {
"type": "integer"
},
"share_with_outside_payers": {
"type": "number"
}
},
"type": "object"
},
"match_mode": {
"enum": [
"all-words",
"most-words"
],
"type": "string"
},
"notes": {
"items": {
"type": "string"
},
"type": "array"
},
"price_usd": {
"properties": {
"all": {
"properties": {
"max": {
"type": "number"
},
"median": {
"type": "number"
},
"min": {
"type": "number"
},
"n": {
"type": "integer"
},
"p25": {
"type": "number"
},
"p75": {
"type": "number"
}
},
"type": [
"object",
"null"
]
},
"with_demand": {
"properties": {
"max": {
"type": "number"
},
"median": {
"type": "number"
},
"min": {
"type": "number"
},
"n": {
"type": "integer"
},
"p25": {
"type": "number"
},
"p75": {
"type": "number"
}
},
"type": [
"object",
"null"
]
}
},
"type": "object"
},
"query": {
"type": "string"
},
"supply": {
"properties": {
"called_last_7d": {
"type": "integer"
},
"hosts": {
"type": "integer"
},
"listings": {
"type": "integer"
}
},
"type": "object"
},
"top_hosts": {
"items": {
"properties": {
"calls_30d": {
"type": "integer"
},
"host": {
"type": "string"
},
"listings": {
"type": "integer"
},
"listings_with_demand": {
"type": "integer"
},
"max_unique_payers_30d": {
"type": "integer"
}
},
"type": "object"
},
"type": "array"
},
"top_listings": {
"items": {
"properties": {
"calls_30d": {
"type": "integer"
},
"description": {
"type": "string"
},
"host": {
"type": "string"
},
"last_called_at": {
"type": [
"string",
"null"
]
},
"networks": {
"items": {
"type": "string"
},
"type": "array"
},
"price_usd": {
"type": [
"number",
"null"
]
},
"resource": {