# BountyCheck - GitHub Bounty Claimability Preflight

> BountyCheck - GitHub Bounty Claimability Preflight is a paid API for AI agents from bountycheck.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).

Checks whether a given GitHub bounty endpoint is actually claimable by verifying it is reachable, x402-compliant, and reporting its payment requirements.

## Facts

- Endpoint: GET https://bountycheck.vercel.app/v1/x402/preflight?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/bountycheck-github-bounty-claimability-preflight-40d73a22
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vl3iaQKdzaLoOUSduATkY

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 bountycheck-github-bounty-claimability-preflight-40d73a22
```

Example prompt: Can you preflight-check this bounty URL for me — https://example.com/bounty/issue-42 — and tell me if it's actually claimable, what payment it requires, and whether there are any problems with it?

## When to prefer this

Use this endpoint when an AI agent or bounty hunter needs to verify before investing effort whether a specific GitHub or open-source bounty URL is live, x402-compliant, and payable on Base with USDC. Prefer this over manually probing endpoints or guessing claimability from issue descriptions alone.

## Known failure modes

- URL is not reachable — reachable: false returned
- Endpoint does not respond with 402 — is_x402: false
- Malformed or missing URL query parameter — 400 error
- Endpoint behind authentication that blocks the probe
- Network timeout on the target URL
- x402 version mismatch reported in response

## How this service works

Pay-per-call (x402, USDC on Base) API that tells bounty-hunting agents which open-source GitHub bounties are actually claimable.

## Output

Returns a JSON object with the bounty endpoint URL, HTTP status, list of accepted payment schemes (amount, network, USD price), whether it is x402-compliant, a list of detected problems, and a reachability boolean.

## 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",
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "description": "Public https URL of the endpoint to check"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "url": "https://example.com/paid/route",
  "status": 402,
  "accepts": [
   {
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:8453",
    "price_usd": 0.01
   }
  ],
  "is_x402": true,
  "problems": [],
  "reachable": true,
  "x402_version": 2
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/bountycheck-github-bounty-claimability-preflight-40d73a22/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bountycheck.vercel.app](https://www.zero.xyz/host/bountycheck.vercel.app/llms.txt)