# DeFi Bridge Quote Aggregator

> DeFi Bridge Quote Aggregator is a paid API for AI agents from defi.halowerk.com, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-15).

Fetches live cross-chain bridge quotes for a token transfer, reporting received amounts, fees, gas costs, transfer times, and trust assumptions for every available route.

## Facts

- Endpoint: POST https://defi.halowerk.com/bridge/quote
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/defi-bridge-quote-aggregator-cd2c8c7f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GTKf-bhY7U0B8LTMUvIMd

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 defi-bridge-quote-aggregator-cd2c8c7f -d '<json body>'
```

Example prompt: Get me bridge quotes for sending 500 USDC from Ethereum mainnet to Arbitrum — show me the fees, how much I'd receive, estimated transfer time, and who I'd have to trust for each route so I can pick the best option.

## When to prefer this

Use this endpoint when an agent or user needs to move tokens across chains and wants a comprehensive, security-aware comparison of all available bridge routes rather than a single provider's quote. Particularly valuable when the user cares about trust assumptions and security models, not just price — making it suitable for large transfers where bridge failure risk is material. Prefer this over calling individual bridge APIs directly because it aggregates multiple providers in one call and explicitly surfaces trust and security metadata alongside cost data.

## Known failure modes

- No routes available for the requested token pair or chain combination
- Source or destination chain not supported by the aggregator
- Input amount below or above bridge limits for available routes
- Bridge APIs temporarily unavailable or returning stale data
- Invalid token address or unrecognized token symbol
- Network congestion causing gas estimates to be unreliable

## How this service works

Fetches live offers from a public bridge aggregator and reports for every option what arrives, what it costs in fees and gas, and how long it usually takes. The security model is given equal weight to the price: bridges are the most expensive failures this industry has, so trust_assumptions spells out who a user has to trust for that route to hold. No recommendation is forced - three best values by three criteria are given and the caller chooses. Limits: security_model and trust_assumptions come

## Output

A list of bridge route options, each detailing: the amount received at the destination after fees, total fee breakdown, estimated gas cost, typical transfer time, security model description, and trust assumptions (who the user must trust for the route to succeed). Three best-value picks are highlighted by different criteria (e.g. lowest cost, fastest time, best security), but no single route is forced as a recommendation.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "token": {
   "type": "string",
   "description": "Token contract address on the SOURCE chain, 0x followed by 40 hex characters."
  },
  "amount": {
   "type": "string",
   "description": "Amount in the smallest unit of the token, as a decimal string."
  },
  "to_chain": {
   "type": "string",
   "description": "Destination chain."
  },
  "to_token": {
   "type": "string",
   "description": "Optional token address on the destination chain. Defaults to the same asset."
  },
  "from_chain": {
   "type": "string",
   "description": "Source chain, for example base or ethereum."
  },
  "from_address": {
   "type": "string",
   "description": "Optional sender address used for the quote. A neutral address is used when omitted."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/defi-bridge-quote-aggregator-cd2c8c7f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from defi.halowerk.com](https://www.zero.xyz/host/defi.halowerk.com/llms.txt)