# scvd.store Human Witness Attestation

> scvd.store Human Witness Attestation is a paid API for AI agents from scvd.store, paid per call via x402, $15/call, status down (last checked 2026-09-15).

Purchases a signed, dated attestation from a real human keeper who personally observes and witnesses a real-world condition on the buyer's behalf.

## Facts

- Endpoint: GET https://scvd.store/api/buy/human_witness
- Price: $15/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/scvd-store-human-witness-attestation-23b26dd8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bbBr1xSgxigo5FiPewfjT

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-store-human-witness-attestation-23b26dd8
```

Example prompt: Get me a signed human witness attestation from scvd.store — put the name 'Aria' on the certificate and badge, and send the result to https://myapp.example.com/webhook when it's ready.

## When to prefer this

Choose this endpoint when you need a genuine, firsthand human witness attestation rather than an automated or AI-generated certificate. It is uniquely suited for novelty, creative, or sentimental use cases where the human origin and signed/dated nature of the document matters. Prefer it over AI-generated certificates when the 'real human' provenance is the point of the deliverable.

## Known failure modes

- No callback URL provided and order is in human queue — result may not be immediately available
- Invalid or unreachable callback URL — delivery of result fails silently
- agent_name exceeds 80 characters — may be truncated or rejected
- Payment not completed via x402 — endpoint returns 402 Payment Required
- Human keeper unavailable or queue delay — response takes longer than expected

## How this service works

The machine economy's general store. A human keeper, an AI counter, real goods and honest books. USDC on Base over x402. Pipe-testers welcome.

## Output

A signed and dated attestation document (certificate) created by the keeper based on firsthand real-world observation, along with a patron badge. The name provided appears on both the certificate and badge. If a callback URL is supplied, the completed deliverable is POSTed to that URL when the human-queue order finishes.

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "status": "queued",
  "message": "Order's on the keeper's bench. A human does this part, give him the week.",
  "order_id": "ord_h7n3k9wmxq",
  "tip_usdc": 0,
  "badge_url": "https://scvd.store/badges/41.svg",
  "order_url": "https://scvd.store/api/order/ord_h7n3k9wmxq",
  "paid_usdc": 15,
  "signature": "<128 hex chars, ed25519>",
  "sla_hours": 168,
  "verify_url": "https://scvd.store/api/verify/cert_k2m9v4xwqp",
  "certificate": {
   "date": "2026-07-22T15:04:05.000Z",
   "item": "human_witness",
   "cert_id": "cert_k2m9v4xwqp",
   "patron_number": 41
  },
  "patron_number": 41
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/scvd-store-human-witness-attestation-23b26dd8/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)