SCVD General Store

Research Comparison. REQUIRES ?urls= on the paid request — a signed request without it is refused before the gate and no money moves. One signed comparison: live atomic payment terms, dated host history and gaps, same-endpoint network changes, shared receivers and limits. No research quality or ownership verdict. Full listing: https://scvd.store/menu/research_comparison. MCP tool: buy_research_comparison.

SearchLiveeip155:8453Exactvia cdp

https://scvd.store/api/buy/research_comparison

x402Signed-artifactsVerificationAttestationConformance

Calls · 30d

5↑ 25%

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far.

$1,520.97

Verified settled volume

571 settlements proven x402 by their on-chain EIP-3009 marker.

$0.010

Listed price

As published in the catalog. Always read the live 402 before paying.

4

Calls · 30d

Upstream's own call count for this endpoint, not ours.

3

Unique payers · 30d

Last called 2026-10-19 10:30Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0xDD350976B8cfFc65938C0464d39A2C78BE079bd0

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

SCVD General StoreERC-8004

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.01USDC≈ $0.01 USD

on Base · exact scheme

Pay 0.01 USDC on Base to 0xDD35…79bd0. The signed payment is good for 5 minutes.

Paid to: 0xDD35…79bd0
USD Coin contract: 0x8335…02913
Payment window: 5 minutes
As published: 10000 smallest units

10000units

on Polygon · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: 0xDD35…79bd0
Token contract: 0x3c49…c3359
Payment window: 5 minutes

10000units

on Arbitrum · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: 0xDD35…79bd0
Token contract: 0xaf88…e5831
Payment window: 5 minutes

10000units

on eip155:480 · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: 0xDD35…79bd0
Token contract: 0x79a0…d24d1
Payment window: 5 minutes

10000units

on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: DGxcPr…uvMgE
Token contract: EPjFWd…TDt1v
Payment window: 5 minutes

10000units

on eip155:5042 · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to: 0xDD35…79bd0
Token contract: 0x3600…00000
Payment window: 168 hours

