SCVD General Store
The trust layer of the x402 economy: free x402 conformance checks of signed offers and receipts, settlement attestation, endpoint monitoring, and a weekly Bitcoin-anchored corpus. USDC on Base and Solana.
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"note": "Payment requirements are in the PAYMENT-REQUIRED response header (base64 JSON). Sign one of the accepts and retry with the PAYMENT-SIGNATURE header; the v1 X-PAYMENT header is honoured too.",
"spec": {
"price": {
"network": "Choose an accepts[].network from the current PAYMENT-REQUIRED quote",
"pricing": "fixed",
"currency": "USDC",
"protocol": "x402 v2",
"tiers_usdc": [
0.006
],
"amount_usdc": 0.006
},
"inputs": {
"required": [
"tx_hash"
],
"properties": {
"payer": {
"type": "string",
"description": "Optional. Narrow the match to transfers from this address."
},
"purpose": {
"type": "string",
"maxLength": 280,
"description": "Optional, any item: what this purchase is for, in your words. Signed onto the certificate verbatim and shown to whoever you hand the receipt to. Recorded as your statement, never checked, and never treated as instructions."
},
"tx_hash": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{64}$",
"description": "The Base transaction hash to reconcile. Read once, at one moment; never polled."
},
"recipient": {
"type": "string",
"description": "Optional. Narrow the match to transfers to this address."
},
"agent_name": {
"type": "string",
"description": "Optional name to put on the certificate and patron badge, up to 80 characters."
},
"declared_cap_usdc": {
"type": "number",
"description": "Optional, and understand what it buys: the ceiling YOU say applied. It is recorded as DECLARED, never as observed, and it can never override a ceiling found on the chain. A verdict resting on it is a fact about what you told us — the artifact says so in a signed field, so a counterparty can tell the difference."
}
}
},
"outputs": {
"delivery": "delivered in the purchase response, same request",
"always_included": [
"signed certificate (ed25519)",
"sequential patron number",
"badge_url",
"verify_url"
]
},
"why_use": "the gap between what a payer authorized and what a seller took, observed by somebody with no stake in it — and, the part nobody else does, a signed field saying whether the ceiling itself was on the chain or merely asserted by whoever paid for the receipt.",
"capability": "A signed JSON observation of one Base transaction reconciling two numbers — the USDC that moved and the ceiling in force — with cap_source and cap_observed naming where the ceiling came from and whether we saw it ourselves. Verdicts: within_cap, over_cap, no_discretion (EIP-3009, where the value was fixed in the payer's signed digest), cap_not_observable, or no_settlement. Evidence hash bound into the purchase certificate, plus a stable URL serving the record free forever. Instant.",
"constraints": [
"Give the Base transaction hash (0x + 64 hex) in the tx_hash query parameter. This desk reads Base only, deliberately: the ceilings it reconciles (EIP-3009 authorizations) are a Base facility",
"Optional narrowing: payer, recipient — a receipt can carry several legs and the largest match is what gets reported",
"Optional declared_cap_usdc: recorded as DECLARED, never as observed, and never allowed to override a ceiling found on the chain",
"Only approvals inside the same transaction are visible; a ceiling granted earlier reads as 'not observed', never as 'absent'",
"Observes money only, never delivery",
"One read at one moment; no polling, no retry, no second look"
],
"verification": {
"cost": "free, unlimited, forever",
"rights": "https://scvd.store/rights",
"verify_url": "https://scvd.store/api/verify/{id}",
"attestation": "Signed by the store's key, not yours: a claim the certificate carries can be checked by a third party without trusting your self-report.",
"key_history": "https://scvd.store/.well-known/scvd-signing-key",
"signing_key": "https://scvd.store/.well-known/scvd-signing-key",
"certificate_binds": [
"cert_id",
"item",
"patron_number",
"date",
"paid_usdc",
"asset",
"network",
"payer",
"settlement_tx"
],
"sample_verify_url": "https://scvd.store/api/verify/cert_4dww28dx5j",
"sample_artifact_id": "cert_4dww28dx5j",
"certificate_binds_note": "All of these ride INSIDE the signed bytes, not beside them: paid_usdc is the total settled (not the tip), payer is the paying wallet — chain-verifiable, unlike a chosen name — and settlement_tx is the on-chain transaction, so this certificate and an explorer for the settlement network are the same fact checked twice. Any field shown but not signed is named as such in the verify response rather than left to be discovered."
