# Helicone OSS LLM Observability

> Probe-verified (tier 2 of 3). Last checked 2026-08-23. 4 of 5 capability checks passed.

- host: docs.helicone.ai
- url: https://docs.helicone.ai/
- category: llm observability documentation
- type: documentation
- language: en

## Probe-verified · tier 2 of 3

Probed live on 2026-08-23 against rubric v1. 4 of 5 checks passed.

- PASS — Markdown negotiation
- PASS — Markdown twin at a predictable URL
- PASS — llms.txt
- fail — API catalog
- PASS — MCP server answers

MCP tools (from tools/list on 2026-08-23, served from helicone.main-kill-isr.mintlify.me): search_helicone_oss_llm_observability, query_docs_filesystem_helicone_oss_llm_observability, submit_feedback

## Unverified actions

Read from the page's own content, with the wording each was drawn from. Inference is kept separate from tested facts; an agent completing the action is tier 3.

- **register** — "Sign up for free" → `https://helicone.ai/signup`
- **contact** — "contact help@helicone.ai" → `mailto:help@helicone.ai`
- **contact** — "join our Discord" → `https://discord.com/invite/HwUbV3Q8qz`
- **query_api** — "Helicone's AI Gateway is an OpenAI-compatible, unified API" → `https://ai-gateway.helicone.ai`

## Summary

Documentation for Helicone's AI Gateway providing unified API access to 100+ LLM models with automatic logging and observability.

## Context

4827 sites in this index share the type "documentation"; 1248 are transactional.

## How we grade

- tier 1 — **Declared**: The site says agents are welcome in its robots.txt. A permission, not a capability.
- tier 2 — **Probe-verified** (this site): We fetched the site and tested each signal ourselves. Dated, repeatable, re-checked on a schedule.
- tier 3 — **Behaviourally verified**: An agent completed the action end to end — booked, bought, submitted — and it worked.

## About this record

Known-Good probes sites live and publishes what was tested and when.
Method: https://knowngood.sh/about.md · Rubric: https://knowngood.sh/benchmark