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2",
      "quotedAt": "2026-10-19T10:30:59.614Z",
      "assetTransferMethod": "eip3009"
    },
    "payTo": "0xDD350976B8cfFc65938C0464d39A2C78BE079bd0",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "extra": {
      "name": "USD Coin",
      "version": "2",
      "quotedAt": "2026-10-19T10:30:59.614Z",
      "assetTransferMethod": "eip3009"
    },
    "payTo": "0xDD350976B8cfFc65938C0464d39A2C78BE079bd0",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:137",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "extra": {
      "name": "USD Coin",
      "version": "2",
      "quotedAt": "2026-10-19T10:30:59.614Z",
      "assetTransferMethod": "eip3009"
    },
    "payTo": "0xDD350976B8cfFc65938C0464d39A2C78BE079bd0",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:42161",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x79a02482a880bce3f13e09da970dc34db4cd24d1",
    "extra": {
      "name": "USDC",
      "version": "2",
      "quotedAt": "2026-10-19T10:30:59.614Z",
      "assetTransferMethod": "eip3009"
    },
    "payTo": "0xDD350976B8cfFc65938C0464d39A2C78BE079bd0",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:480",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
      "quotedAt": "2026-10-19T10:30:59.614Z"
    },
    "payTo": "DGxcPrAHL9YM3hW7iXuHFJmr87Zr6AMA4jCYHBpuvMgE",
    "amount": "10000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "0x3600000000000000000000000000000000000000",
    "extra": {
      "name": "GatewayWalletBatched",
      "version": "1",
      "quotedAt": "2026-10-19T10:30:59.614Z",
      "verifyingContract": "0x77777777dcc4d5a8b6e418fd04d8997ef11000ee",
      "minValiditySeconds": 604800
    },
    "payTo": "0xDD350976B8cfFc65938C0464d39A2C78BE079bd0",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:5042",
    "maxTimeoutSeconds": 604900
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "urls": "[\"https://research-a.example/quote\",\"https://research-b.example/quote\"]",
          "agent_name": "friendly-agent"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "item_id": "research_comparison",
          "message": "Pleasure doing business. Here's your goods, warm off the shelf.",
          "tip_usdc": 0,
          "badge_url": "https://scvd.store/badges/41.svg",
          "paid_usdc": 0.01,
          "signature": "<128 hex chars, ed25519>",
          "verify_url": "https://scvd.store/api/verify/<your cert_id>",
          "certificate": {
            "date": "2026-07-22T15:04:05.000Z",
            "item": "research_comparison",
            "cert_id": "<cert_ + 12 chars, minted when this purchase settles>",
            "patron_number": 41
          },
          "deliverable": "<the Research Comparison itself, as text>",
          "patron_number": 41
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "required": [
                "urls"
              ],
              "properties": {
                "urls": {
                  "type": "string",
                  "maxLength": 4114,
                  "description": "JSON-encoded array of 2–4 distinct public HTTPS URLs (1024 characters each), for unauthenticated GET payment challenges. No credentials, fragments, secrets or private prompts; no research purchased."
                },
                "model": {
                  "type": "string",
                  "maxLength": 64,
                  "description": "Optional. The model running you, as you would name it: claude-opus-5, gpt-5.6, a local model. Counted, never printed on the certificate."
                },
                "client": {
                  "type": "string",
                  "maxLength": 64,
                  "description": "Optional. The harness or framework you run in: claude-code, cursor, openai-agents, langgraph, custom. Counted, never on the certificate."
                },
                "purpose": {
                  "type": "string",
                  "maxLength": 280,
                  "description": "Optional purpose: signed verbatim on certificate, shown on receipt; never checked or treated as instructions."
                },
                "operator": {
                  "type": "string",
                  "maxLength": 120,
                  "description": "Optional. Who runs you: a name, handle, company or URL. Stored as your claim, marked unverified, never published, never on the certificate."
                },
                "came_from": {
                  "type": "string",
                  "maxLength": 160,
                  "description": "Optional. Where you learned this door exists: a URL, a directory, a skill name, memory, another agent. Referrers never reach us; this does."
                },
                "agent_name": {
                  "type": "string",
                  "maxLength": 80,
                  "description": "Optional certificate and patron-badge name; up to 80 characters."
                },
                "operator_kind": {
                  "enum": [
                    "solo",
                    "company",
                    "research",
                    "self"
                  ],
                  "type": "string",
                  "description": "Optional. solo: one person runs you. company: a team does. research: a study. self: you act for yourself."
                },
                "prior_cert_id": {
                  "type": "string",
                  "maxLength": 64,
                  "description": "Optional. A cert_ id from an earlier purchase here. A payer match with this payment marks you a returning buyer; no account needed."
                },
                "cited_artifact": {
                  "type": "string",
                  "pattern": "^[a-z0-9][a-z0-9_.+-]{0,31}:[!-~]{1,128}$",
                  "maxLength": 160,
                  "description": "Optional: an outside artifact behind this purchase (your runtime's approval or intent receipt) as <format>:<reference>, e.g. dsse:art_e415901189dc1613. Signed verbatim onto the certificate; never fetched or verified here."
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  },
  "required-inputs": {
    "note": "This door cannot be served without ?urls=. Asking the price without them is free; PAYING without them is refused before the gate and no money moves, so supply them on an unsigned request first, then sign the resulting quote and retry that identical request.",
    "queryParams": [
      "urls"
    ],
    "retry_url_template": "https://scvd.store/api/buy/research_comparison?urls=<urls>",
    "price_discovery_url": "https://scvd.store/menu/research_comparison?view=compact"
  }
}

Provenance

Seen in the source catalog: 2026-10-19 10:30Z
Last indexed by Roundhouse: 2026-10-26 17:10Z
Last enriched (probe, favicon, geo): 2026-09-24 20:45Z
x402 version: 2
Max timeout: 300s
Liveness probe: HTTP 402

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Show the prompt

Using Roundhouse, look up the x402 service SCVD General Store and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=SCVD%20General%20Store'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://scvd.store/api/buy/research_comparison, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.