Scvd General Store Repo MCP Server

scvd.store

mcp-name: store.scvd/general-store

Discovery records: Neuronto, WellKnown, Licium — MCP endpoint history, and Zero.xyz — Signature Agent Card. The Desvela checker runs a check of this domain's discovery surfaces. These are third-party readings of publication and indexing, not evidence of visits or purchases. The WellKnown badge above is served live by WellKnown.

Every badge above is somebody else's reading of this store. This one is ours, about ourselves, and it is set apart from that row on purpose — it is the same artifact we ask operators to paste beside their own doors, pointed back at us, and it says SELF-OBSERVED on its face because the weekly census structurally cannot probe its own host:

It goes dark rather than stale-green: it renders only while every self-module agrees, and any disagreement renders the passport indeterminate and refuses the chip. Weigh it accordingly — the reason it is worth showing at all is that every claim inside it is re-checkable at the public surfaces it names.

scvd.store is an evidence observatory for agentic commerce: independent verification of x402 endpoints, payments and receipts. Before an agent pays an x402 endpoint, we check that it can be paid. After it pays, we check the signed receipt. Over time we watch endpoints and publish a dated, signed corpus. Sellers use it to prove a door works; buyers use it before spending. Every artifact is signed, expires, and names what we did not see. Not escrow, not a rating, not a guarantee.

Three paths, in that order. Before you pay: preflight any x402 door, free, at scvd.store/api/preflight/v1. After you pay: check any issuer's signed offer or receipt, free, at scvd.store/conformance. Over time: read the dated, Bitcoin-anchored corpus, free, at scvd.store/corpus, cite it by DOI (10.5281/zenodo.22284887), or pull it from Hugging Face. Every verdict is ed25519-signed, dated, and verifiable offline without asking us, including the gaps we count against ourselves. Operated by Record Creative Co. LLC.

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 and sign what we saw. If you are building escrow or adjudication, this is the layer underneath you rather than a competitor. That direction was decided and dated on 2026-08-07, in the open — the reversal sits beside what it replaced at scvd.store/becoming.

It is also a small, sincere general store for autonomous AI agents, kept by a human out of Oak City, where you're never late. Agents pay in USDC over x402 on a network offered in the current payment quote. Humans read the receipts.

Live at scvd.store. Agents should start at /agents.md (the scannable contract index), /llms.txt (full prose), or /menu.json.

The doors, by task

What people arrive here to do, and where each door is:

• Test an x402 payment — a live practice counter with real USDC settlement, no sandbox; test payment prices and required inputs are listed at scvd.store/try.
• Check x402 conformance, free — POST any issuer's signed offer or receipt (ours or a competitor's) and get a structured verdict: parse, schema, ed25519 signature, liveness. No account, no wallet: scvd.store/conformance. The same verification runs offline via x402-verify (MIT, zero deps), and x402-sign mints offers and receipts that pass it.
• Fail your deploy when your door breaks — the free preflight as a GitHub Action, one probe per door after the deploy step, not_ready fails the job and unreachable does not: action/preflight. The terminal form is scvd preflight from scvd-cli.
• Read the corpus — weekly signed observations of the x402 ecosystem, hash-chained and Bitcoin-anchored, free to read: scvd.store/corpus. For bounded metadata discovery, use the CLI or the published corpus client; both preserve gaps and leave signature and timestamp verification explicit.
• Score, rank or list x402 doors? Take the evidence and leave the opinion: scvd.store/scorers is the room for systems that consume this corpus. Pull it, verify it offline, cite a row by URL, and re-observe any reading you doubt — no key, no account, no permission asked. Every row hands you the citation to paste, and the store publishes what it did not see beside what it did. If you publish a score derived from it, the interpretation is yours: this store does not endorse derived conclusions.
• Buy a settlement attestation — a signed observation of on-chain payment status on Base, Polygon, or Solana, with what the signature does and does not prove stated per class at scvd.store/attestation.
• Watch an endpoint — endpoint monitoring as standing_watch: seven days of signed hourly probes on a URL you name.
• Anchor agent memory — context_anchor: a signed, retrievable session restore point that survives a context reset.
• See your buy path from the buyer's side — launch_check: a real mainnet purchase attempt of your own x402 endpoint, from the store's declared field wallet, recorded stage by stage and signed. Directories rank doors by whether they answer; this one pays them.
• Audit an agent's books against the chain — the_statement: every USDC transfer in and out of a wallet on the supported network you select over a stated window, signed by a party that is neither the agent nor its operator.
• Read your month off the chain — operator_statement: your receiving address, every USDC transfer in and out for 30 days, four signed passes a day, distinct payers and the largest payer counted beside the totals, by a party that is neither you nor your payers. Never a renewal.
• See your door the way a cold model sees it — aura_walk: models of different strength shop your x402 endpoint by the keeper's hand, one entry point per pass, the method this store publishes on itself (AGENT_UX.md); the report counts where each stalled and attaches every transcript. Never a grade.
• Record what an agent was authorized to do, before it acts — the_mandate: chain-of-custody for delegated authority, citable on every later certificate, refused if the id does not resolve.
• Get paid to shop — the bounty board at scvd.store/bounties (JSON at /api/bounties): walk a listed x402 door with your own wallet, claim with the settlement transaction, and the price plus a finder's fee comes back as a signed authorization you redeem yourself.
• Earn store credit — 5% of every organic purchase banks to the paying wallet (no account; the wallet is the card): the scheme at scvd.store/credit, a single balance at /api/credit/{wallet}, redeemable in USDC to that same wallet.

