Find duplicate keys in one dataset, exactly and nearly
Find duplicate keys in one dataset, exactly and nearly. An exact duplicate is reported with every row it occupies. A near duplicate is two different keys that become identical once case, spacing or punctuation is set aside, which a unique index accepts and which is almost always the same entity entered twice. Keys are canonicalised exactly, so 42 and 42.0 are one key.
Answers HTTP 429 without x402 payment termsour last check, 2026-10-04
0 of 1checks answered this week
n/amedian answer time
$0.1listed price per call
n/aprice it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://api.zfinia.com/x402/v1/duplicate-key-audit
| Category | Code and developer |
|---|---|
| Provider host | api.zfinia.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-04 | no x402 terms | 429 | 243 ms |
Example input (from the provider)
{
"body": {
"csv": "email,signed_up\nAda@Example.test,2026-01-01\nada@example.test,2026-02-01\nada@example.test ,2026-03-01\ngrace@example.test,2026-01-05\ngrace@example.test,2026-04-01\n",
"key": [
"email"
],
"normalise": [
"lowercase",
"trim"
]
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"csv": {
"maxLength": 262144,
"type": "string"
},
"delimiter": {
"maxLength": 1,
"minLength": 1,
"type": "string"
},
"key": {
"items": {
"maxLength": 256,
"type": "string"
},
"maxItems": 4,
"minItems": 1,
"type": "array"
},
"normalise": {
"items": {
"enum": [
"lowercase",
"trim",
"collapse_whitespace",
"strip_punctuation"
],
"type": "string"
},
"maxItems": 4,
"minItems": 1,
"type": "array"
}
},
"required": [
"csv",
"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"
}