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POST
/
api
/
v1
/
agents
/
generate-completion
Generate agent completion
curl --request POST \
  --url https://app.dumplingai.com/api/v1/agents/generate-completion \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "agentId": "agnt_123",
  "input": "Summarize this article"
}
'
{}

​
Description

This endpoint processes messages for a specific agent, generating a response using one of your AI agents. It can optionally maintain conversation history through threads.

​
Endpoint

POST https://app.dumplingai.com/api/v1/agents/generate-completion

​
Headers

  • Content-Type: application/json
  • Authorization: Bearer <API_KEY> (required)

​
Request Body

{
  "messages": [
    {
      "role": "string",
      "content": "string"
    }
  ],
  "agentId": "string",
  "parseJson": "boolean",
  "threadId": "string"
}
  • messages: An array of message objects, each containing:
    • role: Either “user” or “assistant”
    • content: The content of the message
  • agentId: The unique identifier of the agent to use for processing
  • parseJson: Whether to try and parse the JSON in the response into a JSON object
  • threadId: (Optional) The ID of an existing thread to continue the conversation

​
Responses

​
Success (200 OK)

Returns the generated response, usage information, and thread details. 
{
  "parsedJson": "object",
  "text": "string",
  "stepsTaken": "number",
  "steps": [
    {
      "text": "string",
      "toolCalls": "array",
      "toolResults": "array",
      "finishReason": "string",
      "usage": "object"
    }
  ],
  "tokenUsage": {
    "promptTokens": "number",
    "completionTokens": "number",
    "totalTokens": "number"
  },
  "creditUsage": "number",
  "threadId": "string"
}

​
Error Responses

  • 400 Bad Request: If the request is invalid
  • 401 Unauthorized: If the API key is invalid or the user doesn’t have access to the specified agent
  • 403 Forbidden: If the user doesn’t have enough credits
  • 404 Not Found: If the specified agent or thread is not found

​
Notes

  • This endpoint uses 10 credits per 1000 total tokens used.
  • The agent must belong to the project owned by the authenticated user.
  • If no threadId is provided, a new thread will be created automatically.
  • Messages are stored in the thread for conversation history.

​
Rate Limiting

Rate limiting is applied based on the user’s subscription.

​
Example Request

curl -X POST https://app.dumplingai.com/api/v1/agents/generate-completion \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{
  "messages": [
    {
      "role": "user",
      "content": "Hello, can you help me with a task?"
    }
  ],
  "agentId": "agent_123456",
  "parseJson": false,
  "threadId": "optional_thread_id"
}'

​
Example Response

{
  "parsedJson": null,
  "text": "Certainly! I'd be happy to help you with a task. What kind of task do you need assistance with?",
  "stepsTaken": 1,
  "steps": [
    {
      "text": "Certainly! I'd be happy to help you with a task. What kind of task do you need assistance with?",
      "toolCalls": [],
      "toolResults": [],
      "finishReason": "stop",
      "usage": {
        "promptTokens": 20,
        "completionTokens": 15,
        "totalTokens": 35
      }
    }
  ],
  "tokenUsage": {
    "promptTokens": 20,
    "completionTokens": 15,
    "totalTokens": 35
  },
  "creditUsage": 1,
  "threadId": "thread_123456"
}

Authorizations

​
Authorization
string
header
required

Bearer authentication header of the form Bearer <token>, where <token> is your auth token.

Body

application/json

Parameters required to request an agent completion.

​
agentId
string
required

Identifier of the agent to run.

​
messages
object[]
required

Ordered conversation history sent to the agent.

​
threadId
string

Optional thread identifier for continuing a previous conversation.

​
parseJson
boolean

When true, attempt to parse the final response as JSON.

​
requestSource
enum<string>

Optional identifier describing where the API request originated.

Available options:
API,
WEB,
MAKE_DOT_COM,
ZAPIER,
N8N,
PLAYGROUND,
DEFAULT_AUTOMATION,
AGENT_PREVIEW,
AGENT_LIVE,
AUTOPILOT,
STUDIO

Response

Agent completion returned.

Flexible JSON structure; fields differ per endpoint.