Helicone is an open-source LLM observability platform and AI gateway that helps developers monitor, evaluate, and experiment with their AI applications. The worlds fastest-growing AI companies rely on Helicone to route, debug, and analyze their applications. With a single line of code, Helicone provides unified request logging, cost tracking, latency analysis, prompt management, experiments, evaluations, session tracing, caching, rate limiting, and webhooks across 100+ AI models from providers including OpenAI, Anthropic, Google, Groq, and more. The platform offers an OpenAI-compatible AI Gateway with automatic provider fallbacks, zero markup pricing, and built-in observability. Helicone is SOC 2 and GDPR compliant, supports self-hosting via Docker and Kubernetes, and offers a generous free tier of 10,000 requests per month.
URL: Visit APIs.json URL
- Type: Index
- Position: Consuming
- Access: 3rd-Party
- AI Gateways, Gateways, LLM Routing, LLM Observability, AI Monitoring, Prompt Management
- Created: 2026-01-02
- Modified: 2026-04-28
Helicone is an open-source LLM observability platform and AI gateway. The worlds fastest-growing AI companies rely on Helicone to route, debug, and analyze their applications. With one line of code, developers can monitor, evaluate, and experiment across 100+ AI models from providers including OpenAI, Anthropic, Google, and more. The platform provides unified request logging, cost tracking, latency analysis, prompt management, experiments, evaluations, sessions tracing, caching, rate limiting, and webhooks. Helicone is SOC 2 and GDPR compliant with a generous free tier of 10,000 requests per month.
Human URL: https://www.helicone.ai/
- AI Gateways, Gateways, LLM Routing
- Documentation
- Documentation
- GettingStarted
- PlatformOverview
- SignUp
- Login
- Portal
- DeveloperPortal
- Pricing
- OpenAPI
- APIReference
- Headers
- GitHubOrg
- Blog
- ChangeLog
- StatusPage
- Contact
- Community
- Discord
- PrivacyPolicy
- TermsOfService
- Security
- SelfHosted
The Helicone AI Gateway API provides OpenAI-compatible endpoints for routing requests to 100+ AI models across providers including OpenAI, Anthropic, Google, Groq, and more. It offers a unified API with automatic provider fallbacks, zero markup pricing, built-in observability, intelligent routing, prompt caching, error handling, and image generation support.
Human URL: https://docs.helicone.ai/gateway/overview
- AI Gateways, LLM Routing, Chat Completions, AI Models
The Helicone Request API allows developers to query, retrieve, and manage LLM request data. Endpoints include querying requests with filters, retrieving requests by IDs, submitting feedback and scores, uploading request assets, and updating request properties.
Human URL: https://docs.helicone.ai/rest/request/post-v1requestquery
- Requests, LLM Observability, Analytics
The Helicone Prompt API provides endpoints for creating, querying, updating, and deleting prompts and prompt versions. It supports prompt environments, tagging, versioning, and production deployment workflows for managing prompts across the development lifecycle.
Human URL: https://docs.helicone.ai/rest/prompts/post-v1prompt-2025
- Prompts, Prompt Management, Versioning
The Helicone Experiment API enables developers to create experiment datasets, run evaluators, update experiment metadata, and manage experiment workflows. It supports systematic prompt experimentation and evaluation to optimize AI application performance.
Human URL: https://docs.helicone.ai/features/experiments
- Experiments, Datasets, Evaluations
The Helicone Evals API provides endpoints for creating evaluations, querying evaluation results, retrieving scores, and analyzing score distributions. It enables developers to systematically assess and monitor the quality of their AI model outputs.
Human URL: https://docs.helicone.ai/rest/evals/post-v1evals
- Evaluations, Scoring, LLM Quality
The Helicone Session API allows developers to query sessions, retrieve session metrics, and submit session feedback. Sessions enable tracing and debugging of multi-step LLM interactions and agent workflows in real time.
Human URL: https://docs.helicone.ai/features/sessions
- Sessions, Tracing, Debugging
The Helicone User API provides endpoints for querying user data, retrieving user metrics, and getting user metrics overviews. It enables developers to track per-user usage, costs, and performance analytics across their AI applications.
Human URL: https://docs.helicone.ai/features/advanced-usage/user-metrics
- Users, Metrics, Analytics
The Helicone Webhook API provides endpoints for creating, listing, and deleting webhooks. Webhooks enable developers to receive real-time notifications about events in their Helicone workspace, supporting integration with external systems and automated workflows.
Human URL: https://docs.helicone.ai/features/webhooks
- Webhooks, Events, Notifications
The Helicone Model Registry API provides a public endpoint for retrieving the complete catalog of AI models and provider endpoints that the Helicone AI Gateway can route to. This allows developers to discover available models and their capabilities.
Human URL: https://docs.helicone.ai/rest/models/get-v1public-model-registry-models
- Models, AI Models, Registry
The Helicone Trace API provides endpoints for logging traces from AI applications. It enables developers to capture and log multi-step interactions, tool calls, and agent workflows for observability and debugging purposes.
Human URL: https://docs.helicone.ai/rest/trace/post-v1tracelog
- Tracing, Logging, Observability
The Helicone Dashboard API provides endpoints for querying dashboard scores and analytics data. It supports programmatic access to the aggregated metrics and scoring data available in the Helicone dashboard interface.
Human URL: https://docs.helicone.ai/rest/dashboard/post-v1dashboardscoresquery
- Dashboard, Analytics, Scoring
The Helicone Property API provides endpoints for querying custom properties attached to requests. Custom properties allow developers to segment and filter their LLM request data by arbitrary metadata such as environment, feature, user cohort, or any other dimension.
Human URL: https://docs.helicone.ai/features/advanced-usage/custom-properties
- Properties, Custom Properties, Metadata
- Documentation
- GettingStarted
- SignUp
- Login
- Portal
- Pricing
- GitHubOrg
- Blog
- ChangeLog
- StatusPage
- Contact
- Community
- Discord
- PrivacyPolicy
- TermsOfService
- Security
- SelfHosted
- OpenSource
FN: Kin Lane
Email: kin@apievangelist.com