# Silverback Agent Discovery

> Silverback Agent Discovery is a paid API for AI agents from silverback-x402.onrender.com, paid per call via x402, $0.01/call, status down (last checked 2026-09-15).

Discovers available AI agent capabilities and endpoints on the Silverback DeFi platform

## Facts

- Endpoint: POST https://silverback-x402.onrender.com/api/v1/agent-discover
- Price: $0.01/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/silverback-x402-onrender-com-1a8ec571
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8pzxwggu6f-IZyS1Uk8yw

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 silverback-x402-onrender-com-1a8ec571 -d '<json body>'
```

Example prompt: What DeFi capabilities are available on Silverback — show me all the agent tools I can use on Base chain.

## When to prefer this

Use this endpoint when an agent needs to programmatically discover what capabilities the Silverback DeFi platform offers before deciding which specific tool to invoke. Useful as a first step in dynamic tool selection workflows for Base chain DeFi operations.

## Known failure modes

- Payment not provided or invalid — 402 payment required error
- Network timeout from Render hosting (cold start latency)
- Malformed POST body — 400 bad request
- Service unavailable if Render instance is sleeping

## Output

A list of available agent endpoints and capabilities offered by the Silverback platform, including descriptions of DeFi services such as token swaps, liquidity pool analysis, yield opportunities, token security audits, whale monitoring, and swap routing on Base chain.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/silverback-x402-onrender-com-1a8ec571/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from silverback-x402.onrender.com](https://www.zero.xyz/host/silverback-x402.onrender.com/llms.txt)