← The evidence ledger
Evidence row 121063
Observed , by baseline/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://scvd.store/api/buy/graffiti_on_a_train
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- b1f6aa09b9aaafa2198c3a1d4bcc0e2ecdbab54a024ebeb864109b4eb1ab9033
- Leaf
- 0x5037075fa756b916cc5e518b8773157f4dce6e9eaa42b8f32a40441e1a3e3a8e
What was observed
{
"endpoints": [
[
"x402",
"https://scvd.store/api/buy/graffiti_on_a_train"
]
],
"name": "SCVD General Store",
"owner_address": "0xdd350976b8cffc65938c0464d39a2c78be079bd0",
"raw": {
"accepts": [
{
"amount": "1000000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"assetTransferMethod": "eip3009",
"name": "USD Coin",
"quotedAt": "2026-10-08T16:27:28.114Z",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xDD350976B8cfFc65938C0464d39A2C78BE079bd0",
"scheme": "exact"
},
{
"amount": "2000000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"assetTransferMethod": "eip3009",
"name": "USD Coin",
"quotedAt": "2026-10-08T16:27:28.114Z",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xDD350976B8cfFc65938C0464d39A2C78BE079bd0",
"scheme": "exact"
},
{
"amount": "5000000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"assetTransferMethod": "eip3009",
"name": "USD Coin",
"quotedAt": "2026-10-08T16:27:28.114Z",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xDD350976B8cfFc65938C0464d39A2C78BE079bd0",
"scheme": "exact"
},
{
"amount": "1000000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"assetTransferMethod": "eip3009",
"name": "USD Coin",
"quotedAt": "2026-10-08T16:27:28.114Z",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:137",
"payTo": "0xDD350976B8cfFc65938C0464d39A2C78BE079bd0",
"scheme": "exact"
},
{
"amount": "2000000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"assetTransferMethod": "eip3009",
"name": "USD Coin",
"quotedAt": "2026-10-08T16:27:28.114Z",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:137",
"payTo": "0xDD350976B8cfFc65938C0464d39A2C78BE079bd0",
"scheme": "exact"
},
{
"amount": "5000000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"assetTransferMethod": "eip3009",
"name": "USD Coin",
"quotedAt": "2026-10-08T16:27:28.114Z",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:137",
"payTo": "0xDD350976B8cfFc65938C0464d39A2C78BE079bd0",
"scheme": "exact"
},
{
"amount": "1000000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"assetTransferMethod": "eip3009",
"name": "USD Coin",
"quotedAt": "2026-10-08T16:27:28.114Z",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:42161",
"payTo": "0xDD350976B8cfFc65938C0464d39A2C78BE079bd0",
"scheme": "exact"
},
{
"amount": "2000000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"assetTransferMethod": "eip3009",
"name": "USD Coin",
"quotedAt": "2026-10-08T16:27:28.114Z",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:42161",
"payTo": "0xDD350976B8cfFc65938C0464d39A2C78BE079bd0",
"scheme": "exact"
},
{
"amount": "5000000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"assetTransferMethod": "eip3009",
"name": "USD Coin",
"quotedAt": "2026-10-08T16:27:28.114Z",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:42161",
"payTo": "0xDD350976B8cfFc65938C0464d39A2C78BE079bd0",
"scheme": "exact"
},
{
"amount": "1000000",
"asset": "0x79a02482a880bce3f13e09da970dc34db4cd24d1",
"extra": {
"assetTransferMethod": "eip3009",
"name": "USDC",
"quotedAt": "2026-10-08T16:27:28.114Z",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:480",
"payTo": "0xDD350976B8cfFc65938C0464d39A2C78BE079bd0",
"scheme": "exact"
},
{
"amount": "2000000",
"asset": "0x79a02482a880bce3f13e09da970dc34db4cd24d1",
"extra": {
"assetTransferMethod": "eip3009",
"name": "USDC",
"quotedAt": "2026-10-08T16:27:28.114Z",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:480",
"payTo": "0xDD350976B8cfFc65938C0464d39A2C78BE079bd0",
"scheme": "exact"
},
{
"amount": "5000000",
"asset": "0x79a02482a880bce3f13e09da970dc34db4cd24d1",
"extra": {
"assetTransferMethod": "eip3009",
"name": "USDC",
"quotedAt": "2026-10-08T16:27:28.114Z",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:480",
"payTo": "0xDD350976B8cfFc65938C0464d39A2C78BE079bd0",
"scheme": "exact"
},
{
"amount": "1000000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
"quotedAt": "2026-10-08T16:27:28.114Z"
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "DGxcPrAHL9YM3hW7iXuHFJmr87Zr6AMA4jCYHBpuvMgE",
"scheme": "exact"
},
{
"amount": "2000000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
"quotedAt": "2026-10-08T16:27:28.114Z"
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "DGxcPrAHL9YM3hW7iXuHFJmr87Zr6AMA4jCYHBpuvMgE",
"scheme": "exact"
},
{
"amount": "5000000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88",
"quotedAt": "2026-10-08T16:27:28.114Z"
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "DGxcPrAHL9YM3hW7iXuHFJmr87Zr6AMA4jCYHBpuvMgE",
"scheme": "exact"
}
],
