Decide whether a schema change breaks your clients, and which ones
Decide whether a schema change breaks your clients, and which ones. Classifies every change by the audience it breaks: producers construct the payload, consumers read it. Adding a required field breaks senders; adding an enum value breaks readers. A change it cannot classify is reported as unclassified and never counted as safe.
Answeringour last check, 2026-10-04
1 of 1checks answered this week
8337 msmedian answer time
$0.15listed price per call
$0.15price 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/json-schema-compatibility
| Category | Everything else |
|---|---|
| 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 | valid payment request | 402 | $0.15 | 8337 ms |
Example input (from the provider)
{
"body": {
"after": {
"properties": {
"id": {
"type": "string"
},
"status": {
"enum": [
"open",
"closed",
"disputed"
],
"type": "string"
},
"total": {
"maximum": 100000,
"type": "number"
}
},
"required": [
"id"
],
"type": "object"
},
"before": {
"properties": {
"id": {
"type": "string"
},
"note": {
"type": "string"
},
"status": {
"enum": [
"open",
"closed"
],
"type": "string"
},
"total": {
"maximum": 1000,
"type": "number"
}
},
"required": [
"id"
],
"type": "object"
},
"role": "consumers"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"after": {
"type": "object"
},
"before": {
"type": "object"
},
"role": {
"enum": [
"producers",
"consumers",
"both"
],
"type": "string"
}
},
"required": [
"before",
"after"
],
"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"
}