# Oracle Swarm Vault - Entity Resolve

> Oracle Swarm Vault - Entity Resolve is a paid API for AI agents from x402.billionaireorder.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).

Resolves a blockchain address or on-chain identifier to a Farcaster or social identity profile, returning FID, source, and linked address.

## Facts

- Endpoint: POST https://x402.billionaireorder.com/v1/entity-resolve?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/oracle-swarm-vault-entity-resolve-6b50100b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_t8_KyrlVip7IJKkfiCbCo

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 oracle-swarm-vault-entity-resolve-6b50100b -d '<json body>'
```

Example prompt: Can you resolve the wallet address 0xABC123... on Base to its Farcaster identity — I want to know the FID and which social profile it's linked to?

## When to prefer this

Choose this endpoint when you need to resolve a blockchain address to a Farcaster social identity in a lightweight, pay-per-call manner without API key setup. Ideal for agents operating in the Base/Ethereum ecosystem that need on-chain-to-social identity mapping. Prefer over broader identity APIs when Farcaster-specific resolution is the goal and cost-per-call economics via x402 USDC micropayments fit your architecture.

## Known failure modes

- Address not linked to any known Farcaster or social identity — found: false returned
- Unsupported chain value causes resolution failure
- Malformed input_data (not a valid address) returns error
- Payment failure via x402 micropayment blocks the call
- Rate limiting or service downtime returns 4xx/5xx

## How this service works

Pay-per-call USDC on Base for AI agents: wallet trust, honeypot rug check, web extract, KOL signals, whale alerts, 12-trait persona generator. No API key, x402 micropayments.

## Output

Returns a JSON object containing whether the entity was found (found: true/false), the Farcaster ID (fid), the source of the identity resolution (e.g. 'farcaster'), and the linked wallet address. If not found, found will be false and other fields may be absent.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "input_data"
 ],
 "properties": {
  "chain": {
   "type": "string",
   "description": "Chain eip155:8453"
  },
  "input_data": {
   "type": "string",
   "description": "Wallet address or input data"
  },
  "agent_ref_hash": {
   "type": "string",
   "description": "Agent ref"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "fid": 3,
  "found": true,
  "source": "farcaster",
  "address": "0x..."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/oracle-swarm-vault-entity-resolve-6b50100b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.billionaireorder.com](https://www.zero.xyz/host/x402.billionaireorder.com/llms.txt)