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Shared-box and connector checklist

A funded agent on a shared computer is a shared checkbook. Map connectors, credentials, and who else can sit down at the box before you leave a run overnight.

Page dated 12 September 2026

Not legal, tax, or investment advice. Agent Lane is a publisher. We do not place trades, custody assets, or operate your agents. Confirm every step on the official product page before you fund a run.

What this page is

A shared-computer risk checklist for the machine and the connectors, not a product review. The other two guides bound brokerage and crypto. This one asks who else can reach those bounds.

Map how far one leak can spend

Write four lines before you fund a run. If you cannot fill them, do not connect a spend path.

  1. Who can sit at this computer — you, a household, a coworking seat, a contractor image, a CI runner.
  2. Which agent identities live here — Cursor account, Grok account, local CLI, a second operator’s profile.
  3. Which connectors those identities can call — Robinhood MCP, a wallet signer, GitHub, Slack, filesystem, browsers.
  4. Max loss if any one of those is abused — Agentic account balance + spend-wallet balance + whatever a leaked repo or inbox is worth.

Blast radius is additive. A “read-only” brokerage connector plus a live x402 signer plus an unlocked laptop is one incident, not three products.

Shared computers

  • Other local users. A second OS account can still read world-readable files, leftover downloads, and some browser profiles. Do not store a spend key or a Robinhood session under a shared login.
  • Unlocked sessions. A funded agent with a live MCP token in an unlocked Cursor or browser window is already authorized. Lock the box. Close the session when you stand up.
  • Clipboard and screenshots. Seed phrases, OAuth redirects, and account numbers survive in clipboard managers and screenshot folders. Clear both after onboarding.
  • Remote desktop and screen share. A share that shows an authenticated Grok connector or a Cursor MCP panel is a live credential. Treat it like handing over the phone.
  • Borrowed or lab machines. Do not open an Agentic account or fund a spend wallet on hardware you will give back. If you already did, disconnect the MCP, rotate what you can, and move the funds.

Cursor connectors

  • Tools & MCPs. List every connected server. The official Robinhood URL ishttps://agent.robinhood.com/mcp/trading. Anything that asks you to paste a Robinhood password into a third-party binary is a different, worse design.
  • Project trust. A trusted workspace can load rules, tasks, and .env files. Do not trust a cloned repo that tells the agent to skip review or to export keys.
  • Always-on rules. The review-before-place rule belongs here. So does “never send a private key to chat.” A rule file a collaborator can overwrite is not a control unless you notice the diff.
  • Local files. .env, .dev.vars, exported chat logs, and MCP auth caches are credentials. Keep them out of git. Keep them off shared disks.

Grok connectors

  • Custom connectors. A Grok custom connector to Robinhood or to a payer is account-scoped. A shared Grok login is a shared brokerage and payment path.
  • Chat history. Tool results can include account numbers, quotes, and payment receipts. Do not paste those threads into another model, a ticket, or a group chat.
  • Mobile vs desktop. Robinhood says Agentic onboarding and agent authentication are desktop steps. Do not finish funding on a phone you pass around.

Credentials

  • Brokerage OAuth. Finish Robinhood’s own login. If a helper asks you to export a session cookie, stop.
  • Spend-wallet keys. Prefer a signer the agent cannot dump. If a raw key is on disk, encrypt the disk and cap the wallet.
  • Cloud tokens. GitHub, Cloudflare, Vercel, and similar tokens in the same environment as a trading MCP let a confused agent combine “push this” with “buy that.” Split the environments.
  • Rotation. Disconnecting an MCP is step one. Then revoke the OAuth grant, empty the spend wallet, and rotate cloud tokens that lived on the same box.

A stop procedure

When something feels wrong, do the mechanical steps in this order:

  1. Disconnect Robinhood and any payer MCP from Cursor and Grok.
  2. Lock or sign out of the agent products on that computer.
  3. In the brokerage app, review open orders and the Agentic balance. Cancel what you can.
  4. Move leftover funds off the spend wallet to a wallet the agent cannot sign.
  5. Revoke OAuth grants and rotate tokens that lived beside those connectors.
  6. Only then debug the prompt. Debugging while the pipe is still open is how a second fill lands.

What Agent Lane does not do here

  • We do not audit your machine or your MCP list.
  • We do not sell an endpoint-protection product.
  • We do not claim a shared family computer can be made safe for a funded agent. The honest move is often “do not fund it there.”

Official product links

Sources

Connector steps restated from Robinhood’s Agentic Trading overview, read 12 September 2026. Buyer-side payment risk is the operator’s, as described in the x402 buyer docs. This checklist is editorial. It is not a claim that we inspected your setup.