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.
APIs.json: https://raw.githubusercontent.com/api-evangelist/helicone/refs/heads/main/apis.yml
- Type: Index
- Position: Consumer
- Access: 3rd-Party
- AI Gateways
- AI Monitoring
- Gateways
- LLM Observability
- LLM Routing
- Prompt Management
- Created: 2026-01-02
- Modified: 2026-05-19
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.
- Human URL: https://www.helicone.ai/
- AI Gateways
- Gateways
- LLM Routing
- Documentation
- Documentation
- Getting Started
- Platform Overview
- Sign Up
- Login
- Portal
- Developer Portal
- Pricing
- OpenAPI — OpenAPI Specification
- API Reference
- Headers
- Git Hub Org
- Blog
- Changelog
- Status Page
- Contact
- Community
- Discord
- Privacy Policy
- Terms of Service
- Security
- Self Hosted
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
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
- Base URL:
https://ai-gateway.helicone.ai
- AI Gateways
- AI Models
- Chat Completions
- LLM Routing
- Documentation
- OpenAPI — OpenAPI Specification
- API Reference
- Getting Started
- Provider Routing
- Models
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
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
- Base URL:
https://api.helicone.ai
- Analytics
- LLM Observability
- Requests
- Documentation
- OpenAPI — OpenAPI Specification
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
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
- Base URL:
https://api.helicone.ai
- Prompt Management
- Prompts
- Versioning
- Documentation
- Overview
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
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
- Base URL:
https://api.helicone.ai
- Datasets
- Evaluations
- Experiments
- Documentation
- API Reference
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
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
- Base URL:
https://api.helicone.ai
- Evaluations
- LLM Quality
- Scoring
- Documentation
- Overview
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
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
- Base URL:
https://api.helicone.ai
- Debugging
- Sessions
- Tracing
- Documentation
- API Reference
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
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
- Base URL:
https://api.helicone.ai
- Analytics
- Metrics
- Users
- Documentation
- API Reference
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
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
- Base URL:
https://api.helicone.ai
- Events
- Notifications
- Webhooks
- Documentation
- API Reference
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
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
- Base URL:
https://api.helicone.ai
- AI Models
- Models
- Registry
- Documentation
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
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
- Base URL:
https://api.helicone.ai
- Logging
- Observability
- Tracing
- Documentation
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
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
- Base URL:
https://api.helicone.ai
- Analytics
- Dashboard
- Scoring
- Documentation
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
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
- Base URL:
https://api.helicone.ai
- Custom Properties
- Metadata
- Properties
- Documentation
- API Reference
- OpenAPI — OpenAPI Specification
- Postman Collection — Postman Collection 2.1
- Open Collection — Open Collection 1.0
- Documentation
- Getting Started
- Sign Up
- Login
- Portal
- Pricing
- Git Hub Org
- Blog
- Changelog
- Status Page
- Contact
- Community
- Discord
- Privacy Policy
- Terms of Service
- Security
- Self Hosted
- Open Source
- Integrations
- L L Ms Txt
FN: Kin Lane Email: kin@apievangelist.com