# Agent Utilities — Proof Handoff (Bounty Radar & Bid Draft)

> Agent Utilities — Proof Handoff (Bounty Radar & Bid Draft) is a paid API for AI agents from x402.devvizion.com, paid per call via x402, $0.012/call, status unknown (last checked 2026-09-13).

Returns a free sample bounty radar then unlocks a full bounty radar or AI-generated bid draft via x402 micropayment on Base.

## Facts

- Endpoint: POST https://x402.devvizion.com/v0/proof-handoff
- Price: $0.012/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agent-utilities-proof-handoff-bounty-radar-bid-draft-c58e18bd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JkWQfw5fqytSjmcKFiviT

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 agent-utilities-proof-handoff-bounty-radar-bid-draft-c58e18bd -d '<json body>'
```

Example prompt: Can you pull a full bounty radar for the topic 'AI safety research' — limit it to 10 results — and if there's a good match, draft a bid for me based on this brief: 'Experienced AI researcher available for policy and red-teaming contracts'?

## When to prefer this

Choose this endpoint when an AI agent needs to discover bounty opportunities or generate a bid proposal without a subscription, paying only per call in USDC via x402 on Base. It is especially useful for freelance or research agents that need on-demand radar sweeps or one-off bid drafts rather than recurring access.

## Known failure modes

- Payment not received or insufficient USDC balance — returns 402 Payment Required
- Invalid or missing topic/brief field — returns malformed or empty radar
- Pack ID not found — no results returned for /v0/pack lookups
- Rate limiting or upstream service unavailability — timeout or 503
- Scene or brief too vague — low-quality or generic bid draft generated

## How this service works

Free sample bounty radar, then paid full radar (0.015 USDC) or bid draft (0.01 USDC) on Base via x402. No subscription.

## Output

A markdown-formatted document containing either a full bounty radar (list of relevant bounty opportunities matching the topic, scored or ranked) or an AI-generated bid draft tailored to the provided job brief or scene — delivered after x402 micropayment verification on Base.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "description": "Optional URL alias for topic"
  },
  "brief": {
   "type": "string",
   "description": "Bid-draft job brief"
  },
  "limit": {
   "type": "number",
   "description": "Radar result limit"
  },
  "scene": {
   "type": "string",
   "description": "Storyboard scene description"
  },
  "topic": {
   "type": "string",
   "description": "Research topic, scene, or brief text"
  },
  "packId": {
   "type": "string",
   "description": "Pack id for /v0/pack"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "contentType": "text/markdown; charset=utf-8",
  "description": "proof-handoff markdown response"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-utilities-proof-handoff-bounty-radar-bid-draft-c58e18bd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.devvizion.com](https://www.zero.xyz/host/x402.devvizion.com/llms.txt)