Assign a tag - LangWatch

Python

import requests

url = "https://app.langwatch.ai/api/v1/prompts/{id}/tags/{tag}"

payload = { "versionId": "<string>" }
headers = {
    "X-Auth-Token": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PUT',
  headers: {'X-Auth-Token': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({versionId: '<string>'})
};

fetch('https://app.langwatch.ai/api/v1/prompts/{id}/tags/{tag}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

curl --request PUT \
  --url https://app.langwatch.ai/api/v1/prompts/{id}/tags/{tag} \
  --header 'Content-Type: application/json' \
  --header 'X-Auth-Token: <api-key>' \
  --data '
{
  "versionId": "<string>"
}
'

{
  "configId": "<string>",
  "versionId": "<string>",
  "tag": "<string>",
  "updatedAt": "2023-11-07T05:31:56Z"
}

{
  "error": "<string>",
  "message": "<string>"
}

{
  "error": "<string>",
  "message": "<string>"
}

{
  "error": "<string>",
  "message": "<string>"
}

{
  "error": "<string>",
  "message": "<string>"
}

{
  "error": "<string>",
  "message": "<string>"
}

PUT

api

prompts

{id}

tags

{tag}

Python

import requests

url = "https://app.langwatch.ai/api/v1/prompts/{id}/tags/{tag}"

payload = { "versionId": "<string>" }
headers = {
    "X-Auth-Token": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PUT',
  headers: {'X-Auth-Token': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({versionId: '<string>'})
};

fetch('https://app.langwatch.ai/api/v1/prompts/{id}/tags/{tag}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

curl --request PUT \
  --url https://app.langwatch.ai/api/v1/prompts/{id}/tags/{tag} \
  --header 'Content-Type: application/json' \
  --header 'X-Auth-Token: <api-key>' \
  --data '
{
  "versionId": "<string>"
}
'

{
  "configId": "<string>",
  "versionId": "<string>",
  "tag": "<string>",
  "updatedAt": "2023-11-07T05:31:56Z"
}

{
  "error": "<string>",
  "message": "<string>"
}

{
  "error": "<string>",
  "message": "<string>"
}

{
  "error": "<string>",
  "message": "<string>"
}

{
  "error": "<string>",
  "message": "<string>"
}

{
  "error": "<string>",
  "message": "<string>"
}

Authorizations

X-Auth-Token

string

header

required

Project API key for sending traces and accessing project-scoped resources. Format: sk-lw-... (no underscore). Obtain one by creating a project via the Admin API or the LangWatch UI.

Path Parameters

string

required

tag

string

required

Body

application/json

versionId

string

required

Response

Success

configId

string

required

versionId

string

required

tag

string

required

updatedAt

string<date-time>

required

Last modified on October 12, 2026