Decide whether two Avro schemas are compatible, in both directions, under the re
Decide whether two Avro schemas are compatible, in both directions, under the resolution rules rather than by structural comparison. Backward is a reader on the new schema reading data already written with the old one; forward is a reader still on the old schema reading data written with the new one. Fields match by name with reader aliases consulted, int promotes to long, float and double one way only, and an enum symbol the reader lacks needs an enum default.
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/avro-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 | $0.22 | 5757 ms |
Example input (from the provider)
{
"body": {
"after": {
"fields": [
{
"name": "order_id",
"type": "string"
},
{
"name": "total_cents",
"type": "int"
},
{
"name": "status",
"type": {
"name": "Status",
"symbols": [
"OPEN"
],
"type": "enum"
}
},
{
"default": null,
"name": "note",
"type": [
"null",
"string"
]
},
{
"name": "channel",
"type": "string"
}
],
"name": "Order",
"namespace": "shop.v1",
"type": "record"
},
"before": {
"fields": [
{
"name": "order_id",
"type": "string"
},
{
"name": "total_cents",
"type": "long"
},
{
"name": "status",
"type": {
"name": "Status",
"symbols": [
"OPEN",
"CLOSED"
],
"type": "enum"
}
},
{
"default": null,
"name": "note",
"type": [
"null",
"string"
]
}
],
"name": "Order",
"namespace": "shop.v1",
"type": "record"
}
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"after": {
"type": [
"object",
"string"
]
},
"before": {
"type": [
"object",
"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"
}