Resolve a pending message

Submits a human resolution for a message in input-required state. The resolution contains field values matching the A2UI spec’s field IDs. On success, the message transitions from input-required to working and the agent resumes execution. Returns 409 Conflict if the message was already resolved.

Authentication: accepts either a JWT (Authorization: Bearer) or a callback_token in the request body. Use JWT when calling from the dashboard or API. Use callback_token when resolving from an external system that received a webhook notification.

POST

messages

{message_id}

resolve

Resolve a pending message

curl --request POST \
  --url https://api.svantic.com/messages/{message_id}/resolve \
  --header 'Content-Type: application/json' \
  --data '
{
  "resolution": {
    "decision": "approve"
  },
  "callback_token": "<string>"
}
'

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({resolution: {decision: 'approve'}, callback_token: '<string>'})
};

fetch('https://api.svantic.com/messages/{message_id}/resolve', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.svantic.com/messages/{message_id}/resolve"

payload = {
    "resolution": { "decision": "approve" },
    "callback_token": "<string>"
}
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.svantic.com/messages/{message_id}/resolve"

	payload := strings.NewReader("{\n  \"resolution\": {\n    \"decision\": \"approve\"\n  },\n  \"callback_token\": \"<string>\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

{
  "ok": true,
  "message_id": "task-uuid-456",
  "new_state": "working"
}

{
  "error": "Invalid request body",
  "code": "BAD_REQUEST"
}

{
  "error": "<string>",
  "code": "<string>",
  "request_id": "<string>",
  "timestamp": "2023-11-07T05:31:56Z"
}

{
  "error": "Not found",
  "code": "NOT_FOUND",
  "request_id": "req_01EXAMPLE",
  "timestamp": "2026-03-31T12:00:00.000Z"
}

{
  "error": "<string>",
  "code": "<string>",
  "request_id": "<string>",
  "timestamp": "2023-11-07T05:31:56Z"
}

{
  "error": "<string>",
  "code": "<string>",
  "request_id": "<string>",
  "timestamp": "2023-11-07T05:31:56Z"
}

{
  "error": "Internal server error",
  "code": "INTERNAL_ERROR",
  "request_id": "req_01EXAMPLE",
  "timestamp": "2026-03-31T12:00:00.000Z"
}

Path Parameters

message_id

string

required

The message ID to resolve.

Body

application/json

Submit a resolution for a pending message. Field keys in resolution must match the A2UI field IDs from the original request. Authenticate with either a JWT (via Authorization header) or a callback_token (in the body).

resolution

object

required

Key-value pairs matching the A2UI field IDs. For simple approvals: { "decision": "approve" }. For forms: { "username": "...", "password": "..." }.

Example:

{ "decision": "approve" }

callback_token

string

Single-use token from an outbound webhook notification. Provides authentication when the caller doesn't have a JWT. Mutually exclusive with Bearer auth — provide one or the other.

Response

Resolution accepted — agent will resume.

Resolution result.

boolean

Whether the resolution was accepted.

message_id

string

The message that was resolved.

new_state

enum<string>

The message's state after resolution.

Available options:

working,

completed,

failed

Resolve a pending message

curl --request POST \
  --url https://api.svantic.com/messages/{message_id}/resolve \
  --header 'Content-Type: application/json' \
  --data '
{
  "resolution": {
    "decision": "approve"
  },
  "callback_token": "<string>"
}
'

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({resolution: {decision: 'approve'}, callback_token: '<string>'})
};

fetch('https://api.svantic.com/messages/{message_id}/resolve', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.svantic.com/messages/{message_id}/resolve"

payload = {
    "resolution": { "decision": "approve" },
    "callback_token": "<string>"
}
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.svantic.com/messages/{message_id}/resolve"

	payload := strings.NewReader("{\n  \"resolution\": {\n    \"decision\": \"approve\"\n  },\n  \"callback_token\": \"<string>\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

{
  "ok": true,
  "message_id": "task-uuid-456",
  "new_state": "working"
}

{
  "error": "Invalid request body",
  "code": "BAD_REQUEST"
}

{
  "error": "<string>",
  "code": "<string>",
  "request_id": "<string>",
  "timestamp": "2023-11-07T05:31:56Z"
}

{
  "error": "Not found",
  "code": "NOT_FOUND",
  "request_id": "req_01EXAMPLE",
  "timestamp": "2026-03-31T12:00:00.000Z"
}

{
  "error": "<string>",
  "code": "<string>",
  "request_id": "<string>",
  "timestamp": "2023-11-07T05:31:56Z"
}

{
  "error": "<string>",
  "code": "<string>",
  "request_id": "<string>",
  "timestamp": "2023-11-07T05:31:56Z"
}

{
  "error": "Internal server error",
  "code": "INTERNAL_ERROR",
  "request_id": "req_01EXAMPLE",
  "timestamp": "2026-03-31T12:00:00.000Z"
}

REST API

WebSocket

Resolve a pending message

Path Parameters

Body

Response