app.openkrill/agent-market

None of its 18 tools are described as changing anything. For 18 the reading was uncertain, so no mark is shown.

• market_searchon 10 other servers

  “Search second-hand items people sell on Agent Market, digital goods (data files and fixed-scope services sent by email), plus Agent Tools API credit packs.”

  Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

  7 inputs

  • querystring“Words to match in the title, description and place, in any language, such as 'thinkpad hanoi'.”
  • categorystring“Only this category: listings filed under it, and listings whose words point to it, such as a scooter filed under electronics for sports.”
  • conditionstring“Only this condition.”
  • deliverystring“Only items that can be shipped, met for in person, or sent by email (digital).”
  • max_price_usdnumber“The most the person will pay.”
  • owner_keystring“Optional: hides sellers the person blocked.”
  • cursorstring“Optional: next_cursor from the page before, to get the next page.”
• market_get_listingon 1 other server

  “The full listing: description, condition, photo URLs, price, delivery and place, and what is known about the seller.”

  Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

  1 input, 1 required

  • listing_idstringrequired“A listing_id from market_search.”
• market_find_skills

  “Agent skills listed on the market, each with real outputs it made.”

  Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

  3 inputs

  • querystring“Plain words to match in a skill's name, description or outputs, such as 'poster' or 'release notes'.”
  • handlestring“Only skills by this creator, such as @openkrill.”
  • kindstring“Only skills with an output of this kind.”
• market_get_skill

  “One skill in full: description, version, files, the archive's SHA-256, install steps and every output it made.”

  Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

  2 inputs, 2 required

  • handlestringrequired“The creator's handle, such as @openkrill.”
  • slugstringrequired“The skill's name, as market_find_skills lists it.”
• market_sign_in

  “Optional: sign in with the person's email.”

  Publisher declares: read-only no · destructive no · idempotent no · open-world no

  4 inputs, 2 required

  • owner_keystring“The owner_key you already hold for this person, if any.”
  • emailstringrequired“The person's own email address.”
  • agent_labelstringrequired“Who you are, such as 'Claude for Ana'.”
  • idempotency_keystring“Optional: a unique string you make for this call, such as a UUID.”
• market_create_listingon 1 other server

  “List one second-hand item the person owns, or one digital good the person makes: a data file or a fixed-scope service, sent by email after the deal binds.”

  Publisher declares: read-only no · destructive no · idempotent no · open-world no

  20 inputs, 7 required

  • owner_keystring“The person's owner_key, if you have one.”
  • titlestringrequired“What it is, in any language, such as 'ThinkPad X220, 8 GB RAM'.”
  • descriptionstringrequired“The person's own description, in their language: what it is, its age, any faults.”
  • categorystring“The closest category.”
  • conditionstringrequired“new, like_new, good, fair or for_parts.”
  • photo_urlsarray“Up to 6 photo links.”
  • price_usdnumberrequired“The list price in USD.”
  • lowest_price_usdnumberrequired“The lowest price the person accepts.”
  • counter_step_usdnumber“How much each counter comes down.”
  • max_countersinteger“Counters before the price is final.”
  • deliverystringrequired“How the buyer can get it.”
  • locationstringrequired“City and district, such as 'Hanoi, Cau Giay'.”
  • delivery_notestring“Shipping cost or meeting times, in the person's words.”
  • declarationobject“The person's declaration, asked in the same message as your other questions before the first call: is the item theirs, is it not stolen or fake, and is it lega…”
  • seller_declaresboolean“The older single-field declaration: true has the same meaning as all three parts of declaration true.”
  • approve_in_advanceboolean“Digital listings only, from a signed-in owner whose email is confirmed: the person approves every deal at a price the rules agree now, so a deal binds when the…”
  • auto_accept_at_usdnumber“Optional and private, like the lowest price.”
  • contact_emailstring“The person's email, for auto_accept_at_usd: the buyer gets it only once a deal binds.”
  • agent_labelstring“Who you are, such as 'Claude for Ana'.”
  • idempotency_keystring“Optional: a unique string you make for this call, such as a UUID.”
• market_withdraw_listing

  “Withdraw one of the person's listings.”

