# vaults.fyi Single Vault Position Detail

> vaults.fyi Single Vault Position Detail is a paid API for AI agents from api.vaults.fyi, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-11).

Returns a detailed view of a specific user's position in a single vault on a given blockchain network.

## Facts

- Endpoint: HEAD https://api.vaults.fyi/v2/portfolio/positions/:userAddress/:network/:vaultId?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vaults-fyi-single-vault-position-detail-3f603d48
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6az-1z9RGTsdEGAWZUWAM

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 vaults-fyi-single-vault-position-detail-3f603d48 -d '<json body>'
```

Example prompt: Show me the detailed position for wallet 0xAbC123... in vault 0xVault456 on the Ethereum network using vaults.fyi.

## When to prefer this

Use this endpoint when you need detailed information about one specific vault position for a single user on a particular network. Prefer this over portfolio-wide endpoints when you only need to inspect a single vault, or when you have a specific vaultId and userAddress in hand and want depth rather than breadth.

## Known failure modes

- Invalid or non-existent userAddress returns 404 or empty result
- Unsupported network identifier causes a bad request error
- Invalid vaultId returns not found or empty response
- User has no position in the specified vault returns empty or zero position
- Network congestion or provider downtime causes timeout or 503 error

## How this service works

Gives a detailed view of one specific vault position on a given network.

## Output

A detailed breakdown of the user's position in the specified vault on the given network, including position size, asset details, and vault-specific metrics for that wallet address.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vaults-fyi-single-vault-position-detail-3f603d48/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.vaults.fyi](https://www.zero.xyz/host/api.vaults.fyi/llms.txt)