Comma

Use Comma with Amp

Amp threads are shareable inside Amp. The report the thread produced — the audit, the migration plan — needs to reach people who don't use Amp at all. Attach Comma and the agent publishes that report as a page anyone with the link can comment on.

Add Comma to Amp

Amp reads amp.mcpServers from ~/.config/amp/settings.json (user) or .amp/settings.json (workspace). The editor extensions use the same key in their settings.

{
  "amp.mcpServers": {
    "comma": {
      "url": "https://commareports.com/api/mcp",
      "headers": {
        "Authorization": "Bearer ${COMMA_API_TOKEN}"
      }
    }
  }
}

Replace comma_sk_… with a token from Settings → API tokens → New token on Comma (or export it as COMMA_API_TOKEN where the snippet reads an env var). The default scopes — reports:write, comments:read, comments:write — cover publishing and review.

amp mcp add comma https://commareports.com/api/mcp registers the URL; add the headers block in the settings file, since the add command doesn't take a header flag.

Amp gotchas

  • The key is namespaced: amp.mcpServers, not mcpServers. A bare mcpServers block is silently ignored.
  • Export COMMA_API_TOKEN in the shell that launches Amp so ${COMMA_API_TOKEN} resolves.
  • Tell the agent in AGENTS.md to publish documents to Comma and return the URL — Amp reads it on every thread.

What the agent can do

Capability Tools
Publish a report create_report, update_report, create_report_from_url
Find existing reports list_reports, search_reports, get_report, read_report
Leave / reply to comments add_comment, reply_to_comment, set_comment_status, list_comments
Ask for review, share request_review, set_report_sharing, get_report_signoffs
Manage assets upload_report_asset, list_report_assets, delete_report_asset

Amp picks the tool from the request — there are no Amp-specific commands to learn.

A workflow that sticks

  1. Ask Amp to write up the work as a self-contained HTML report and publish it to Comma. It calls create_report and returns a link.
  2. Send the link. Reviewers open a rendered page and leave comments anchored to the exact line, cell or chart they mean — no account needed to read a public link.
  3. Next session, ask Amp to address the comments. It reads the threads with list_comments, ships a revision with update_report (same URL), replies, and resolves them.

Reports belong to your workspace, not to the agent. A report published from Amp can be revised tomorrow from Claude Code or Cursor, and the link people bookmarked keeps working.

Token shape

  • Read from the COMMA_API_TOKEN environment variable, so the settings file holds no secret.
  • Scoped — you choose which actions it can take when you create it.
  • Revocable in one click from Settings → API tokens; revocation applies immediately to the REST API, the MCP server and any routines the token created.
  • Rate-limited per token.

Details in API tokens → and Scoped tokens for AI agents →.

Try it

Add the entry, generate a token, restart Amp, and ask for a report on something you worked on today. Then leave a comment on it and ask the agent what it sees.

Generate a token →

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