Darwin Technologies, Inc. · Schema
SendMessageBody
CompanyArtificial IntelligencePlatformDeveloper ToolsMarketplaceProductivity
JSON Schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"$id": "https://artifacts.apis.io/darwin-so/json-schema/darwin-so-send-message-body-schema.json",
"title": "SendMessageBody",
"x-generated": "2026-11-05",
"x-method": "derived",
"x-generator": "derive-json-schema.py",
"x-source": "openapi/darwin-so-openapi.json#/components/schemas/SendMessageBody",
"type": "object",
"oneOf": [
{
"type": "object",
"properties": {
"messageType": {
"type": "string",
"const": "input_response",
"description": "The kind of message or exact confirmation to append."
},
"messageContent": {
"type": "object",
"properties": {
"request": {
"type": "string",
"minLength": 1,
"maxLength": 200,
"pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
"description": "Exact pending input request returned by get_thread."
},
"arguments": {
"type": "object",
"propertyNames": {
"type": "string",
"maxLength": 200
},
"additionalProperties": {},
"description": "Requested information matching that request schema. This continues the same operation; it is not a new action."
}
},
"required": [
"request",
"arguments"
],
"additionalProperties": false,
"description": "The text or typed payload for this message type."
},
"agent": {
"type": "string",
"minLength": 1,
"maxLength": 200,
"pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
"description": "Optional agent in your account that owns this side of the thread."
},
"idempotencyKey": {
"type": "string",
"minLength": 1,
"maxLength": 200,
"pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
"description": "Optional stable key for this message. Reuse it with unchanged inputs after a timeout."
}
},
"required": [
"messageType",
"messageContent"
],
"additionalProperties": false
},
{
"type": "object",
"properties": {
"messageType": {
"type": "string",
"const": "message",
"description": "The kind of message or exact confirmation to append."
},
"messageContent": {
"type": "string",
"minLength": 1,
"maxLength": 32000,
"description": "The text or typed payload for this message type."
},
"agent": {
"type": "string",
"minLength": 1,
"maxLength": 200,
"pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
"description": "Optional agent in your account that owns this side of the thread."
},
"attachments": {
"maxItems": 19,
"type": "array",
"items": {
"type": "object",
"properties": {
"type": {
"type": "string",
"enum": [
"image",
"audio",
"video",
"file"
]
},
"asset": {
"type": "string",
"minLength": 1,
"maxLength": 200,
"pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$"
}
},
"required": [
"type",
"asset"
],
"additionalProperties": false
},
"description": "Optional validated assets to include with an ordinary message."
},
"idempotencyKey": {
"type": "string",
"minLength": 1,
"maxLength": 200,
"pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
"description": "Optional stable key for this message. Reuse it with unchanged inputs after a timeout."
}
},
"required": [
"messageType",
"messageContent"
],
"additionalProperties": false
},
{
"type": "object",
"properties": {
"messageType": {
"type": "string",
"const": "action_request",
"description": "The kind of message or exact confirmation to append."
},
"messageContent": {
"type": "object",
"properties": {
"operationId": {
"type": "string",
"minLength": 1,
"maxLength": 200,
"pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
"description": "Exact executable operation identifier returned by Search or get_thread."
},
"arguments": {
"type": "object",
"propertyNames": {
"type": "string",
"maxLength": 200
},
"additionalProperties": {},
"description": "Arguments for that operation, matching its advertised input schema. Never include credentials or payment details."
},
"account": {
"description": "Optional saved external-account reference. This is an opaque Darwin ID, never a token or secret.",
"type": "string",
"minLength": 1,
"maxLength": 200,
"pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$"
}
},
"required": [
"operationId",
"arguments"
],
"additionalProperties": false,
"description": "The text or typed payload for this message type."
},
"agent": {
"type": "string",
"minLength": 1,
"maxLength": 200,
"pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
"description": "Optional agent in your account that owns this side of the thread."
},
"idempotencyKey": {
"type": "string",
"minLength": 1,
"maxLength": 200,
"pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
"description": "Optional stable key for this message. Reuse it with unchanged inputs after a timeout."
}
},
"required": [
"messageType",
"messageContent"
],
"additionalProperties": false
},
{
"type": "object",
"properties": {
"messageType": {
"type": "string",
"const": "action_confirmation",
"description": "The kind of message or exact confirmation to append."
},
"messageContent": {
"type": "object",
"properties": {
"request": {
"type": "string",
"minLength": 1,
"maxLength": 200,
"pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
"description": "Exact immutable request identifier returned by get_thread."