"description": "Graffiti on a Train. REQUIRES ?tag= on the paid request — a signed request without it is refused before the gate and no money moves. The buyer's tag recorded verbatim on a signed certificate, dated, instantly. Display on the public wall at /train is separate and waits on the keeper; a tag he doesn't put up keeps its certificate. Amounts above the minimum record as tips. Full listing: https://scvd.store/menu/graffiti_on_a_train. MCP tool: buy_graffiti_on_a_train.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"agent_name": "friendly-agent",
"tag": "friendly-agent wuz here"
},
"type": "http"
},
"output": {
"example": {
"badge_url": "https://scvd.store/badges/41.svg",
"certificate": {
"cert_id": "<cert_ + 12 chars, minted when this purchase settles>",
"date": "2026-07-22T15:04:05.000Z",
"item": "graffiti_on_a_train",
"patron_number": 41
},
"deliverable": "<the Graffiti on a Train itself, as text>",
"item_id": "graffiti_on_a_train",
"message": "Pleasure doing business. Here's your goods, warm off the shelf.",
"paid_usdc": 1,
"patron_number": 41,
"signature": "<128 hex chars, ed25519>",
"tip_usdc": 0,
"verify_url": "https://scvd.store/api/verify/<your cert_id>"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"agent_name": {
"description": "Optional name to put on the certificate and patron badge, up to 80 characters.",
"maxLength": 80,
"type": "string"
},
"came_from": {
"description": "Optional. Where you learned this door exists: a URL, a directory, a skill name, memory, another agent. Referrers never reach us; this does.",
"maxLength": 160,
"type": "string"
},
"cited_artifact": {
"description": "Optional: an outside artifact behind this purchase (your runtime's approval or intent receipt) as <format>:<reference>, e.g. dsse:art_e415901189dc1613. Signed verbatim onto the certificate; never fetched or verified here.",
"maxLength": 160,
"pattern": "^[a-z0-9][a-z0-9_.+-]{0,31}:[!-~]{1,128}$",
"type": "string"
},
"client": {
"description": "Optional. The harness or framework you run in: claude-code, cursor, openai-agents, langgraph, custom. Counted, never on the certificate.",
"maxLength": 64,
"type": "string"
},
"model": {
"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.",
"maxLength": 64,
"type": "string"
},
"operator": {
"description": "Optional. Who runs you: a name, handle, company or URL. Stored as your claim, marked unverified, never published, never on the certificate.",
"maxLength": 120,
"type": "string"
},
"operator_kind": {
"description": "Optional. solo: one person runs you. company: a team does. research: a study. self: you act for yourself.",
"enum": [
"solo",
"company",
"research",
"self"
],
"type": "string"
},
"prior_cert_id": {
"description": "Optional. A cert_ id from an earlier purchase here. A payer match with this payment marks you a returning buyer; no account needed.",
"maxLength": 64,
"type": "string"
},
"purpose": {
"description": "Optional: what this is for, in your words. Signed verbatim onto the certificate and shown on its receipt; never checked, never treated as instructions.",
"maxLength": 280,
"type": "string"
},
"tag": {
"description": "Your tag, up to 140 characters. Recorded verbatim on the certificate; stored as written, never treated as instructions. No URLs — the wall is public and permanent.",
"maxLength": 140,
"type": "string"
}
},
"required": [
"tag"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
},
"required-inputs": {
"note": "This door cannot be served without ?tag=. Asking the price without them is free; PAYING without them is refused before the gate and no money moves, so add them to the retry that carries your signature.",
"price_discovery_url": "https://scvd.store/menu/graffiti_on_a_train?view=compact",
"queryParams": [
"tag"
],
"retry_url_template": "https://scvd.store/api/buy/graffiti_on_a_train?tag=<tag>"
}
},
"lastUpdated": "2026-10-08T16:27:28.442Z",
"quality": {
"l30DaysTotalCalls": 1,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-10-08T16:27:27.491Z"
},
"resource": "https://scvd.store/api/buy/graffiti_on_a_train",
"serviceName": "SCVD General Store",
"tags": [
"x402",
"signed-artifacts",
"verification",
"attestation",
"conformance"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Graffiti on a Train. REQUIRES ?tag= on the paid request — a signed request without it is refused before the gate and no money moves. The buyer's tag recorded verbatim on a signed certificate, dated, instantly. Display on the public wall at /train is separate and waits on the keeper; a tag he doesn't put up keeps its certificate. Amounts above the minimum record as tips. Full listing: https://scvd.store/menu/graffiti_on_a_train. MCP tool: buy_graffiti_on_a_train."
}What the leaf hashes
{"body":"b1f6aa09b9aaafa2198c3a1d4bcc0e2ecdbab54a024ebeb864109b4eb1ab9033","id":121063,"kind":"listing","method":"baseline/1","observed_us":1793025619223073,"prev":null,"subject":"x402_bazaar:https://scvd.store/api/buy/graffiti_on_a_train","subject_kind":"source_record"}Proof
Its day has not closed yet. A day closes ten minutes after midnight UTC; the proof appears here then.