Avro Mode Audit
Judge a sequence of Avro schema versions against a named compatibility mode: BACKWARD, FORWARD or FULL, each with its transitive form, or NONE. A transitive mode compares every version against every earlier one; a per-step mode compares only the immediate predecessor, and the gap that leaves is stated rather than hidden. Every comparison performed is listed with its directional result, so a caller can see what was checked as well as the verdict.
Mediaofflineeip155:8453Exactvia cdp
AvroSchema registryCompatibility modesKafkaRelease gate
Settlements · 30d
219↓ 38%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$25.35
Verified settled volume
256 settlements proven x402 by their on-chain EIP-3009 marker.
$0.180
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-10-04 08:20Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x25e8245f07d5e4873987293dad666afbe56a9608The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.18USDC≈ $0.18 USD
on Base · exact scheme
Pay 0.18 USDC on Base to 0x25e8…a9608. The signed payment is good for 1 minute.
- Paid to
- 0x25e8…a9608
- USD Coin contract
- 0x8335…02913
- Payment window
- 1 minute
- As published
- 180000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x25e8245f07d5e4873987293dad666afbe56a9608",
"amount": "180000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"mode": "BACKWARD_TRANSITIVE",
"versions": [
{
"id": "v1",
"schema": {
"name": "Event",
"type": "record",
"fields": [
{
"name": "id",
"type": "string"
},
{
"name": "a",
"type": "string",
"default": ""
}
],
"namespace": "shop"
}
},
{
"id": "v2",
"schema": {
"name": "Event",
"type": "record",
"fields": [
{
"name": "id",
"type": "string"
},
{
"name": "a",
"type": "string",
"default": ""
},
{
"name": "b",
"type": "string",
"default": ""
}
],
"namespace": "shop"
}
},
{
"id": "v3",
"schema": {
"name": "Event",
"type": "record",
"fields": [
{
"name": "id",
"type": "string"
},
{
"name": "b",
"type": "string",
"default": ""
},
{
"name": "c",
"type": "int"
}
],
"namespace": "shop"
}
}
]
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"mode": "BACKWARD_TRANSITIVE",
"valid": false,
"limits": {
"maxFindings": 500,
"maxSdlBytes": 262144,
"maxVersions": 25,
"maxAvroBytes": 262144,
"maxConsumers": 50,
"maxProtoBytes": 262144,
"maxPathsPerConsumer": 200
},
"passed": false,
"complete": true,
"findings": [
{
"to": "v3",
"code": "READER_FIELD_HAS_NO_DEFAULT",
"from": "v1",
"detail": "v3 cannot read data written with v1: The reader expects c, the writer does not write it, and it declares no default, so the reader cannot fill it.",
"location": "(root).c",
"direction": "backward"
},
{
"to": "v3",
"code": "READER_FIELD_HAS_NO_DEFAULT",
"from": "v2",
"detail": "v3 cannot read data written with v2: The reader expects c, the writer does not write it, and it declares no default, so the reader cannot fill it.",
"location": "(root).c",
"direction": "backward"
}
],
"request_id": "example-request",
"service_id": "avro_compatibility_mode_audit",
"transitive": true,
"assumptions": [
"The versions are read in the order supplied, oldest first. Nothing is fetched and no registry is consulted, so the order supplied is the order judged.",
"A transitive mode compares each version against every earlier one; a non-transitive mode compares only the immediate predecessor, and the gap that leaves is stated rather than hidden.",
"NONE compares nothing and is reported as having compared nothing, which is not the same as a pass."
],
"comparisons": [
{
"to": "v2",
"from": "v1",
"forward": null,
"backward": true
},
{
"to": "v3",
"from": "v1",
"forward": null,
"backward": false
},
{
"to": "v3",
"from": "v2",
"forward": null,
"backward": false
}
],
"limitations": [
"Whether the sequence supplied satisfies the mode named. What a particular registry would accept, including its own subject-level overrides, is outside this.",
"valid is true only when every comparison the mode requires was performed and all of them resolved cleanly."
],
"observed_at": "2026-10-02T00:00:00.000Z",
"version_ids": [
"v1",
"v2",
"v3"
],
"not_examined": [],
"finding_count": 2,
"version_count": 3,
"service_version": "1.0.0",
"comparison_count": 3,
"findings_by_code": {
"READER_FIELD_HAS_NO_DEFAULT": 2
}
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [
"versions",
"mode"
],
"properties": {
"mode": {
"enum": [
"BACKWARD",
"BACKWARD_TRANSITIVE",
"FORWARD",
"FORWARD_TRANSITIVE",
"FULL",
"FULL_TRANSITIVE",
"NONE"
],
"type": "string"
},
"versions": {
"type": "array",
"items": {
"type": "object",
"required": [
"schema"
],
"properties": {
"id": {
"type": "string",
"maxLength": 64
},
"schema": {
"type": [
"object",
"string"
]
}
},
"additionalProperties": false
},
"maxItems": 25,
"minItems": 2
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-04 08:20Z
- Last indexed by Roundhouse
- 2026-10-05 00:20Z
- Last enriched (probe, favicon, geo)
- 2026-10-05 00:46Z
- x402 version
- 2
- Max timeout
- 60s
- Liveness probe
- HTTP 0
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Avro Mode Audit and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Avro%20Mode%20Audit' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://api.zfinia.com/x402/v1/avro-compatibility-mode-audit, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.