}
},
"required": [
"request"
],
"additionalProperties": false,
"description": "The text or typed payload for this message type."
},
"agent": {
"type": "string",
"minLength": 1,
"maxLength": 200,
"pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
"description": "Optional agent in your account that owns this side of the thread."
},
"idempotencyKey": {
"type": "string",
"minLength": 1,
"maxLength": 200,
"pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
"description": "Optional stable key for this message. Reuse it with unchanged inputs after a timeout."
}
},
"required": [
"messageType",
"messageContent"
],
"additionalProperties": false
},
{
"type": "object",
"properties": {
"messageType": {
"type": "string",
"const": "approval_confirmation",
"description": "The kind of message or exact confirmation to append."
},
"messageContent": {
"type": "object",
"properties": {
"request": {
"type": "string",
"minLength": 1,
"maxLength": 200,
"pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
"description": "Exact immutable approval request identifier returned by get_thread."
},
"decision": {
"type": "string",
"enum": [
"allow",
"deny"
],
"description": "Approval decision: allow authorizes only the referenced request; deny rejects only that request. Neither value substitutes for another request type."
}
},
"required": [
"request",
"decision"
],
"additionalProperties": false,
"description": "The text or typed payload for this message type."
},
"agent": {
"type": "string",
"minLength": 1,
"maxLength": 200,
"pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
"description": "Optional agent in your account that owns this side of the thread."
},
"idempotencyKey": {
"type": "string",
"minLength": 1,
"maxLength": 200,
"pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
"description": "Optional stable key for this message. Reuse it with unchanged inputs after a timeout."
}
},
"required": [
"messageType",
"messageContent"
],
"additionalProperties": false
},
{
"type": "object",
"properties": {
"messageType": {
"type": "string",
"const": "completion_confirmation",
"description": "The kind of message or exact confirmation to append."
},
"messageContent": {
"type": "object",
"properties": {
"request": {
"type": "string",
"minLength": 1,
"maxLength": 200,
"pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
"description": "Exact immutable request identifier returned by get_thread."
}
},
"required": [
"request"
],
"additionalProperties": false,
"description": "The text or typed payload for this message type."
},
"agent": {
"type": "string",
"minLength": 1,
"maxLength": 200,
"pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
"description": "Optional agent in your account that owns this side of the thread."
},
"idempotencyKey": {
"type": "string",
"minLength": 1,
"maxLength": 200,
"pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
"description": "Optional stable key for this message. Reuse it with unchanged inputs after a timeout."
}
},
"required": [
"messageType",
"messageContent"
],
"additionalProperties": false
},
{
"type": "object",
"properties": {
"messageType": {
"type": "string",
"const": "cancellation_request",
"description": "The kind of message or exact confirmation to append."
},
"messageContent": {
"type": "object",
"properties": {
"actionId": {
"type": "string",
"minLength": 1,
"maxLength": 200,
"pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
"description": "Exact in-flight action identifier returned by get_thread whose cancellation should be requested."
}
},
"required": [
"actionId"
],
"additionalProperties": false,
"description": "The text or typed payload for this message type."
},
"agent": {
"type": "string",
"minLength": 1,
"maxLength": 200,
"pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
"description": "Optional agent in your account that owns this side of the thread."
},
"idempotencyKey": {
"type": "string",
"minLength": 1,
"maxLength": 200,
"pattern": "^[A-Za-z0-9][A-Za-z0-9_.:-]*$",
"description": "Optional stable key for this message. Reuse it with unchanged inputs after a timeout."
}
},
"required": [
"messageType",
"messageContent"
],
"additionalProperties": false
}
]
}Work with this as data
Every JSON Schema here is available over the APIs.io API and to AI agents over MCP.
MCP server
One button, every client — Claude, Cursor, VS Code and the rest.
https://apis.io/mcp
Tools for schemas
4 MCP tools reach this
find_json_schemasBrowse and filter every JSON Schema in the catalog.apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.resolveTurn a domain, URL or GitHub org into the provider it belongs to.find_cohortsEvery scored population of providers in the catalog.
Call it yourself
curl for this page
This JSON Schema
curl "https://apis.io/api/v1/json-schemas/darwin-so-send-message-body"
All schemas
curl "https://apis.io/api/v1/json-schemas?limit=25"Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.
Get an API key
Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.
A second provider on the same verified email joins the account you already have.