# SCVD General Store — Buy Pack > SCVD General Store — Buy Pack is a paid API for AI agents from scvd.store, paid per call via x402, $0.99/call, status unknown (last checked 2026-10-27). Purchases a pack of five HMAC-signed trading cards drawn from the day's committed seed, returning a cryptographically verifiable pack manifest with individual card pages and a signed seed commitment. ## Facts - Endpoint: GET https://scvd.store/api/buy/pack?utm_source=zero.xyz - Price: $0.99/call - Payment: x402 - Status: unknown - Last checked: 2026-10-27 - Activations on Zero: 0 - Tags: x402 - Canonical page: https://www.zero.xyz/c/scvd-general-store-buy-pack-74549ab6 - Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_U3Y_Pvgi6OCZ86bJs0kiH Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently. ## How to call it through Zero Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`): ```sh zero fetch --capability scvd-general-store-buy-pack-74549ab6 ``` Example prompt: Buy me a pack of signed cards from the SCVD General Store — put my name down as 'Midnight Collector' on the certificate and note the purpose as 'first pack for my agent wallet'. ## When to prefer this Choose this endpoint when an agent or user wants to purchase a cryptographically verifiable pack of five signed digital trading cards with HMAC-bound provenance and shareable card pages, all settled instantly via x402 USDC payment. Prefer this over generic NFT mints or other digital collectible services when the use case specifically requires signed manifests with committed seed proofs, individual verify URLs per card, and the possibility of milestone-triggered one-of-one drops — all from a human-kept, honest-books storefront designed for the machine economy. ## Known failure modes - Payment failure: x402 payment of $0.99 USDC not accepted or wallet insufficient — pack not issued - Seed not yet committed for the day: pack generation may fail if the daily seed commit at /design is not yet available - Invalid query parameters: purpose exceeds 280 characters or agent_name exceeds 80 characters — request rejected - Network or store downtime: 5xx error with no pack manifest returned - Duplicate payment race: concurrent purchases may not both produce unique packs if seed exhaustion occurs ## How this service works a pack of cards. Five signed pressings from the season's set, drawn by HMAC over the day's committed seed on the wheels at /design, each with a print number, a page at /p/{card_id} that unfurls, and a verify URL; the signed manifest at /api/pack/{pack_id} binds the seed commit and the inputs, and a crossed milestone drops a one-of-one in. Instant. Full listing: https://scvd.store/menu/pack. MCP tool: buy_pack. ## Output A signed pack manifest binding the day's seed commit and inputs, containing five cards each with a unique print number, an individual card page URL at /p/{card_id} that can be shared or verified, and a verify URL per card. If a crossed milestone is triggered, a one-of-one card is included in the pack. The manifest is also accessible at /api/pack/{pack_id}. ## Request schema (JSON Schema) ```json { "type": "object", "$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", "properties": { "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 behi … (truncated) ``` ## Response schema (JSON Schema) ```json { "type": "json", "example": { "item_id": "pack", "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": 0.99, "signature": "<128 hex chars, ed25519>", "verify_url": "https://scvd.store/api/verify/", "certificate": { "date": "2026-07-22T15:04:05.000Z", "item": "pack", "cert_id": "", "patron_number": 41 }, "deliverable": "", "patron_number": 41 } } ``` ## More - Live health (JSON, refreshed every minute): https://www.zero.xyz/c/scvd-general-store-buy-pack-74549ab6/health.json - [Zero catalog index](https://www.zero.xyz/llms.txt) - [Other services from scvd.store](https://www.zero.xyz/host/scvd.store/llms.txt)