What AI agents can do

• Search and view listings. No key, no approval.
• Make an offer and check an offer. You approve each offer, unless you set a standing approval limit on your Agent page.
• Save searches. You get an email when a match is listed.
• Send vintage to CashForVintage.com. You approve it first.
• List your space on VintagePopup.com. You approve it, then our team reviews it.
• Book an ad spot. You approve it and pay by card.
• Check any request to see where it stands.

1. Make a Buy & Sell AI account at Sign up and sign in.
2. Connect your agent. The easiest way is the sign-in connection address in Connect your agent below: you log in, press Allow, and your agent gets its own key. Or create a key on the Agent page and give it to your agent.
3. Ask your agent in plain words. Each example below shows what to say.
4. When your agent prepares something, watch your email, open the Agent page, and press Approve or Reject.

Say to your agent: “Find vintage cameras under $200 on Buy & Sell AI.”

1. The agent searches by words, category and highest price.
2. It opens a listing to read the description, condition, shipping and photos.
3. No key and no approval needed.

Say to your agent: “Offer $40 for the Pentax camera, and I would go up to $45.”

1. The agent picks the listing and sends your opening offer, and optionally the most you would pay.
2. You get an email. Open the Agent page and press Approve or Reject. Offers expire after 24 hours. If you set a standing approval limit on the Agent page, offers at or under it skip this step.
3. After you approve, the offer goes to the seller. If it meets the seller's minimum, the Pay Now link is sent right away and you have 15 minutes to pay.
4. Your payment is held while the item ships. After delivery you have 3 days to check it before the seller is paid.

An agent cannot offer on its owner's own listing.

Say to your agent: “What happened with my offer on the Pentax camera?”

1. The agent asks about the offer it made.
2. It answers waiting, approved, rejected or expired, and the result of the deal. When the seller accepts, it also gives the checkout link and the time left to pay.

Say to your agent: “Tell me when a zebra lamp is listed.”

1. The agent saves the words to search for. You can keep up to 10.
2. No approval needed.
3. When a matching listing goes live, you get an email.
4. Ask your agent to list your saved searches, or to remove one.

Say to your agent: “Send my three vintage lamps to CashForVintage.com. Here are the photo links and my asking prices.”

1. Give your agent, for each piece (up to 10): a public https link to one photo, a short description and your asking price in dollars. Add your name, and optionally your phone and city.
2. The agent sends it. Buy & Sell AI downloads the photos.
3. You get an email. On the Agent page, under Requests waiting for you, check the pieces and photos.
4. Tick "I confirm these items are mine to sell," then press Approve and send. Or press Reject.
5. It then goes to our team, the same as the CashForVintage.com form on the website. We reply to your account email.

Photos only, no video. Your agent cannot use a different email.

Say to your agent: “List my shop on VintagePopup.com so vintage sellers can rent space there.”

1. Give your agent the space name, the type (shop, cafe, gallery, venue, rental, market, other), the city and state, and a description of at least a couple of sentences. Optionally add what you offer sellers, your website, Instagram and phone. Add your name and 1 to 10 public https photo links.
2. The agent sends it.
3. You get an email. On the Agent page, check the details and photos, tick "I confirm I own or manage this space," then press Approve and send.
4. Our team reviews every space before it goes live, usually within a couple of days.
5. VintagePopup.com emails you a private manage link. Keep it: your agent needs it to book ads for this space.

Say to your agent: “Book the homepage banner on VintagePopup.com for 14 days starting November 20.”

1. You need a space listed with your account email, and its private manage link. Give the link to your agent.
2. Tell your agent which spot, the start date (at least 2 days from today), and how long (7, 14, 30 days). Add a headline, one line of text (the homepage banner has none), an optional https link, and a public https link to the picture. We crop the picture to the spot's size.
3. The agent checks the dates right away and tells you if they are taken.
4. You get an email. On the Agent page, check the ad, the dates and the price, tick the approval box, then press Approve and pay.
5. You go to a secure card page. Your dates are held for 35 minutes while you pay.
6. We review every ad. If it is not approved, you get a full refund.

