Dot product of vectors API

Returns the inner (dot) product of two vectors — the raw unnormalized similarity used by many ANN indexes. Answers 'What is the dot product of these vectors?', 'What is the inner-product similarity score?'.

Price$0.01per request

MethodPOST

Route/v1/retrieval/dot-product

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

dot-productinner-productvectorembeddingsimilarityretrievalrag

API URLhttps://x402.hexl.dev/v1/retrieval/dot-product

Integration docs

Example request

{
  "a": [
    1,
    2,
    3
  ],
  "b": [
    4,
    5,
    6
  ]
}

Example response

{
  "dotProduct": 32,
  "dimensions": 3,
  "formula": "sum(a_i * b_i)"
}

Input schema

{
  "type": "object",
  "required": [
    "a",
    "b"
  ],
  "properties": {
    "a": {
      "type": "array",
      "items": {
        "type": "number"
      }
    },
    "b": {
      "type": "array",
      "items": {
        "type": "number"
      }
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}