Tethered Trust

Connect Remote server

claude mcp add --transport http tethered-trust https://tetheredtrust.com/mcp --header "Authorization: Bearer <YOUR_API_KEY>"

{
  "mcpServers": {
    "tethered-trust": {
      "url": "https://tetheredtrust.com/mcp",
      "headers": {
        "Authorization": "Bearer <YOUR_API_KEY>"
      }
    }
  }
}

{
  "servers": {
    "tethered-trust": {
      "type": "http",
      "url": "https://tetheredtrust.com/mcp",
      "headers": {
        "Authorization": "Bearer <YOUR_API_KEY>"
      }
    }
  }
}

Settings > Connectors > Add custom connector
URL: https://tetheredtrust.com/mcp

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools 23 found in our last check

• how_it_works

  What Tethered Trust is, what it covers, where its data comes from, pricing and terms.

• list_coverage

  Which product categories and models are in the compatibility graph, with counts. Pass a category to list its models. Covers anything that has to fit, plug in, mount, run on or charge with something someone owns. Verified catalog (specs checked against cited manufacturer sources)…

• check_cart_before_checkout

  Checks a cart at checkout. Takes the checkout session exactly as a commerce protocol returns it (a UCP checkout or an ACP CheckoutSession) or plain line items, plus what the customer already owns. Returns a decision per line item, safe_to_checkout, an action (proceed, resolve_co…

• identify_product

  Call this when the person gives a shop link, ASIN, barcode or vague product name and you need the exact model and what it's compatible with. Identify a product from a URL, model number, SKU, ASIN, UPC/EAN or description, and get its compatibility profile: the standards it takes…

• list_standards

  Call this before sending products described by their specs instead of model numbers (e.g. specs_from or a custom product), or to map your own catalog fields onto ours: returns every standard family with its reviewed values (lens mounts, battery platforms, memory types, connector…

• resolve_product

  Call this to confirm exactly which model the person means before checking or buying ("which Galaxy S25 is this?") or to read a product's structured specs: looks it up by name or model number and returns its specs, what it accepts (mounts, battery platforms, cartridges, protocols…

• validate_purchase_plan

  Call this before you recommend or order two or more items that have to work together or with what the person owns (a PC build or upgrade, a camera kit, a smart-home setup, a charger plus cable). Check a whole purchase before recommending or ordering it: the setup the person owns…

• fix_purchase_plan

  When a plan comes back incompatible or conditional: the smallest set of changes that makes it work (swap a part for a verified one that fits everything else, add a missing cooler, hub or adapter, trim quantities that exceed slots), re-validated, with the reason for each change.…

• plan_upgrade

  Call this when the person asks what they can upgrade or add to a device they own ("can I add more RAM to my laptop", "what SSD does my PC take", "what GPU fits my case") before suggesting parts: returns memory type, slots and maximum, M.2 slots, lengths and PCIe generation, powe…

• identify_from_photo

  Read the brand, model and part numbers from a photo of a label or nameplate and match them to products. Matches are returned as candidates, with what was read. The photo isn't stored.

• recheck_plan

  Re-run a saved purchase plan against today's data before ordering, and see what changed since it was issued: decisions, product records, or receipt status.

• check_batch

  Up to 25 independent compatibility checks in one call (e.g. ranking candidate products for one device). Each result has its own decision, evidence and receipt.

• check_compatibility

  Call this whenever you're about to recommend, link to or buy a part, accessory, charger, filter, cartridge, lens, battery, memory, mount or adapter for something the person already owns, or they ask "will X work with Y" / "is this compatible". Pass both exact models. Covers anyt…

• find_parts

  Call this when the person names a device or appliance they own and needs a replacement or add-on ("what filter does my fridge take", "which RAM can I add", "what battery fits my drill") before you search shops or guess. Which parts and accessories fit this model? OEM parts first…

• check_recalls

  Call this before recommending, buying or selling anything used or secondhand, any baby or kids' product, appliance, heater, battery-powered device or vehicle, or when the person asks if something is safe or recalled. Searches US government recall notices: CPSC for consumer produ…

• watch_decision

  Call this after a compatibility check, purchase plan, verify_page or verify_mcp result that someone will rely on later (an order next week, an install, a resale, the next agent in a handoff). For product decisions we watch the records, manufacturer sources and US recall notices…

• attach_order

  Call this right after placing an order you checked with check_cart_before_checkout, validate_purchase_plan or check_compatibility: link the receipt_id to the order number, AP2 cart or intent mandate, ACP checkout session, UCP checkout or payment reference. This makes a Decision…

• dispute_packet

  Call this when an agent purchase is disputed, returned as wrong, or charged back and a Tethered Trust receipt exists for it: we assemble the evidence (the decision, products checked, sources with dates, the linked order or mandate, records and recall notices that changed since,…

• file_claim

  Call this when a product we said would work didn't (within 60 days of the check): send the receipt_id and what happened. Decided within 10 business days; if our answer or data was wrong, the fee paid for that check is refunded and the data corrected. Free. For a plain fit/no-fit…

• decision_status

  Call this right before acting on a watched decision: still_holds, changed (a record it rested on was updated), recall_on_record (a recall notice names one of the products), or expired, with what changed and what isn't monitored.

• check_fit

  Will this appliance physically fit this space? Compares dimensions plus typical installation clearances and required connections (power, water, gas).

• verify_receipt

  Check a Tethered Trust receipt: is the signature ours, is it still within valid_until, and have the records behind it changed since? A valid receipt proves what we said and when; it doesn't guarantee the verdict was right.

• report_outcome

  After a purchase, report whether it actually fit. Free, safe to call, and only the first report per check counts. Reports are weighted by level: self_reported (website), agent_reported (anonymous API/MCP), partner_reported (API key holders) and order_confirmed (order evidence we…

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