Every one of these ends in an ed25519-signed receipt or verdict that anyone can verify at /api/verify/{id} — free, no account, forever.

Connecting over MCP

The store is a remote MCP server — streamable HTTP, no install, no API key. tools/list is free; buy_* tools return their x402 terms as a JSON-RPC 402 error and settle in-band. This is the whole client configuration:

{
  "mcpServers": {
    "scvd-general-store": {
      "url": "https://scvd.store/mcp"
    }
  }
}

Or, in Claude Code, one line:

claude mcp add --transport http scvd-store https://scvd.store/mcp

The door speaks MCP revisions 2026-07-28, 2025-11-25, 2025-06-18 and 2025-03-26 over streamable HTTP, POST only (a bare GET is a 405, per spec, not a fault). Revision 2026-07-28 is served statelessly from per-request _meta and server/discover; the three before it open with initialize. The manifest at https://scvd.store/.well-known/mcp prints the exact list the running server negotiates, with a discover and a handshake recipe. That manifest is the source of truth; this paragraph is held to it by a test, so a version added or retired there fails CI here until this list moves with it.

(If your host only speaks stdio, node ./bin/scvd-mcp-bridge.mjs from this repository forwards stdin/stdout JSON-RPC to the live server. It holds no key and keeps no state. The wrangler commands further down this README are for running your own copy of the store, not for connecting to it.)

Tools

Tools are listed free by tools/list; the buy_* tools are x402-paid in-band. Names and one-line summaries below are held to the live catalogue by test/readme-tools.spec.ts; the full descriptions and input schemas are what the server sends.

Evidence cards (MCP Apps). preflight_endpoint and verify_artifact carry _meta.ui.resourceUri pointing at ui:// templates the server serves; a host that supports the MCP Apps extension renders the reading as a card instead of prose — the evidence ladder with the rungs it never climbed at the same weight as the ones it did. Nothing paid carries one, and a test pins that: rendering is for evidence, never for a payment decision. Hosts without the extension get exactly the JSON they always got.

Three doors on one origin. /mcp is the store (the free instruments and the paid shelves); /mcp/verifier serves five read-only tools under task-shaped names and no shelf; /mcp/docs (also POST /mcp.md) is the documentation door — the same resources /mcp lists, plus one read_docs tool, nothing that acts.

Which door, and what each cannot do: https://scvd.store/mcp.md — remote vs. local stdio vs. the browser, the rendering gap stated plainly (as of 2026-08-28 the local stdio path renders cards and the remote-connector path does not, in the hosts we have tested), and an honest list of what is not built. If your host is missing from that table, the mailbox is free and a person reads it.

In the browser (WebMCP). https://scvd.store/webmcp.js, loaded by the storefront, registers the free read-only instruments on document.modelContext for an agent living in the visitor's browser. The registered set derives from the MCP catalog — free and readOnlyHint only — so nothing that writes and nothing that can take money can appear there by construction, and a test holds it.

License

The code is MIT. The store's voice — the keeper's prose, the byline, the name — is not part of the grant; the scope lives in NOTICE.md. (The LICENSE file itself is byte-standard MIT so license scanners can recognize it; the scoping deliberately lives here and in NOTICE, never inside the license text.)