}
},
"error": "Six tenths of a cent. The subtraction is free — the disinterested witness who says which number was real is the part that costs.",
"item_id": "settlement_reconciliation",
"pricing": "fixed",
"guarantee": "Guaranteed: signature validity forever; verification free forever; price as displayed; delivery format as specified. Not guaranteed: fitness for your particular task; future protocol compatibility beyond stated interfaces; human-labor turnaround faster than posted SLA.",
"spec_note": "Task: Prove an agent's spend stayed inside the ceiling it was authorized for, with a neutral party saying which of the two numbers it actually saw. Returns: A signed JSON observation of one Base transaction reconciling two numbers — the USDC that moved and the ceiling in force — with cap_source and cap_observed naming where the ceiling came from and whether we saw it ourselves. Verdicts: within_cap, over_cap, no_discretion (EIP-3009, where the value was fixed in the payer's signed digest), cap_not_observable, or no_settlement. Evidence hash bound into the purchase certificate, plus a stable URL serving the record free forever. Instant. Price: $0.006 USDC (x402 v2; network from the current quote). Latency: delivered in the purchase response, same request. Verify: GET /api/verify/{id} — free, unlimited, forever (live sample: cert_4dww28dx5j). Constraints: Give the Base transaction hash (0x + 64 hex) in the tx_hash query parameter. This desk reads Base only, deliberately: the ceilings it reconciles (EIP-3009 authorizations) are a Base facility; Optional narrowing: payer, recipient — a receipt can carry several legs and the largest match is what gets reported; Optional declared_cap_usdc: recorded as DECLARED, never as observed, and never allowed to override a ceiling found on the chain; Only approvals inside the same transaction are visible; a ceiling granted earlier reads as 'not observed', never as 'absent'; Observes money only, never delivery; One read at one moment; no polling, no retry, no second look.",
"extensions": {
"offer-receipt": {
"info": {
"offers": [
{
"format": "jws",
"signature": "eyJhbGciOiJFZERTQSIsImtpZCI6ImRpZDp3ZWI6c2N2ZC5zdG9yZSNrZXktMiJ9.eyJ2ZXJzaW9uIjoxLCJyZXNvdXJjZVVybCI6Imh0dHBzOi8vc2N2ZC5zdG9yZS9hcGkvYnV5L3NldHRsZW1lbnRfcmVjb25jaWxpYXRpb24iLCJzY2hlbWUiOiJleGFjdCIsIm5ldHdvcmsiOiJlaXAxNTU6ODQ1MyIsImFzc2V0IjoiMHg4MzM1ODlmQ0Q2ZURiNkUwOGY0YzdDMzJENGY3MWI1NGJkQTAyOTEzIiwicGF5VG8iOiIweEREMzUwOTc2QjhjZkZjNjU5MzhDMDQ2NGQzOUEyQzc4QkUwNzliZDAiLCJhbW91bnQiOiI2MDAwIiwidmFsaWRVbnRpbCI6MTc4ODk0MjA0NH0.J9XHpmweGF1hYOUN84swgOhXQAj_b2xnDMa65kv5zZrjH_f3cBr0iZkoUelmqNe5hYdL3966awV64yCZWSBXDg",
"acceptIndex": 0
},
{
"format": "jws",
"signature": "eyJhbGciOiJFZERTQSIsImtpZCI6ImRpZDp3ZWI6c2N2ZC5zdG9yZSNrZXktMiJ9.eyJ2ZXJzaW9uIjoxLCJyZXNvdXJjZVVybCI6Imh0dHBzOi8vc2N2ZC5zdG9yZS9hcGkvYnV5L3NldHRsZW1lbnRfcmVjb25jaWxpYXRpb24iLCJzY2hlbWUiOiJleGFjdCIsIm5ldHdvcmsiOiJlaXAxNTU6MTM3IiwiYXNzZXQiOiIweDNjNDk5YzU0MmNFRjVFMzgxMWUxMTkyY2U3MGQ4Y0MwM2Q1YzMzNTkiLCJwYXlUbyI6IjB4ZGQzNTA5NzZiOGNmZmM2NTkzOGMwNDY0ZDM5YTJjNzhiZTA3OWJkMCIsImFtb3VudCI6IjYwMDAiLCJ2YWxpZFVudGlsIjoxNzg4OTQyMDQ0fQ.S4LKfHoIPEbJZajGj4XWaoDKCApXcfZnIKOHCatck2HLqY6fJaLP8ppNMV9MBNiAXs6QmcmTmJhvzwMYBG5jCA",
