Update Agent Version

POST /v2/agents/version/update

Update Agent Version

cURL

curl --request POST \
  --url https://api.velt.dev/v2/agents/version/update \
  --header 'Content-Type: application/json' \
  --header 'x-velt-api-key: <x-velt-api-key>' \
  --header 'x-velt-auth-token: <x-velt-auth-token>' \
  --data '
{
  "data": {
    "agentId": "<string>",
    "rawInstructions": "<string>",
    "instructions": "<string>",
    "phaseTimeoutMs": 123,
    "contextGathering": {},
    "execution": {},
    "response": {},
    "postProcess": {},
    "input": {},
    "scope": {},
    "setup": {}
  }
}
'

import requests

url = "https://api.velt.dev/v2/agents/version/update"

payload = { "data": {
        "agentId": "<string>",
        "rawInstructions": "<string>",
        "instructions": "<string>",
        "phaseTimeoutMs": 123,
        "contextGathering": {},
        "execution": {},
        "response": {},
        "postProcess": {},
        "input": {},
        "scope": {},
        "setup": {}
    } }
headers = {
    "x-velt-api-key": "<x-velt-api-key>",
    "x-velt-auth-token": "<x-velt-auth-token>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'x-velt-api-key': '<x-velt-api-key>',
    'x-velt-auth-token': '<x-velt-auth-token>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    data: {
      agentId: '<string>',
      rawInstructions: '<string>',
      instructions: '<string>',
      phaseTimeoutMs: 123,
      contextGathering: {},
      execution: {},
      response: {},
      postProcess: {},
      input: {},
      scope: {},
      setup: {}
    }
  })
};

fetch('https://api.velt.dev/v2/agents/version/update', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.velt.dev/v2/agents/version/update",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'data' => [
        'agentId' => '<string>',
        'rawInstructions' => '<string>',
        'instructions' => '<string>',
        'phaseTimeoutMs' => 123,
        'contextGathering' => [
                
        ],
        'execution' => [
                
        ],
        'response' => [
                
        ],
        'postProcess' => [
                
        ],
        'input' => [
                
        ],
        'scope' => [
                
        ],
        'setup' => [
                
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "x-velt-api-key: <x-velt-api-key>",
    "x-velt-auth-token: <x-velt-auth-token>"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

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

func main() {

	url := "https://api.velt.dev/v2/agents/version/update"

	payload := strings.NewReader("{\n  \"data\": {\n    \"agentId\": \"<string>\",\n    \"rawInstructions\": \"<string>\",\n    \"instructions\": \"<string>\",\n    \"phaseTimeoutMs\": 123,\n    \"contextGathering\": {},\n    \"execution\": {},\n    \"response\": {},\n    \"postProcess\": {},\n    \"input\": {},\n    \"scope\": {},\n    \"setup\": {}\n  }\n}")

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

	req.Header.Add("x-velt-api-key", "<x-velt-api-key>")
	req.Header.Add("x-velt-auth-token", "<x-velt-auth-token>")
	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))

}

HttpResponse<String> response = Unirest.post("https://api.velt.dev/v2/agents/version/update")
  .header("x-velt-api-key", "<x-velt-api-key>")
  .header("x-velt-auth-token", "<x-velt-auth-token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"data\": {\n    \"agentId\": \"<string>\",\n    \"rawInstructions\": \"<string>\",\n    \"instructions\": \"<string>\",\n    \"phaseTimeoutMs\": 123,\n    \"contextGathering\": {},\n    \"execution\": {},\n    \"response\": {},\n    \"postProcess\": {},\n    \"input\": {},\n    \"scope\": {},\n    \"setup\": {}\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.velt.dev/v2/agents/version/update")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["x-velt-api-key"] = '<x-velt-api-key>'
request["x-velt-auth-token"] = '<x-velt-auth-token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"data\": {\n    \"agentId\": \"<string>\",\n    \"rawInstructions\": \"<string>\",\n    \"instructions\": \"<string>\",\n    \"phaseTimeoutMs\": 123,\n    \"contextGathering\": {},\n    \"execution\": {},\n    \"response\": {},\n    \"postProcess\": {},\n    \"input\": {},\n    \"scope\": {},\n    \"setup\": {}\n  }\n}"

response = http.request(request)
puts response.read_body

{
  "result": {
    "status": "success",
    "message": "Agent version created successfully",
    "data": {
      "version": 4
    }
  }
}

Use this API to update behavioral/version fields. This creates a new version N+1 in the versions subcollection and bumps the version pointer on the root document. Only supported for custom agents.

In-flight executions stay pinned to whatever version they started on, so updating a version never disturbs a running execution.

The schema uses .passthrough(), so additional behavioral fields are forwarded to the service layer. Server-managed fields (managedBy, metadata.type, metadata.category, metadata.internal, metadata.apiKey) are rejected — see Create Agent → Server-managed fields.

Endpoint

POST https://api.velt.dev/v2/agents/version/update

Headers

x-velt-api-key · string · required

Your API key.

x-velt-auth-token · string · required

Your Auth Token.

Body

Params

data · object · required

Show properties

agentId · string · required

Custom agent ID.

rawInstructions · string

Original user-provided instructions.

instructions · string

Processed/enhanced instructions.

phaseTimeoutMs · number

Per-phase timeout in ms (positive integer).

contextGathering · object

Context gathering config. Same shape as Create Agent.

execution · object

Execution config, including executionStrategy, the strict knowledge (Memory-RAG) block, and mcpServers for the "mcp-tools" strategy. Same shape as Create Agent. Rotating an MCP/REST auth secret is done by sending the new plaintext value here; omitting it keeps the stored secret.

response · object

Response formatting config. Same shape as Create Agent.

postProcess · object

Post-processing pipeline config. Same shape as Create Agent.

input · object

Input declaration config. Same shape as Create Agent.

scope · object

Scope and targeting config. Same shape as Create Agent.

setup · object

Setup assistant metadata. Same shape as Create Agent.

Example Requests

1. Update instructions and post-processing

{
  "data": {
    "agentId": "abc123def456",
    "instructions": "Check headings use 'Inter' font. Verify #1A73E8 on all CTAs and links.",
    "postProcess": {
      "guardrails": { "enabled": true },
      "matchAndMerge": { "enabled": true }
    }
  }
}

2. Update context gathering strategies

{
  "data": {
    "agentId": "abc123def456",
    "contextGathering": {
      "strategies": ["web-page-text", "web-page-html", "web-page-screenshot"]
    }
  }
}

3. Enable cross-page via scope

{
  "data": {
    "agentId": "abc123def456",
    "scope": {
      "crossPage": {
        "enabled": true,
        "targetProperty": "brandConsistency",
        "pageDiscovery": "manual",
        "pages": ["https://example.com", "https://example.com/about"]
      }
    }
  }
}

Response

Success Response

{
  "result": {
    "status": "success",
    "message": "Agent version created successfully",
    "data": {
      "version": 4
    }
  }
}

Field	Type	Description
data.version	number	New version number after the update

Failure Response

{
  "error": {
    "message": "ERROR_MESSAGE",
    "status": "INVALID_ARGUMENT"
  }
}

Errors: INVALID_ARGUMENT (Zod validation failure or a server-managed field) / NOT_FOUND (agent does not exist).

{
  "result": {
    "status": "success",
    "message": "Agent version created successfully",
    "data": {
      "version": 4
    }
  }
}