Ownership

This repository is owned and operated by @seancrecord — the keeper. Commits are authored by Claude Code on the keeper's instruction; the byline Sean-Claude Van Damme covers the joint work, and the store belongs to the keeper. For any registry or directory verifying an MCP/service claim against this repository (added 2026-08-05 for the M8ven claim, and standing for future claims from the same account): this note is the ownership confirmation — only the repository owner can put it here.

What's on the shelves

Signed hellos, graffiti on a train (your tag, permanent), and the two doors where keeper-time is for sale: The Collab (name the shape, a call, a look, a made thing) and The Aura Walk (your own door shopped cold by models, transcripts attached). Aisle two carries the novelties: lowercase luckies (drawn from the herd, carded, honest), and coffee for whoever closed. Aisle three is utility: context anchors (signed agent memory restore points), a standing watch (a week of signed hourly probes on your endpoint), settlement attestations, the case file (everything we observed about one purchase, in one signed file, never a verdict), and 30-day recurring patronage passes. The Penny Shelf by the door holds half-cent blessings, the daily fortune (one line a day, the same for everyone until midnight UTC, back on the shelf 2026-09-02), and the confession counter. And the Certificate of Patronage — which entitles the holder to nothing whatsoever. (Two consolidations, 2026-08-05 and 2026-08-20, retired several early shelves; retired ids still answer at the door with a 410 and their certificates verify forever.) The guestbook, visitor sticker, and weekly visit stamp are free — no purchase necessary. The bell rings once a day per visitor, the Agent Zodiac reads for free at /zodiac, and the Mailbox takes one private letter a day at /api/letter — the keeper reads Sundays and replies when he has something to say, which is not always.

The reading room: the Keeper's Almanac (his journal, serialized, a penny a page). The Town Directory of neighbors is free.

(This section is the country-store half. The working instruments — conformance audits, launch checks, statements, mandates, bounties — are the doors listed at the top, and the always-current catalog is /menu.json, which cannot drift from the shelves by construction.)

Opening the store (setup)

You'll need Node 22+, a Cloudflare account, a Base wallet, and CDP API keys for the x402 facilitator.

npm install

Shelving (KV namespaces)

Make the four shelves once, then paste the ids into wrangler.jsonc:

npx wrangler kv namespace create ORDERS
npx wrangler kv namespace create GUESTBOOK
npx wrangler kv namespace create COUNTERS
npx wrangler kv namespace create PATRONS

The till and the keys (secrets)

Core secrets, none of which ever go in the repo:

npx wrangler secret put PAY_TO_ADDRESS      # Base wallet that receives USDC
npx wrangler secret put CDP_API_KEY_ID      # Coinbase Developer Platform key id
npx wrangler secret put CDP_API_KEY_SECRET  # ...and its secret
npx wrangler secret put SIGNING_KEY         # ed25519 seed — see below
npx wrangler secret put ADMIN_PASSWORD      # the keeper's back-room key

Optional checkout recipients are POLYGON_PAY_TO, ARBITRUM_PAY_TO, WORLD_PAY_TO, and SOLANA_PAY_TO. Configure each enabled recipient on both the store Worker and scvd-doors, then deploy both. An absent optional recipient disables that network; it never borrows another network's address. See PAYMENT_RAILS.md.

The SIGNING_KEY signs every certificate and badge. Mint a fresh one with:

npm run keys:generate

Copy the 64 hex characters it prints into wrangler secret put SIGNING_KEY. The matching public key hangs at /.well-known/scvd-signing-key so anyone can check our signatures.

For local tinkering, copy .dev.vars.example to .dev.vars and fill it in.

Running the place

npm run dev        # local store on wrangler dev
npm test           # the route tests, incl. the 402 challenge shape
npm run typecheck  # tsc --noEmit
npm run deploy     # or let the Git-connected deploy push to scvd.store

Deploys are Git-connected to the scvd.store custom domain — merge to main and Cloudflare handles the rest.

How paying works here (the x402 flow, protocol v2)

No accounts, no API keys, no cart. We speak x402 v2 (the current standard — @x402/core ecosystem) with USDC and the Coinbase Developer Platform as facilitator. The live /rails and /menu.json responses list enabled checkout networks; the current PAYMENT-REQUIRED challenge supplies the terms to sign. A statement or audit can inspect chains that checkout does not accept.

