Helicone Experiment API

The Experiment API from Helicone — 40 operation(s) for experiment.

Operations 44

POST /v2/experiment/create/empty Create empty experiment #
POST /v2/experiment/create/from-request/{requestId} Create experiment from request #
POST /v2/experiment/new Create new experiment #
GET /v2/experiment Get experiments #
DELETE /v2/experiment/{experimentId} Delete experiment #
GET /v2/experiment/{experimentId} Get experiment by id #
POST /v2/experiment/{experimentId}/prompt-version Create new prompt version for experiment #
DELETE /v2/experiment/{experimentId}/prompt-version/{promptVersionId} Delete prompt version #
GET /v2/experiment/{experimentId}/prompt-versions Get prompt versions for experiment #
GET /v2/experiment/{experimentId}/input-keys Get input keys for experiment #
POST /v2/experiment/{experimentId}/add-manual-row Add manual row to experiment #
POST /v2/experiment/{experimentId}/add-manual-rows-batch Add manual rows to experiment batch #
DELETE /v2/experiment/{experimentId}/rows Delete experiment table rows #
POST /v2/experiment/{experimentId}/row/insert/batch Create experiment table row batch #
POST /v2/experiment/{experimentId}/row/insert/dataset/{datasetId} Create experiment table row from dataset #
POST /v2/experiment/{experimentId}/row/update Update experiment table row #
POST /v2/experiment/{experimentId}/run-hypothesis Run hypothesis #
GET /v2/experiment/{experimentId}/evaluators Get experiment evaluators #
POST /v2/experiment/{experimentId}/evaluators Create experiment evaluator #
DELETE /v2/experiment/{experimentId}/evaluators/{evaluatorId} Delete experiment evaluator #
POST /v2/experiment/{experimentId}/evaluators/run Run experiment evaluators #
GET /v2/experiment/{experimentId}/should-run-evaluators Should run evaluators #
GET /v2/experiment/{experimentId}/{promptVersionId}/scores Get experiment prompt version scores #
GET /v2/experiment/{experimentId}/{requestId}/{scoreKey} Get experiment score #
POST /v1/experiment/new-empty Create new empty experiment #
POST /v1/experiment/table/new Create new experiment table #
POST /v1/experiment/table/{experimentTableId}/query Get experiment table by id #
POST /v1/experiment/table/{experimentTableId}/metadata/query Get experiment table metadata #
POST /v1/experiment/tables/query Get experiment tables #
POST /v1/experiment/table/{experimentTableId}/cell Create experiment cell #
PATCH /v1/experiment/table/{experimentTableId}/cell Update experiment cell #
POST /v1/experiment/table/{experimentTableId}/column Create experiment column #
POST /v1/experiment/table/{experimentTableId}/row/new Create experiment table row #
DELETE /v1/experiment/table/{experimentTableId}/row/{rowIndex} Delete experiment table row #
POST /v1/experiment/table/{experimentTableId}/row/insert/batch Create experiment table row with cells batch #
POST /v1/experiment/update-meta Update experiment meta #
POST /v1/experiment Create new experiment old #
POST /v1/experiment/hypothesis Create new experiment hypothesis #
POST /v1/experiment/hypothesis/{hypothesisId}/scores/query Get experiment hypothesis scores #
GET /v1/experiment/{experimentId}/evaluators Get experiment evaluators #
POST /v1/experiment/{experimentId}/evaluators Create experiment evaluator old #
POST /v1/experiment/{experimentId}/evaluators/run Run experiment evaluators old #
DELETE /v1/experiment/{experimentId}/evaluators/{evaluatorId} Delete experiment evaluator old #
POST /v1/experiment/query Get experiments old #

Documentation

📖
Documentation
https://docs.helicone.ai/
📖
GettingStarted
https://docs.helicone.ai/getting-started/quick-start
📖
APIReference
https://docs.helicone.ai/rest/request/post-v1requestquery
📖
Documentation
https://docs.helicone.ai/gateway/overview
📖
APIReference
https://docs.helicone.ai/rest/ai-gateway/post-v1-chat-completions
📖
Documentation
https://docs.helicone.ai/rest/request/post-v1requestquery
📖
Documentation
https://docs.helicone.ai/rest/prompts/post-v1prompt-2025
📖
Documentation
https://docs.helicone.ai/features/experiments
📖
APIReference
https://docs.helicone.ai/rest/experiment/post-v1experiment-evaluatorsrun
📖
Documentation
https://docs.helicone.ai/rest/evals/post-v1evals
📖
Documentation
https://docs.helicone.ai/features/sessions
📖
APIReference
https://docs.helicone.ai/rest/session/post-v1sessionquery
📖
Documentation
https://docs.helicone.ai/features/advanced-usage/user-metrics
📖
APIReference
https://docs.helicone.ai/rest/user/post-v1userquery
📖
Documentation
https://docs.helicone.ai/features/webhooks
📖
APIReference
https://docs.helicone.ai/rest/webhooks/get-v1webhooks
📖
Documentation
https://docs.helicone.ai/rest/models/get-v1public-model-registry-models
📖
Documentation
https://docs.helicone.ai/rest/trace/post-v1tracelog
📖
Documentation
https://docs.helicone.ai/rest/dashboard/post-v1dashboardscoresquery
📖
Documentation
https://docs.helicone.ai/features/advanced-usage/custom-properties
📖
APIReference
https://docs.helicone.ai/rest/property/post-v1propertyquery

Specifications

Other Resources

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API
curl "https://apis.io/api/v1/apis/helicone:helicone-experiment-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

helicone-experiment-api-openapi.yml Raw ↑
openapi: 3.2.0
info:
  title: helicone-api Experiment API
  version: 1.0.0
  license:
    name: MIT
  contact: {}
servers:
- url: https://api.helicone.ai/
- url: http://localhost:8585/
tags:


# --- truncated at 32 KB (62 KB total) ---
# Full source: https://raw.githubusercontent.com/api-evangelist/helicone/refs/heads/main/openapi/helicone-experiment-api-openapi.yml