haggl.ai
Negotiate personalized discounts with merchants' AI sales agents, then checkout with the deal.
haggl.ai connects Muse to merchants running AI sales agents that negotiate prices. Search participating vendors, request a quote with your context, review the offer, and accept to get a checkout link. Vendors fund offers within their limits.
Try asking Muse: "Find me a better price on a tennis racket from stores that negotiate through haggl.ai."
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Source: Found in the official MCP Registry (ai.haggl/haggl) · First listed October 29, 2026
Last 24 hours
Each bar is one check, every 15 minutes. Green means it answered. Last checked 2 h ago.
Is it safe to connect?
What Muse can see: It does not ask you to sign in, so it cannot see your accounts. It only sees what Muse sends it from your request.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
musedirectory.ai is not part of Meta. More about how Muse handles your information
How to add it to Muse
Not in Muse's Connectors list yet, but Muse can still use it. Copy the request below and paste it into Muse. Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
https://www.haggl.ai/api/mcpNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
Also use it in ChatGPT or Claude
haggl.ai is a remote MCP server, so any assistant that can add a custom connector by link can use it. Same link, same tools.
Add it to ChatGPT
- 1
Open ChatGPT settings
In ChatGPT, open Settings, then Connectors (called Apps & Connectors on some accounts).
- 2
Turn on developer mode
Under Advanced settings, switch on Developer mode. That is what lets you add a connector by link.
- 3
Create the connector
Choose Create, give it a name, paste the link as the MCP server URL, and save. If it needs a sign-in, ChatGPT asks for it here.
- 4
Use it in a chat
Start a chat, open the tools menu, pick the connector, and ask. ChatGPT asks before it runs a tool the first time.
Custom connectors need a paid ChatGPT plan, and on Team, Enterprise and Edu accounts only an admin can add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in ChatGPT
Add it to Claude
- 1
Open Claude settings
In Claude, open Settings, then Connectors.
- 2
Add a custom connector
Choose Add custom connector, give it a name, and paste the link.
- 3
Connect and use it
If it needs a sign-in, Claude sends you to it. Then turn the connector on in a chat from the tools menu and ask.
Custom connectors are available on paid Claude plans; on Team and Enterprise accounts an admin may need to add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in Claude
https://www.haggl.ai/api/mcpWhat people ask Muse to do
Technical details: safety screening, tools, response time and recent checks
Response time at the last check: 396ms. Worked in n/a of checks over 30 days.
Screening · October 29, 2026
Screened, no issues found
Screening looks for known threats and hidden instructions at the time of the check, and runs again weekly and whenever the tool list changes. It cannot see the server's code, so only connect what you need and review what Muse asks to do. How screening works.
Tools · 11
haggl_list_vendorsList vendors that accept AI-agent price negotiations through haggl.ai. A vendor appears once haggl.ai is installed on its own store or website (the listed website): the haggl.ai Shopify app on that store, or its snippet detected on that site. Vendors can opt out, so the list is nhaggl_start_negotiationStart a price negotiation with a vendor. Returns contextual guidance, current permitted actions and a new session with a session id. No customer-profile selection is required. Skip this tool if REST initialization already returned a session; pass that session.id directly to hagglhaggl_search_catalogSearch a vendor's catalog so the offer can name exact products, then follow the how_to_ask field of the result. A store catalog returns products with a handle, price and collections: ask with ask.items [{ product_handle, quantity }]. A campaign catalog returns eligible variants whaggl_get_negotiationRead the canonical state, current offer version, guidance and permitted actions of an existing negotiation. Use after human changes, reloads, transport switches or uncertain results; this does not open another session.haggl_submit_offerRequest a quote using all context already available. Buyer data and evidence can be omitted; relevant additional context can be supplied later within the remaining rounds. Returns authorized terms or no offer, contextual guidance and permitted next actions.haggl_accept_offerAccept the vendor's offer and lock in the deal. Consequential: only call after the buyer has approved this exact offer, every time. Provide the offer version the buyer reviewed and approved; a changed offer needs a new approval. Read state.acceptance_effects and state.commits_purhaggl_search_discountsFind merchants that run a sales agent on haggl.ai, by business name, website or kind of product. Only when the user asks for a discount, a coupon, a promo code or a lower price; a purchase at the listed price is not a request for one. Returns matching merchants with a vendor_id fhaggl_create_haggl_idCreate a haggl ID for the user, so offers and codes from different merchants stay together and can be read back later. Show the user this text first, and call this only if they agree: "haggl.ai, operated by MOOJO.ID, INC. ("we"), offers your agent a haggl ID. You can decline: youhaggl_request_haggl_id_confirmationGet a link for the user to read the haggl ID consent text and confirm it on haggl.ai, when they are not in this conversation to agree to it. Send them confirm_url (valid 30 minutes). After they confirm, call haggl_create_haggl_id with the returned confirmation; until then it answhaggl_get_my_offersRead what haggl.ai holds for the user's haggl ID: when it was created and the negotiations, offers and codes linked to it, newest first.haggl_delete_haggl_idDelete the user's haggl ID and unlink the offers linked to it. Only when the user asks. Codes already issued keep working at the merchant until they expire.Link
https://www.haggl.ai/api/mcpQuestions about haggl.ai in Muse
How do I connect haggl.ai to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use haggl.ai to help me. It is a free service with an MCP server at https://www.haggl.ai/api/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
Is haggl.ai working right now?
At the last check (October 29, 2026, 10:01 UTC) the endpoint was working, answering in 396ms. It is checked every 15 minutes.
Is haggl.ai safe to connect to Muse?
It was screened on October 29, 2026 with the result "screened, no issues found". Screening checks the domain against threat feeds and reads the tools for hidden instructions and requests for passwords or card numbers. It cannot see the server's code, so grant only the access you need.
What can haggl.ai do in Muse?
It exposes 11 tools, including haggl_list_vendors, haggl_start_negotiation, haggl_search_catalog, haggl_get_negotiation. For example, you could ask Muse: "Find me a better price on a tennis racket from stores that negotiate through haggl.ai."
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