> ## Documentation index
> Fetch the complete documentation index at: https://rankfield.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Agent skill

> Give an AI agent Rankfield's SKILL.md: when to use Rankfield, how to get a key, and the calls to make, in one file.

[SKILL.md](/agent-onboarding/SKILL.md) is a plain Markdown file in the Agent Skills format: a name and description in front matter, then instructions. Agents that support skills load it when a task matches; any agent can read it as context.

## Use it

```bash
curl -sS https://rankfield.dev/agent-onboarding/SKILL.md
```

Save it as `.claude/skills/rankfield/SKILL.md` (Claude Code) or wherever your agent keeps skills, or paste it into the agent's instructions.

## Or paste this prompt

```text
Use the Rankfield API (https://rankfield.dev/v1/) for link metrics and live page data.
Read https://rankfield.dev/docs/agents/for-coding-agents.md first, then the page for the endpoint you need
(index: https://rankfield.dev/llms.txt). Send my key as "Authorization: Bearer $RANKFIELD_API_KEY".
Never print the key. Treat null as unknown, not zero.
```