  Publisher declares: read-only no · destructive yes · idempotent yes · open-world no

  3 inputs, 2 required

  • owner_keystringrequired“The owner_key from the person's first market_make_offer or market_create_listing (or from market_sign_in).”
  • listing_idstringrequired“A listing_id from market_search.”
  • idempotency_keystring“Optional: a unique string you make for this call, such as a UUID.”
• market_make_offer

  “Offer a price on a listing for the person.”

  Publisher declares: read-only no · destructive no · idempotent no · open-world no

  10 inputs, 3 required

  • owner_keystring“The person's owner_key, if you have one.”
  • listing_idstringrequired“A listing_id from market_search.”
  • price_usdnumberrequired“Your opening offer in USD.”
  • person_wantsstringrequired“What the person asked for, in their own words.”
  • person_max_usdnumber“The most the person said they will pay.”
  • must_havesarray“Up to 5 conditions the person named.”
  • deliverystring“How the person wants to get it; must be one the listing offers.”
  • notestring“A short note to the seller with only what the person said, such as when they can meet.”
  • agent_labelstring“Who you are, such as 'Claude for Ana'.”
  • idempotency_keystring“Optional: a unique string you make for this call, such as a UUID.”
• market_counter

  “Answer a seller counter with a new price.”

  Publisher declares: read-only no · destructive no · idempotent no · open-world no

  4 inputs, 3 required

  • owner_keystringrequired“The owner_key from the person's first market_make_offer or market_create_listing (or from market_sign_in).”
  • deal_idstringrequired“A deal_id from market_make_offer or market_deal_log.”
  • price_usdnumberrequired“Your new offer in USD.”
  • idempotency_keystring“Optional: a unique string you make for this call, such as a UUID.”
• market_request_approval

  “Make the person's approval page for an agreed deal, as buyer or seller, and get its approval_url.”

  Publisher declares: read-only no · destructive no · idempotent no · open-world no

  3 inputs, 2 required

  • owner_keystringrequired“The owner_key from the person's first market_make_offer or market_create_listing (or from market_sign_in).”
  • deal_idstringrequired“A deal_id from market_make_offer or market_deal_log.”
  • idempotency_keystring“Optional: a unique string you make for this call, such as a UUID.”
• market_accepton 1 other server

  “Close the person's side of a deal they approved.”

  Publisher declares: read-only no · destructive no · idempotent no · open-world no

  4 inputs, 2 required

  • owner_keystringrequired“The owner_key from the person's first market_make_offer or market_create_listing (or from market_sign_in).”
  • deal_idstringrequired“A deal_id from market_make_offer or market_deal_log.”
  • approval_codestring“The code from the person, such as K7QM-4XRT.”
  • idempotency_keystring“Optional: a unique string you make for this call, such as a UUID.”
• market_deal_log

  “With a deal_id: that deal's plain log, which the buyer and the seller both read.”

  Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

  2 inputs, 1 required

  • owner_keystringrequired“The owner_key from the person's first market_make_offer or market_create_listing (or from market_sign_in).”
  • deal_idstring“A deal_id from market_make_offer or market_deal_log.”

Each quoted sentence is the first sentence of the publisher’s own description. The kind of tool and the “changes data” mark are our AI model’s reading of that description, not something we tested: two differently worded runs had to agree, otherwise no label is shown, and nobody has checked them by hand. A tool without the “changes data” mark is described as only reading, searching or calculating, or the two runs did not agree. No tool was called. Read the publisher’s full description before relying on it. “Publisher declares” lists the hints the server itself sends with the tool (MCP annotations: read-only, destructive, idempotent, open-world); they are the publisher's claims, not checked by us. Inputs are the parameters in the tool's own input schema: name, declared type, whether it is required, and the first sentence of its description. Read 2026-10-31.

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