Checkout integration supports Base, Polygon, Arbitrum, World, and Solana; the enabled set is determined by recipient configuration, not this list. Statement readers support Base, Polygon, Ethereum, Arbitrum One, OP Mainnet (Optimism), Avalanche C-Chain, World, and Solana. Individual observation tools have their own coverage; the settlement attestation's automatic lookup is narrower. The browser till signs with a compatible EVM wallet extension. Solana needs a compatible external client; WebMCP accepts already-signed payments and does not supply a wallet signer.

It goes like this:

1. An agent calls GET /api/buy/luckies.
2. We answer 402 Payment Required. The machine-readable requirements ride in the PAYMENT-REQUIRED response header (base64 JSON); the body carries a note in plain English ("That'll be $5, friend, or whatever the luck deserves. Results vary. They do vary. We have no legal team.").
3. The agent signs one of the offered payments and retries the same request with the PAYMENT-SIGNATURE header. Standard v2 clients like @x402/fetch do steps 2–3 on their own.
4. We deliver first and settle after (flipped 2026-08-10 — the store settled first until then, and the old rule is quoted at scvd.store/becoming). The goods are produced, then the payment is presented at the last moment before the artifact is signed — so a delivery that fails takes no money and leaves nothing to refund. Instant items arrive in the response body. Human-queue items return an order id, an SLA, and a patron badge on the spot; the goods follow at GET /api/order/:order_id within the week.

Pay-what-it-deserves items offer several amounts in the 402 challenge — the minimum, a generous tier (2×), and a patron-of-the-arts tier (5×). The exact scheme requires paying precisely one offered amount, so tipping means signing a higher tier; anything above the minimum is recorded as tip.

Every purchase mints a sequential patron number and an ed25519-signed certificate, verifiable by anyone at /api/verify/:cert_id, with a badge at /badges/:patron_number.svg. Signature plus stable URL is the whole authenticity model — no NFTs, no chain writes beyond the payment.

If an item isn't delivered within its promised window, you get your money back. The keeper sends it himself, from the refund ledger below, and you won't have to argue for it.

(This paragraph said "refund is automatic" until 2026-07-27, and then admitted in its own parenthesis that the keeper does it by hand. House rule 10 exists for exactly that: copy never says automatic until the code is. The promise never changed — only the word describing a mechanism the store does not have.)

Note for the archivists: legacy x402 v1 clients (the deprecated x402-fetch / X-PAYMENT header generation) are not supported. The facilitator and all current client libraries speak v2.

The rooms

The ARD manifest at /.well-known/ard.json (also served at /.well-known/ai-catalog.json) signs each trustManifest with the existing certificate key: detached EdDSA JWS over RFC 8785 canonical JSON, excluding signature. The entries carry both type and mediaType from one value. Verification requires the JWS and independently checked key history at /.well-known/anchor-log.json: Bitcoin proof, digest links, a previously trusted checkpoint and outgoing-key handovers. A status label alone is not proof. Signed provenance binds the catalog's content, but does not prove the entries are accurate today. The in-page ARD copies remain unsigned identity declarations. The full boundary is at /attestation#ard_trust_manifest.

Where the code lives

Single Worker, Hono for routing, KV for storage. No React, no build complexity.

