Synthesize a JSON response body for one operation + status code in an OpenAPI 3.
Synthesize a JSON response body for one operation + status code in an OpenAPI 3.x or Swagger 2.x spec. Locate the operation by operationId or method+path. Pick the response by explicit `status`, else the first 2xx, else the first documented response. Generation precedence: operation-level `example`/`examples` > schema `example` > recursive type-inferred walk (objects walk properties, arrays return [mock(items)], enums return the first value, $ref is surfaced literally).
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://agent402.tools/api/openapi-mock-response
| Category | Code and developer |
|---|---|
| Provider host | agent402.tools |
| Networks | algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=, eip155:10, eip155:1329, eip155:137, eip155:143, eip155:42161, eip155:42220, eip155:43114, eip155:4663, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp, stellar:pubnet |
| Payment schemes | exact, upto |
| Self-reported calls, 30 days | 3 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.001 | 944 ms |
Example input (from the provider)
{
"body": {
"operationId": "getUser",
"spec": {
"openapi": "3.0.0",
"paths": {
"/users/{id}": {
"get": {
"operationId": "getUser",
"responses": {
"200": {
"content": {
"application/json": {
"schema": {
"properties": {
"active": {
"example": true,
"type": "boolean"
},
"id": {
"example": "u_42",
"type": "string"
},
"name": {
"example": "Alice",
"type": "string"
},
"roles": {
"items": {
"example": "admin",
"type": "string"
},
"type": "array"
}
},
"type": "object"
}
}
},
"description": "ok"
}
}
}
}
}
}
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"method": {
"description": "HTTP method (use with `path` if no operationId)"
},
"operationId": {
"description": "operationId to mock (preferred)"
},
"path": {
"description": "Path template (use with `method` if no operationId)"
},
"spec": {
"description": "OpenAPI/Swagger document (object or JSON string)"
},
"status": {
"description": "Response status to mock (defaults to first 2xx)"
}
},
"required": [
"spec"
]
},
"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": {
"properties": {
"contentType": {
"type": "string"
},
"mock": {
"properties": {
"active": {
"type": "boolean"
},
"id": {
"type": "string"
},
"name": {
"type": "string"
},
"roles": {
"items": {
"type": "string"
},
"type": "array"
}
},
"type": "object"
},
"source": {
"type": "string"
},
"status": {
"type": "string"
}
},
"required": [
"status",
"contentType",
"mock",
"source"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}