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Grok Build by xAI

Grok Build answers questions about your code

People ask about your library on X. Grok Build has the repo open: with BuzzTake it finds the questions, answers each one from the code, and replies after your yes.

Get startedSet up Grok Build
Connects through
Remote MCP, OAuth sign-in
Add it with
grok mcp add
Config
~/.grok/config.toml
Also reads
.mcp.json and .cursor/mcp.json
Grok Build, sample run. Grok Build in a terminal searches X for questions about acme-sdk, finds the answers in the repo, asks to use the BuzzTake reply tool and posts two replies after the user agrees.

What Grok Build can do in your social accounts

Grok Build is xAI's coding agent in the terminal. With BuzzTake it can search X for your project's name, read each post and its replies, and answer with the line of code or the doc that settles it.

It reads .mcp.json, .cursor/mcp.json and ~/.claude.json as well as its own ~/.grok/config.toml. If BuzzTake is set up for Claude Code or Cursor on the machine, Grok Build sees it with no new step.

/loop repeats a prompt at an interval, from 60 seconds, for up to 7 days. On launch day, a loop that checks for new questions every 30 minutes keeps you ahead of them.

It works on X, Reddit, Bluesky and Mastodon, and on every other platform BuzzTake connects. Each action is one tool, named as in the actions reference.

Jobs for Grok Build

Say it in plain words. These are prompts that work, and the calls they make.

  1. Answer today's questions on X

    Grok Build searches X for the project, answers each question from the code and replies to the ones you approve.

    Search X for acme-sdk posts from today. Answer each question from this repo, and reply to the ones I approve.

    1 × search, 3 × reply28 credits ($0.28)

  2. Release notes from the terminal

    After a tag, it posts a summary of the changes to X and Bluesky.

    Post a summary of the changes since the last tag to X and Bluesky.

    2 × post20 credits ($0.20)

  3. Watch launch day with /loop

    A loop searches for new questions every 30 minutes for eight hours and drafts answers for you.

    /loop 30m Search X for acme-sdk with BuzzTake and draft answers to new questions.

    16 × search64 credits ($0.64)

  4. Answer a Reddit thread

    It reads a Reddit thread about your library and replies to the comments that misread how it works.

    Read this r/programming thread about acme-sdk and reply to the two comments that misread the retry logic.

    1 × read_post, 2 × reply20 credits ($0.20)

Set up Grok Build

Grok Build runs on your computer and reaches BuzzTake over the internet.

  1. Install Grok Build

    Skip this when it is installed.

    Terminal
    curl -fsSL https://x.ai/cli/install.sh | bash

  2. Add the server

    Add --scope project to write it to .grok/config.toml for the team.

    Terminal
    grok mcp add --transport http buzztake https://mcp.buzztake.com/mcp

  3. Sign in

    The first call opens BuzzTake in your browser. In the TUI, /mcps opens the MCP tab, where i signs in.

  4. Check it

    The doctor checks the connection and the sign-in.

    Terminal
    grok mcp doctor buzztake

Ways to connect Grok Build

The routes that reach BuzzTake from Grok Build, and how well each one fits.

Remote MCP, OAuth sign-inBest fit

OAuth in the browser on first use. The token is kept in ~/.grok/mcp_credentials.json.

Remote MCP, API keyWorks

For CI: keep the key in an environment variable and let Grok Build read it, so it never lands in the config file.

~/.grok/config.toml
[mcp_servers.buzztake]
url = "https://mcp.buzztake.com/mcp"
bearer_token_env_var = "BUZZTAKE_API_KEY"
REST APIWorks

The bash tool can run curl and read the answer.

POST /v1/accounts/{id}/actions
curl https://api.buzztake.com/v1/accounts/$ACCOUNT_ID/actions \
  -H "Authorization: Bearer $BUZZTAKE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"type": "post", "text": "Version 2.4 is out.", "wait": 60}'

What it costs

BuzzTake charges in prepaid credits for the actions it runs. One credit is one US cent.