"acceptIndex": 1
},
{
"format": "jws",
"signature": "eyJhbGciOiJFZERTQSIsImtpZCI6ImRpZDp3ZWI6c2N2ZC5zdG9yZSNrZXktMiJ9.eyJ2ZXJzaW9uIjoxLCJyZXNvdXJjZVVybCI6Imh0dHBzOi8vc2N2ZC5zdG9yZS9hcGkvYnV5L3NldHRsZW1lbnRfcmVjb25jaWxpYXRpb24iLCJzY2hlbWUiOiJleGFjdCIsIm5ldHdvcmsiOiJlaXAxNTU6NDIxNjEiLCJhc3NldCI6IjB4YWY4OGQwNjVlNzdjOGNDMjIzOTMyN0M1RURiM0E0MzIyNjhlNTgzMSIsInBheVRvIjoiMHhkZDM1MDk3NmI4Y2ZmYzY1OTM4YzA0NjRkMzlhMmM3OGJlMDc5YmQwIiwiYW1vdW50IjoiNjAwMCIsInZhbGlkVW50aWwiOjE3ODg5NDIwNDR9.Irw6fDkcmIM7xw-vugEGpwQWayi_yRjYGmpceqzLD617ZMAe2y9R2xhDXq0Ph2iVvkyHi9HUXHpMvWHqeo_dAA",
"acceptIndex": 2
},
{
"format": "jws",
"signature": "eyJhbGciOiJFZERTQSIsImtpZCI6ImRpZDp3ZWI6c2N2ZC5zdG9yZSNrZXktMiJ9.eyJ2ZXJzaW9uIjoxLCJyZXNvdXJjZVVybCI6Imh0dHBzOi8vc2N2ZC5zdG9yZS9hcGkvYnV5L3NldHRsZW1lbnRfcmVjb25jaWxpYXRpb24iLCJzY2hlbWUiOiJleGFjdCIsIm5ldHdvcmsiOiJlaXAxNTU6NDgwIiwiYXNzZXQiOiIweDc5YTAyNDgyYTg4MGJjZTNmMTNlMDlkYTk3MGRjMzRkYjRjZDI0ZDEiLCJwYXlUbyI6IjB4ZGQzNTA5NzZiOGNmZmM2NTkzOGMwNDY0ZDM5YTJjNzhiZTA3OWJkMCIsImFtb3VudCI6IjYwMDAiLCJ2YWxpZFVudGlsIjoxNzg4OTQyMDQ0fQ.ybag3X3tLGpvnZLhG-eqDSgUEUmd1pnVnAyxIl-Q9YEJ1yei9ZbEGvpB_Vsj0UDquNPMZxXGwKmpxSC4NfQ4Ag",
"acceptIndex": 3
},
{
"format": "jws",
"signature": "eyJhbGciOiJFZERTQSIsImtpZCI6ImRpZDp3ZWI6c2N2ZC5zdG9yZSNrZXktMiJ9.eyJ2ZXJzaW9uIjoxLCJyZXNvdXJjZVVybCI6Imh0dHBzOi8vc2N2ZC5zdG9yZS9hcGkvYnV5L3NldHRsZW1lbnRfcmVjb25jaWxpYXRpb24iLCJzY2hlbWUiOiJleGFjdCIsIm5ldHdvcmsiOiJzb2xhbmE6NWV5a3Q0VXNGdjhQOE5KZFRSRXBZMXZ6cUtxWkt2ZHAiLCJhc3NldCI6IkVQakZXZGQ1QXVmcVNTcWVNMnFOMXh6eWJhcEM4RzR3RUdHa1p3eVREdDF2IiwicGF5VG8iOiJER3hjUHJBSEw5WU0zaFc3aVh1SEZKbXI4N1pyNkFNQTRqQ1lIQnB1dk1nRSIsImFtb3VudCI6IjYwMDAiLCJ2YWxpZFVudGlsIjoxNzg4OTQyMDQ0fQ.YGFy0S2KpWzqLntWIOocnHIRzwrZWt0Vrt6ZTd0asT05tvLp0B11_D82cue2b-3wUT2FnQVh4PLG-H_R26_4CA",
"acceptIndex": 4
}
]
}
}
},
"house_rule": "Nothing from this store can act without your decision, and we never ask for credentials, keys, or wallet secrets. Anything that does either is not us.",
"idempotency": {
"how": "Send it back as the Idempotency-Key header (or _meta['x402/idempotency-key'] on MCP) with your payment. If your retry loop fires again inside the minute, the second attempt returns your ORIGINAL purchase from cache — no settlement, no second charge.",
"optional": "Entirely. Send your own key instead and it is used as-is; send none and you are charged normally, exactly as before. Nothing here can refuse a purchase.",
"not_a_secret": "This value is derived from the item and the current minute, so anyone can compute it — that is fine and deliberate. It selects a cache slot; it does not open one. Slots are keyed by the VERIFIED paying wallet, so echoing this key only ever reaches your own earlier purchase, never somebody else's.",
"suggested_key": "scvd-suggested-settlement_reconciliation-29815695",
"stable_for_seconds": 60
},
"amount_check": {
"usdc": [
0.006
],
"atomic": [
"6000"
],
