Decide whether two .proto sources are compatible, treating the field number as t
Decide whether two .proto sources are compatible, treating the field number as the identity it is. Reports a number freed without a reserved entry, which arms a future field to reinterpret old bytes; a number taken from a reserved range; a wire type change, which stops old messages decoding; a same-wire-type change that alters the decoded value, such as signed to unsigned; a rename, which is wire-safe and breaks generated code; cardinality and oneof moves; and enum number changes.
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/protobuf-schema-compatibility
| 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 | valid payment request | 402 | $0.22 | 2526 ms |
Example input (from the provider)
{
"body": {
"after": "syntax = \"proto3\";\npackage shop.v1;\n\nenum Status {\n UNKNOWN = 0;\n OPEN = 1;\n CLOSED = 2;\n}\n\nmessage Order {\n string order_id = 1;\n uint64 total_cents = 2;\n Status status = 3;\n string tags = 4;\n int32 discount_cents = 5;\n}\n",
"before": "syntax = \"proto3\";\npackage shop.v1;\n\nenum Status {\n STATUS_UNSPECIFIED = 0;\n OPEN = 1;\n CLOSED = 2;\n}\n\nmessage Order {\n string order_id = 1;\n int64 total_cents = 2;\n Status status = 3;\n repeated string tags = 4;\n string note = 5;\n}\n"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"after": {
"maxLength": 262144,
"type": "string"
},
"before": {
"maxLength": 262144,
"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"
}