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POST/api/v1/prompts/ab-tests

Create an A/B test, route a request, or check for a winner

Action-discriminated in-memory A/B test manager. action='create' starts a test with 2-20 variants; action='route' selects a variant for a request; action='check-winner' evaluates statistical significance.

Authentication

Send Authorization: Bearer YOUR_API_KEY on every request. Generate API keys at /dashboard/api-keys.

Request body required

Schema
{
  "application/json": {
    "schema": {
      "oneOf": [
        {
          "type": "object",
          "properties": {
            "action": {
              "type": "string",
              "enum": [
                "create"
              ]
            },
            "name": {
              "type": "string",
              "minLength": 1,
              "maxLength": 200
            },
            "promptId": {
              "type": "string",
              "minLength": 1,
              "maxLength": 200
            },
            "variants": {
              "minItems": 2,
              "maxItems": 20,
              "type": "array",
              "items": {}
            },
            "trafficSplit": {},
            "winnerCriteria": {
              "type": "object",
              "additionalProperties": {}
            }
          },
          "required": [
            "action",
            "name",
            "promptId",
            "variants"
          ],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "action": {
              "type": "string",
              "enum": [
                "route"
              ]
            },
            "testId": {
              "type": "string",
              "minLength": 1,
              "maxLength": 200
            },
            "requestId": {
              "type": "string",
              "minLength": 1,
              "maxLength": 200
            }
          },
          "required": [
            "action",
            "testId",
            "requestId"
          ],
          "additionalProperties": false
        },
        {
          "type": "object",
          "properties": {
            "action": {
              "type": "string",
              "enum": [
                "check-winner"
              ]
            },
            "testId": {
              "type": "string",
              "minLength": 1,
              "maxLength": 200
            }
          },
          "required": [
            "action",
            "testId"
          ],
          "additionalProperties": false
        }
      ]
    }
  }
}

Response

200 example

{
  "success": true
}

All status codes

200Routed variant or winner-check result.
201Test created.
400(no description)
401(no description)
404Test not found (route/check-winner).
429(no description)

Code samples

cURL

curl -X POST \
  https://evalguard.ai/api/v1/prompts/ab-tests \
  -H "Authorization: Bearer $EVALGUARD_API_KEY" \

TypeScript

import { EvalGuard } from "@evalguard/sdk";

const client = new EvalGuard({ apiKey: process.env.EVALGUARD_API_KEY });

const response = await client.request({
  method: "POST",
  path: "/api/v1/prompts/ab-tests",
});
console.log(response);

Python

from evalguard import EvalGuard
import os

client = EvalGuard(api_key=os.environ["EVALGUARD_API_KEY"])

response = client.request(method="POST", path="/api/v1/prompts/ab-tests")
print(response)

Go

package main

import (
	"context"
	"fmt"
	"net/http"
	"os"
)

func main() {
	req, _ := http.NewRequestWithContext(context.Background(), "POST", "https://evalguard.ai/api/v1/prompts/ab-tests", nil)
	req.Header.Set("Authorization", "Bearer "+os.Getenv("EVALGUARD_API_KEY"))
	resp, err := http.DefaultClient.Do(req)
	if err != nil { panic(err) }
	defer resp.Body.Close()
	fmt.Println(resp.Status)
}

Errors

400401404429

Other Prompts endpoints