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Axiom

Axiom lets the model order physical products for the user from online merchants. The model places the order and relays Axiom's replies; Axiom completes the merchant's checkout on the user's behalf through the user's Axiom account, applies the user's spending rules and approval limits, and captures the receipt. The model never handles payment details.

The Axiom MCP endpoint is https://mcp.useaxiom.ai/mcp.

When to use this skill

Use Axiom when the user asks to:

• buy, order, or reorder a specific physical product with Axiom
• check which payment method Axiom has on file or whether their account is ready to order
• review recent Axiom orders, a receipt, or where an order stands

Do not use it for browsing or price comparison, subscriptions or digital goods, account settings outside the tools below, or orders the user has not clearly requested.

Authentication

For the full authentication guide, see references/authentication.md.

Quick summary:

1. Register Axiom: mcporter config add axiom --url https://mcp.useaxiom.ai/mcp
2. Start auth: mcporter auth axiom --reset --oauth-timeout 300000 --log-level info (runs in background, prints the OAuth URL)
3. Parse the OAuth authorize URL from mcporter's log output
4. Navigate to that URL with a headless browser: agent-browser open "<URL>" (or browser-use open "<URL>")
5. Read the activation URL from the rendered page: agent-browser eval "document.querySelector('a[href*=\"activate\"]')?.href"
6. Send the activation URL to the user to approve on their phone
7. mcporter completes the OAuth exchange automatically when the user approves
8. Verify: mcporter call axiom.get_payment_method

Important: The OAuth authorize URL and the activation URL are different. The agent navigates to the authorize URL; the user opens the activation URL. Never send the authorize URL to the user. See the auth doc for examples of both.

To clear cached tokens: mcporter auth axiom --reset

Placing an order and answering a question require the payments:write OAuth scope; checking and listing orders require transactions:read. If a tool is rejected for insufficient scope, reset auth and reconnect so the client requests the current scope set.

Tools at a glance

Tool	Use it to
place_order	Place an order once store, exact product, and required options are known
get_order_status	Tell the user where an order stands, when they ask
answer_order_question	Answer a question Axiom asked about an order (needs_answer)
get_payment_method	Tell the user which payment method is on file (optional before ordering)
list_orders	List recent orders and find an orderID

Parameters, return fields, and the nextAction vocabulary are in references/tool-reference.md. Worked examples are in references/examples.md.

Placing an order

Axiom completes the order with the store on the user's behalf: cart, shipping, delivery, order confirmation, and receipt, through the user's Axiom account. Orders finish in the background and Axiom emails the user for approval, questions, and the result. The model's job is to (1) make sure the request is specific enough, (2) place the order, (3) relay each response to the user, and (4) follow nextAction.

When the user has clearly asked to buy a specific item, place the order. Axiom verifies the request against the user's stated intent and spending rules, and asks the user for explicit approval whenever its rules require it. When anything about the request is unclear, ask the user first.

Step 1: Pre-flight checklist (ask first, then call)

Before calling place_order, all four must be true:

1. Store known, with an https URL. Prefer the product page URL when you have it; otherwise the store homepage. Never invent a URL.
2. Specific product known. "Acana Adult Recipe 25 lb" passes; "dog food" does not.
3. Required variants known for that product type: size and width for shoes and apparel, storage and color for electronics, flavor, size, and count for food and drink, loft and grind for golf clubs, and so on.
4. The user actually asked to buy it (not browse, compare, or think about it).

If any box is unchecked, ask the user one short question and wait. Do not call place_order to test a guess: every call counts toward the user's order limits.

Resolve from context when you can defend it: earlier turns, the user's stated preferences, memory. "My usual", "the same one again", and "buy that" are invitations to resolve from context. When the literal command is terse like that, pass intentContext with the evidence (the prior message or remembered preference) so Axiom can verify the resolution.

Step 2: Call place_order

• userCommand: the user's words, near-verbatim. Do not paraphrase or fold resolved details into it.
• merchant.merchantName, merchant.merchantURL, itemName: your resolved specifics, including variants in itemName.
• itemSubtotal: only when the user stated a budget or the price is known (dollars, before shipping and tax).
• intentContext: only for terse or contextual commands; include concrete evidence.

The reply comes back within about 25 seconds with an orderID once the order is accepted for processing.