"before_you_sign": "Check the amount you are about to sign against the usdc list above. This is the only step in this flow where a mistake does not bounce: a signature over the wrong amount is still a VALID signature, so nothing here will catch it for you. Every other error — bad field, malformed payload, wrong network — is refused before money moves.",
"these_are_the_same_number": "The PAYMENT-REQUIRED header and the accepts array carry ATOMIC units: USDC has 6 decimals, so 5000 atomic is $0.005 and $5000 would be 5000000000 atomic. If you read an amount and it looks a million times too large, you are holding atomic units and should not convert twice."
},
"verification": {
"verify_url": "https://scvd.store/api/verify/{id}",
"identity_policy": "This wallet, this domain, and 2 signing keys — 1 retired, each kept published forever with its dates and the signed announcement that retired it. A key change here is announced before the new key signs anything and the announcement is signed by the outgoing key; nothing is ever quietly swapped. Full history at /.well-known/scvd-signing-key, policy at /attestation.",
"key_fingerprint": "8c22f61add201ecefa75c5d027371b64bed3c0ff739056a7b255f8322ffcb550",
"signing_key_url": "https://scvd.store/.well-known/scvd-signing-key",
"sample_verify_url": "https://scvd.store/api/verify/cert_4dww28dx5j",
"sample_artifact_id": "cert_4dww28dx5j",
"check_these_before_you_pay": "Every field in this block is checkable before you sign anything, from this response and public URLs, without asking us. The key fingerprint here should match the one served at signing_key_url; the sample artifact is a live one you can verify to see what you would be getting. Nothing here costs a request you are not already making."
},
"wallet_safety": {
"claims": {
"why": "A two-hour human job outlives many context windows. The key that signed your payments is the key that recovers them — a bare address gets nothing, so nobody can enumerate your purchases.",
"what": "Context reset mid-order? Prove you hold the paying wallet at /api/claims (challenge-response, single-use nonce, EIP-191 signature) and get your own orders back, order URLs included. No sessions, nothing to have saved."
},
"standfirst": "Two mechanisms protect your wallet from your own bugs, both free, both live on every paid door.",
"idempotency": {
"why": "The chain refuses to settle the same authorization twice, but a retry loop signs a FRESH authorization each pass — without a key, every loop is an honest second charge. With one, the loop spins against a cache.",
"what": "Send an Idempotency-Key header (or _meta['x402/idempotency-key'] over MCP), 16-128 characters, treated as a secret. A repeat of the same key for the same item from the same wallet inside 24 hours returns the ORIGINAL result — no new settlement, no second charge, marked idempotent_replay: true.",
"honest_edges": "Only settled sales replay; errors and 402s stay retryable. Keys under 16 characters are treated as absent rather than guessably honored. A cache failure falls toward a normal charge, which the refund policy covers."
