Find Similar Records | Captain Docs

import json
import requests
BASE_URL = "https://acme.captain.dev"
API_KEY = "your_search_key"
INDEX = "products"
headers = {
    "Authorization": f"Bearer {API_KEY}",
    "Content-Type": "application/json",
}
response = requests.post(
    f"{BASE_URL}/v1/indexes/{INDEX}/similar",
    headers=headers,
    json={
        "id": "sku-10482",
        "k": 2,
    },
    timeout=30.0,
)
print(json.dumps(response.json(), indent=2))

{
  "hits": [
    {
      "id": "sku-11020",
      "title": "Targhee III Waterproof Mid Boot",
      "brand": "KEEN",
      "category": "Hiking Boots",
      "price": 150,
      "rating": 4.4,
      "image_url": "https://cdn.acme.example/img/sku-11020.jpg",
      "score": 0.884
    },
    {
      "id": "sku-10517",
      "title": "X Ultra 4 Mid GTX Hiking Boot",
      "brand": "Salomon",
      "category": "Hiking Boots",
      "price": 165,
      "rating": 4.5,
      "image_url": "https://cdn.acme.example/img/sku-10517.jpg",
      "score": 0.861
    }
  ],
  "total": 2,
  "timing": {
    "engine_ms": 5.8,
    "stages": {
      "qdrant_dense": 4.3,
      "payload": 0.7
    }
  }
}

Find records similar to one record in the same index.

Authentication

AuthorizationBearer

A search key, issued by Captain. Sent as Authorization: Bearer <key>.

AuthorizationBearer

A scoped key for one end user, minted from an issuer key that Captain issues. Sent as Authorization: Bearer <key>.

Path parameters

indexstringRequiredformat: "^[a-z0-9][a-z0-9_-]{0,47}$"

index name

Request

This endpoint expects an object.

idstringRequired

kintegerOptional<=50Defaults to 10

filterstringOptional

fieldsboolean or list of stringsOptional

Response

results

hitslist of objectsOptional

totalintegerOptional

matching records (with group_by too: records, not groups)

groupedobjectOptional

present when results are grouped. The ranking is today’s, collapsed by the field’s value over the top depth candidates (k x size x 4, at most 100)

facetsmap from strings to lists of objectsOptional

facets_exactbooleanOptional

facet_set_sizeintegerOptional

query_idstringOptional

query_understandingobjectOptional

what the engine understood. Keys appear only when they apply; keys not listed here are diagnostics and may change

constraints_removedintegerOptional

constraints: strict: hits removed because a parsed quantity failed. hits [] with this > 0 means nothing meets the query’s quantities

sortobjectOptional

search with sort: which field and over what set

pageobjectOptional

search with page or per_page

facet_queryobjectOptional

facet_statsmap from strings to objectsOptional

requestobjectOptional

timingobjectOptional