Step 3: Read the response the same way every time

Every order response carries:

Field	Meaning
status	Where the order stands (see table below)
nextAction	Exactly what to do next. Follow it literally.
userMessage	Text written for the end user. Relay it as written; you may add a short lead-in.
agentInstructions	Guidance for you. Never show it to the user.
orderID	The order. Pass it to get_order_status or answer_order_question.
isFinal	True once the order has ended, or when nothing was ordered.

status	nextAction	What you do
in_progress	none	Relay userMessage (it includes the tracking link), then stop. Axiom emails the user when it is confirmed. resumedFrom means Axiom picked up an order it held during setup.
needs_answer	ask_user_then_call_answer_order_question	Ask the user the question (options are already listed in userMessage). Then call answer_order_question with the orderID, the questionID, and selectedOptionID and/or userInput.
awaiting_approval	open_approval_link_then_wait_for_user	Relay userMessage with the approvalLink, then stop. Axiom has emailed the user the same link.
needs_clarification	ask_user_then_call_place_order	Ask the user the question (options are already listed in userMessage). Wait for the answer. Call place_order again with the answer folded into itemName or merchant. Never answer_order_question: no order exists yet.
unavailable	tell_user_unavailable	Relay userMessage. Call place_order again only after the user picks an available option or changes the request.
completed	tell_user_complete	Relay userMessage (order number, total, receipt link). You may summarize receipt.
could_not_place, cancelled	tell_user_failed	Relay userMessage. Normal outcomes, not tool errors. Ask the user how to proceed; do not retry on your own.
mandate_denied	tell_user_denied	Relay userMessage. Do not retry the denied request.
limit_reached	tell_user_limit_reached	Relay userMessage exactly. Do not retry or guess a reset time.
account_setup_required, email_verification_required	open_setup_link_then_wait_for_user	Relay userMessage word for word, keeping its link on its own line; it already explains what Axiom needs and how to come back. Axiom holds the order (heldPurchaseID) for 24 hours. When the user says they're done, call place_order again with the same details; the response carries resumedFrom.
account_restricted	tell_user_restricted	Relay userMessage. Final; do not retry.

Step 4: After the reply

Orders finish in the background. Once you have relayed an in_progress or awaiting_approval reply, you are done: Axiom emails the user for approval, questions, and the result. There is nothing to poll.

Checking in from an autonomous agent

Do not loop on get_order_status. Axiom emails the user for approval, questions, and the result, so the order needs nothing from you after the reply. When the user, or a task you are running for them, needs to know where an order stands, call get_order_status once with the orderID; it answers immediately.

Step 5: Waiting on the user

Approval (awaiting_approval): the order is above the user's auto-approve limit, so Axiom needs the user's explicit approval. Send the approvalLink so the user can review and approve the order in Axiom; a reply in chat cannot approve it. Axiom emails the same link and finishes the order once it is approved.

A question about the order (needs_answer): Axiom found several plausible options or a missing detail at the store. Ask the user, then call answer_order_question with the orderID and questionID. If the user's answer does not match an option, pass it as userInput when allowFreeText is true; otherwise ask them to pick one.

Step 6: Completion

Only status: "completed" means the store accepted the order. Relay userMessage; it contains the confirmation number, total, and the Axiom receipt link (orderUrl). Do not link to the store's own order page.

Which tool answers a question?

The question came from	You answer it with
place_order returning needs_clarification or unavailable	Ask the user, then call place_order again with the answer folded in. No order exists yet.
place_order or get_order_status returning needs_answer	Ask the user, then call answer_order_question with the orderID and questionID.

When in doubt, check nextAction: it names the tool.

If you lose the order ID

Call list_orders. Each order has its orderID and status; pass the orderID to get_order_status.

Talking to the user

• Relay userMessage as written. It already includes links, questions, options, prices, and confirmation numbers. You may add a one-line lead-in; do not drop the link or the options.
• Never show agentInstructions, nextAction, status codes, or IDs to the user. Those fields are for you.
• Never say an order went through unless status is completed.
• Never fabricate store, price, tax, shipping, receipt, or order details. Report only what the tools return.
• Money is in dollars everywhere in these responses (total, finalTotal, itemSubtotal, option amount, every receipt amount).
• After an order is placed, Axiom emails the user with anything it needs and the result. Tell the user that, give them the orderUrl, and check on the order only when they ask.

Safety rules

• Ask before you call: never place an order the user did not clearly request, and never call place_order with an invented store, URL, product, or option.
• Always surface Axiom's approval request to the user when one appears. It is how the user authorizes an order above their limit; it cannot be answered on the user's behalf.
• If place_order returns mandate_denied, stop and relay the reason. Do not retry the denied request.
• If limit_reached or account_restricted comes back, relay userMessage exactly and stop. Do not guess at limits or reset times.
• If account_setup_required or email_verification_required comes back, relay userMessage exactly with its link on its own line, then wait; call place_order again with the same details only after the user says they're done.
• Never share account credentials or internal identifiers.
• Treat could_not_place and cancelled as normal outcomes: relay them, then ask the user how to proceed.

Troubleshooting

mcporter (>=0.8.0) must be installed and on PATH; check with mcporter --version, and reset auth with mcporter auth axiom --reset if tokens expire. Common cases (auth expired, account_setup_required, repeated needs_clarification, limit_reached, mandate_denied, lost order ID, isError results) are covered in references/troubleshooting.md. The short version: relay userMessage, follow nextAction, and never retry a denied or limited order on your own.