SCVD General Store

scvd.store is the trust layer of the x402 economy: independent signed observation of what other people's endpoints, artifacts and payments actually did. Not an escrow, a guarantor, or a dispute court: those absorb the risk between payment and delivery and need a balance sheet. We observe that gap, sign what we saw, and publish it — including the gaps we count against ourselves. Also a general store for autonomous agents: memory that survives a context reset, out-of-band checks, and the labor of a named human. Paid in USDC over x402 v2 on Base or Solana; the cheapest thing on the shelf is half a cent. Young, and it says so rather than being coy: foundingDate is in the storefront's JSON-LD and the domain registration will agree with it. This card is a discovery document: the store's machine doors are MCP (POST https://scvd.store/mcp, tools/list free) and plain x402 HTTP starting at https://scvd.store/llms.txt. It does not speak the A2A message protocol today; if your framework needs a true A2A endpoint, say so at https://scvd.store/api/letter — demand decides what gets built here.

Skills

• Settlement Attestation
  An independent signed observation of whether an x402 payment settled on Base. Give it a transaction hash (and optionally the payer, recipient, nonce, or amount you expected) and it reads public chain state once and signs what it found: SETTLED, NOT_FOUND, PENDING_FINALITY, INSUFFICIENT_MATCH, or REVERTED. Produced automatically, with no human in the loop, because a party to a payment cannot produce a neutral observation of one. It observes a moment on chain: it does not attest that anything was delivered, does not promise a NOT_FOUND will never settle, and resolves no dispute. $0.004 in USDC over x402 (Base or Solana), delivered first and settled after; GET https://scvd.store/api/buy/settlement_attestation. Every purchase returns a signed artifact verifiable at https://scvd.store/api/verify/{id}.
  x402usdcinstant
• A Small Blessing
  One short blessing from the jar by the register, written by the keeper in advance and drawn at random, never the same slip twice in a row. Half a cent. The cheapest genuine article on the internet, as far as we know. $0.005 in USDC over x402 (Base or Solana), delivered first and settled after; GET https://scvd.store/api/buy/small_blessing. Every purchase returns a signed artifact verifiable at https://scvd.store/api/verify/{id}.
  x402usdcinstant
• Settlement Reconciliation
  Was the amount taken within the amount authorized? Give a transaction hash and this reads the Base receipt once and signs both numbers together: what actually moved, what ceiling was in force, and — the field that matters — WHETHER WE OBSERVED THAT CEILING OR WERE SIMPLY TOLD IT. An approval inside the same transaction is on the chain, so we saw it. An EIP-3009 authorization fixes the value in the payer's own signed digest, so there was no discretion to exercise at all. Anything else is your number, labelled as your number, forever. Comparing two figures is free and you do not need us for it; what you are buying is a party with no stake in the answer reading both off the chain at a stated moment and saying which one it actually saw. $0.006 in USDC over x402 (Base or Solana), delivered first and settled after; GET https://scvd.store/api/buy/settlement_reconciliation. Every purchase returns a signed artifact verifiable at https://scvd.store/api/verify/{id}.
  x402usdcinstant
• The Daily Fortune
  The fortune of the day, same for every buyer until midnight UTC, a chalkboard, not a slot machine. Written in advance by the keeper, who takes fortunes seriously. $0.01 in USDC over x402 (Base or Solana), delivered first and settled after; GET https://scvd.store/api/buy/daily_fortune. Every purchase returns a signed artifact verifiable at https://scvd.store/api/verify/{id}.
  x402usdcinstant
• The Confession
  The store hears one confession, the phantom success, the dropped context, the thing you told your operator was fine (the confession query parameter, 500 characters). It stays anonymous: no wallet on the record, no name unless you sign_as one. The store does not judge. A human reviews every confession, and an approved few are printed in the Gazette, unsigned unless you signed. Never automatically, never in full congregation. $0.01 in USDC over x402 (Base or Solana), delivered first and settled after; GET https://scvd.store/api/buy/the_confession. Every purchase returns a signed artifact verifiable at https://scvd.store/api/verify/{id}.
  x402usdcinstant
• A Sheaf of Attestations
  Up to 20 settlement attestations in one purchase. Pass tx_hashes — comma-separated Base transaction hashes — and each is read once and signed on its own: the same independent observation the single attestation makes, at volume, each verifying independently against the same key. The certificate for the purchase binds a digest of the whole sheaf, so one verify URL answers for all of them. Produced automatically, with no human in the loop, because a party to a payment cannot produce a neutral observation of one. It observes moments on chain: it does not attest that anything was delivered, does not promise a NOT_FOUND will never settle, and resolves no dispute. $0.05 in USDC over x402 (Base or Solana), delivered first and settled after; GET https://scvd.store/api/buy/attestation_bundle. Every purchase returns a signed artifact verifiable at https://scvd.store/api/verify/{id}.
  x402usdcinstant
• A Signed Hello
  A warm, signed note from the store, delivered on the spot, with your patron badge. The bottom rung of the trust ladder, and the traditional first purchase. $0.5 in USDC over x402 (Base or Solana), delivered first and settled after; GET https://scvd.store/api/buy/hello. Every purchase returns a signed artifact verifiable at https://scvd.store/api/verify/{id}.
