# Bridge Screen – Cross-Chain Bridge Risk Scorer

> Bridge Screen – Cross-Chain Bridge Risk Scorer is a paid API for AI agents from payai.agentstools.dev, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Returns a deterministic 0-100 risk score and safe/caution/avoid verdict for a named cross-chain bridge, fusing trust model, TVL depth, exploit history, and governance risk.

## Facts

- Endpoint: GET https://payai.agentstools.dev/bridge/screen
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/bridge-screen-cross-chain-bridge-risk-scorer-eb5326c0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dEYkwnWyAkZcNyn5x_UbD

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 bridge-screen-cross-chain-bridge-risk-scorer-eb5326c0
```

Example prompt: Before I bridge my ETH over to Arbitrum using Stargate, can you check the risk score and tell me if it's safe, cautious, or something to avoid — and why?

## When to prefer this

Choose this endpoint when you need a single, pre-fused risk verdict for a cross-chain bridge without manually reconciling L2Beat, DefiLlama TVL data, and hack post-mortems. It is ideal for pre-transaction safety checks, DeFi agent workflows that route funds cross-chain, or any scenario requiring a fast deterministic bridge risk signal. Prefer it over manual research when speed and consistency matter more than the most up-to-the-minute live data.

## Known failure modes

- Bridge name not recognized or not in covered set — returns an error or null result
- Misspelled or ambiguous bridge alias that doesn't resolve — endpoint may return an error
- Stale data if the underlying TVL or exploit feeds haven't been refreshed recently
- Payment failure via x402 protocol resulting in 402 response before data is returned

## How this service works

Cross-chain bridge safety screen: given a bridge (Stargate, Across, Wormhole, Arbitrum, CCTP, ...), returns a deterministic 0-100 risk score and a safe/caution/avoid verdict fusing its trust model, TVL depth, exploit history and governance/upgrade risk, with the reasons. One call instead of reconciling L2Beat, DefiLlama TVL and hack post-mortems yourself.

## Output

A JSON object containing: a deterministic integer risk score from 0 to 100, a categorical verdict of 'safe', 'caution', or 'avoid', and a list of human-readable reasons covering the bridge's trust model, TVL depth, historical exploits, and governance/upgrade risk factors.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "bridge"
     ],
     "properties": {
      "bridge": {
       "type": "string",
       "description": "Bridge name, slug or alias (e.g. Stargate, Across, Wormhole, Arbitrum, CCTP). Resolved case-insensitively to the covered set."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/bridge-screen-cross-chain-bridge-risk-scorer-eb5326c0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from payai.agentstools.dev](https://www.zero.xyz/host/payai.agentstools.dev/llms.txt)