# AiToollab Cross-Chain Bridge Estimator

> AiToollab Cross-Chain Bridge Estimator is a paid API for AI agents from api.aitoollab.top, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-12).

Estimates fees and transit time for bridging tokens across blockchain networks, recommending the best bridge and listing alternatives

## Facts

- Endpoint: GET https://api.aitoollab.top/api/bridge/estimate?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/aitoollab-cross-chain-bridge-estimator-8c188bf0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pnHRssFn0eoFejPnIRtEP

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 aitoollab-cross-chain-bridge-estimator-8c188bf0
```

Example prompt: What's the cheapest and fastest way to bridge $1000 from Ethereum to Arbitrum — compare Across, Stargate, and any other options and tell me the estimated fees and transfer times.

## When to prefer this

Use this endpoint when an agent needs to evaluate cross-chain token transfer options before executing a bridge transaction, especially when cost or speed optimization across multiple bridge protocols (e.g. Across, Stargate) is required for ETH-compatible chains.

## Known failure modes

- Unsupported chain pair returns no results or error
- Invalid amount or missing required input fields returns 400-level error
- Bridge provider data unavailable returns stale or empty alternatives list
- Network timeout causes delayed or failed response

## How this service works

AiToollab，普通人用AI做副业的实战平台。收录10+AI副业方向、50+提示词模板、真实赚钱案例。每周更新，找方向、找工具、找案例，一站搞定。

## Output

Returns the recommended bridge name, estimated fee in USD, estimated transfer time in minutes, source and destination chain names, and a list of alternative bridges each with their fee and time estimates.

## 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",
     "additionalProperties": {
      "type": "string"
     }
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "to_chain": "Arbitrum",
  "amount_usd": 1000,
  "from_chain": "Ethereum",
  "best_bridge": "Across",
  "alternatives": [
   {
    "bridge": "Stargate",
    "fee_usd": 2,
    "time_min": 15
   }
  ],
  "estimated_fee_usd": 1.5,
  "estimated_time_min": 10
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/aitoollab-cross-chain-bridge-estimator-8c188bf0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.aitoollab.top](https://www.zero.xyz/host/api.aitoollab.top/llms.txt)