OpenAPI Breaking Change
Decide whether an API change breaks your clients, operation by operation. Compares parameters, request bodies, responses and security across two OpenAPI documents, and classifies each change by who it breaks: the clients that call the API or the clients that read its responses. A newly required parameter breaks callers; a widened response enum breaks readers. A change it cannot classify is never counted as safe.
Otherofflineeip155:8453Exactvia cdp
OpenapiBreaking changeApi contractRelease safetyDeveloper tooling
Settlements · 30d
224↑ 25%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$25.38
Verified settled volume
261 settlements proven x402 by their on-chain EIP-3009 marker.
$0.250
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 07:52Z
—
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.
0.25USDC≈ $0.25 USD
on Base · exact scheme
Pay 0.25 USDC on Base to 0x25e8…a9608. The signed payment is good for 1 minute.
- Paid to
- 0x25e8…a9608
- USD Coin contract
- 0x8335…02913
- Payment window
- 1 minute
- As published
- 250000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x25e8245f07d5e4873987293dad666afbe56a9608",
"amount": "250000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"role": "both",
"after": {
"info": {
"title": "Orders API",
"version": "2.0.0"
},
"paths": {
"/orders": {
"get": {
"summary": "List orders",
"responses": {
"200": {
"content": {
"application/json": {
"schema": {
"type": "array",
"items": {
"$ref": "#/components/schemas/Order"
}
}
}
},
"description": "A page of orders"
}
},
"parameters": [
{
"in": "query",
"name": "tenant",
"schema": {
"type": "string"
},
"required": true
}
],
"operationId": "listOrdersV2"
},
"post": {
"summary": "Create an order",
"responses": {
"201": {
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/Order"
}
}
},
"description": "Created"
}
},
"operationId": "createOrder",
"requestBody": {
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/Order"
}
}
},
"required": true
}
},
"parameters": [
{
"in": "query",
"name": "page",
"schema": {
"type": "integer",
"minimum": 1
}
}
]
},
"/orders/{id}": {
"get": {
"summary": "Fetch one order",
"responses": {
"200": {
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/Order"
}
}
},
"description": "The order"
},
"404": {
"description": "Not found"
}
},
"deprecated": true,
"parameters": [
{
"in": "path",
"name": "id",
"schema": {
"type": "string"
}
}
],
"operationId": "getOrder"
}
}
},
"openapi": "3.1.0",
"security": [
{
"apiKey": []
}
],
"components": {
"schemas": {
"Order": {
"type": "object",
"required": [
"id",
"total",
"tenant_id"
],
"properties": {
"id": {
"type": "string"
},
"total": {
"type": "number"
},
"status": {
"enum": [
"open",
"shipped",
"disputed"
],
"type": "string"
},
"tenant_id": {
"type": "string"
}
}
}
},
"securitySchemes": {
"apiKey": {
"in": "query",
"name": "api_key",
"type": "apiKey"
}
}
}
},
"before": {
"info": {
"title": "Orders API",
"version": "1.4.0"
},
"paths": {
"/orders": {
"get": {
"summary": "List orders",
"responses": {
"200": {
"content": {
"application/json": {
"schema": {
"type": "array",
"items": {
"$ref": "#/components/schemas/Order"
}
}
}
},
"description": "A page of orders"
},
"429": {
"description": "Rate limited"
}
},
"operationId": "listOrders"
},
"post": {
"summary": "Create an order",
"responses": {
"201": {
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/Order"
}
}
},
"description": "Created"
}
},
"operationId": "createOrder",
"requestBody": {
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/Order"
}
}
}
}
},
"parameters": [
{
"in": "query",
"name": "page",
"schema": {
"type": "integer",
"minimum": 1
}
}
]
},
"/orders/{id}": {
"get": {
"summary": "Fetch one order",
"responses": {
"200": {
"content": {
"application/json": {
"schema": {
"$ref": "#/components/schemas/Order"
}
}
},
"description": "The order"
},
"404": {
"description": "Not found"
}
},
"parameters": [
{
"in": "path",
