Decide whether a schema change is safe to ship, with evidence
Decide whether a schema change is safe to ship, with evidence. Returns the compatibility verdict for your clients and, separately, how many of the real payloads you supply would newly be rejected, with the failing constraints ranked by how many payloads each costs. A breaking change nothing relies on is a different decision from one that rejects a tenth of your traffic.
Answeringour last check, 2026-10-04
1 of 1checks answered this week
5429 msmedian answer time
$0.22listed price per call
$0.22price 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-migration-impact
| 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 | $0.22 | 5429 ms |
Example input (from the provider)
{
"body": {
"after": {
"properties": {
"age": {
"minimum": 18,
"type": "integer"
},
"email": {
"format": "email",
"type": "string"
},
"tier": {
"enum": [
"free",
"pro"
],
"type": "string"
}
},
"required": [
"email"
],
"type": "object"
},
"before": {
"properties": {
"age": {
"type": "integer"
},
"email": {
"type": "string"
},
"tier": {
"type": "string"
}
},
"type": "object"
},
"documents": [
{
"age": 30,
"email": "a@example.com",
"tier": "pro"
},
{
"age": 16,
"email": "b@example.com",
"tier": "free"
},
{
"age": 40,
"email": "not-an-email",
"tier": "free"
},
{
"age": 25,
"tier": "enterprise"
},
{
"age": 22,
"email": "d@example.com",
"tier": "pro"
}
],
"role": "producers"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"after": {
"type": "object"
},
"before": {
"type": "object"
},
"documents": {
"items": {},
"maxItems": 500,
"minItems": 1,
"type": "array"
},
"role": {
"enum": [
"producers",
"consumers",
"both"
],
"type": "string"
}
},
"required": [
"before",
"after",
"documents"
],
"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"
}