Codemind

Codemind is a build service that a coding agent calls directly. Instead of writing code itself, your agent hands Codemind a task — a title, the acceptance criteria and the stack — and Codemind writes the code, tests it against those criteria and returns the files. A build that passes is counted as one verified build; a build that fails returns an error code and no charge. It is built for developers who already work inside coding agents such as Claude Code, Cursor, Codex and OpenCode, and who want the writing, testing and fixing to happen somewhere other than their own session and plan. Everything is designed so the agent's plan goes on planning and review, while Codemind handles the build. Coding agents typically operate in a write, run and fix loop. Every attempt, including the ones that fail, consumes tokens or plan quota, and the trial and error fills up the agent's context. While the agent is busy running that loop, it cannot move on to the next task. Codemind addresses this by moving the writing, testing and fixing to its own servers, off your plan. Rather than paying for every attempt whether the code works or not, you pay for verified builds only: a build that passes tests written from your acceptance criteria. Codemind states that it has not measured how total cost compares with an agent writing the same code itself, and that it will publish the method when available. The workflow has three steps. First, your agent sends a task containing a title, the acceptance criteria and the stack; if the criteria are too vague to test, Codemind says so before it starts. Second, Codemind writes the code and tests it against your criteria before anything comes back. Third, the files return to your agent, which writes them into your project. A build that passes counts as one verified build. The design intent is that you stay in your coding session while the writing, testing and fixing happen on Codemind's side, off your plan. Every build comes back with its result. You see whether it passed and what you were charged. A passing build produces a build receipt — for example, a task such as checking the webhook signature on POST /events in a TypeScript stack, sent from Claude Code over MCP — showing that the code was written, that it was tested against your criteria, how many files were returned and what you paid. A build that fails returns an error code and no charge; code that fails its tests does not reach your agent, so your agent can retry or do the task itself. Builds inside your free allowance cost nothing either way. Pricing is a flat rate charged only for code that works, with no seats and no tokens to count. The Free plan costs $0 and requires no card: it includes 100 verified builds in your first month, then 50 every month, with up to 2 builds at once and 20 an hour. Pay as you go costs $0.10 per verified build for builds beyond the free allowance, drawn from a prepaid balance you top up — although paid top-ups are coming soon and are not available yet. A Custom plan, by contact, offers a negotiated volume rate, reserved capacity and support. A Pro plan is coming soon at a price to be announced, adding Swarm and higher limits of up to 10 builds at once; Ship is also coming soon. If you use up the free allowance, new builds are refused with a clear message until your next month starts, and nothing is charged unless you have added a paid balance. Your free allowance counts verified builds only. Setup is designed to be run by the agent itself. A button copies a one-line prompt — read and follow the setup steps at codemindhq.dev/agent-onboarding/SKILL.md — that you paste into your coding agent. The agent adds the Codemind server to your host and asks you to reload it, and a free account is created when it connects. You then restart your agent and delegate your first task. No script runs and no key is stored, though if you restart your host, Codemind starts a new free account. You can also sign up yourself in the dashboard. If you already have a key, you can add the server by hand with a claude mcp add command that keeps your key out of the config file. Codemind's MCP endpoint is https://api.codemindhq.dev/mcp and it needs no API key; agents are instructed to call get_usage_guide before their first build_feature. The stated benefits fall into productivity and performance. On productivity, a coding model normally works through one task at a time, whereas Codemind builds run side by side on its servers — 2 at once on Free, more with Pro — so your agent can send a task and move on to the next one instead of sitting in a write, run and fix loop. Because the writing and testing happen off your plan, your tokens go on planning and review, letting your agent get more done on the same plan. On performance, a build is marked verified, and charged, only after it passes tests written from your acceptance criteria; code that fails its tests does not reach your agent; and the trial and error happens on Codemind's side, so it does not fill up your agent's context. The result is code that has already been tested coming back to your agent. Codemind works over MCP or REST, and the same builds are available from your agent or from your own code. It currently builds JavaScript and TypeScript, including Cloudflare Workers, Node and React. You can send a task to create new code, or change files you already have by sending the current file with the task and getting the complete modified file back. Your agent can also ask for a code review or a test run on its own. Beyond a single build, two larger modes are planned: Swarm, where your agent defines a set of tasks and a swarm builds them in parallel, verifies each one and tells you once when the whole set is done; and Ship, where you hand over a spec and the target repositories and Codemind splits it into tasks, builds them and delivers the result. Both are coming soon, Swarm with Pro. You can also estimate your savings through the analyze page linked from the site. Codemind is aimed at developers who use coding agents and want to delegate implementation work without leaving their session. It supports Claude Code, Cursor (tested through its agent CLI), Codex (CLI 0.160.1 or later; 0.27.0 has no remote MCP) and OpenCode, with Cline coming soon. It does not replace your coding agent: your agent still plans the work and edits your project, while Codemind takes the tasks it delegates and returns code that has already been tested. Languages other than JavaScript and TypeScript are not supported yet. Codemind keeps what it needs to run your builds and show you their results, with details on what it stores, for how long, and how to ask for export or deletion on the Privacy page. Taken together, Codemind's value proposition is straightforward: your agent's plan goes on planning and review, while a separate build service writes, tests and fixes the code and returns only what has passed. You are billed per verified build — $0.10 after a free allowance, with failed builds costing nothing — and you start with 100 verified builds in your first month without a card. Delegate your first task and see what comes back.