Credits for each job on this page
JobCreditsUSD
Answer today's questions on X28$0.28
Release notes from the terminal20$0.20
Watch launch day with /loop64$0.64
Answer a Reddit thread20$0.20

A post, a quote or a message is 10 credits, a reply 8, a like or a follow 3, and a read or a search 4. A planned post costs nothing until it goes out. Reads are charged when they succeed, and a write that fails before the page changes is refunded.

Grok Build's model use is billed by xAI, not by BuzzTake. Every price is on the pricing page, and the rules are in Credits.

Approvals and safety

A person can approve before anything goes out, and every action is recorded.

Grok Build asks before tool calls by default. Auto mode lets a classifier approve safe calls when the feature is on, and Always-approve skips the questions. Deny rules always win, so deny the tools it must never call, such as delete_post.

Keep reply and post on ask. A headless grok -p run with --always-approve posts without asking, so give such runs a key without content_publish unless they must post.

  • Ask for drafts when a person must check first. create_content puts the post on the calendar, submit_for_review sends it to a reviewer, and it goes out only after the approval.
  • Give the agent an API key without the content_publish permission. It can then plan drafts and send them for review, and it cannot post by itself.
  • BuzzTake records every action: who asked, through which key, on which account, what the page returned and what it cost.
  • A sign-in step that BuzzTake cannot finish, such as a 2FA code, becomes a challenge. The agent asks you for the code, or gives you a link to a live browser where you answer it.
  • Only an owner or an administrator can allow an OAuth client. Disconnect it under Developers in the app, and its token stops working.

More in Approvals and Reports and audit.

Limits

  • xAI launched Grok Build on 25 May 2026 as an early beta for SuperGrok and X Premium+ subscribers.
  • /loop runs from every 60 seconds, ends after 7 days, and allows up to 50 loops at a time.
  • An action tool waits up to 120 seconds for its result. A longer action comes back with its id, and get_action follows it to the end.
  • The MCP server runs up to 8 requests at a time for one key or sign-in. Above that it answers 429 with Retry-After, and the client tries again.
  • One organization connects up to 200 accounts.
  • The platforms set their own pace. When one asks an account to slow down, the action ends with rate_limited, and a write that failed before the page changed is refunded.

Troubleshooting

Every error code and its fix is in Errors and challenges.

grok mcp doctor shows no sign-in
Open /mcps in the TUI and press i on buzztake.
A headless run cannot sign in
Use the key route with bearer_token_env_var. Where no browser is available, Grok Build itself signs in with XAI_API_KEY.
The client says the server refused the token (401)
The sign-in expired or was revoked, or the API key is wrong. Sign in again from the client, or make a new key under Developers.
An action stops at needs_input
The platform asked for a code. Give the code to the agent so it calls answer_challenge, or open the challenge's sign_in_url and answer in the live browser.
The answer is insufficient_credits
The balance is lower than the price, and nothing was queued. A post needs 10 credits. Top up, then ask again.
The answer is unsupported
The platform has no such action. The error lists the actions it has, and the generic browser action can do the rest step by step.
An account shows signed_out
Its session ended and no stored password could sign it in again. Ask the agent for a sign-in link with get_sign_in_link and open it, or reconnect the account in the app.

Grok Build questions

Can Grok Build reply on X for me?
Yes. With BuzzTake, Grok Build searches X, reads posts and replies through your own account, and asks before each call unless you changed its permission mode.
I set up BuzzTake for Claude Code. Do I add it again?
No. Grok Build reads ~/.claude.json, .mcp.json and .cursor/mcp.json, so an existing buzztake entry works.
What does launch-day watching cost?
A search is 4 credits. Every 30 minutes for eight hours is 16 searches, 64 credits, plus 8 for each reply sent.

Related agents

All AI agents, the MCP server docs, the quickstart, and the platforms: X Reddit Bluesky Mastodon

Grok Build is a trademark of xAI. Platform names belong to their owners. BuzzTake is not affiliated with or endorsed by xAI or any platform.

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