Helicone

Helicone is an open-source observability and monitoring platform for LLM applications. The homepage states "The world's fastest-growing AI companies rely on Helicone to route, debug, and analyze their applications." Beyond observability dashboards (requests, segments, sessions, users), it offers prompt management, datasets, a playground, rate-limit tracking, and alerts. LLM-as-a-judge style evaluation runs against captured request logs.

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"
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.

API entry from apis.yml

apis.yml Raw ↑
name: Helicone
description: Helicone is an open-source observability and monitoring platform for LLM applications. The
  homepage states "The world's fastest-growing AI companies rely on Helicone to route, debug, and analyze
  their applications." Beyond observability dashboards (requests, segments, sessions, users), it offers
  prompt management, datasets, a playground, rate-limit tracking, and alerts. LLM-as-a-judge style evaluation
  runs against captured request logs.
humanURL: https://www.helicone.ai/
baseURL: https://api.helicone.ai
tags:
- Open-Source
- Observability
- Proxy
- Prompt Management
- Y Combinator
tags_raw:
- Open Source
- Observability
- Proxy
- Prompt Management
- Y Combinator
properties:
- type: Documentation
  url: https://docs.helicone.ai/
- type: GitHubRepository
  url: https://github.com/Helicone/helicone
- type: Pricing
  url: https://www.helicone.ai/pricing