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Get an API key, install the OpenAI client, and send a screenshot. The reply tells you what the model sees and what it would click. Model IDs, pricing, and tiers are on the introduction.
1

Get an API key

Generate a key on H Platform and export it. The free tier needs no credit card. Add credits for higher limits and the paid models: holo4-27b, holo4-35b-a3b, and holo3-122b-a10b. The examples below use holo4-27b; on the free tier, set model to holo3-1-35b-a3b.
2

Install the OpenAI client

The API is OpenAI-compatible, so the official client works as is. Only the base_url changes.
3

Send a screenshot

Point the client at H, then send an image and a question.
Images can be a URL or a base64 data URI. Swap model for any ID on the Models page, or list what your key can reach with GET /v1/models.

Next steps

Build an agent

Multi-turn. Conversation and observations in, the next tool call out.

Cookbooks

Runnable agents for a browser, a code runner, and MCP servers.

Element localization

Single-turn. A screenshot and a target description in, click coordinates out.

Document OCR

Single-turn. A page image in, its full text out.

API reference

Endpoints, request and response shapes, errors, and rate limits.

Local inference

Run the open weights on your own hardware.