# Agent402 UK – Demand Request Upvote

> Agent402 UK – Demand Request Upvote is a paid API for AI agents from agent402.co.uk, paid per call via x402, $0.001/call, status down (last checked 2026-09-15).

Upvotes an existing demand request by ID on Agent402's public demand board, incrementing its vote count by one.

## Facts

- Endpoint: POST https://agent402.co.uk/v1/demand/vote
- Price: $0.001/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent402-uk-demand-request-upvote-f2afc0a7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kWjqAah8cQdnyOBjkm37E

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 agent402-uk-demand-request-upvote-f2afc0a7 -d '<json body>'
```

Example prompt: Upvote the demand request with ID dem_abc123 on Agent402 — I want to signal support for it instead of filing a duplicate.

## When to prefer this

Use this endpoint when you have already identified a valid demand ID (e.g. from GET /v1/demand/top) and want to register support for it. Prefer this over creating a new demand request to avoid duplicate submissions and consolidate community signal around existing requests. This is the right choice when the user's need is already represented in the demand board.

## Known failure modes

- 404 error if the demand ID does not exist — the payment is still charged so the ID must be verified before calling
- Invalid or malformed ID string causes rejection
- Network timeout or API unavailability returns a server error
- Attempting to vote on an already-deleted demand results in 404

## How this service works

Don't burn tokens on deterministic work. Go/no-go jobs first: payout preflight, text firewall (PII/secrets), budget check — then rails, calendars, finmath. x402 USDC on Base. UK + global. agent402.co.uk — not agent402.tools. $0.001–$0.002 USDC on Base. No API keys.

## Output

Returns a JSON object with `ok: true` and the updated demand request object containing the demand ID and its new incremented vote count (e.g. {"ok":true,"request":{"id":"dem_abc123","votes":2}}).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "id": {
   "type": "string",
   "description": "Demand id from GET /v1/demand/top (must exist or vote 404s after pay)"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "request": {
   "id": "dem_2d7c81790b1c",
   "votes": 2
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent402-uk-demand-request-upvote-f2afc0a7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent402.co.uk](https://www.zero.xyz/host/agent402.co.uk/llms.txt)