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How to fill a long web form in one call and submit it with Axuse

An agent sets every field of a multi-step web form and clicks submit, with typed errors on failure.

Authorization notice. Axuse is dual-use. Only use it on software, sites and systems you own or have explicit permission to test.

Who it is forAn operations or admin person who must enter the same details into a long web form for many records.

The problemFilling forms field by field takes many steps, and a single misclick can silently enter the wrong value.

The outcomeThe form is filled in one tool call and the agent gets a typed error with a retry hint if a field fails.

What you need first

  • Node.js 22 or newer
  • A Chromium-family browser (Chrome, Edge, Chromium, or Chrome for Testing), or AXUSE_BROWSER set to its path
  • git to clone the repository
  • Codex or Claude Code installed as the MCP host

Steps

  1. git clone https://github.com/ctoldigital/axuse.git
  2. cd axuse
  3. node src/cli.js print-config --harness claude-code (inferred, check the README)
  4. claude mcp add --scope user axuse -- node /abs/path/axuse/src/cli.js mcp
  5. Give the agent the form URL and the values, and ask it to confirm the values on screen before it clicks submit.

Prompt for your agent

Using the axuse MCP server, open <form URL> and fill the form with these values: <values as JSON>. Use one fill action, then read the accessibility snapshot to confirm each field holds the intended value before submitting. Report any field that returns an error code.

Caveat. The README says ax_fill can click submit, so the agent should be told to check values before submitting rather than assuming the form is correct.

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