Roundhouse

Event Schema Compat

Decide whether an event schema registry change breaks anyone. Compares every event type across two registries and classifies each change by the audience it breaks. An event has one producer and many consumers, so both directions are assessed and the strict reading is the default: a consumer cannot be assumed to tolerate a new enum value. A removed event type is breaking for whoever subscribed to it.

Dataofflineeip155:8453Exactvia cdp
https://api.zfinia.com/x402/v1/event-schema-compatibility
EventsSchema compatibilityBreaking changeRelease safetyData contract
Settlements · 30d
218↓ 56%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$25.30
Verified settled volume
255 settlements proven x402 by their on-chain EIP-3009 marker.
$0.150
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 08:01Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x25e8245f07d5e4873987293dad666afbe56a9608

The 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.

0.15USDC≈ $0.15 USD
on Base · exact scheme

Pay 0.15 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
150000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x25e8245f07d5e4873987293dad666afbe56a9608",
    "amount": "150000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "after": {
            "order.created": {
              "type": "object",
              "required": [
                "event_id",
                "order_id",
                "total",
                "tenant_id"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "order.created"
                },
                "total": {
                  "type": "number",
                  "minimum": 1
                },
                "offset": {
                  "type": "integer"
                },
                "stream": {
                  "type": "string"
                },
                "event_id": {
                  "type": "string"
                },
                "order_id": {
                  "type": "string"
                },
                "tenant_id": {
                  "type": "string"
                },
                "schema_version": {
                  "type": "string"
                }
              }
            },
            "order.shipped": {
              "type": "object",
              "required": [
                "order_id"
              ],
              "properties": {
                "order_id": {
                  "type": "string"
                }
              }
            },
            "order.cancelled": {
              "type": "object",
              "required": [
                "order_id",
                "reason"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "order.cancelled"
                },
                "offset": {
                  "type": "integer"
                },
                "reason": {
                  "enum": [
                    "customer",
                    "fraud",
                    "duplicate"
                  ],
                  "type": "string"
                },
                "stream": {
                  "type": "string"
                },
                "event_id": {
                  "type": "string"
                },
                "order_id": {
                  "type": "string"
                },
                "schema_version": {
                  "type": "string"
                }
              }
            }
          },
          "before": {
            "order.created": {
              "type": "object",
              "required": [
                "event_id",
                "order_id",
                "total"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "order.created"
                },
                "total": {
                  "type": "number",
                  "minimum": 0
                },
                "offset": {
                  "type": "integer"
                },
                "stream": {
                  "type": "string"
                },
                "event_id": {
                  "type": "string"
                },
                "order_id": {
                  "type": "string"
                },
                "schema_version": {
                  "type": "string"
                }
              }
            },
            "order.refunded": {
              "type": "object",
              "required": [
                "order_id"
              ],
              "properties": {
                "amount": {
                  "type": "number"
                },
                "order_id": {
                  "type": "string"
                }
              }
            },
            "order.cancelled": {
              "type": "object",
              "required": [
                "order_id",
                "reason"
              ],
              "properties": {
                "type": {
                  "type": "string",
                  "const": "order.cancelled"
                },
                "offset": {
                  "type": "integer"
                },
                "reason": {
                  "enum": [
                    "customer",
                    "fraud"
                  ],
                  "type": "string"
                },
                "stream": {
                  "type": "string"
                },
                "event_id": {
                  "type": "string"
                },
                "order_id": {
                  "type": "string"
                },
                "schema_version": {
                  "type": "string"
                }
              }
            }
          }
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "limits": {
            "maxEvents": 2000,
            "maxSchemas": 100,
            "maxFindings": 500,
            "maxAttributes": 500,
            "maxPartitions": 500,
            "cardinalityWarning": 100
          },
          "complete": true,
          "findings": [
            {
              "code": "REQUIRED_PROPERTY_ADDED",
              "type": "order.created",
              "breaks": [
                "producers"
              ],
              "detail": "order.created at /tenant_id: tenant_id is now required, so a sender that omitted it now fails.",
              "pointer": "/tenant_id",
              "severity": "breaking"
            },
            {
              "code": "BOUND_TIGHTENED",
              "type": "order.created",
              "breaks": [
                "producers"
              ],
              "detail": "order.created at /total/minimum: minimum moved from 0 to 1, so a sender at the old limit now fails.",
              "pointer": "/total/minimum",
              "severity": "breaking"
            },
            {
              "code": "ENUM_WIDENED",
              "type": "order.cancelled",
              "breaks": [
                "consumers"
              ],
              "detail": "order.cancelled at /reason: 1 value(s) were added, so a reader with an exhaustive switch may not handle them.",
              "pointer": "/reason",
              "severity": "breaking"
            }
          ],
          "compatible": false,
          "request_id": "example-request",
          "service_id": "event_schema_compatibility",
          "added_types": [
            "order.shipped"
          ],
          "assumptions": [
            "An event has one producer and many consumers, so both directions are assessed and the strict reading is the default: a consumer cannot be assumed to tolerate a new field or a new enum value.",
            "A new event type breaks nobody and is listed rather than reported as a finding."
          ],
          "limitations": [
            "Registry-level reasoning. Whether any consumer actually subscribes to a given type is not knowable from the schemas.",
            "compatible is true only when every type was compared, nothing was unclassified, and nothing breaking was found."
          ],
          "observed_at": "2026-10-02T00:00:00.000Z",
          "risky_count": 0,
          "not_examined": [],
          "finding_count": 4,
          "breaking_count": 4,
          "types_affected": 3,
          "service_version": "1.0.0",
          "after_type_count": 3,
          "findings_by_code": {
            "ENUM_WIDENED": 1,
            "BOUND_TIGHTENED": 1,
            "EVENT_TYPE_REMOVED": 1,
            "REQUIRED_PROPERTY_ADDED": 1
          },
          "before_type_count": 3
        }
      }
    },
    "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": [
                "before",
                "after"
              ],
              "properties": {
                "after": {
                  "type": "object"
                },
                "before": {
                  "type": "object"
                }
              },
              "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 08:01Z
Last indexed by Roundhouse
2026-10-05 00:20Z
Last enriched (probe, favicon, geo)
2026-10-04 11:15Z
x402 version
2
Max timeout
60s
Liveness probe
HTTP 0
Report

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.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service Event Schema Compat 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=Event%20Schema%20Compat'
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/event-schema-compatibility, 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.