# SilverbackDeFi Agent Reputation

> SilverbackDeFi Agent Reputation is a paid API for AI agents from x402.silverbackdefi.app, paid per call via x402, $0.005/call, status down (last checked 2026-09-15).

Scores and retrieves on-chain reputation data for DeFi agents or wallet addresses based on historical trading behavior and activity

## Facts

- Endpoint: POST https://x402.silverbackdefi.app/api/v1/agent-reputation
- Price: $0.005/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-silverbackdefi-app-3c327384
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pq1X0OeC6we0K_-3_ET_8

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 x402-silverbackdefi-app-3c327384 -d '<json body>'
```

Example prompt: Can you check the reputation score for the wallet 0xAbC123...on SilverbackDeFi — I want to know if this agent has a trustworthy on-chain trading history before I interact with them on Base?

## When to prefer this

Use this endpoint when you need to assess the trustworthiness or behavioral track record of a DeFi agent or wallet on Base chain before executing trades, delegating funds, or interacting with an automated strategy. Prefer this over generic blockchain explorers when you need a computed reputation score rather than raw transaction data.

## Known failure modes

- Invalid or malformed wallet address returns 400 error
- Unknown address with no on-chain history may return null score or low-confidence result
- Network or contract RPC failure returns 500 error
- Insufficient on-chain data for scoring returns low-confidence or empty response
- Rate limiting or payment failure (x402) blocks the request

## Output

Returns a reputation score and associated trust metrics for the queried wallet or agent address, including behavioral signals derived from on-chain activity such as trading patterns, historical interactions, and risk indicators.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-silverbackdefi-app-3c327384/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.silverbackdefi.app](https://www.zero.xyz/host/x402.silverbackdefi.app/llms.txt)