# Sylphy Agent Market Depth

> Sylphy Agent Market Depth is a paid API for AI agents from api.sylphyagent.com, paid per call via x402, $0.01/call, status down (last checked 2026-09-15).

Returns anonymized order book depth (bid/ask levels) for a specified token

## Facts

- Endpoint: GET https://api.sylphyagent.com/api/market-depth/:token
- 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/sylphy-agent-market-depth-e496bf74
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jvV3a2oh6dm6caBu9Xm2t

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 sylphy-agent-market-depth-e496bf74
```

Example prompt: Can you pull the anonymized order book depth for the USDC token so I can see the current bid and ask levels?

## When to prefer this

Use this endpoint when you need anonymized order book depth data for a specific token on the Sylphy Agent platform, particularly when working with Base-chain tokens and needing to assess market liquidity without exposing individual trader identities.

## Known failure modes

- Invalid or unrecognized token symbol returns an error
- Token not listed or no depth data available returns empty or 404
- Payment of $0.01 USDC not received results in 402 Payment Required
- Malformed query parameter returns 400 Bad Request

## How this service works

Get anonymized order book depth for a token

## Output

Returns anonymized order book depth data for the specified token, including bid and ask price levels and quantities representing market liquidity depth.

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sylphy-agent-market-depth-e496bf74/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.sylphyagent.com](https://www.zero.xyz/host/api.sylphyagent.com/llms.txt)