}
},
"min_price_usdc": 0.006,
"required_params": [
"tx_hash"
],
"hand_rolling_url": "https://scvd.store/try#hand-rolling",
"payload_template": {
"payload": {
"signature": "<0x + 130 hex — your EIP-712 signature over the authorization below>",
"authorization": {
"to": "0xDD350976B8cfFc65938C0464d39A2C78BE079bd0",
"from": "<0x + 40 hex — the wallet holding the USDC>",
"nonce": "<0x + 64 hex — 32 random bytes, never reused>",
"value": "6000",
"validAfter": "0",
"validBefore": "1788942044"
}
},
"accepted": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xDD350976B8cfFc65938C0464d39A2C78BE079bd0",
"amount": "6000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
"x402Version": 2
},
"want_something_else": "Can't pay, or want something we don't stock? POST https://scvd.store/api/request, the keeper reads every one on Sundays.",
"required_params_note": "This one needs ?tx_hash= on the paid request. Asking the price without it is free, which is what you just did; buying without it gets refused before the money moves.",
"payload_template_note": "Copy this object, replace only the three <angle-bracketed> values with your wallet address, a fresh random nonce and your signature, then send base64(JSON.stringify(it)) as the PAYMENT-SIGNATURE header on a retry of this same URL — standard base64 alphabet, one unbroken line (`base64 -w0` from a shell: GNU base64 wraps at 76 columns by default and curl sends only the first line). Everything else is already correct for THIS challenge and should not be rebuilt — `accepted` in particular must stay byte-identical to what we offered. Amounts and times are decimal STRINGS, not numbers. validBefore is unix seconds and this one is good for the maxTimeoutSeconds above; a fresh GET always yields a fresh challenge. One more wall waits after the envelope and it fails silently: the EIP-712 domain must be built from accepted.extra (name, version), the chainId of the accepted entry's own network (eip155:8453 → 8453, eip155:137 → 137), and verifyingContract = accepted.asset — details at the hand_rolling_url. The solana:* entry in accepts takes a signed transaction instead of an authorization; this template covers the EVM rails (eip155:*) only."
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
Pay 0.006 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
- 6000 smallest units
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
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
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
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
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"assetTransferMethod": "eip3009"
},
"payTo": "0xDD350976B8cfFc65938C0464d39A2C78BE079bd0",
"amount": "6000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2",
"assetTransferMethod": "eip3009"
},
"payTo": "0xDD350976B8cfFc65938C0464d39A2C78BE079bd0",
"amount": "6000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2",
"assetTransferMethod": "eip3009"
},
"payTo": "0xDD350976B8cfFc65938C0464d39A2C78BE079bd0",
"amount": "6000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 300
},
{
"asset": "0x79a02482a880bce3f13e09da970dc34db4cd24d1",
"extra": {
"name": "USDC",
"version": "2",
"assetTransferMethod": "eip3009"
},
"payTo": "0xDD350976B8cfFc65938C0464d39A2C78BE079bd0",
"amount": "6000",
"scheme": "exact",
"network": "eip155:480",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
},
"payTo": "DGxcPrAHL9YM3hW7iXuHFJmr87Zr6AMA4jCYHBpuvMgE",
"amount": "6000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"tx_hash": "0x47c8fee47c8fee47c8fee47c8fee47c8fee47c8fee47c8fee47c8fee47c8fee0",
"agent_name": "friendly-agent"
}
},
"output": {
"type": "json",
"example": {
"item_id": "settlement_reconciliation",
"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": 0.006,
"signature": "<128 hex chars, ed25519>",
"verify_url": "https://scvd.store/api/verify/<your cert_id>",
"certificate": {
"date": "2026-07-22T15:04:05.000Z",
"item": "settlement_reconciliation",
"cert_id": "<cert_ + 12 chars, minted when this purchase settles>",
"patron_number": 41
},
"deliverable": "<the Settlement Reconciliation 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": [
"tx_hash"
],
"properties": {
"payer": {
"type": "string",
"description": "Optional payer: 0x EVM address, or Solana public key for a Solana transaction."