"name": "id",
"schema": {
"type": "string"
}
}
],
"operationId": "getOrder"
}
},
"/legacy/export": {
"get": {
"summary": "Legacy export",
"responses": {
"200": {
"description": "A CSV export"
}
},
"operationId": "legacyExport"
}
}
},
"openapi": "3.1.0",
"security": [
{
"apiKey": []
}
],
"components": {
"schemas": {
"Order": {
"type": "object",
"required": [
"id",
"total"
],
"properties": {
"id": {
"type": "string"
},
"total": {
"type": "number"
},
"status": {
"enum": [
"open",
"shipped"
],
"type": "string"
},
"legacy_ref": {
"type": "string"
}
}
}
},
"securitySchemes": {
"apiKey": {
"in": "header",
"name": "X-Api-Key",
"type": "apiKey"
}
}
}
}
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"role": "both",
"limits": {
"maxFindings": 500,
"maxOperations": 500,
"maxClientOperations": 200,
"maxRequestBodyBytes": 262144
},
"complete": true,
"findings": [
{
"code": "REQUIRED_PARAMETER_ADDED",
"breaks": [
"producers"
],
"detail": "GET /orders: query:tenant is newly required, so a caller that omitted it now fails.",
"severity": "breaking",
"operation": "GET /orders",
"parameter": "query:tenant"
},
{
"code": "RESPONSE_REQUIRED_PROPERTY_ADDED",
"breaks": [
"producers"
],
"detail": "GET /orders response 200 application/json: tenant_id is now required, so a sender that omitted it now fails.",
"pointer": "/items/tenant_id",
"severity": "breaking",
"operation": "GET /orders response 200 application/json"
},
{
"code": "RESPONSE_ENUM_WIDENED",
"breaks": [
"consumers"
],
"detail": "GET /orders response 200 application/json: 1 value(s) were added, so a reader with an exhaustive switch may not handle them.",
"pointer": "/items/status",
"severity": "breaking",
"operation": "GET /orders response 200 application/json"
}
],
"compatible": false,
"request_id": "example-request",
"service_id": "openapi_breaking_change_audit",
"assumptions": [
"producers are the clients that call the API and consumers are the clients that read its responses. A request-side change breaks producers; a response-side change breaks consumers.",
"A path parameter is required whatever the document says, because the route cannot be built without it.",
"Path-level parameters are inherited by every operation under that path, and an operation-level parameter of the same name and location overrides it."
],
"limitations": [
"Document-level reasoning. Whether any real client depends on a given operation or field is not knowable from the specifications; openapi_client_breakage_report narrows this to the operations a named c...",
"compatible is true only when both documents were read in full and nothing breaking was found for the stated role."
],
"observed_at": "2026-10-02T00:00:00.000Z",
"not_examined": [],
"after_version": "3.1.0",
"finding_count": 17,
"before_version": "3.1.0",
"breaking_count": 16,
"service_version": "1.0.0",
"findings_by_code": {
"OPERATION_REMOVED": 1,
"OPERATION_DEPRECATED": 1,
"REQUEST_ENUM_WIDENED": 1,
"RESPONSE_ENUM_WIDENED": 3,
"RESPONSE_STATUS_REMOVED": 1,
"REQUEST_PROPERTY_REMOVED": 1,
"REQUIRED_PARAMETER_ADDED": 1,
"RESPONSE_PROPERTY_REMOVED": 3,
"REQUEST_BODY_BECAME_REQUIRED": 1,
"REQUEST_REQUIRED_PROPERTY_ADDED": 1,
"RESPONSE_REQUIRED_PROPERTY_ADDED": 3
},
"operations_added": 0,
"operations_changed": 3,
"operations_removed": 1,
"after_operation_count": 3,
"before_operation_count": 4
}
}
},
"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": {
"role": {
"enum": [
"producers",
"consumers",
"both"
],
"type": "string"
},
"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 07:52Z
- Last indexed by Roundhouse
- 2026-10-05 00:20Z
- Last enriched (probe, favicon, geo)
- 2026-10-04 10:45Z
- 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 OpenAPI Breaking Change 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=OpenAPI%20Breaking%20Change' 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/openapi-breaking-change-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.