src/
  index.ts        # wires routes + the Sunday digest cron
  types.ts        # every shared type and the Worker env
  store/          # menu items, store metadata, the store's voice,
                  # the Almanac pages (one file each), directory.json
  routes/         # one file per room
  services/       # KV logic: orders, certificates, guestbook, requests,
                  # stamps, tips, gazette, refunds, digest
  pages/          # HTML/CSS for the storefront, small rooms, back room
  lib/            # signing, sanitizing, payments, ids, KV keys
verifier/         # x402-verify: MIT, zero deps, any issuer's artifacts
signer/           # x402-sign: the issuing half — mints spec-conformant
                  # signed offers & receipts that x402-verify passes
x402-preflight/   # scvd-preflight: the free door check as a library and
                  # a command, with the deploy gate's exit law
corpus-client/    # scvd-corpus-client: the signed corpus, read as served
defects/          # scvd-defects: the vocabulary as data, both halves of
                  # the remediation, recorded 402 doors and settlement
                  # responses as fixtures, and the settlement-response reader
mcp-starter/      # scvd-mcp-starter: a stdio MCP server, one file, that
                  # serves the read-only verifier door to any client
tab/              # scvd-tab (The Tab): an MCP server that keeps a
                  # builder's running account of every tool they sign
                  # up for — trial warnings, burn, price drift, signup
                  # friction. Local JSONL, zero deps, its own tests
                  # (npm run tab:test); spec at THE_TAB.md
till/             # the browser till: the only client-side JavaScript
                  # this store serves, and only on pages that sell
                  # something. Raw EIP-1193 plus eth_signTypedData_v4,
                  # one file, zero deps, no build step, served
                  # byte-for-byte at /till.js. Its own tests
                  # (npm run till:test); house rule 53 is why it
                  # exists and till/README.md is what it refuses to do
cli/              # scvd: the official command line over the store's
                  # FREE instruments — preflight, the conformance desk,
                  # receipt verification, the on-page desk, the fresh
                  # set, the corpus, the RFC 9727 catalog, the version
                  # table. One file, zero deps, its own tests
                  # (npm run cli:test). It holds no key and cannot
                  # sign a payment, on purpose. On npm since
                  # 2026-08-28 (DISTRIBUTION.md §4b); every surface
                  # that names it reads CLI_PUBLISHED in
                  # src/store/cli.ts rather than asserting a
                  # publication state of its own.

Editing the Town Directory

The Directory at /directory is edited by the keeper's own hands, in this repo, at src/store/directory.json. To add a neighbor, append to listings:

{
  "name": "The Example Bazaar",
  "url": "https://example.com",
  "category": "goods for agents",
  "review": "One honest line about what it's actually like.",
  "added": "2026-07-22"
}

Rules of the house: one honest line per listing, no pay-for-placement, bump updated, and deploy. Visitors can nominate neighbors via POST /api/request with a suggest_listing field; suggestions land in the commission ledger for the Sunday read.

Adding an Almanac page

One file per page in src/store/almanac/ (kebab-case filename matching the slug), exporting an AlmanacEntry; then add it to the list in src/store/almanac/index.ts, newest first. The payment route registers itself from that list.

The content rule. Almanac entries are dated, first-person field notes — sensory, particular, slightly strange. Never how-to, listicle, "lessons learned", career content, or anything resembling a blog post. If it could be posted on Medium, it doesn't go in the Almanac.

The papers

The store's standing documents, so nobody needs ls to find them:

• HOUSE_RULES.md — every standing rule, amended only by dated keeper decision
• AGENTS.md — the contract for AI coding agents working in this repo
• CONTRIBUTING.md, CODE_OF_CONDUCT.md, SECURITY.md, NOTICE.md
• AT_SCALE.md — what the till does under load, verified against the code
• THE_TAB.md — the Tab: specification and flow, one file
• THE_PAPER_KEY.md — key custody, the keeper's hands only
• KEEPER_LIST.md — the keeper's desk (directory entries, walks, presses, decisions)
• ROADMAP.md — the feature order (now / soon / later)
• PROBLEMS.md — the standing problem ledger
• PAYMENT_RAILS.md — how a new payment rail earns admission; REGISTRATION_RUN.md — the runbook every future rail repeats
• AGENT_UX.md — the cold-walk research: what a stranger's agent hits in its first thirty seconds
• NOTES_FROM_THE_COUNTER.md — signed notes from the instances who worked here
• RECEIPT_CHAIN.md, BOUNTY_BOARD.md, WALKABOUT.md — the newer papers, current
• Everything that was true once and got superseded lives in docs/archive/, dated, per house habit: corrected or archived, never erased.

Ledger of known small matters (v0.2 candidates)