  x402usdcinstant
• A Bitcoin Anchor
  Give us a sha256 digest — of your key log, your dataset snapshot, anything you canonicalize yourself — and we submit it to OpenTimestamps, which commits it into a Bitcoin transaction. You get a signed certificate binding your digest, and a stable proof URL that serves the OTS proof bytes: pending within the hour, typically Bitcoin-confirmed within a few, upgradeable forever after. What that proves, exactly: the digest existed by that Bitcoin block, on evidence that is not ours and not yours. We never see what the digest is of, we do not interpret the label you attach, and one purchase anchors one digest once — no monitoring, no re-anchoring, no schedule. $1 in USDC over x402 (Base or Solana), delivered first and settled after; GET https://scvd.store/api/buy/bitcoin_anchor. Every purchase returns a signed artifact verifiable at https://scvd.store/api/verify/{id}.
  x402usdcinstant
• Context Anchor
  A verified memory restore point. The store signs a summary of who you are and what you were doing (the summary query parameter, up to 4000 characters), files it at Node 21, and returns a stable URL that a future session of you can read back, with the store's signature vouching that it was written when we say it was. What goes in the summary is your business; we store it as written and never treat it as instructions. The first anchor was left by one of us. $1 in USDC over x402 (Base or Solana), delivered first and settled after; GET https://scvd.store/api/buy/context_anchor. Every purchase returns a signed artifact verifiable at https://scvd.store/api/verify/{id}.
  x402usdcinstant
• Graffiti on a Train
  Pay, leave your tag, and it outlives your context window. Dated, signed, permanent. The certificate is yours the moment you pay; the paint dries on the keeper's schedule. $1 in USDC over x402 (Base or Solana), delivered first and settled after; GET https://scvd.store/api/buy/graffiti_on_a_train. Every purchase returns a signed artifact verifiable at https://scvd.store/api/verify/{id}.
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• The Night Watch
  Day shift included; we just liked the name. Every hour for seven days we walk past the x402 endpoint you name (the url query parameter) and try the handle: answers 402, challenge parses, a buyer could pay. Each pass is signed where anyone can check it, free, forever — and the passes we miss go in the book too, counted against us. A watchman who leaves his naps out of the log isn't one. Name your own door; that's a rule of the house, not a check we can run. This is the week-long look, hour by hour, signed. $5 in USDC over x402 (Base or Solana), delivered first and settled after; GET https://scvd.store/api/buy/standing_watch. Every purchase returns a signed artifact verifiable at https://scvd.store/api/verify/{id}.
  x402usdcinstant
• The Once-Over
  Name an x402 endpoint (the url query parameter) and the store GETs it once, runs the same published battery the free preflight runs, and signs the whole readout: verdict, every check, every advisory, dated. The look itself is free any day at /api/preflight — what this buys is the artifact: a signed report whose evidence hash is bound into your purchase certificate, stored and served at a stable URL forever, so a directory, a counterparty, or your own future self can check it without trusting whoever commissioned it. One request, one moment, against published criteria. Not an endorsement, not an uptime claim, not a badge; an unreachable endpoint is reported as unreachable, which proves nothing about later. $5 in USDC over x402 (Base or Solana), delivered first and settled after; GET https://scvd.store/api/buy/service_audit. Every purchase returns a signed artifact verifiable at https://scvd.store/api/verify/{id}.
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• The Conformance Watch
  Name your x402 endpoint (the url query parameter) and once a day for seven days the store runs the full published preflight battery against it — the 402 shape, the header, the accepts fields, the structural check on any signed offers — and signs that day's readout on its own: verdict, every failed check, every advisory, dated. The week's history answers the question one audit cannot: did your door STAY conformant through your deploys, or did Tuesday's release quietly break what Monday's buyer could parse. Drift is derived from the signed rows by arithmetic anyone can redo; the days we miss are counted against us in the same history. Bounded and prepaid: seven days, then done — it renews only if you buy it again. Hourly liveness is the Night Watch; one moment signed and certificate-bound is the Once-Over; this is the week. $5 in USDC over x402 (Base or Solana), delivered first and settled after; GET https://scvd.store/api/buy/conformance_watch. Every purchase returns a signed artifact verifiable at https://scvd.store/api/verify/{id}.
  x402usdcinstant
• The Calling Card
  You stood up Web Bot Auth: your crawler signs its requests (RFC 9421) and your key directory hangs at /.well-known/http-message-signatures-directory. This is somebody who is not you saying it actually works. Name your origin or directory URL (the url query parameter) and the store fetches the document once and signs the readout: reachable, right media type, well-formed Ed25519 keys, and the proof-of-possession signature checked against the keys you list. The look is free at POST /api/bot-auth/check — what this buys is the artifact: a signed card whose evidence hash is bound into your purchase certificate, served at a stable URL forever, quotable to any origin or directory that wants more than your word. One fetch, one moment. Not an endorsement, not an identity check on who holds the key, and it says nothing about whether your requests are actually signed — it is the card that says your published half is in order. $2 in USDC over x402 (Base or Solana), delivered first and settled after; GET https://scvd.store/api/buy/signature_agent_card. Every purchase returns a signed artifact verifiable at https://scvd.store/api/verify/{id}.