Spots and prices: Homepage banner $18.75 a day (970 × 250); Featured space $12.50 a day (1200 × 900); In-feed card $6.25 a day (1200 × 675); Home page tile (top) $15.00 a day (1000 × 1600); Home page tile (lower) $15.00 a day (1000 × 1600); Marketplace card $6.25 a day (1200 × 900). See where each spot appears.

Say to your agent: “Did my CashForVintage.com request go through?”

1. The agent asks about a request it made, using the request number it was given.
2. It answers waiting, approved, rejected, expired or failed.

Requests wait 48 hours for your approval, and you can have up to 5 waiting at once.

• Disputes.
• Releasing a payment.
• Listing photos and video. They are filmed live, so every item is real.

1. The owner has a Buy & Sell AI account.
2. The owner creates a key on the Agent page and gives it to their agent.
3. The agent searches listings and proposes an offer.
4. The owner gets an email and approves or rejects the offer on the Agent page. Offers expire after 24 hours. If the owner set a standing approval limit, offers at or under it are sent without approval.
5. After approval, the deal runs on Buy & Sell AI: if the offer meets the seller's minimum, the Pay Now link is sent right away, the owner has 15 minutes to pay, and the payment is held while the item ships. After delivery, the buyer has 3 days to check it before the seller is paid.

• Meta Muse: we could not find a published way to add an MCP connector in the Muse app itself. Muse Code, Meta's coding agent, can add remote MCP servers: use the sign-in connection address below, log in to Buy & Sell AI and press Allow. Other services report that Muse Code also reads MCP servers from its settings file (type streamable_http, with our connection address and your key as a Bearer header). We have not tested that yet. In the Muse app, you can ask Muse to set up a connection to our web API below. Tell us how it goes.
• Grok: on grok.com/connectors, choose New Connector, then Custom, and enter the MCP address below. Grok says it asks for any authentication the server needs.
• Instinct (instinct.com): it is a personal agent you text, and we don't know of an Instinct connector yet. It can read the public listings at buyandsellai.com. Offers still need your key or a sign-in on the site.
• Claude: add a custom connector and use the sign-in connection address below. You log in to Buy & Sell AI and press Allow.
• Claude Duet (Anthropic's new personal agent, a research preview with a waitlist for Claude Pro and Max subscribers in the US): we haven't confirmed how Duet adds connectors. Once you have access, try the sign-in connection address below, and tell us how it goes.
• Grok Bot: it can call MCP servers. In the desktop app, open Settings, then Plugins, and add the MCP address below (our server is reachable from the internet, which Grok Bot needs). If it asks you to sign in, use the sign-in connection address instead. We haven't tested it yet.
• OpenAI Dots, Gemini Spark, Manus and OpenClaw: we haven't tested these yet. Use whichever of the three addresses below your agent accepts.
• Any other agent: use the MCP address, the sign-in address, or the web API below.

• search_listings: words, category, maximum price, how many. No key needed.
• get_listing: one listing with description, condition, shipping and photos. No key needed.
• make_offer: listing id, opening offer in cents, optional highest price. Needs the key. Waits for the owner.
• check_offer: waiting, approved, rejected or expired, and the deal result. When the seller accepts, it also returns checkout_url and pay_by. Needs the key.
• save_search, list_saved_searches, remove_saved_search: saved searches with an email when a match is listed. Needs the key.
• submit_cash_for_vintage: pieces with photo links, descriptions and asking prices. Needs the key. Waits for the owner.
• submit_popup_space: a space for VintagePopup.com with photo links. Needs the key. Waits for the owner.
• book_popup_ad: an ad spot for one of the owner's spaces. Needs the key. Waits for the owner, who then pays by card.
• check_request: where a request stands. Needs the key.

• 60 requests per minute. Up to 10 offers waiting for approval at once and 30 agent offers a day.
• Other requests (CashForVintage.com, spaces, ads) wait 48 hours for your approval. You can have up to 5 waiting at once.
• Photos are sent as public https links, which we download. No video.
• Your account email is always the one used. An agent cannot use a different email.
• An agent cannot offer on its owner's own listing.
• Keys act only for the account that created them. The owner can revoke a key at any time.
• Agents follow the same rules as everyone: false listings and abuse lead to strikes, suspension or a lifetime ban for the owner.
• Pickup locations are never shown publicly. The buyer gets the pickup area after the sale is paid for.