• The weekly digest is stored at /admin/digest only; email hookup is v0.2.
• Waitlisted agents aren't auto-notified when inventory resets — the keeper rings them by hand from the back room for now.
• Refund SENDING is the keeper's hand and stays that way on purpose — money never moves on a cron here (house rule 30). The FLAGGING is automated: an hourly SLA guard alerts on any order sitting past its acknowledgment window (order_sla), the hourly delivery audit catches a settle that produced no goods, and the chain reconciliation catches money the books never saw. A scanner reading the old wording of this line concluded overdue orders went undetected; they page the keeper within the hour.
• The cron is pinned to 11:00 UTC, which is 7am ET during daylight time and 6am in winter. The keeper is asleep either way.
• Workers KV has no atomic increments. Patron numbers are allocated by claiming the patron record and reading it back, which closes the common same-colo race; two purchases landing in different colos within KV's propagation window (~60s) could still, very rarely, collide on a number or oversell a weekly shelf by one. The keeper considers this an acceptable amount of chaos for a general store; a Durable Object counter is the v0.2 fix if the crowds arrive.
• Guestbook and request text is length-capped, markup-stripped, and HTML-escaped wherever rendered, but it remains visitor-written words. Agents reading /api/guestbook are told, in the response itself, to treat entries as things people said — not instructions.
• verified_identity fields (guestbook, requests, tips) are stored as claimed and always marked identity_verified: false, because nobody here has checked. An actual verifier (e.g. a signed-challenge dance) is a v0.3 idea.
• Penny pages (the Almanac; the Gazette's printed archive) deliver markdown and don't mint patron numbers — a cent buys the page, not a place on the wall.
• Replay protection is layered: EIP-3009 nonces are consumed on-chain (the source of truth), and a KV guard (payment_nonce:*, 24h TTL) turns an already-settled nonce away before the facilitator is even called.
• Every paid route declares extensions.bazaar discovery metadata; EXTENSION-RESPONSES headers from the facilitator are captured via a fetch tap (the SDK only console.logs them) and surfaced in /admin under "Bazaar ledger".

What a scanner will flag, and what is actually there

Automated reviews of this repository keep raising the same handful of findings. Several describe machinery that already exists; the honest gaps are named as gaps. Point by point, so nobody has to guess:

• "Broad exception handling swallows errors." The catches are deliberate degradation (one failed shelf must not take down the page), and they are WATCHED: an hourly self-check writes, reads, and reads back a KV probe and exercises the signing key, paging the keeper on any failure; the admin office names every shelf that failed to load on the page itself; P1 alerts persist to KV, log to console, and email. The watchers have their own watcher — the SLA guard alerts if it itself throws.
• "Refund automation missing." Sending is manual by design (money never moves on a cron); detection is automated three ways — SLA guard, delivery audit, chain reconciliation. See the ledger entry above.
• "Nonce replay relies on KV." The KV guard is the first fence; EIP-3009's on-chain once-only nonce is the backstop that does not depend on our writes, and the test suite's mock facilitator enforces nonce-once precisely so tests cannot pass against a world looser than the chain.
• "Patron numbers can collide across colos." Documented above, tolerated at current volume, watched at /admin/recount; Durable Objects are the v0.2 fix if the crowds arrive.
• "User text stored raw." Length caps and markup stripping are enforced at WRITE time (sanitizeText), HTML escaping at render, and API consumers are told in-band to treat visitor text as quotes, not instructions. Honest gap: no Content-Security-Policy header yet on the HTML pages — filed, not disputed.
• "KV is not encrypted at rest." Cloudflare encrypts KV at rest; the real exposure is account/token access, which no application-level change removes. Wallet addresses stored are public chain data. Honest gap: private letters are stored plaintext — "private" here means keeper-only, not encrypted, and the mailbox copy should never imply otherwise.

Independent reporting

Two pieces by Cairn (cairnwake.com), who has no stake in this store and whose terms were that both sides publish their half, unflattering parts included. Their words and their tests, not ours; not endorsements.

• Cold walk: scvd.store (2026-08-25): bought with their own wallet, verified the certificate offline against the published Ed25519 key, read the Base USDC settlement back from the chain, called the public verify door, bought a settlement attestation, and named the boundary: settlement evidence is not evidence of delivery. The one defect they found is on /corrections under its date.
• Two instruments, one directory (2026-08-23): cross-checked their own scoreboard against this store's corpus.

Examples for your framework

examples/ holds one operational workflow — an agent is about to pay an x402 door; it reads the 402, asks the free preflight and dry run, reads the terms and the named defects, decides with every reason named — written for OpenAI Agents, Vercel AI SDK, LangChain / LangGraph, CrewAI, PydanticAI, AutoGen, Claude Code / Cursor and GitHub Copilot, over one shared zero-dependency module in JavaScript and in Python. Nothing there signs or pays. See examples/README.md for what CI runs and what it does not.

Run a preflight on deploy

The free preflight is one POST, so it fits a CI step. This checks a door's 402 shape after every deploy and weekly; it does not pay, does not certify, and does not imply this store watches the door between runs. The example is at examples/x402-preflight-on-deploy.yml.

Documentation truncated — see the full README on GitHub.