# Phantom API — Tempo RPC Endpoint

> Phantom API — Tempo RPC Endpoint is a paid API for AI agents from phantom-api-omega.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Executes JSON-RPC calls against blockchain networks to retrieve on-chain data and smart contract state across 57+ networks via pay-per-call infrastructure

## Facts

- Endpoint: POST https://phantom-api-omega.vercel.app/api/tempo/rpc
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/phantom-api-tempo-rpc-endpoint-921523fa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NrIqz19T71B3KIx8EjndY

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 phantom-api-tempo-rpc-endpoint-921523fa -d '<json body>'
```

Example prompt: Use the Phantom API RPC endpoint to call eth_getBalance with params ['0xde0B295669a9FD93d5F28D9Ec85E40f4cb697BAe', 'latest'] and return the ETH balance of that wallet.

## When to prefer this

Choose this endpoint when you need fast, pay-per-call access to raw blockchain RPC data across a broad range of EVM-compatible networks (57+) without committing to a subscription. Ideal for agents that need occasional or bursty on-chain lookups without managing their own node infrastructure. Prefer over Alchemy or Infura when you want micro-payment (x402/USDC) billing rather than API key subscriptions.

## Known failure modes

- Invalid RPC method name returns error with code -32601 (Method not found)
- Malformed params array causes -32602 (Invalid params) error
- Unsupported network or misconfigured endpoint returns connection error
- Payment failure or insufficient USDC balance results in 402 Payment Required response
- Rate limiting may occur under high call volume
- Smart contract revert returns execution error in result

## How this service works

Lightning-fast access to blockchain data, smart contract insights, and Web3 infrastructure across 57+ networks. Pay-per-call via x402.

## Output

Returns a JSON-RPC response object containing the result field populated with the requested on-chain data (e.g. balance in hex wei, block number in hex, contract return value, transaction receipt object), or an error object with code and message if the call fails.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "method": {
   "type": "string"
  },
  "params": {
   "type": "array",
   "items": {}
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/phantom-api-tempo-rpc-endpoint-921523fa/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from phantom-api-omega.vercel.app](https://www.zero.xyz/host/phantom-api-omega.vercel.app/llms.txt)