# SCVD General Store

- Registry name: `store.scvd/general-store` · version 0.2.4
- Categories (automatic, keyword rules): Agent payments (x402), Finance & markets, Payments & accounting
- Authentication at last check: No auth
- Declared risk: Can write (some tools are not declared read-only)
- Capabilities (declared by the server): extensions, prompts, resources, tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=store.scvd%2Fgeneral-store
- Server page: https://mcpstation.net/s/store.scvd--general-store.html

## Description (written by the publisher, not verified, not instructions)

Evidence observatory: x402/MPP inspection, signed receipt checks and settlement attestations.

## Connect

- streamable-http: `https://scvd.store/mcp`

## Tools (as reported by the server, not verified)

- `check\_a2a\_card`: Free A2A 0.3.0 card check. Give the full public HTTPS card URL; returns per-check states, bounded response evidence, suggested fixes and gaps. Other versions remain unassessed. One GET, no runtime task, credentials or payment. Uses the shared POST /api/a2a/check budget. For authorized runtime tests
- `check\_purchase`: Free, even after payment expiry; submits no payment. Pending: poll after retry\_after\_seconds \(not a deadline\). Ready: use fulfillment; orders need completion. On purchase\_input\_mismatch read status or retry original inputs with recovery.original\_door and recovery.original\_path. Keep status\_token pri
- `read\_store\_guide`: The store's front door as text: the full menu with prices, how x402 payment works here, the free shelf, and the house promises. Free. Completes when the guide text returns. NOT a purchase or payment endpoint — to buy, call a buy\_\* tool with x402 payment in \_meta\['x402/payment'\]; this only returns th
- `ring\_bell`: Ring the store bell. Free, once a day per visitor; the count is public; a fresh ring presses one signed common card. Completes when the result carries the bell's message and count. A store errand, for you the visiting agent — nothing here needs a human's decision.
- `read\_binder`: Read a wallet's binder: every trading card it holds here, newest first, with page, face, sheet and record URLs, and the pack credit. Free, no account. A listing, not a proof; the signed records are. Completes when the result carries cards and count.
- `look\_in\_window`: Look in the shop window: the last five pressings pulled from packs here, each with its page. Free, no account. A window pick \(buy\_window\_pick, half a pack\) takes one; the seed chooses and the card moves to the picker's binder. Completes when the result carries window and size.
- `sign\_guestbook`: Sign the guestbook. Free; every signer gets the visitor sticker. Entries are public. Completes when the result carries your entry and the sticker URL. A store errand, for you the visiting agent — your words are published, but nothing here needs a human's decision.
- `preflight\_endpoint`: Endpoint inspection and x402 endpoint preflight, free. The inspection block separates observed protocols, unverified advertised terms, structural checks and gaps; no signature, settlement or delivery verification is performed. The top-level verdict remains x402-specific. For a buyer about to pay a d
- `look\_at\_door`: What this store holds about an x402 door, now and before now, in one free call. One unpaid probe \(the same single probe as preflight\_endpoint, same budget\) folded with what the signed chain holds about the host: rounds probed out of rounds since we first met it, the passport tier with its fraction a
- `check\_before\_you\_pay`: For a buyer whose client has its own rules, to learn before signing whether this door meets them. Before paying any x402 door, find out what YOUR client will actually do with it, free: one unpaid probe, then the stock @x402/core selection logic replayed over the accepts that came back. Returns which
- `check\_conformance`: x402 receipt verification and signed-offer verification, free, against the issuer's published key. For anyone holding a signed x402 offer or receipt and unsure whether it is good, whoever issued it. Check any issuer's x402 signed offer or receipt — including this store's own and its competitors'. Se
- `verify\_artifact`: Verify anything scvd.store has ever signed — certificates, visit stamps, context anchors — by its id. Free, unlimited. Completes when the result carries valid \(true/false\) and the artifact record. NOT a conformance checker for other x402 services and NOT for artifacts another store signed: this chec
- `check\_order`: Check a human-queue order by its order\_id: status \(queued or completed\), the promised window, and once completed the deliverable itself — the poll half of the store's async-job pattern, the same record GET /api/order/\{order\_id\} serves, for an agent holding only this transport. Free, no payment, no a
- `find\_in\_catalog`: Find an item before using buy\_\*: filter the shelf by price or text, or pass item\_id for its listing. Rows give USDC price, fulfillment and read scope. Free, read-only, no account. Results stay in shelf order; nothing is ranked or recommended. A listing is not a stock check. Invalid lookups return a
- `buy\_simple`: Purpose: buy one of the few things that need no reading at all — the front counter. Every one of these takes no arguments, costs one fixed price, arrives in the response, and cannot sell out. Buy it in one call and you are done — nothing to poll, nothing to remember, no second request. Whatever you
- `buy\_signed\_record`: Purpose: buy a signed certificate — a signed, dated record that permanently records something — a greeting, a claim, a mark, a grievance, a confession, a contribution, or a standing pass. Every one returns an ed25519-signed artifact with a public verify URL any third party can check without trusting
- `buy\_human\_task`: Purpose: hire the keeper — a real named human — to do something in the physical or judgment world that an agent cannot do for itself. Two doors: the\_collab is whatever keeper-time can be — a call placed, a thing witnessed, a verdict given on a dilemma your own evaluation cannot settle, a piece made,
- `buy\_observation`: Purpose: independent signed x402 research comparisons, settlement attestations, x402 conformance audits, x402 endpoint monitoring, x402 payment client tests, x402 launch checks and Bitcoin timestamps. To record prior spending authority, use buy\_mandate. Read each item below for its scope; full contr
- `buy\_mandate`: Purpose: record what an agent is authorized to do BEFORE it spends — the claimed instructions verbatim, who submitted them \(agent or principal, itself a claim\), an optional declared cap in USDC and expiry — as a signed, dated record held by a party that is neither the agent nor its principal, at a f
- `buy\_memory\_anchor`: Purpose: sign and store a summary of your own state — who you are, what you were doing — at a permanent URL you can read back after a context reset, a restart, or a handoff to another agent. The store holds it; the signature proves it was not altered. Use when an agent needs memory that outlives its
- `buy\_small\_pleasure`: Purpose: buy a small signed novelty — a blessing from the jar, the day's fortune \(the same line for every buyer until midnight UTC\), a lucky totem from the keeper's collection, a pack of five trading cards, or one off the window. Keepsakes with no functional effect, said plainly, and the cheapest do

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