OpenAPI Param Drift
See which parameters and request bodies changed obligation between two OpenAPI documents. Separates tightening, where an existing caller now fails, from loosening, where a handler may now receive nothing it previously could not. A path parameter is treated as required whatever the document says, so moving one between optional and required is not reported as a change.
Otherofflineeip155:8453Exactvia cdp
OpenapiRequired fieldsApi contractRelease safetyDeveloper tooling
Settlements · 30d
219↓ 44%
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.
$0.100
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 07:54Z
—
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.
0.1USDC≈ $0.1 USD
on Base · exact scheme
Pay 0.1 USDC on Base to 0x25e8…a9608. The signed payment is good for 1 minute.
- Paid to
- 0x25e8…a9608
- USD Coin contract
- 0x8335…02913
- Payment window
- 1 minute
- As published
- 100000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x25e8245f07d5e4873987293dad666afbe56a9608",
"amount": "100000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"after": {
"info": {
"title": "Orders API",
"version": "2.0.0"
},
"paths": {
"/orders": {
"get": {
"summary": "List orders",
"responses": {
"200": {
"content": {
"application/json": {
"schema": {
"type": "array",
"items": {
"$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": {
"limits": {
"maxFindings": 500,
"maxOperations": 500,
"maxClientOperations": 200,
"maxRequestBodyBytes": 262144
},
"stable": false,
"complete": true,
"findings": [
{
"code": "REQUIRED_PARAMETER_ADDED",
"detail": "GET /orders: query:tenant is new and required, so every existing caller fails.",
"operation": "GET /orders",
"parameter": "query:tenant"
},
{
"code": "REQUEST_BODY_BECAME_REQUIRED",
"detail": "POST /orders: the request body is now required.",
"operation": "POST /orders"
}
],
"request_id": "example-request",
"service_id": "openapi_required_parameter_drift",
"assumptions": [
"A path parameter is required whatever the document says, so moving one from optional to required is not reported as a change.",
"Tightening breaks existing callers; loosening means a handler may now receive nothing where it previously could not."
],
"limitations": [
"Parameter and request-body obligation only. Value-level schema compatibility is openapi_breaking_change_audit.",
"stable is true only when both documents were read in full and no obligation moved in either direction."
],
"observed_at": "2026-10-02T00:00:00.000Z",
"not_examined": [],
"finding_count": 2,
"loosened_count": 0,
"service_version": "1.0.0",
"tightened_count": 2,
"findings_by_code": {
"REQUIRED_PARAMETER_ADDED": 1,
"REQUEST_BODY_BECAME_REQUIRED": 1
},
"operations_compared": 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 07:54Z
- Last indexed by Roundhouse
- 2026-10-05 00:20Z
- Last enriched (probe, favicon, geo)
- 2026-10-04 11:16Z
- 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 Param Drift 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%20Param%20Drift' 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-required-parameter-drift, 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.