Find out which keys every system holds and which only some do
Find out which keys every system holds and which only some do. Takes several datasets at once and returns a coverage histogram plus the keys present in only one and the keys partially covered, naming which datasets each is missing from. A pairwise comparison cannot express "present in three of five", which is the question when several systems are meant to hold the same population.
Answers HTTP 429 without x402 payment termsour last check, 2026-10-04
0 of 1checks answered this week
n/amedian answer time
$0.12listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://api.zfinia.com/x402/v1/key-coverage-audit
| Category | Code and developer |
|---|---|
| Provider host | api.zfinia.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-04 | no x402 terms | 429 | 244 ms |
Example input (from the provider)
{
"body": {
"datasets": [
{
"csv": "customer_id\nC-001\nC-002\nC-003\n",
"name": "crm"
},
{
"csv": "customer_id\nC-001\nC-002\n",
"name": "billing"
},
{
"csv": "customer_id\nC-001\nC-004\n",
"name": "warehouse"
}
],
"key": [
"customer_id"
]
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"datasets": {
"items": {
"additionalProperties": false,
"properties": {
"csv": {
"maxLength": 262144,
"type": "string"
},
"name": {
"maxLength": 64,
"type": "string"
}
},
"required": [
"name",
"csv"
],
"type": "object"
},
"maxItems": 10,
"minItems": 2,
"type": "array"
},
"delimiter": {
"maxLength": 1,
"minLength": 1,
"type": "string"
},
"key": {
"items": {
"maxLength": 256,
"type": "string"
},
"maxItems": 4,
"minItems": 1,
"type": "array"
},
"require_in_all": {
"type": "boolean"
}
},
"required": [
"datasets",
"key"
],
"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": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}