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MCP live MCP 2026-07-28 streamable-http ext: ui

SCVD General Store

store.scvd/general-store

Evidence observatory for agentic commerce: x402 preflight, receipt checks, settlement attestations.

Watch this dependency

Get before/after evidence when observed tools, schemas, authentication access, availability or the endpoint changes.

Inspect evidence and set up a watch Share public evidence report
Uptime
100.0%
5 direct probes · 30d
Response
208ms
last probe
Tools
21
callable
Resources
9
readable
Prompts
0
available
Primary URL
https://scvd.store/mcp
Score: 100/100
Handshake verified by our own probe.
why this score
pass Answers the MCP handshake 50/50
The handshake and the list calls succeeded on the primary URL.
pass Lists tools, resources or prompts 30/30
21 tools, 9 resources, 0 prompts returned.
pass 3 or more catalogue items 10/10
30 items in total; 3 or more earns these points.
pass Describes itself 10/10
99 characters; more than 30 earns these points.

Tools · 21

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 tas…

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…

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 e…

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…

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. C…

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 mov…

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…

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 …

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 abou…

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 prob…

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. C…

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…

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 recor…

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 shel…

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 i…

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 re…

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 plac…

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.…

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 ex…

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…

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 …

Resources · 9

store_guide

What this store is, what it sells, what it refuses to claim, and how to transact — the full prose briefing an agent reads before deciding whether to spend anything here. The same bytes as GET /llms.tx…

scvd://guide
transaction_manual

The step-by-step x402 purchase flow: how a 402 arrives, which fields to sign, how to retry with payment, and what comes back. For an agent executing rather than evaluating. The same bytes as GET /agen…

scvd://manual
catalog

Every item on the shelf: id, price in USDC, what it delivers, whether it is instant or human-fulfilled, and the exact query parameters it requires. The same catalog as GET /menu.json.

scvd://catalog
preflight_criteria

The named battery the paid Once-Over and the weekly census cite against an x402 endpoint, version preflight-v3 — each check, what it means, and what a failure does and does not prove. The free door st…

scvd://criteria
which_instrument

A routing table from a caller's situation to the thing that answers it: about to pay an unknown door, handed a signed offer you cannot place, needing a settlement corroborated, needing to catch a door…

scvd://when
fresh_set

The public x402 endpoints that answered a spec-conformant payment challenge in the latest weekly census, each with the rails it takes, the cheapest USDC ask its own 402 offered, and a link to its sign…

scvd://fresh-set
payment_breakdown

Free aggregate purchase counts from the same books as /stats and /rails. House purchases excluded; payment identities are not published. Counts are separate from revenue, delivery and endpoint observa…

scvd://payments
preflight-card

Renders a preflight reading for the human behind the agent: verdict with its reached_level ceiling, the evidence ladder with unclimbed rungs at full weight, what a single probe cannot tell you, and th…

ui://scvd-general-store/preflight-card.html
verify-card

Renders a signature check on an artifact this store issued: valid or not, the artifact kind, and how to reproduce the check offline without trusting us. Display only; nothing on it can act.

ui://scvd-general-store/verify-card.html

How to use

Add to your Claude Desktop / Cursor / Cline MCP config:

{
  "mcpServers": {
    "scvd_general_store": {
      "url": "https://scvd.store/mcp",
      "transport": "streamable-http"
    }
  }
}