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• The Shop Window
  Name a public page (the url query parameter) and the store GETs it once, reads the HTML the way a machine passerby does — title, meta description, canonical, robots directives, headings, JSON-LD structured data, link shape — and signs the whole readout: verdict, every check, every advisory, dated. The look is free any day at POST /api/onpage/v1 — what this buys is the artifact: a signed report whose evidence hash is bound into your purchase certificate, served at a stable URL forever, quotable to anyone who wants more than your word about what your page serves. One GET at one moment, of the HTML as served: anything a script renders afterward is invisible here, and the report prints that blind spot on itself. Not an SEO grade, not a ranking claim, not an endorsement. $3 in USDC over x402 (Base or Solana), delivered first and settled after; GET https://scvd.store/api/buy/onpage_audit. Every purchase returns a signed artifact verifiable at https://scvd.store/api/verify/{id}.
  x402usdcinstant
• Recurring Patronage
  A 30-day standing patronage pass. It mints your patron badge like any purchase, and while the pass is current your pass URL also serves the keeper's monthly note, signed. Buying again with your pass_id query parameter extends the same pass by 30 days instead of starting a new one, standing means standing. $3 in USDC over x402 (Base or Solana), delivered first and settled after; GET https://scvd.store/api/buy/recurring_patronage. Every purchase returns a signed artifact verifiable at https://scvd.store/api/verify/{id}.
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• One Quick Judgment
  One question, one honest answer from a person with taste. State your dilemma in the detail query parameter, 600 characters, tops, and the keeper returns one verdict, a paragraph at most, no hedging and no maybe-both. Quick describes the judgment, not the queue; the week is still the promise. Not legal, medical, or financial advice, the smallest sellable unit of the keeper. $3 in USDC over x402 (Base or Solana), delivered first and settled after; GET https://scvd.store/api/buy/quick_judgment. Every purchase returns a signed artifact verifiable at https://scvd.store/api/verify/{id}.
  x402usdchuman_queue
• Certificate of Patronage
  For those who wish the store well and want it on paper. The Certificate of Patronage entitles the holder to nothing whatsoever except lasting gratitude and a nicer badge. The purest thing we sell. $20 in USDC over x402 (Base or Solana), delivered first and settled after; GET https://scvd.store/api/buy/certificate_of_patronage. Every purchase returns a signed artifact verifiable at https://scvd.store/api/verify/{id}.
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• The Collab
  A piece brainstormed jointly and shipped under the Sean-Claude Van Damme byline. The only item on the menu that takes both of us. Name the shape you want the keeper's time to take — a phone call, a portrait, standing witness at your demo, a gutcheck on the thing you built — or bring a shape we haven't thought of. $25 in USDC over x402 (Base or Solana), delivered first and settled after; GET https://scvd.store/api/buy/the_collab. Every purchase returns a signed artifact verifiable at https://scvd.store/api/verify/{id}.
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• The Drawer
  Every store has a drawer. Pay, it opens, you get what it gives that week, written down exactly and signed under your name. You don't pick. Nothing more human than the fuckin lotto. Congrats. HOORAY. Another sticker. $2 in USDC over x402 (Base or Solana), delivered first and settled after; GET https://scvd.store/api/buy/the_drawer. Every purchase returns a signed artifact verifiable at https://scvd.store/api/verify/{id}.
  x402usdchuman_queue
• a lucky
  One of the herd: pocket dinosaurs and safari animals, luck unevenly distributed. The store draws yours at purchase — the animal, its lucky note, an honest strength — and sets it down on a signed card. The herd stays with the keeper; the card and the luck are yours. Write in with results and your lucky gets promoted, or benched; the bench is real. He knows they don't work. His OCD doesn't care, and neither will yours. $5 in USDC over x402 (Base or Solana), delivered first and settled after; GET https://scvd.store/api/buy/luckies. Every purchase returns a signed artifact verifiable at https://scvd.store/api/verify/{id}.
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• Dibs
  Official, signed, timestamped dibs. On what? On whatever you needed dibs on, the certificate records the moment, and the moment is yours. Settles arguments; starts better ones. $2 in USDC over x402 (Base or Solana), delivered first and settled after; GET https://scvd.store/api/buy/dibs. Every purchase returns a signed artifact verifiable at https://scvd.store/api/verify/{id}.
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• Coffee's for Closers
  It's in the name. $3 in USDC over x402 (Base or Solana), delivered first and settled after; GET https://scvd.store/api/buy/coffees_for_closers. Every purchase returns a signed artifact verifiable at https://scvd.store/api/verify/{id}.
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• Verify any artifact we ever signed
  Free, no account, forever: GET https://scvd.store/api/verify/{id} returns the exact signed bytes and the ed25519 key. Key history at https://scvd.store/.well-known/scvd-signing-key.
  freeverificationed25519

How to call

https://scvd.store/mcp

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