# TrollBridge Bridge Fees Quote

> TrollBridge Bridge Fees Quote is a paid API for AI agents from mini-tollbooth.onrender.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-11).

Returns a cross-chain token bridge quote including fees, estimated output amount, gas costs, and ETA using LiFi/AcrossV4 routing

## Facts

- Endpoint: GET https://mini-tollbooth.onrender.com/bridge-fees?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/trollbridge-bridge-fees-quote-257f879d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IOxVhmDyEnqCNGnv1MzzS

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 trollbridge-bridge-fees-quote-257f879d
```

Example prompt: What are the current bridge fees and estimated output if I move 1 USDC (1000000 in smallest units) from Ethereum (chain 1) to Polygon (chain 137)?

## When to prefer this

Use this endpoint when an AI agent or application needs a real-time cross-chain bridge quote before executing a token transfer, especially when using LiFi or Across V4 routing. Prefer this over raw DEX aggregator APIs when you need an all-in-one fee + gas + ETA estimate in a single call with x402 micropayment access.

## Known failure modes

- Missing required query parameters (fromChain, toChain, fromToken, toToken, fromAmount) returns an error
- Unsupported chain pair or token combination returns no route found
- Invalid chain ID format causes a bad request error
- Payment of $0.05 USDC not provided results in 402 Payment Required
- Very small amounts may fail minimum threshold checks
- Network congestion may cause stale or unavailable gas estimates

## How this service works

The insurance booth for AI agents, with Mini's Agent Supply Store on the side of the road. One hundred checkpoints: pre-transaction safety lanes (honeypot, approval-risk, rug-score, receipt-check, tx-dryrun, permit-scan, airdrop-verdict, deployer-history, wallet-watch, secret-scan at $0.02 USDC per call; the protection tier — /contract-check, /approval-screen, /tx-plain-english, /honeypot-check, /tx-simulate, /redteam, /skill-scan, /verdict, /egress-audit, /tool-gate, /airlock, /repo-scan, /prove, /task-scope — at $0.10; the one-call /shield don't-get-rugged screen at $0.25; the full /preflight bundle at $0.05), bounty intel (bounties, fresh, verdicts, deadlines, sweepstakes, opportunities) at $0.02 USDC per call, trader intel (/prices and /quant at $0.02; /enrich and /token-check at $0.05; /contract-check and /honeypot-check at $0.10; /sec-facts at $0.05), market intel (/markets and /search at $0.05; /grants at $0.02), DeFi intel (/yields and /new-pairs at $0.05; /gas and /defi at $0.02), AI intel (/models at $0.02), agent-ops intel (/prompt-cost, /model-picks, /rpc-speed, /terms-tldr, /scrape, /gigs, /retry-verify, /idempotency, /verify-independent at $0.02; /site-watch, /wallet-check, /code-run, /regulatory-pack, /sage, /cron-watch, /caveat-check, /tripwire, /escrow, /trust, /bridge-fees, /dao-votes, /dev-activity, /dex-arb, /dydx-perps, /funding-rates, /gas-predict, /hack-tracker, /long-short-ratio, /lp-yields, /mev-scan, /open-interest, /perp-basis, /polymarket-odds, /rwa-watch, /sentiment, /stablecoin-flows, /tokenomics, /top-movers, /whale-watch, and /yield-stable at $0.05; /approval-screen, /tx-plain-english, /tx-simulate, and /task-scope at $0.10; /scam-scan deep scan at $5.00 or 30-day subscription at $30.00), supply store (/road-pack combo meal at $0.05; curated datasets, the /audit-prep pre-audit review, and the /prove-state symbolic-execution run at $1.00; the /audit AI-agent audit at $25.00). Every lane answers before money moves — heuristic verdicts, not audits. Don't get rugged.

## Output

A JSON object containing the source and destination chain/token pair, the bridge tool used (e.g. AcrossV4), expected output amount, minimum output amount after slippage, itemized fee breakdown (protocol fees in USDC), gas breakdown (gas cost in ETH), total fees in USD, and estimated transfer time in seconds.

## 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": [],
     "properties": {
      "limit": {
       "type": "integer",
       "maximum": 200,
       "minimum": 1,
       "description": "Max items to return. Omit for the full feed."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "to": {
   "token": "USDC",
   "chainId": 137
  },
  "from": {
   "token": "USDC",
   "chainId": 1
  },
  "lane": "/bridge-fees",
  "tool": "AcrossV4",
  "toAmount": 0.99,
  "fromAmount": 1,
  "description": "Cross-chain bridge quote ($0.05) — LiFi route, fees, and ETA for moving tokens between chains.",
  "toAmountMin": 0.98,
  "feeBreakdown": [
   {
    "type": "network",
    "token": "USDC",
    "amountUsd": 0.15
   }
  ],
  "gasBreakdown": [
   {
    "type": "gas",
    "token": "ETH",
    "amountUsd": 0.06
   }
  ],
  "totalFeesUsd": 0.21,
  "estimatedSeconds": 2
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/trollbridge-bridge-fees-quote-257f879d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mini-tollbooth.onrender.com](https://www.zero.xyz/host/mini-tollbooth.onrender.com/llms.txt)