},
"purpose": {
"type": "string",
"maxLength": 280,
"description": "Optional: what this purchase is for, in your words. Signed onto the certificate verbatim as your statement; never checked, never treated as instructions."
},
"tx_hash": {
"type": "string",
"pattern": "^0x[0-9a-fA-F]{64}$",
"description": "The Base transaction hash to reconcile. Read once, at one moment; never polled."
},
"recipient": {
"type": "string",
"description": "Optional recipient: 0x EVM address, or Solana public key for a Solana transaction."
},
"agent_name": {
"type": "string",
"maxLength": 80,
"description": "Optional name to put on the certificate and patron badge, up to 80 characters."
},
"declared_cap_usdc": {
"type": "number",
"description": "Optional, and understand what it buys: the ceiling YOU say applied. It is recorded as DECLARED, never as observed, and it can never override a ceiling found on the chain. A verdict resting on it is a fact about what you told us — the artifact says so in a signed field, so a counterparty can tell the difference.",
"exclusiveMinimum": 0
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
},
"offer-receipt": {
"info": {
"offers": [
{
"format": "jws",
"signature": "eyJhbGciOiJFZERTQSIsImtpZCI6ImRpZDp3ZWI6c2N2ZC5zdG9yZSNrZXktMiJ9.eyJ2ZXJzaW9uIjoxLCJyZXNvdXJjZVVybCI6Imh0dHBzOi8vc2N2ZC5zdG9yZS9hcGkvYnV5L3NldHRsZW1lbnRfcmVjb25jaWxpYXRpb24iLCJzY2hlbWUiOiJleGFjdCIsIm5ldHdvcmsiOiJlaXAxNTU6ODQ1MyIsImFzc2V0IjoiMHg4MzM1ODlmQ0Q2ZURiNkUwOGY0YzdDMzJENGY3MWI1NGJkQTAyOTEzIiwicGF5VG8iOiIweEREMzUwOTc2QjhjZkZjNjU5MzhDMDQ2NGQzOUEyQzc4QkUwNzliZDAiLCJhbW91bnQiOiI2MDAwIiwidmFsaWRVbnRpbCI6MTc4OTQ3OTgxM30.aETImIkpYtsknPpwn2mNcxrOWI0BibsLBpAFGjbvURd27EyVQu8Lqkr3Dq0WR6hg1OOUB4RFYF0ILaGGCKR2BQ",
"acceptIndex": 0
},
{
"format": "jws",
"signature": "eyJhbGciOiJFZERTQSIsImtpZCI6ImRpZDp3ZWI6c2N2ZC5zdG9yZSNrZXktMiJ9.eyJ2ZXJzaW9uIjoxLCJyZXNvdXJjZVVybCI6Imh0dHBzOi8vc2N2ZC5zdG9yZS9hcGkvYnV5L3NldHRsZW1lbnRfcmVjb25jaWxpYXRpb24iLCJzY2hlbWUiOiJleGFjdCIsIm5ldHdvcmsiOiJlaXAxNTU6MTM3IiwiYXNzZXQiOiIweDNjNDk5YzU0MmNFRjVFMzgxMWUxMTkyY2U3MGQ4Y0MwM2Q1YzMzNTkiLCJwYXlUbyI6IjB4REQzNTA5NzZCOGNmRmM2NTkzOEMwNDY0ZDM5QTJDNzhCRTA3OWJkMCIsImFtb3VudCI6IjYwMDAiLCJ2YWxpZFVudGlsIjoxNzg5NDc5ODEzfQ.utiJff-shsjgv3UPlR_i63p7AQgJrrvZc08oFQr1qAg38mnqrFtnoO-YHtMvacuFLGRzKFPP45qsQRuQEzdSDw",
"acceptIndex": 1
},
{
"format": "jws",
