Developers — Undercut

No public API or MCP server yet — here's what actually exists.

Honest status: there is no hosted API, no MCP server, and no SDK. The free tier is SKILL.md — a policy file your agent reads locally. There are no endpoints to call.

What exists today

Undercut ships as a single MIT-licensed skill file, not a service:

skills/firstpass/SKILL.md — the routing policy itself, plain text, readable by any agent that follows a SKILL.md convention (Claude Code, Codex, Cursor, Copilot, OpenCode).
github.com/undercutsh/firstpass — the full source: the skill, the eval harness in evals/, raw benchmark data in testing/results/, and this site.

Install it by copying the skill into your agent's skills directory, or:

npx skills add undercutsh/firstpass

That's it — no account, no API key, no network call to us. Nothing here phones home.

What doesn't exist yet

No hosted routing API. No MCP server. No SDK or client library. No webhook or telemetry endpoint. If you've seen something claiming to be an official Undercut API, it isn't ours — see the note about an unrelated third-party @undercut/cli package in the project's PR history for the kind of name collision that causes this confusion.

What's planned

Undercut's paid Teams tier — org-wide policy enforcement, savings metering, an escalation ledger, SSO — is currently in development and is the most likely place an API or MCP server would eventually live, since that's where server-side state (usage, ledgers, org policy) actually needs to exist. Nothing is built yet, and nothing here should be read as a commitment to a specific interface or timeline.

Want to hear when that ships? Join the Teams waitlist.

In the meantime

The most useful thing you can do as a developer today is read the policy file, run the eval harness yourself, or open an issue/PR against the repo:

Raw SKILL.md
Eval harness + methodology (testing/README.md)
AGENTS.md — build/test commands and repo conventions
Issues

Updated 2026-08-28. Back to Undercut · About · Privacy · Terms