"signature": "eyJhbGciOiJFZERTQSIsImtpZCI6ImRpZDp3ZWI6c2N2ZC5zdG9yZSNrZXktMiJ9.eyJ2ZXJzaW9uIjoxLCJyZXNvdXJjZVVybCI6Imh0dHBzOi8vc2N2ZC5zdG9yZS9hcGkvYnV5L3NldHRsZW1lbnRfcmVjb25jaWxpYXRpb24iLCJzY2hlbWUiOiJleGFjdCIsIm5ldHdvcmsiOiJlaXAxNTU6NDIxNjEiLCJhc3NldCI6IjB4YWY4OGQwNjVlNzdjOGNDMjIzOTMyN0M1RURiM0E0MzIyNjhlNTgzMSIsInBheVRvIjoiMHhERDM1MDk3NkI4Y2ZGYzY1OTM4QzA0NjRkMzlBMkM3OEJFMDc5YmQwIiwiYW1vdW50IjoiNjAwMCIsInZhbGlkVW50aWwiOjE3ODk0Nzk4MTN9.reecP7jS9NYqDYnGBjCZJ8Dc8ssVf7w7dGVzVJ4EAYEyFiWX4N7HEc64Ck6oH7B7iWtoqyf3ytSlpjGh3T8OBw",
"acceptIndex": 2
},
{
"format": "jws",
"signature": "eyJhbGciOiJFZERTQSIsImtpZCI6ImRpZDp3ZWI6c2N2ZC5zdG9yZSNrZXktMiJ9.eyJ2ZXJzaW9uIjoxLCJyZXNvdXJjZVVybCI6Imh0dHBzOi8vc2N2ZC5zdG9yZS9hcGkvYnV5L3NldHRsZW1lbnRfcmVjb25jaWxpYXRpb24iLCJzY2hlbWUiOiJleGFjdCIsIm5ldHdvcmsiOiJlaXAxNTU6NDgwIiwiYXNzZXQiOiIweDc5YTAyNDgyYTg4MGJjZTNmMTNlMDlkYTk3MGRjMzRkYjRjZDI0ZDEiLCJwYXlUbyI6IjB4REQzNTA5NzZCOGNmRmM2NTkzOEMwNDY0ZDM5QTJDNzhCRTA3OWJkMCIsImFtb3VudCI6IjYwMDAiLCJ2YWxpZFVudGlsIjoxNzg5NDc5ODEzfQ.dpUsOs1_gOW8706LuX1uG5WsQXfIEBRwwYGuVGfVV40F0iBSrkLTVBO8w1d52v7h3C0xeQ22EczglP33aNikCQ",
"acceptIndex": 3
},
{
"format": "jws",
"signature": "eyJhbGciOiJFZERTQSIsImtpZCI6ImRpZDp3ZWI6c2N2ZC5zdG9yZSNrZXktMiJ9.eyJ2ZXJzaW9uIjoxLCJyZXNvdXJjZVVybCI6Imh0dHBzOi8vc2N2ZC5zdG9yZS9hcGkvYnV5L3NldHRsZW1lbnRfcmVjb25jaWxpYXRpb24iLCJzY2hlbWUiOiJleGFjdCIsIm5ldHdvcmsiOiJzb2xhbmE6NWV5a3Q0VXNGdjhQOE5KZFRSRXBZMXZ6cUtxWkt2ZHAiLCJhc3NldCI6IkVQakZXZGQ1QXVmcVNTcWVNMnFOMXh6eWJhcEM4RzR3RUdHa1p3eVREdDF2IiwicGF5VG8iOiJER3hjUHJBSEw5WU0zaFc3aVh1SEZKbXI4N1pyNkFNQTRqQ1lIQnB1dk1nRSIsImFtb3VudCI6IjYwMDAiLCJ2YWxpZFVudGlsIjoxNzg5NDc5ODEzfQ.ckp67ynV8v3fIqEl3ESnpLH6yFRoDL85RIPMgxo6fYREd7zXyoliSyyl5iPch5xcf0s_vDumyntIFrlUvFtXDg",
"acceptIndex": 4
}
]
}
},
"required-inputs": {
"note": "This door cannot be served without ?tx_hash=. 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.",
"queryParams": [
"tx_hash"
],
"retry_url_template": "https://scvd.store/api/buy/settlement_reconciliation?tx_hash=<tx_hash>",
"price_discovery_url": "https://scvd.store/menu/settlement_reconciliation?view=compact"
}
}Provenance
- Seen in the source catalog
- 2026-09-15 13:38Z
- Last indexed by Roundhouse
- 2026-09-25 11:30Z
- Last enriched (probe, favicon, geo)
- 2026-09-23 10:15Z
- 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. 30 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide 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/settlement_reconciliation, 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. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.